diff --git a/.gitignore b/.gitignore
index f451242..80e14dc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,4 +17,6 @@ Cargo.lock
 
 .DS_Store
 
+.idea
+
 dbgfle*
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index 844fb51..76e45e1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,6 +31,7 @@ num = "0.4.0"
 svg = {version = "0.13", optional = true}
 resvg = {version = "0.28.0", optional = true, default-features=false}
 serde = { version = "1.0", features = ["derive", "rc"], optional = true }
+thiserror = "1.0.38"
 
 [dev-dependencies]
 java-properties = "1.4.1"
diff --git a/src/aztec/aztec_reader.rs b/src/aztec/aztec_reader.rs
index 76e392c..e33c1b3 100644
--- a/src/aztec/aztec_reader.rs
+++ b/src/aztec/aztec_reader.rs
@@ -61,7 +61,7 @@ impl Reader for AztecReader {
         } else if let Ok(det) = detector.detect(true) {
             det
         } else {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         };
 
         let points = detectorRXingResult.getPoints();
diff --git a/src/aztec/aztec_writer.rs b/src/aztec/aztec_writer.rs
index fb36ae0..7eb7118 100644
--- a/src/aztec/aztec_writer.rs
+++ b/src/aztec/aztec_writer.rs
@@ -60,7 +60,7 @@ impl Writer for AztecWriter {
             if cset_name.to_lowercase() != "iso-8859-1" {
                 charset = Some(
                     encoding::label::encoding_from_whatwg_label(cset_name)
-                        .ok_or(Exceptions::illegalArgument)?,
+                        .ok_or(Exceptions::ILLEGAL_ARGUMENT)?,
                 );
             }
         }
@@ -96,7 +96,7 @@ fn encode(
     layers: i32,
 ) -> Result<BitMatrix> {
     if format != BarcodeFormat::AZTEC {
-        return Err(Exceptions::illegalArgumentWith(format!(
+        return Err(Exceptions::illegal_argument_with(format!(
             "can only encode AZTEC, but got {format:?}"
         )));
     }
diff --git a/src/aztec/decoder.rs b/src/aztec/decoder.rs
index 52b217b..c3ddafe 100644
--- a/src/aztec/decoder.rs
+++ b/src/aztec/decoder.rs
@@ -162,13 +162,13 @@ fn get_encoded_data(corrected_bits: &[bool]) -> Result<String> {
                 result.push_str(
                     &encdr
                         .decode(&decoded_bytes, encoding::DecoderTrap::Strict)
-                        .map_err(|a| Exceptions::illegalStateWith(a))?,
+                        .map_err(|a| Exceptions::illegal_state_with(a))?,
                 );
 
                 decoded_bytes.clear();
                 match n {
                     0 => result.push(29 as char), // translate FNC1 as ASCII 29
-                    7 => return Err(Exceptions::formatWith("FLG(7) is reserved and illegal")), // FLG(7) is reserved and illegal
+                    7 => return Err(Exceptions::format_with("FLG(7) is reserved and illegal")), // FLG(7) is reserved and illegal
                     _ => {
                         // ECI is decimal integer encoded as 1-6 codes in DIGIT mode
                         let mut eci = 0;
@@ -180,7 +180,7 @@ fn get_encoded_data(corrected_bits: &[bool]) -> Result<String> {
                             let next_digit = read_code(corrected_bits, index, 4);
                             index += 4;
                             if !(2..=11).contains(&next_digit) {
-                                return Err(Exceptions::formatWith("Not a decimal digit"));
+                                return Err(Exceptions::format_with("Not a decimal digit"));
                                 // Not a decimal digit
                             }
                             eci = eci * 10 + (next_digit - 2);
@@ -188,7 +188,7 @@ fn get_encoded_data(corrected_bits: &[bool]) -> Result<String> {
                         }
                         let charset_eci = CharacterSetECI::getCharacterSetECIByValue(eci);
                         if charset_eci.is_err() {
-                            return Err(Exceptions::formatWith("Charset must exist"));
+                            return Err(Exceptions::format_with("Charset must exist"));
                         }
                         encdr = CharacterSetECI::getCharset(&charset_eci?);
                     }
@@ -201,8 +201,8 @@ fn get_encoded_data(corrected_bits: &[bool]) -> Result<String> {
                 // That's including when that mode is a shift.
                 // Our test case dlusbs.png for issue #642 exercises that.
                 latch_table = shift_table; // Latch the current mode, so as to return to Upper after U/S B/S
-                shift_table = getTable(str.chars().nth(5).ok_or(Exceptions::indexOutOfBounds)?);
-                if str.chars().nth(6).ok_or(Exceptions::indexOutOfBounds)? == 'L' {
+                shift_table = getTable(str.chars().nth(5).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?);
+                if str.chars().nth(6).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? == 'L' {
                     latch_table = shift_table;
                 }
             } else {
@@ -223,7 +223,7 @@ fn get_encoded_data(corrected_bits: &[bool]) -> Result<String> {
     if let Ok(str) = encdr.decode(&decoded_bytes, encoding::DecoderTrap::Strict) {
         result.push_str(&str);
     } else {
-        return Err(Exceptions::illegalStateWith("bad encoding"));
+        return Err(Exceptions::illegal_state_with("bad encoding"));
     }
     //   result.push_str(decodedBytes.toString(encoding.name()));
     //} catch (UnsupportedEncodingException uee) {
@@ -275,7 +275,7 @@ fn get_character(table: Table, code: u32) -> Result<&'static str> {
         Table::Mixed => Ok(MIXED_TABLE[code as usize]),
         Table::Digit => Ok(DIGIT_TABLE[code as usize]),
         Table::Punct => Ok(PUNCT_TABLE[code as usize]),
-        _ => Err(Exceptions::illegalStateWith("Bad table")),
+        _ => Err(Exceptions::illegal_state_with("Bad table")),
     }
     // switch (table) {
     //   case UPPER:
@@ -336,7 +336,7 @@ fn correct_bits(
     let num_data_codewords = ddata.getNbDatablocks();
     let num_codewords = rawbits.len() / codeword_size;
     if num_codewords < num_data_codewords as usize {
-        return Err(Exceptions::formatWith(format!(
+        return Err(Exceptions::format_with(format!(
             "numCodewords {num_codewords}< numDataCodewords{num_data_codewords}"
         )));
     }
@@ -369,7 +369,7 @@ fn correct_bits(
         // for (int i = 0; i < numDataCodewords; i++) {
         // let data_word = data_words[i];
         if data_word == &0 || data_word == &mask {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
             //throw FormatException.getFormatInstance();
         } else if data_word == &1 || data_word == &(mask - 1) {
             stuffed_bits += 1;
diff --git a/src/aztec/detector.rs b/src/aztec/detector.rs
index 4cbae88..4f49111 100644
--- a/src/aztec/detector.rs
+++ b/src/aztec/detector.rs
@@ -124,7 +124,7 @@ impl<'a> Detector<'_> {
             || !self.is_valid(bulls_eye_corners[2])
             || !self.is_valid(bulls_eye_corners[3])
         {
-            return Err(Exceptions::notFoundWith("no valid points"));
+            return Err(Exceptions::not_found_with("no valid points"));
         }
         let length = 2 * self.nb_center_layers;
         // Get the bits around the bull's eye
@@ -205,7 +205,7 @@ impl<'a> Detector<'_> {
                 return Ok(shift);
             }
         }
-        Err(Exceptions::notFoundWith("rotation failure"))
+        Err(Exceptions::not_found_with("rotation failure"))
     }
 
     /**
@@ -314,7 +314,7 @@ impl<'a> Detector<'_> {
         }
 
         if self.nb_center_layers != 5 && self.nb_center_layers != 7 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         self.compact = self.nb_center_layers == 5;
diff --git a/src/aztec/encoder/aztec_encoder.rs b/src/aztec/encoder/aztec_encoder.rs
index e8b8544..84f9827 100644
--- a/src/aztec/encoder/aztec_encoder.rs
+++ b/src/aztec/encoder/aztec_encoder.rs
@@ -53,7 +53,7 @@ pub const WORD_SIZE: [u32; 33] = [
 pub fn encode_simple(data: &str) -> Result<AztecCode> {
     let Ok(bytes) = encoding::all::ISO_8859_1
         .encode(data, encoding::EncoderTrap::Replace) else {
-            return Err(Exceptions::illegalArgumentWith(format!("'{data}' cannot be encoded as ISO_8859_1")));
+            return Err(Exceptions::illegal_argument_with(format!("'{data}' cannot be encoded as ISO_8859_1")));
         };
     encode_bytes_simple(&bytes)
 }
@@ -71,7 +71,7 @@ pub fn encode(data: &str, minECCPercent: u32, userSpecifiedLayers: i32) -> Resul
     if let Ok(bytes) = encoding::all::ISO_8859_1.encode(data, encoding::EncoderTrap::Strict) {
         encode_bytes(&bytes, minECCPercent, userSpecifiedLayers)
     } else {
-        Err(Exceptions::illegalArgumentWith(format!(
+        Err(Exceptions::illegal_argument_with(format!(
             "'{data}' cannot be encoded as ISO_8859_1"
         )))
     }
@@ -98,7 +98,7 @@ pub fn encode_with_charset(
     if let Ok(bytes) = charset.encode(data, encoding::EncoderTrap::Strict) {
         encode_bytes_with_charset(&bytes, minECCPercent, userSpecifiedLayers, charset)
     } else {
-        Err(Exceptions::illegalArgumentWith(format!(
+        Err(Exceptions::illegal_argument_with(format!(
             "'{data}' cannot be encoded as ISO_8859_1"
         )))
     }
@@ -174,7 +174,7 @@ pub fn encode_bytes_with_charset(
                 MAX_NB_BITS
             })
         {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Illegal value {user_specified_layers} for layers"
             )));
         }
@@ -183,13 +183,13 @@ pub fn encode_bytes_with_charset(
         let usable_bits_in_layers = total_bits_in_layer_var - (total_bits_in_layer_var % word_size);
         stuffed_bits = stuffBits(&bits, word_size as usize)?;
         if stuffed_bits.getSize() as u32 + ecc_bits > usable_bits_in_layers {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Data to large for user specified layer",
             ));
         }
         if compact && stuffed_bits.getSize() as u32 > word_size * 64 {
             // Compact format only allows 64 data words, though C4 can hold more words than that
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Data to large for user specified layer",
             ));
         }
@@ -203,7 +203,7 @@ pub fn encode_bytes_with_charset(
         loop {
             // for (int i = 0; ; i++) {
             if i > MAX_NB_BITS {
-                return Err(Exceptions::illegalArgumentWith(
+                return Err(Exceptions::illegal_argument_with(
                     "Data too large for an Aztec code",
                 ));
             }
@@ -474,7 +474,7 @@ fn getGF(wordSize: usize) -> Result<GenericGFRef> {
         8 => Ok(get_predefined_genericgf(PredefinedGenericGF::AztecData8)),
         10 => Ok(get_predefined_genericgf(PredefinedGenericGF::AztecData10)),
         12 => Ok(get_predefined_genericgf(PredefinedGenericGF::AztecData12)),
-        _ => Err(Exceptions::illegalArgumentWith(format!(
+        _ => Err(Exceptions::illegal_argument_with(format!(
             "Unsupported word size {wordSize}"
         ))),
     }
diff --git a/src/aztec/encoder/high_level_encoder.rs b/src/aztec/encoder/high_level_encoder.rs
index 3c4dde2..148aead 100644
--- a/src/aztec/encoder/high_level_encoder.rs
+++ b/src/aztec/encoder/high_level_encoder.rs
@@ -248,7 +248,7 @@ impl HighLevelEncoder {
                 initial_state = initial_state.appendFLGn(CharacterSetECI::getValue(&eci))?;
             }
         } else {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "No ECI code for character set",
             ));
         }
diff --git a/src/aztec/encoder/state.rs b/src/aztec/encoder/state.rs
index 62a99f5..e90f3ef 100644
--- a/src/aztec/encoder/state.rs
+++ b/src/aztec/encoder/state.rs
@@ -83,7 +83,7 @@ impl State {
             token.add(0, 3); // 0: FNC1
         } else */
         if eci > 999999 {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "ECI code must be between 0 and 999999",
             ));
             // throw new IllegalArgumentException("ECI code must be between 0 and 999999");
@@ -91,7 +91,7 @@ impl State {
             let Ok(eci_digits) = encoding::all::ISO_8859_1
                 .encode(&format!("{eci}"), encoding::EncoderTrap::Strict)
                  else {
-                    return Err(Exceptions::illegalArgument)
+                    return Err(Exceptions::ILLEGAL_ARGUMENT)
                  };
             // let eciDigits = Integer.toString(eci).getBytes(StandardCharsets.ISO_8859_1);
             token.add(eci_digits.len() as i32, 3); // 1-6: number of ECI digits
diff --git a/src/aztec/encoder/token.rs b/src/aztec/encoder/token.rs
index 671ecca..92271ad 100644
--- a/src/aztec/encoder/token.rs
+++ b/src/aztec/encoder/token.rs
@@ -34,7 +34,7 @@ impl TokenType {
         match self {
             TokenType::Simple(a) => a.appendTo(bit_array, text),
             TokenType::BinaryShift(a) => a.appendTo(bit_array, text),
-            TokenType::Empty => Err(Exceptions::illegalStateWith(
+            TokenType::Empty => Err(Exceptions::illegal_state_with(
                 "cannot appendTo on Empty final item",
             )),
         }
diff --git a/src/client/result/AddressBookParsedResult.rs b/src/client/result/AddressBookParsedResult.rs
index dcb6e76..40e98ea 100644
--- a/src/client/result/AddressBookParsedResult.rs
+++ b/src/client/result/AddressBookParsedResult.rs
@@ -121,17 +121,17 @@ impl AddressBookParsedRXingResult {
         geo: Vec<String>,
     ) -> Result<Self> {
         if phone_numbers.len() != phone_types.len() && !phone_types.is_empty() {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Phone numbers and types lengths differ",
             ));
         }
         if emails.len() != email_types.len() && !email_types.is_empty() {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Emails and types lengths differ",
             ));
         }
         if addresses.len() != address_types.len() && !address_types.is_empty() {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Addresses and types lengths differ",
             ));
         }
diff --git a/src/client/result/CalendarParsedResult.rs b/src/client/result/CalendarParsedResult.rs
index ece40fd..928022c 100644
--- a/src/client/result/CalendarParsedResult.rs
+++ b/src/client/result/CalendarParsedResult.rs
@@ -167,7 +167,7 @@ impl CalendarParsedRXingResult {
      */
     fn parseDate(when: String) -> Result<i64> {
         if !DATE_TIME.is_match(&when) {
-            return Err(Exceptions::parseWith(when));
+            return Err(Exceptions::parse_with(when));
         }
         if when.len() == 8 {
             // Show only year/month/day
@@ -178,14 +178,14 @@ impl CalendarParsedRXingResult {
             // http://code.google.com/p/android/issues/detail?id=8330
             return match Utc.datetime_from_str(&format!("{}T000000Z", &when,), date_format_string) {
                 Ok(dtm) => Ok(dtm.timestamp()),
-                Err(e) => Err(Exceptions::parseWith(e.to_string())),
+                Err(e) => Err(Exceptions::parse_with(e.to_string())),
             };
         }
         // The when string can be local time, or UTC if it ends with a Z
-        if when.len() == 16 && when.chars().nth(15).ok_or(Exceptions::indexOutOfBounds)? == 'Z' {
+        if when.len() == 16 && when.chars().nth(15).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? == 'Z' {
             return match Utc.datetime_from_str(&when, "%Y%m%dT%H%M%SZ") {
                 Ok(dtm) => Ok(dtm.with_timezone(&Utc).timestamp()),
-                Err(e) => Err(Exceptions::parseWith(format!("couldn't parse string: {e}"))),
+                Err(e) => Err(Exceptions::parse_with(format!("couldn't parse string: {e}"))),
             };
         }
         // Try once more, with weird tz formatting
@@ -195,14 +195,14 @@ impl CalendarParsedRXingResult {
             let tz_parsed: Tz = match tz_part.parse() {
                 Ok(time_zone) => time_zone,
                 Err(e) => {
-                    return Err(Exceptions::parseWith(format!(
+                    return Err(Exceptions::parse_with(format!(
                         "couldn't parse timezone '{tz_part}': {e}"
                     )))
                 }
             };
             return match Utc.datetime_from_str(time_part, "%Y%m%dT%H%M%S") {
                 Ok(dtm) => Ok(dtm.with_timezone(&tz_parsed).timestamp()),
-                Err(e) => Err(Exceptions::parseWith(format!("couldn't parse string: {e}"))),
+                Err(e) => Err(Exceptions::parse_with(format!("couldn't parse string: {e}"))),
             };
         }
 
@@ -210,7 +210,7 @@ impl CalendarParsedRXingResult {
         if when.len() == 15 {
             return match Utc.datetime_from_str(&when, "%Y%m%dT%H%M%S") {
                 Ok(dtm) => Ok(dtm.timestamp()),
-                Err(e) => Err(Exceptions::parseWith(format!(
+                Err(e) => Err(Exceptions::parse_with(format!(
                     "couldn't parse local time: {e}"
                 ))),
             };
@@ -249,7 +249,7 @@ impl CalendarParsedRXingResult {
                     let z = parseable
                         .as_str()
                         .parse::<i64>()
-                        .map_err(|e| Exceptions::parseWith(e.to_string()))?;
+                        .map_err(|e| Exceptions::parse_with(e.to_string()))?;
                     durationMS += unit * z;
                 }
             }
@@ -274,7 +274,7 @@ impl CalendarParsedRXingResult {
         if let Ok(dtm) = DateTime::parse_from_str(dateTimeString, "%Y%m%dT%H%M%S") {
             Ok(dtm.timestamp())
         } else {
-            Err(Exceptions::parseWith(format!(
+            Err(Exceptions::parse_with(format!(
                 "Couldn't parse {dateTimeString}"
             )))
         }
diff --git a/src/client/result/ResultParser.rs b/src/client/result/ResultParser.rs
index 8da188f..32f9356 100644
--- a/src/client/result/ResultParser.rs
+++ b/src/client/result/ResultParser.rs
@@ -300,7 +300,7 @@ pub fn urlDecode(encoded: &str) -> Result<String> {
     if let Ok(decoded) = decode(encoded) {
         Ok(decoded.to_string())
     } else {
-        Err(Exceptions::illegalStateWith("UnsupportedEncodingException"))
+        Err(Exceptions::illegal_state_with("UnsupportedEncodingException"))
     }
 }
 
diff --git a/src/client/result/VINResultParser.rs b/src/client/result/VINResultParser.rs
index 6c25925..5fa1fb7 100644
--- a/src/client/result/VINResultParser.rs
+++ b/src/client/result/VINResultParser.rs
@@ -72,9 +72,9 @@ fn check_checksum(vin: &str) -> Result<bool> {
     let mut sum = 0;
     for i in 0..vin.len() {
         sum += vin_position_weight(i + 1)? as u32
-            * vin_char_value(vin.chars().nth(i).ok_or(Exceptions::illegalArgument)?)?;
+            * vin_char_value(vin.chars().nth(i).ok_or(Exceptions::ILLEGAL_ARGUMENT)?)?;
     }
-    let check_to_char = vin.chars().nth(8).ok_or(Exceptions::illegalArgument)?;
+    let check_to_char = vin.chars().nth(8).ok_or(Exceptions::ILLEGAL_ARGUMENT)?;
     let expected_check_char = check_char((sum % 11) as u8)?;
     Ok(check_to_char == expected_check_char)
 }
@@ -85,7 +85,7 @@ fn vin_char_value(c: char) -> Result<u32> {
         'J'..='R' => Ok((c as u8 as u32 - b'J' as u32) + 1),
         'S'..='Z' => Ok((c as u8 as u32 - b'S' as u32) + 2),
         '0'..='9' => Ok(c as u8 as u32 - b'0' as u32),
-        _ => Err(Exceptions::illegalArgumentWith("vin char out of range")),
+        _ => Err(Exceptions::illegal_argument_with("vin char out of range")),
     }
 }
 
@@ -95,7 +95,7 @@ fn vin_position_weight(position: usize) -> Result<usize> {
         8 => Ok(10),
         9 => Ok(0),
         10..=17 => Ok(19 - position),
-        _ => Err(Exceptions::illegalArgumentWith(
+        _ => Err(Exceptions::illegal_argument_with(
             "vin position weight out of bounds",
         )),
     }
@@ -105,7 +105,7 @@ fn check_char(remainder: u8) -> Result<char> {
     match remainder {
         0..=9 => Ok((b'0' + remainder) as char),
         10 => Ok('X'),
-        _ => Err(Exceptions::illegalArgumentWith("remainder too high")),
+        _ => Err(Exceptions::illegal_argument_with("remainder too high")),
     }
 }
 
@@ -118,7 +118,7 @@ fn model_year(c: char) -> Result<u32> {
         'V'..='Y' => Ok((c as u8 as u32 - b'V' as u32) + 1997),
         '1'..='9' => Ok((c as u8 as u32 - b'1' as u32) + 2001),
         'A'..='D' => Ok((c as u8 as u32 - b'A' as u32) + 2010),
-        _ => Err(Exceptions::illegalArgumentWith(
+        _ => Err(Exceptions::illegal_argument_with(
             "model year argument out of range",
         )),
     }
diff --git a/src/common/bit_array.rs b/src/common/bit_array.rs
index 471c4a8..cd6fabc 100644
--- a/src/common/bit_array.rs
+++ b/src/common/bit_array.rs
@@ -169,7 +169,7 @@ impl BitArray {
     pub fn setRange(&mut self, start: usize, end: usize) -> Result<()> {
         let mut end = end;
         if end < start || end > self.size {
-            return Err(Exceptions::illegalArgument);
+            return Err(Exceptions::ILLEGAL_ARGUMENT);
         }
         if end == start {
             return Ok(());
@@ -212,7 +212,7 @@ impl BitArray {
     pub fn isRange(&self, start: usize, end: usize, value: bool) -> Result<bool> {
         let mut end = end;
         if end < start || end > self.size {
-            return Err(Exceptions::illegalArgument);
+            return Err(Exceptions::ILLEGAL_ARGUMENT);
         }
         if end == start {
             return Ok(true); // empty range matches
@@ -254,7 +254,7 @@ impl BitArray {
      */
     pub fn appendBits(&mut self, value: u32, num_bits: usize) -> Result<()> {
         if num_bits > 32 {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "num bits must be between 0 and 32",
             ));
         }
@@ -287,7 +287,7 @@ impl BitArray {
 
     pub fn xor(&mut self, other: &BitArray) -> Result<()> {
         if self.size != other.size {
-            return Err(Exceptions::illegalArgumentWith("Sizes don't match"));
+            return Err(Exceptions::illegal_argument_with("Sizes don't match"));
         }
         for i in 0..self.bits.len() {
             //for (int i = 0; i < bits.length; i++) {
diff --git a/src/common/bit_matrix.rs b/src/common/bit_matrix.rs
index 7f1e7a4..8c9a4d5 100644
--- a/src/common/bit_matrix.rs
+++ b/src/common/bit_matrix.rs
@@ -66,7 +66,7 @@ impl BitMatrix {
      */
     pub fn new(width: u32, height: u32) -> Result<Self> {
         if width < 1 || height < 1 {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Both dimensions must be greater than 0",
             ));
         }
@@ -138,12 +138,12 @@ impl BitMatrix {
             if string_representation
                 .chars()
                 .nth(pos)
-                .ok_or(Exceptions::illegalState)?
+                .ok_or(Exceptions::ILLEGAL_STATE)?
                 == '\n'
                 || string_representation
                     .chars()
                     .nth(pos)
-                    .ok_or(Exceptions::illegalState)?
+                    .ok_or(Exceptions::ILLEGAL_STATE)?
                     == '\r'
             {
                 if bitsPos > rowStartPos {
@@ -152,7 +152,7 @@ impl BitMatrix {
                         first_run = false;
                         rowLength = bitsPos - rowStartPos;
                     } else if bitsPos - rowStartPos != rowLength {
-                        return Err(Exceptions::illegalArgumentWith("row lengths do not match"));
+                        return Err(Exceptions::illegal_argument_with("row lengths do not match"));
                     }
                     rowStartPos = bitsPos;
                     nRows += 1;
@@ -167,7 +167,7 @@ impl BitMatrix {
                 bits[bitsPos] = false;
                 bitsPos += 1;
             } else {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "illegal character encountered: {}",
                     string_representation[pos..].to_owned()
                 )));
@@ -181,7 +181,7 @@ impl BitMatrix {
                 // first_run = false;
                 rowLength = bitsPos - rowStartPos;
             } else if bitsPos - rowStartPos != rowLength {
-                return Err(Exceptions::illegalArgumentWith("row lengths do not match"));
+                return Err(Exceptions::illegal_argument_with("row lengths do not match"));
             }
             nRows += 1;
         }
@@ -308,7 +308,7 @@ impl BitMatrix {
     pub fn xor(&mut self, mask: &BitMatrix) -> Result<()> {
         if self.width != mask.width || self.height != mask.height || self.row_size != mask.row_size
         {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "input matrix dimensions do not match",
             ));
         }
@@ -354,14 +354,14 @@ impl BitMatrix {
         //     ));
         // }
         if height < 1 || width < 1 {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "height and width must be at least 1",
             ));
         }
         let right = left + width;
         let bottom = top + height;
         if bottom > self.height || right > self.width {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "the region must fit inside the matrix",
             ));
         }
@@ -435,7 +435,7 @@ impl BitMatrix {
                 self.rotate180();
                 Ok(())
             }
-            _ => Err(Exceptions::illegalArgumentWith(
+            _ => Err(Exceptions::illegal_argument_with(
                 "degrees must be a multiple of 0, 90, 180, or 270",
             )),
         }
diff --git a/src/common/bit_source.rs b/src/common/bit_source.rs
index ae97e48..7e10f4e 100644
--- a/src/common/bit_source.rs
+++ b/src/common/bit_source.rs
@@ -71,7 +71,7 @@ impl BitSource {
      */
     pub fn readBits(&mut self, numBits: usize) -> Result<u32> {
         if !(1..=32).contains(&numBits) || numBits > self.available() {
-            return Err(Exceptions::illegalArgumentWith(numBits.to_string()));
+            return Err(Exceptions::illegal_argument_with(numBits.to_string()));
         }
 
         let mut result: u32 = 0;
diff --git a/src/common/character_set_eci.rs b/src/common/character_set_eci.rs
index 0d08479..61b607a 100644
--- a/src/common/character_set_eci.rs
+++ b/src/common/character_set_eci.rs
@@ -245,7 +245,7 @@ impl CharacterSetECI {
             28 => Ok(CharacterSetECI::Big5),
             29 => Ok(CharacterSetECI::GB18030),
             30 => Ok(CharacterSetECI::EUC_KR),
-            _ => Err(Exceptions::notFoundWith("Bad ECI Value")),
+            _ => Err(Exceptions::not_found_with("Bad ECI Value")),
         }
     }
 
diff --git a/src/common/default_grid_sampler.rs b/src/common/default_grid_sampler.rs
index 96886f7..55e9d4b 100644
--- a/src/common/default_grid_sampler.rs
+++ b/src/common/default_grid_sampler.rs
@@ -68,7 +68,7 @@ impl GridSampler for DefaultGridSampler {
         transform: &PerspectiveTransform,
     ) -> Result<BitMatrix> {
         if dimensionX == 0 || dimensionY == 0 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         let mut bits = BitMatrix::new(dimensionX, dimensionY)?;
         let mut points = vec![0.0; 2 * dimensionX as usize];
@@ -99,7 +99,7 @@ impl GridSampler for DefaultGridSampler {
                 // }
                 if image
                     .try_get(points[x] as u32, points[x + 1] as u32)
-                    .ok_or(Exceptions::notFoundWith(
+                    .ok_or(Exceptions::not_found_with(
                         "index out of bounds, see documentation in file for explanation",
                     ))?
                 {
diff --git a/src/common/detector/monochrome_rectangle_detector.rs b/src/common/detector/monochrome_rectangle_detector.rs
index c7dfc86..bf9f2ef 100644
--- a/src/common/detector/monochrome_rectangle_detector.rs
+++ b/src/common/detector/monochrome_rectangle_detector.rs
@@ -203,13 +203,13 @@ impl<'a> MonochromeRectangleDetector<'_> {
                     }
                 }
             } else {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             lastRange_z = range;
             y += deltaY;
             x += deltaX
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     /**
diff --git a/src/common/detector/white_rectangle_detector.rs b/src/common/detector/white_rectangle_detector.rs
index bb53065..d705387 100644
--- a/src/common/detector/white_rectangle_detector.rs
+++ b/src/common/detector/white_rectangle_detector.rs
@@ -78,7 +78,7 @@ impl<'a> WhiteRectangleDetector<'_> {
             || downInit >= image.getHeight() as i32
             || rightInit >= image.getWidth() as i32
         {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         Ok(WhiteRectangleDetector {
@@ -224,7 +224,7 @@ impl<'a> WhiteRectangleDetector<'_> {
             }
 
             if z.is_none() {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
 
             let mut t: Option<Point> = None;
@@ -242,7 +242,7 @@ impl<'a> WhiteRectangleDetector<'_> {
             }
 
             if t.is_none() {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
 
             let mut x: Option<Point> = None;
@@ -260,7 +260,7 @@ impl<'a> WhiteRectangleDetector<'_> {
             }
 
             if x.is_none() {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
 
             let mut y: Option<Point> = None;
@@ -278,12 +278,12 @@ impl<'a> WhiteRectangleDetector<'_> {
             }
 
             if y.is_none() {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
 
             Ok(self.center_edges(y.unwrap(), z.unwrap(), x.unwrap(), t.unwrap()))
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 
diff --git a/src/common/global_histogram_binarizer.rs b/src/common/global_histogram_binarizer.rs
index 82f2091..1292ef5 100644
--- a/src/common/global_histogram_binarizer.rs
+++ b/src/common/global_histogram_binarizer.rs
@@ -234,7 +234,7 @@ impl GlobalHistogramBinarizer {
         // If there is too little contrast in the image to pick a meaningful black point, throw rather
         // than waste time trying to decode the image, and risk false positives.
         if secondPeak - firstPeak <= numBuckets / 16 {
-            return Err(Exceptions::notFoundWith(
+            return Err(Exceptions::not_found_with(
                 "secondPeak - firstPeak <= numBuckets / 16 ",
             ));
         }
diff --git a/src/common/grid_sampler.rs b/src/common/grid_sampler.rs
index f5cee06..6477f1f 100644
--- a/src/common/grid_sampler.rs
+++ b/src/common/grid_sampler.rs
@@ -146,7 +146,7 @@ pub trait GridSampler {
             let x = points[offset] as i32;
             let y = points[offset + 1] as i32;
             if x < -1 || x > width as i32 || y < -1 || y > height as i32 {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             nudged = false;
             if x == -1 {
@@ -173,7 +173,7 @@ pub trait GridSampler {
             let x = points[offset as usize] as i32;
             let y = points[offset as usize + 1] as i32;
             if x < -1 || x > width as i32 || y < -1 || y > height as i32 {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             nudged = false;
             if x == -1 {
diff --git a/src/common/minimal_eci_input.rs b/src/common/minimal_eci_input.rs
index 881b18f..b6b9cc1 100644
--- a/src/common/minimal_eci_input.rs
+++ b/src/common/minimal_eci_input.rs
@@ -68,10 +68,10 @@ impl ECIInput for MinimalECIInput {
      */
     fn charAt(&self, index: usize) -> Result<char> {
         if index >= self.length() {
-            return Err(Exceptions::indexOutOfBoundsWith(index.to_string()));
+            return Err(Exceptions::index_out_of_bounds_with(index.to_string()));
         }
         if self.isECI(index as u32)? {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "value at {index} is not a character but an ECI"
             )));
         }
@@ -104,13 +104,13 @@ impl ECIInput for MinimalECIInput {
      */
     fn subSequence(&self, start: usize, end: usize) -> Result<Vec<char>> {
         if start > end || end > self.length() {
-            return Err(Exceptions::indexOutOfBounds);
+            return Err(Exceptions::INDEX_OUT_OF_BOUNDS);
         }
         let mut result = String::new();
         for i in start..end {
             //   for (int i = start; i < end; i++) {
             if self.isECI(i as u32)? {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "value at {i} is not a character but an ECI"
                 )));
             }
@@ -132,7 +132,7 @@ impl ECIInput for MinimalECIInput {
      */
     fn isECI(&self, index: u32) -> Result<bool> {
         if index >= self.length() as u32 {
-            return Err(Exceptions::indexOutOfBounds);
+            return Err(Exceptions::INDEX_OUT_OF_BOUNDS);
         }
         Ok(self.bytes[index as usize] > 255) // && self.bytes[index as usize] <= u16::MAX)
     }
@@ -157,10 +157,10 @@ impl ECIInput for MinimalECIInput {
      */
     fn getECIValue(&self, index: usize) -> Result<i32> {
         if index >= self.length() {
-            return Err(Exceptions::indexOutOfBounds);
+            return Err(Exceptions::INDEX_OUT_OF_BOUNDS);
         }
         if !self.isECI(index as u32)? {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "value at {index} is not an ECI but a character"
             )));
         }
@@ -249,7 +249,7 @@ impl MinimalECIInput {
      */
     pub fn isFNC1(&self, index: usize) -> Result<bool> {
         if index >= self.length() {
-            return Err(Exceptions::indexOutOfBounds);
+            return Err(Exceptions::INDEX_OUT_OF_BOUNDS);
         }
         Ok(self.bytes[index] == 1000)
     }
diff --git a/src/common/otsu_level_binarizer.rs b/src/common/otsu_level_binarizer.rs
index 2fbe692..bcd5921 100644
--- a/src/common/otsu_level_binarizer.rs
+++ b/src/common/otsu_level_binarizer.rs
@@ -20,7 +20,7 @@ impl OtsuLevelBinarizer {
     fn generate_threshold_matrix(source: &dyn LuminanceSource) -> Result<BitMatrix> {
         let image_buffer = {
             let Some(buff) : Option<ImageBuffer<Luma<u8>,Vec<u8>>> = ImageBuffer::from_vec(source.getWidth() as u32, source.getHeight() as u32, source.getMatrix()) else {
-                return Err(Exceptions::illegalArgument)
+                return Err(Exceptions::ILLEGAL_ARGUMENT)
             };
             buff
         };
diff --git a/src/common/reedsolomon/generic_gf.rs b/src/common/reedsolomon/generic_gf.rs
index a7e0628..d512a2e 100644
--- a/src/common/reedsolomon/generic_gf.rs
+++ b/src/common/reedsolomon/generic_gf.rs
@@ -134,7 +134,7 @@ impl GenericGF {
      */
     pub fn log(&self, a: i32) -> Result<i32> {
         if a == 0 {
-            return Err(Exceptions::illegalArgument);
+            return Err(Exceptions::ILLEGAL_ARGUMENT);
         }
         // let pos: usize = a.try_into().unwrap();
         Ok(self.logTable[a as usize])
@@ -145,7 +145,7 @@ impl GenericGF {
      */
     pub fn inverse(&self, a: i32) -> Result<i32> {
         if a == 0 {
-            return Err(Exceptions::arithmetic);
+            return Err(Exceptions::ARITHMETIC);
         }
         let log_t_loc: usize = a as usize;
         let loc: usize = ((self.size as i32) - self.logTable[log_t_loc] - 1) as usize;
diff --git a/src/common/reedsolomon/generic_gf_poly.rs b/src/common/reedsolomon/generic_gf_poly.rs
index 0c6ee12..ad6a3c5 100644
--- a/src/common/reedsolomon/generic_gf_poly.rs
+++ b/src/common/reedsolomon/generic_gf_poly.rs
@@ -50,7 +50,7 @@ impl GenericGFPoly {
      */
     pub fn new(field: GenericGFRef, coefficients: &[i32]) -> Result<Self> {
         if coefficients.is_empty() {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "coefficients cannot be empty",
             ));
         }
@@ -141,7 +141,7 @@ impl GenericGFPoly {
 
     pub fn addOrSubtract(&self, other: &GenericGFPoly) -> Result<GenericGFPoly> {
         if self.field != other.field {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "GenericGFPolys do not have same GenericGF field",
             ));
         }
@@ -178,7 +178,7 @@ impl GenericGFPoly {
     pub fn multiply(&self, other: &GenericGFPoly) -> Result<GenericGFPoly> {
         if self.field != other.field {
             //if (!field.equals(other.field)) {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "GenericGFPolys do not have same GenericGF field",
             ));
         }
@@ -246,12 +246,12 @@ impl GenericGFPoly {
 
     pub fn divide(&self, other: &GenericGFPoly) -> Result<(GenericGFPoly, GenericGFPoly)> {
         if self.field != other.field {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "GenericGFPolys do not have same GenericGF field",
             ));
         }
         if other.isZero() {
-            return Err(Exceptions::illegalArgumentWith("Divide by 0"));
+            return Err(Exceptions::illegal_argument_with("Divide by 0"));
         }
 
         let mut quotient = self.getZero();
@@ -260,7 +260,7 @@ impl GenericGFPoly {
         let denominator_leading_term = other.getCoefficient(other.getDegree());
         let inverse_denominator_leading_term = match self.field.inverse(denominator_leading_term) {
             Ok(val) => val,
-            Err(_issue) => return Err(Exceptions::illegalArgumentWith("arithmetic issue")),
+            Err(_issue) => return Err(Exceptions::illegal_argument_with("arithmetic issue")),
         };
 
         while remainder.getDegree() >= other.getDegree() && !remainder.isZero() {
diff --git a/src/common/reedsolomon/reedsolomon_decoder.rs b/src/common/reedsolomon/reedsolomon_decoder.rs
index 50a0c5e..ccc056f 100644
--- a/src/common/reedsolomon/reedsolomon_decoder.rs
+++ b/src/common/reedsolomon/reedsolomon_decoder.rs
@@ -78,7 +78,7 @@ impl ReedSolomonDecoder {
             return Ok(0);
         }
         let Ok(syndrome) = GenericGFPoly::new(self.field, &syndromeCoefficients) else {
-             return Err(Exceptions::reedSolomon);
+             return Err(Exceptions::REED_SOLOMON);
         };
         let sigmaOmega = self.runEuclideanAlgorithm(
             &GenericGF::buildMonomial(self.field, twoS as usize, 1),
@@ -93,11 +93,11 @@ impl ReedSolomonDecoder {
             //for (int i = 0; i < errorLocations.length; i++) {
             let log_value = self.field.log(errorLocations[i] as i32)?;
             if log_value > received.len() as i32 - 1 {
-                return Err(Exceptions::reedSolomonWith("Bad error location"));
+                return Err(Exceptions::reed_solomon_with("Bad error location"));
             }
             let position: isize = received.len() as isize - 1 - log_value as isize;
             if position < 0 {
-                return Err(Exceptions::reedSolomonWith("Bad error location"));
+                return Err(Exceptions::reed_solomon_with("Bad error location"));
             }
             received[position as usize] =
                 GenericGF::addOrSubtract(received[position as usize], errorMagnitudes[i]);
@@ -135,7 +135,7 @@ impl ReedSolomonDecoder {
             // Divide rLastLast by rLast, with quotient in q and remainder in r
             if rLast.isZero() {
                 // Oops, Euclidean algorithm already terminated?
-                return Err(Exceptions::reedSolomonWith("r_{i-1} was zero"));
+                return Err(Exceptions::reed_solomon_with("r_{i-1} was zero"));
             }
             r = rLastLast;
             let mut q = r.getZero();
@@ -153,7 +153,7 @@ impl ReedSolomonDecoder {
             t = (q.multiply(&tLast)?).addOrSubtract(&tLastLast)?;
 
             if r.getDegree() >= rLast.getDegree() {
-                return Err(Exceptions::reedSolomonWith(format!(
+                return Err(Exceptions::reed_solomon_with(format!(
                     "Division algorithm failed to reduce polynomial? r: {r}, rLast: {rLast}"
                 )));
             }
@@ -161,12 +161,12 @@ impl ReedSolomonDecoder {
 
         let sigmaTildeAtZero = t.getCoefficient(0);
         if sigmaTildeAtZero == 0 {
-            return Err(Exceptions::reedSolomonWith("sigmaTilde(0) was zero"));
+            return Err(Exceptions::reed_solomon_with("sigmaTilde(0) was zero"));
         }
 
         let inverse = match self.field.inverse(sigmaTildeAtZero) {
             Ok(res) => res,
-            Err(_err) => return Err(Exceptions::reedSolomonWith("ArithmetricException")),
+            Err(_err) => return Err(Exceptions::reed_solomon_with("ArithmetricException")),
         };
         let sigma = t.multiply_with_scalar(inverse);
         let omega = r.multiply_with_scalar(inverse);
@@ -194,7 +194,7 @@ impl ReedSolomonDecoder {
             }
         }
         if e != numErrors {
-            return Err(Exceptions::reedSolomonWith(
+            return Err(Exceptions::reed_solomon_with(
                 "Error locator degree does not match number of roots",
             ));
         }
diff --git a/src/common/reedsolomon/reedsolomon_encoder.rs b/src/common/reedsolomon/reedsolomon_encoder.rs
index 1b54556..bcc027e 100644
--- a/src/common/reedsolomon/reedsolomon_encoder.rs
+++ b/src/common/reedsolomon/reedsolomon_encoder.rs
@@ -74,11 +74,11 @@ impl ReedSolomonEncoder {
 
     pub fn encode(&mut self, to_encode: &mut Vec<i32>, ec_bytes: usize) -> Result<()> {
         if ec_bytes == 0 {
-            return Err(Exceptions::illegalArgumentWith("No error correction bytes"));
+            return Err(Exceptions::illegal_argument_with("No error correction bytes"));
         }
         let data_bytes = to_encode.len() - ec_bytes;
         if data_bytes == 0 {
-            return Err(Exceptions::illegalArgumentWith("No data bytes provided"));
+            return Err(Exceptions::illegal_argument_with("No data bytes provided"));
         }
         let fld = self.field;
         let generator = self.buildGenerator(ec_bytes);
@@ -87,7 +87,7 @@ impl ReedSolomonEncoder {
         //System.arraycopy(toEncode, 0, infoCoefficients, 0, dataBytes);
         let mut info = GenericGFPoly::new(fld, &info_coefficients)?;
         info = info.multiply_by_monomial(ec_bytes, 1)?;
-        let remainder = &info.divide(generator.ok_or(Exceptions::reedSolomon)?)?.1;
+        let remainder = &info.divide(generator.ok_or(Exceptions::REED_SOLOMON)?)?.1;
         let coefficients = remainder.getCoefficients();
         let num_zero_coefficients = ec_bytes - coefficients.len();
         for i in 0..num_zero_coefficients {
diff --git a/src/datamatrix/data_matrix_reader.rs b/src/datamatrix/data_matrix_reader.rs
index ae16eed..4c1f845 100644
--- a/src/datamatrix/data_matrix_reader.rs
+++ b/src/datamatrix/data_matrix_reader.rs
@@ -102,7 +102,7 @@ impl Reader for DataMatrixReader {
                     DECODER.decode(&bits)?
                 }
             } else {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             };
 
             // decoderRXingResult = DECODER.decode(detectorRXingResult.getBits())?;
@@ -178,10 +178,10 @@ impl DataMatrixReader {
      */
     fn extractPureBits(&self, image: &BitMatrix) -> Result<BitMatrix> {
         let Some(leftTopBlack) = image.getTopLeftOnBit() else {
-      return Err(Exceptions::notFound)
+      return Err(Exceptions::NOT_FOUND)
     };
         let Some(rightBottomBlack) = image.getBottomRightOnBit()else {
-      return Err(Exceptions::notFound)
+      return Err(Exceptions::NOT_FOUND)
     };
 
         let moduleSize = Self::moduleSize(&leftTopBlack, image)?;
@@ -194,7 +194,7 @@ impl DataMatrixReader {
         let matrixWidth = (right as i32 - left as i32 + 1) / moduleSize as i32;
         let matrixHeight = (bottom as i32 - top as i32 + 1) / moduleSize as i32;
         if matrixWidth <= 0 || matrixHeight <= 0 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
             // throw NotFoundException.getNotFoundInstance();
         }
 
@@ -231,12 +231,12 @@ impl DataMatrixReader {
             x += 1;
         }
         if x == width {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let moduleSize = x - leftTopBlack[0];
         if moduleSize == 0 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         Ok(moduleSize)
diff --git a/src/datamatrix/data_matrix_writer.rs b/src/datamatrix/data_matrix_writer.rs
index c060f95..cafffb9 100644
--- a/src/datamatrix/data_matrix_writer.rs
+++ b/src/datamatrix/data_matrix_writer.rs
@@ -61,17 +61,17 @@ impl Writer for DataMatrixWriter {
         hints: &crate::EncodingHintDictionary,
     ) -> Result<crate::common::BitMatrix> {
         if contents.is_empty() {
-            return Err(Exceptions::illegalArgumentWith("Found empty contents"));
+            return Err(Exceptions::illegal_argument_with("Found empty contents"));
         }
 
         if format != &BarcodeFormat::DATA_MATRIX {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Can only encode DATA_MATRIX, but got {format:?}"
             )));
         }
 
         if width < 0 || height < 0 {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Requested dimensions can't be negative: {width}x{height}"
             )));
         }
@@ -122,7 +122,7 @@ impl Writer for DataMatrixWriter {
             if hasEncodingHint {
                 let Some(EncodeHintValue::CharacterSet(char_set_name)) =
                     hints.get(&EncodeHintType::CHARACTER_SET) else {
-                      return Err(Exceptions::illegalArgumentWith("charset does not exist"))
+                      return Err(Exceptions::illegal_argument_with("charset does not exist"))
                     };
                 charset = encoding::label::encoding_from_whatwg_label(char_set_name);
                 // charset = Charset.forName(hints.get(EncodeHintType.CHARACTER_SET).toString());
@@ -156,7 +156,7 @@ impl Writer for DataMatrixWriter {
 
         let symbol_lookup = SymbolInfoLookup::new();
         let Some(symbolInfo) = symbol_lookup.lookup_with_codewords_shape_size_fail(encoded.chars().count() as u32, *shape, &minSize, &maxSize, true)? else {
-      return Err(Exceptions::notFoundWith("symbol info is bad"))
+      return Err(Exceptions::not_found_with("symbol info is bad"))
     };
 
         //2. step: ECC generation
diff --git a/src/datamatrix/decoder/bit_matrix_parser.rs b/src/datamatrix/decoder/bit_matrix_parser.rs
index f38845f..9988e60 100644
--- a/src/datamatrix/decoder/bit_matrix_parser.rs
+++ b/src/datamatrix/decoder/bit_matrix_parser.rs
@@ -37,7 +37,7 @@ impl BitMatrixParser {
     pub fn new(bitMatrix: &BitMatrix) -> Result<Self> {
         let dimension = bitMatrix.getHeight();
         if !(8..=144).contains(&dimension) || (dimension & 0x01) != 0 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
 
         let version = Self::readVersion(bitMatrix)?;
@@ -181,7 +181,7 @@ impl BitMatrixParser {
         }
 
         if resultOffset != self.version.getTotalCodewords() as usize {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
 
         Ok(result)
@@ -456,7 +456,7 @@ impl BitMatrixParser {
         let symbolSizeColumns = version.getSymbolSizeColumns();
 
         if bitMatrix.getHeight() != symbolSizeRows {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Dimension of bitMatrix must match the version size",
             ));
         }
diff --git a/src/datamatrix/decoder/data_block.rs b/src/datamatrix/decoder/data_block.rs
index 2f3ea05..6fdc9b1 100644
--- a/src/datamatrix/decoder/data_block.rs
+++ b/src/datamatrix/decoder/data_block.rs
@@ -139,7 +139,7 @@ impl DataBlock {
         }
 
         if rawCodewordsOffset != rawCodewords.len() {
-            return Err(Exceptions::illegalArgument);
+            return Err(Exceptions::ILLEGAL_ARGUMENT);
         }
 
         Ok(result)
diff --git a/src/datamatrix/decoder/decoded_bit_stream_parser.rs b/src/datamatrix/decoder/decoded_bit_stream_parser.rs
index 455e313..4488cfc 100644
--- a/src/datamatrix/decoder/decoded_bit_stream_parser.rs
+++ b/src/datamatrix/decoder/decoded_bit_stream_parser.rs
@@ -158,7 +158,7 @@ pub fn decode(bytes: &[u8], is_flipped: bool) -> Result<DecoderRXingResult> {
                 isECIencoded = true; // ECI detection only, atm continue decoding as ASCII
                 mode = Mode::ASCII_ENCODE;
             }
-            _ => return Err(Exceptions::format),
+            _ => return Err(Exceptions::FORMAT),
         }
 
         if !(mode != Mode::PAD_ENCODE && bits.available() > 0) {
@@ -225,14 +225,14 @@ fn decodeAsciiSegment(
     loop {
         let mut oneByte = bits.readBits(8)?;
         match oneByte {
-            0 => return Err(Exceptions::format),
+            0 => return Err(Exceptions::FORMAT),
             1..=128 => {
                 // ASCII data (ASCII value + 1)
                 if upperShift {
                     oneByte += 128;
                     //upperShift = false;
                 }
-                result.append_char(char::from_u32(oneByte - 1).ok_or(Exceptions::parse)?);
+                result.append_char(char::from_u32(oneByte - 1).ok_or(Exceptions::PARSE)?);
                 return Ok(Mode::ASCII_ENCODE);
             }
             129 => return Ok(Mode::PAD_ENCODE), // Pad
@@ -278,7 +278,7 @@ fn decodeAsciiSegment(
                 if !firstCodeword
                 // Must be first ISO 16022:2006 5.6.1
                 {
-                    return Err(Exceptions::formatWith(
+                    return Err(Exceptions::format_with(
                         "structured append tag must be first code word",
                     ));
                 }
@@ -331,7 +331,7 @@ fn decodeAsciiSegment(
                 // Not to be used in ASCII encodation
                 // but work around encoders that end with 254, latch back to ASCII
                 if oneByte != 254 || bits.available() != 0 {
-                    return Err(Exceptions::format);
+                    return Err(Exceptions::FORMAT);
                 }
             }
         }
@@ -385,22 +385,22 @@ fn decodeC40Segment(
                         let c40char = C40_BASIC_SET_CHARS[cValue as usize];
                         if upperShift {
                             result.append_char(
-                                char::from_u32(c40char as u32 + 128).ok_or(Exceptions::parse)?,
+                                char::from_u32(c40char as u32 + 128).ok_or(Exceptions::PARSE)?,
                             );
                             upperShift = false;
                         } else {
                             result.append_char(c40char);
                         }
                     } else {
-                        return Err(Exceptions::format);
+                        return Err(Exceptions::FORMAT);
                     }
                 }
                 1 => {
                     if upperShift {
-                        result.append_char(char::from_u32(cValue + 128).ok_or(Exceptions::parse)?);
+                        result.append_char(char::from_u32(cValue + 128).ok_or(Exceptions::PARSE)?);
                         upperShift = false;
                     } else {
-                        result.append_char(char::from_u32(cValue).ok_or(Exceptions::parse)?);
+                        result.append_char(char::from_u32(cValue).ok_or(Exceptions::PARSE)?);
                     }
                     shift = 0;
                 }
@@ -409,7 +409,7 @@ fn decodeC40Segment(
                         let c40char = C40_SHIFT2_SET_CHARS[cValue as usize];
                         if upperShift {
                             result.append_char(
-                                char::from_u32(c40char as u32 + 128).ok_or(Exceptions::parse)?,
+                                char::from_u32(c40char as u32 + 128).ok_or(Exceptions::PARSE)?,
                             );
                             upperShift = false;
                         } else {
@@ -428,22 +428,22 @@ fn decodeC40Segment(
                                 upperShift = true
                             }
 
-                            _ => return Err(Exceptions::format),
+                            _ => return Err(Exceptions::FORMAT),
                         }
                     }
                     shift = 0;
                 }
                 3 => {
                     if upperShift {
-                        result.append_char(char::from_u32(cValue + 224).ok_or(Exceptions::parse)?);
+                        result.append_char(char::from_u32(cValue + 224).ok_or(Exceptions::PARSE)?);
                         upperShift = false;
                     } else {
-                        result.append_char(char::from_u32(cValue + 96).ok_or(Exceptions::parse)?);
+                        result.append_char(char::from_u32(cValue + 96).ok_or(Exceptions::PARSE)?);
                     }
                     shift = 0;
                 }
 
-                _ => return Err(Exceptions::format),
+                _ => return Err(Exceptions::FORMAT),
             }
         }
         if bits.available() == 0 {
@@ -492,22 +492,22 @@ fn decodeTextSegment(
                         let textChar = TEXT_BASIC_SET_CHARS[cValue as usize];
                         if upperShift {
                             result.append_char(
-                                char::from_u32(textChar as u32 + 128).ok_or(Exceptions::parse)?,
+                                char::from_u32(textChar as u32 + 128).ok_or(Exceptions::PARSE)?,
                             );
                             upperShift = false;
                         } else {
                             result.append_char(textChar);
                         }
                     } else {
-                        return Err(Exceptions::format);
+                        return Err(Exceptions::FORMAT);
                     }
                 }
                 1 => {
                     if upperShift {
-                        result.append_char(char::from_u32(cValue + 128).ok_or(Exceptions::parse)?);
+                        result.append_char(char::from_u32(cValue + 128).ok_or(Exceptions::PARSE)?);
                         upperShift = false;
                     } else {
-                        result.append_char(char::from_u32(cValue).ok_or(Exceptions::parse)?);
+                        result.append_char(char::from_u32(cValue).ok_or(Exceptions::PARSE)?);
                     }
                     shift = 0;
                 }
@@ -518,7 +518,7 @@ fn decodeTextSegment(
                         let textChar = TEXT_SHIFT2_SET_CHARS[cValue as usize];
                         if upperShift {
                             result.append_char(
-                                char::from_u32(textChar as u32 + 128).ok_or(Exceptions::parse)?,
+                                char::from_u32(textChar as u32 + 128).ok_or(Exceptions::PARSE)?,
                             );
                             upperShift = false;
                         } else {
@@ -537,7 +537,7 @@ fn decodeTextSegment(
                                 upperShift = true
                             }
 
-                            _ => return Err(Exceptions::format),
+                            _ => return Err(Exceptions::FORMAT),
                         }
                     }
                     shift = 0;
@@ -547,7 +547,7 @@ fn decodeTextSegment(
                         let textChar = TEXT_SHIFT3_SET_CHARS[cValue as usize];
                         if upperShift {
                             result.append_char(
-                                char::from_u32(textChar as u32 + 128).ok_or(Exceptions::parse)?,
+                                char::from_u32(textChar as u32 + 128).ok_or(Exceptions::PARSE)?,
                             );
                             upperShift = false;
                         } else {
@@ -555,11 +555,11 @@ fn decodeTextSegment(
                         }
                         shift = 0;
                     } else {
-                        return Err(Exceptions::format);
+                        return Err(Exceptions::FORMAT);
                     }
                 }
 
-                _ => return Err(Exceptions::format),
+                _ => return Err(Exceptions::FORMAT),
             }
         }
         if bits.available() == 0 {
@@ -622,12 +622,12 @@ fn decodeAnsiX12Segment(bits: &mut BitSource, result: &mut ECIStringBuilder) ->
                 _ => {
                     if cValue < 14 {
                         // 0 - 9
-                        result.append_char(char::from_u32(cValue + 44).ok_or(Exceptions::parse)?);
+                        result.append_char(char::from_u32(cValue + 44).ok_or(Exceptions::PARSE)?);
                     } else if cValue < 40 {
                         // A - Z
-                        result.append_char(char::from_u32(cValue + 51).ok_or(Exceptions::parse)?);
+                        result.append_char(char::from_u32(cValue + 51).ok_or(Exceptions::PARSE)?);
                     } else {
-                        return Err(Exceptions::format);
+                        return Err(Exceptions::FORMAT);
                     }
                 }
             }
@@ -679,7 +679,7 @@ fn decodeEdifactSegment(bits: &mut BitSource, result: &mut ECIStringBuilder) ->
                 // no 1 in the leading (6th) bit
                 edifactValue |= 0x40; // Add a leading 01 to the 6 bit binary value
             }
-            result.append_char(char::from_u32(edifactValue).ok_or(Exceptions::parse)?);
+            result.append_char(char::from_u32(edifactValue).ok_or(Exceptions::PARSE)?);
         }
 
         if bits.available() == 0 {
@@ -724,7 +724,7 @@ fn decodeBase256Segment(
         // Have seen this particular error in the wild, such as at
         // http://www.bcgen.com/demo/IDAutomationStreamingDataMatrix.aspx?MODE=3&D=Fred&PFMT=3&PT=F&X=0.3&O=0&LM=0.2
         if bits.available() < 8 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         *byte = unrandomize255State(bits.readBits(8)?, codewordPosition) as u8;
         codewordPosition += 1;
@@ -732,7 +732,7 @@ fn decodeBase256Segment(
     result.append_string(
         &encoding::all::ISO_8859_1
             .decode(&bytes, encoding::DecoderTrap::Strict)
-            .map_err(|e| Exceptions::parseWith(e))?,
+            .map_err(|e| Exceptions::parse_with(e))?,
     );
     byteSegments.push(bytes);
 
diff --git a/src/datamatrix/decoder/version.rs b/src/datamatrix/decoder/version.rs
index 72e983e..4879e21 100644
--- a/src/datamatrix/decoder/version.rs
+++ b/src/datamatrix/decoder/version.rs
@@ -103,7 +103,7 @@ impl Version {
      */
     pub fn getVersionForDimensions(numRows: u32, numColumns: u32) -> Result<&'static Version> {
         if (numRows & 0x01) != 0 || (numColumns & 0x01) != 0 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
 
         for version in VERSIONS.iter() {
@@ -112,7 +112,7 @@ impl Version {
             }
         }
 
-        Err(Exceptions::format)
+        Err(Exceptions::FORMAT)
     }
 
     /**
diff --git a/src/datamatrix/detector/datamatrix_detector.rs b/src/datamatrix/detector/datamatrix_detector.rs
index bf7dcd8..d6be4fa 100644
--- a/src/datamatrix/detector/datamatrix_detector.rs
+++ b/src/datamatrix/detector/datamatrix_detector.rs
@@ -55,7 +55,7 @@ impl<'a> Detector<'_> {
         if let Some(point) = self.correctTopRight(&points) {
             points[3] = point;
         } else {
-            return Err(Exceptions::notFoundWith("point 4 unfound"));
+            return Err(Exceptions::not_found_with("point 4 unfound"));
         }
         // points[3] = self.correctTopRight(&points);
         // if points[3] == null {
diff --git a/src/datamatrix/detector/zxing_cpp_detector/cpp_new_detector.rs b/src/datamatrix/detector/zxing_cpp_detector/cpp_new_detector.rs
index 885a98a..432161d 100644
--- a/src/datamatrix/detector/zxing_cpp_detector/cpp_new_detector.rs
+++ b/src/datamatrix/detector/zxing_cpp_detector/cpp_new_detector.rs
@@ -247,7 +247,7 @@ fn Scan(
         ));
     }
 
-    Err(Exceptions::notFound)
+    Err(Exceptions::NOT_FOUND)
 }
 
 pub fn detect(
@@ -351,6 +351,6 @@ pub fn detect(
     }
 
     // #ifndef __cpp_impl_coroutine
-    Err(Exceptions::notFound)
+    Err(Exceptions::NOT_FOUND)
     // #endif
 }
diff --git a/src/datamatrix/detector/zxing_cpp_detector/dm_regression_line.rs b/src/datamatrix/detector/zxing_cpp_detector/dm_regression_line.rs
index 0f0c375..d6e8d9e 100644
--- a/src/datamatrix/detector/zxing_cpp_detector/dm_regression_line.rs
+++ b/src/datamatrix/detector/zxing_cpp_detector/dm_regression_line.rs
@@ -76,7 +76,7 @@ impl RegressionLine for DMRegressionLine {
 
     fn add(&mut self, p: Point) -> Result<()> {
         if self.direction_inward == Point::default() {
-            return Err(Exceptions::illegalState);
+            return Err(Exceptions::ILLEGAL_STATE);
         }
         self.points.push(p);
         if self.points.len() == 1 {
@@ -237,7 +237,7 @@ impl DMRegressionLine {
 
     pub fn modules(&mut self, beg: Point, end: Point) -> Result<f64> {
         if self.points.len() <= 3 {
-            return Err(Exceptions::illegalState);
+            return Err(Exceptions::ILLEGAL_STATE);
         }
 
         // re-evaluate and filter out all points too far away. required for the gapSizes calculation.
@@ -263,12 +263,12 @@ impl DMRegressionLine {
             self.points
                 .last()
                 .copied()
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 - self
                     .points
                     .first()
                     .copied()
-                    .ok_or(Exceptions::indexOutOfBounds)?,
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
         )) as f64;
 
         // calculate the width of 2 modules (first black pixel to first black pixel)
@@ -295,7 +295,7 @@ impl DMRegressionLine {
                         self.points
                             .last()
                             .copied()
-                            .ok_or(Exceptions::indexOutOfBounds)?,
+                            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                     ),
                 ) as f64,
         );
diff --git a/src/datamatrix/detector/zxing_cpp_detector/edge_tracer.rs b/src/datamatrix/detector/zxing_cpp_detector/edge_tracer.rs
index f709e1a..a1c6743 100644
--- a/src/datamatrix/detector/zxing_cpp_detector/edge_tracer.rs
+++ b/src/datamatrix/detector/zxing_cpp_detector/edge_tracer.rs
@@ -203,7 +203,7 @@ impl<'a> EdgeTracer<'_> {
                         if self.whiteAt(pEdge) {
                             // if we are not making any progress, we still have another endless loop bug
                             if self.p == pEdge.centered() {
-                                return Err(Exceptions::illegalState);
+                                return Err(Exceptions::ILLEGAL_STATE);
                             }
                             self.p = pEdge.centered();
 
@@ -274,7 +274,7 @@ impl<'a> EdgeTracer<'_> {
                             .points()
                             .first()
                             .as_ref()
-                            .ok_or(Exceptions::indexOutOfBounds)?,
+                            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                 ) {
                     return Ok(false);
                 }
@@ -304,9 +304,9 @@ impl<'a> EdgeTracer<'_> {
                         .points()
                         .last()
                         .as_ref()
-                        .ok_or(Exceptions::indexOutOfBounds)?)
+                        .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?)
             {
-                return Err(Exceptions::illegalState);
+                return Err(Exceptions::ILLEGAL_STATE);
             }
             if !line.points().is_empty()
                 && &&self.p
@@ -314,7 +314,7 @@ impl<'a> EdgeTracer<'_> {
                         .points()
                         .last()
                         .as_ref()
-                        .ok_or(Exceptions::indexOutOfBounds)?
+                        .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             {
                 return Ok(false);
             }
@@ -358,7 +358,7 @@ impl<'a> EdgeTracer<'_> {
                         line.points()
                             .last()
                             .copied()
-                            .ok_or(Exceptions::indexOutOfBounds)?,
+                            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                     ),
                 ) < 1.0
                 {
@@ -376,7 +376,7 @@ impl<'a> EdgeTracer<'_> {
                                 .points()
                                 .last()
                                 .copied()
-                                .ok_or(Exceptions::indexOutOfBounds)?,
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                     )
                 };
                 line.add(self.p)?;
@@ -393,7 +393,7 @@ impl<'a> EdgeTracer<'_> {
                                     .points()
                                     .first()
                                     .copied()
-                                    .ok_or(Exceptions::indexOutOfBounds)?,
+                                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                         ) {
                             return Ok(false);
                         }
diff --git a/src/datamatrix/detector/zxing_cpp_detector/util.rs b/src/datamatrix/detector/zxing_cpp_detector/util.rs
index 28380cb..c2c4180 100644
--- a/src/datamatrix/detector/zxing_cpp_detector/util.rs
+++ b/src/datamatrix/detector/zxing_cpp_detector/util.rs
@@ -24,7 +24,7 @@ pub fn float_max<T: PartialOrd>(a: T, b: T) -> T {
 #[inline(always)]
 pub fn intersect(l1: &DMRegressionLine, l2: &DMRegressionLine) -> Result<Point> {
     if !(l1.isValid() && l2.isValid()) {
-        return Err(Exceptions::illegalState);
+        return Err(Exceptions::ILLEGAL_STATE);
     }
     let d = l1.a * l2.b - l1.b * l2.a;
     let x = (l1.c * l2.b - l1.b * l2.c) / d;
diff --git a/src/datamatrix/encoder/ascii_encoder.rs b/src/datamatrix/encoder/ascii_encoder.rs
index df14f13..474d612 100644
--- a/src/datamatrix/encoder/ascii_encoder.rs
+++ b/src/datamatrix/encoder/ascii_encoder.rs
@@ -32,12 +32,12 @@ impl Encoder for ASCIIEncoder {
                     .getMessage()
                     .chars()
                     .nth(context.pos as usize)
-                    .ok_or(Exceptions::indexOutOfBounds)?,
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                 context
                     .getMessage()
                     .chars()
                     .nth(context.pos as usize + 1)
-                    .ok_or(Exceptions::indexOutOfBounds)?,
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
             )? as u8);
             context.pos += 2;
         } else {
@@ -74,7 +74,7 @@ impl Encoder for ASCIIEncoder {
                     }
 
                     _ => {
-                        return Err(Exceptions::illegalStateWith(format!(
+                        return Err(Exceptions::illegal_state_with(format!(
                             "Illegal mode: {newMode}"
                         )));
                     }
@@ -105,7 +105,7 @@ impl ASCIIEncoder {
             let num = (digit1 as u8 - 48) * 10 + (digit2 as u8 - 48);
             Ok((num + 130) as char)
         } else {
-            Err(Exceptions::illegalArgumentWith(format!(
+            Err(Exceptions::illegal_argument_with(format!(
                 "not digits: {digit1}{digit2}"
             )))
         }
diff --git a/src/datamatrix/encoder/base256_encoder.rs b/src/datamatrix/encoder/base256_encoder.rs
index 326e9cd..3cf0560 100644
--- a/src/datamatrix/encoder/base256_encoder.rs
+++ b/src/datamatrix/encoder/base256_encoder.rs
@@ -54,7 +54,7 @@ impl Encoder for Base256Encoder {
         context.updateSymbolInfoWithLength(currentSize);
         let mustPad = (context
             .getSymbolInfo()
-            .ok_or(Exceptions::illegalState)?
+            .ok_or(Exceptions::ILLEGAL_STATE)?
             .getDataCapacity()
             - currentSize as u32)
             > 0;
@@ -63,26 +63,26 @@ impl Encoder for Base256Encoder {
                 buffer.replace_range(
                     0..1,
                     &char::from_u32(dataCount as u32)
-                        .ok_or(Exceptions::parse)?
+                        .ok_or(Exceptions::PARSE)?
                         .to_string(),
                 );
             } else if dataCount <= 1555 {
                 buffer.replace_range(
                     0..1,
                     &char::from_u32((dataCount as u32 / 250) + 249)
-                        .ok_or(Exceptions::parse)?
+                        .ok_or(Exceptions::PARSE)?
                         .to_string(),
                 );
                 let (ci_pos, _) = buffer
                     .char_indices()
                     .nth(1)
-                    .ok_or(Exceptions::indexOutOfBounds)?;
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                 buffer.insert(
                     ci_pos,
-                    char::from_u32(dataCount as u32 % 250).ok_or(Exceptions::indexOutOfBounds)?,
+                    char::from_u32(dataCount as u32 % 250).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                 );
             } else {
-                return Err(Exceptions::illegalStateWith(format!(
+                return Err(Exceptions::illegal_state_with(format!(
                     "Message length not in valid ranges: {dataCount}"
                 )));
             }
@@ -92,10 +92,10 @@ impl Encoder for Base256Encoder {
             // for (int i = 0, c = buffer.length(); i < c; i++) {
             context.writeCodeword(
                 Self::randomize255State(
-                    buffer.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)?,
+                    buffer.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                     context.getCodewordCount() as u32 + 1,
                 )
-                .ok_or(Exceptions::parse)? as u8,
+                .ok_or(Exceptions::PARSE)? as u8,
             );
         }
         Ok(())
diff --git a/src/datamatrix/encoder/c40_encoder.rs b/src/datamatrix/encoder/c40_encoder.rs
index 7ee5a97..55c5e78 100644
--- a/src/datamatrix/encoder/c40_encoder.rs
+++ b/src/datamatrix/encoder/c40_encoder.rs
@@ -66,7 +66,7 @@ impl C40Encoder {
             context.updateSymbolInfoWithLength(curCodewordCount);
             let available = context
                 .getSymbolInfo()
-                .ok_or(Exceptions::illegalState)?
+                .ok_or(Exceptions::ILLEGAL_STATE)?
                 .getDataCapacity() as usize
                 - curCodewordCount;
 
@@ -141,7 +141,7 @@ impl C40Encoder {
             context.updateSymbolInfoWithLength(curCodewordCount);
             let available = context
                 .getSymbolInfo()
-                .ok_or(Exceptions::illegalState)?
+                .ok_or(Exceptions::ILLEGAL_STATE)?
                 .getDataCapacity() as usize
                 - curCodewordCount;
             let rest = buffer.chars().count() % 3;
@@ -184,7 +184,7 @@ impl C40Encoder {
         buffer: &mut String,
     ) -> Result<()> {
         context.writeCodewords(
-            &Self::encodeToCodewords(buffer).ok_or(Exceptions::FormatException(None))?,
+            &Self::encodeToCodewords(buffer).ok_or(Exceptions::FORMAT)?,
         );
         buffer.replace_range(0..3, "");
         // buffer.delete(0, 3);
@@ -205,7 +205,7 @@ impl C40Encoder {
         context.updateSymbolInfoWithLength(curCodewordCount);
         let available = context
             .getSymbolInfo()
-            .ok_or(Exceptions::illegalState)?
+            .ok_or(Exceptions::ILLEGAL_STATE)?
             .getDataCapacity() as usize
             - curCodewordCount;
 
@@ -234,7 +234,7 @@ impl C40Encoder {
                 context.writeCodeword(C40_UNLATCH);
             }
         } else {
-            return Err(Exceptions::illegalStateWith(
+            return Err(Exceptions::illegal_state_with(
                 "Unexpected case. Please report!",
             ));
         }
diff --git a/src/datamatrix/encoder/default_placement.rs b/src/datamatrix/encoder/default_placement.rs
index fbdaacb..c49c208 100644
--- a/src/datamatrix/encoder/default_placement.rs
+++ b/src/datamatrix/encoder/default_placement.rs
@@ -165,7 +165,7 @@ impl DefaultPlacement {
             .codewords
             .chars()
             .nth(pos)
-            .ok_or(Exceptions::indexOutOfBounds)? as u32;
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u32;
         v &= 1 << (8 - bit);
         self.setBit(col as usize, row as usize, v != 0);
 
diff --git a/src/datamatrix/encoder/edifact_encoder.rs b/src/datamatrix/encoder/edifact_encoder.rs
index 603c6c8..d7bd8f4 100644
--- a/src/datamatrix/encoder/edifact_encoder.rs
+++ b/src/datamatrix/encoder/edifact_encoder.rs
@@ -77,7 +77,7 @@ impl EdifactEncoder {
                 context.updateSymbolInfo();
                 let mut available = context
                     .getSymbolInfo()
-                    .ok_or(Exceptions::illegalState)?
+                    .ok_or(Exceptions::ILLEGAL_STATE)?
                     .getDataCapacity()
                     - context.getCodewordCount() as u32;
                 let remaining = context.getRemainingCharacters();
@@ -86,7 +86,7 @@ impl EdifactEncoder {
                     context.updateSymbolInfoWithLength(context.getCodewordCount() + 1);
                     available = context
                         .getSymbolInfo()
-                        .ok_or(Exceptions::illegalState)?
+                        .ok_or(Exceptions::ILLEGAL_STATE)?
                         .getDataCapacity()
                         - context.getCodewordCount() as u32;
                 }
@@ -96,7 +96,7 @@ impl EdifactEncoder {
             }
 
             if count > 4 {
-                return Err(Exceptions::illegalStateWith("Count must not exceed 4"));
+                return Err(Exceptions::illegal_state_with("Count must not exceed 4"));
             }
             let restChars = count - 1;
             let encoded = Self::encodeToCodewords(buffer)?;
@@ -107,7 +107,7 @@ impl EdifactEncoder {
                 context.updateSymbolInfoWithLength(context.getCodewordCount() + restChars);
                 let available = context
                     .getSymbolInfo()
-                    .ok_or(Exceptions::illegalState)?
+                    .ok_or(Exceptions::ILLEGAL_STATE)?
                     .getDataCapacity()
                     - context.getCodewordCount() as u32;
                 if available >= 3 {
@@ -148,23 +148,23 @@ impl EdifactEncoder {
     fn encodeToCodewords(sb: &str) -> Result<String> {
         let len = sb.chars().count();
         if len == 0 {
-            return Err(Exceptions::illegalStateWith(
+            return Err(Exceptions::illegal_state_with(
                 "StringBuilder must not be empty",
             ));
         }
-        let c1 = sb.chars().next().ok_or(Exceptions::indexOutOfBounds)?;
+        let c1 = sb.chars().next().ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
         let c2 = if len >= 2 {
-            sb.chars().nth(1).ok_or(Exceptions::indexOutOfBounds)?
+            sb.chars().nth(1).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
         } else {
             0 as char
         };
         let c3 = if len >= 3 {
-            sb.chars().nth(2).ok_or(Exceptions::indexOutOfBounds)?
+            sb.chars().nth(2).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
         } else {
             0 as char
         };
         let c4 = if len >= 4 {
-            sb.chars().nth(3).ok_or(Exceptions::indexOutOfBounds)?
+            sb.chars().nth(3).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
         } else {
             0 as char
         };
@@ -174,12 +174,12 @@ impl EdifactEncoder {
         let cw2 = (v >> 8) & 255;
         let cw3 = v & 255;
         let mut res = String::with_capacity(3);
-        res.push(char::from_u32(cw1).ok_or(Exceptions::indexOutOfBounds)?);
+        res.push(char::from_u32(cw1).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?);
         if len >= 2 {
-            res.push(char::from_u32(cw2).ok_or(Exceptions::indexOutOfBounds)?);
+            res.push(char::from_u32(cw2).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?);
         }
         if len >= 3 {
-            res.push(char::from_u32(cw3).ok_or(Exceptions::indexOutOfBounds)?);
+            res.push(char::from_u32(cw3).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?);
         }
 
         Ok(res)
diff --git a/src/datamatrix/encoder/encoder_context.rs b/src/datamatrix/encoder/encoder_context.rs
index bb49293..51fd9a3 100644
--- a/src/datamatrix/encoder/encoder_context.rs
+++ b/src/datamatrix/encoder/encoder_context.rs
@@ -64,10 +64,10 @@ impl<'a> EncoderContext<'_> {
             ISO_8859_1_ENCODER
                 .decode(&encoded_bytes, encoding::DecoderTrap::Strict)
                 .map_err(|e| {
-                    Exceptions::parseWith(format!("round trip decode should always work: {e}"))
+                    Exceptions::parse_with(format!("round trip decode should always work: {e}"))
                 })?
         } else {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Message contains characters outside ISO-8859-1 encoding.",
             ));
         };
diff --git a/src/datamatrix/encoder/error_correction.rs b/src/datamatrix/encoder/error_correction.rs
index 10d18ea..7ee3b69 100644
--- a/src/datamatrix/encoder/error_correction.rs
+++ b/src/datamatrix/encoder/error_correction.rs
@@ -155,7 +155,7 @@ const ALOG: [u32; 255] = {
  */
 pub fn encodeECC200(codewords: &str, symbolInfo: &SymbolInfo) -> Result<String> {
     if codewords.chars().count() != symbolInfo.getDataCapacity() as usize {
-        return Err(Exceptions::illegalArgumentWith(
+        return Err(Exceptions::illegal_argument_with(
             "The number of codewords does not match the selected symbol",
         ));
     }
@@ -186,7 +186,7 @@ pub fn encodeECC200(codewords: &str, symbolInfo: &SymbolInfo) -> Result<String>
                     codewords
                         .chars()
                         .nth(d)
-                        .ok_or(Exceptions::indexOutOfBounds)?,
+                        .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                 );
 
                 d += blockCount;
@@ -199,12 +199,12 @@ pub fn encodeECC200(codewords: &str, symbolInfo: &SymbolInfo) -> Result<String>
                 let (char_index, replace_char) = sb
                     .char_indices()
                     .nth(symbolInfo.getDataCapacity() as usize + e)
-                    .ok_or(Exceptions::indexOutOfBounds)?;
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                 sb.replace_range(
                     char_index..(replace_char.len_utf8()),
                     &ecc.chars()
                         .nth(pos)
-                        .ok_or(Exceptions::indexOutOfBounds)?
+                        .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                         .to_string(),
                 );
                 // sb.setCharAt(symbolInfo.getDataCapacity() + e, ecc.charAt(pos));
@@ -229,7 +229,7 @@ fn createECCBlock(codewords: &str, numECWords: usize) -> Result<String> {
         }
     }
     if table < 0 {
-        return Err(Exceptions::illegalArgumentWith(format!(
+        return Err(Exceptions::illegal_argument_with(format!(
             "Illegal number of error correction codewords specified: {numECWords}"
         )));
     }
@@ -245,21 +245,21 @@ fn createECCBlock(codewords: &str, numECWords: usize) -> Result<String> {
             ^ codewords
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)? as usize;
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as usize;
         for k in (1..numECWords).rev() {
             // for (int k = numECWords - 1; k > 0; k--) {
             if m != 0 && poly[k] != 0 {
                 ecc[k] = char::from_u32(
                     ecc[k - 1] as u32 ^ ALOG[(LOG[m] + LOG[poly[k] as usize]) as usize % 255],
                 )
-                .ok_or(Exceptions::indexOutOfBounds)?;
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
             } else {
                 ecc[k] = ecc[k - 1];
             }
         }
         if m != 0 && poly[0] != 0 {
             ecc[0] = char::from_u32(ALOG[(LOG[m] + LOG[poly[0] as usize]) as usize % 255])
-                .ok_or(Exceptions::indexOutOfBounds)?;
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
         } else {
             ecc[0] = 0 as char;
         }
diff --git a/src/datamatrix/encoder/high_level_encoder.rs b/src/datamatrix/encoder/high_level_encoder.rs
index a25ac82..ace5b68 100644
--- a/src/datamatrix/encoder/high_level_encoder.rs
+++ b/src/datamatrix/encoder/high_level_encoder.rs
@@ -222,14 +222,14 @@ pub fn encodeHighLevelWithDimensionForceC40WithSymbolInfoLookup(
 
     if forceC40 {
         c40Encoder.encodeMaximalC40(&mut context)?;
-        encodingMode = context.getNewEncoding().ok_or(Exceptions::illegalState)?;
+        encodingMode = context.getNewEncoding().ok_or(Exceptions::ILLEGAL_STATE)?;
         context.resetEncoderSignal();
     }
 
     while context.hasMoreCharacters() {
         encoders[encodingMode].encode(&mut context)?;
         if context.getNewEncoding().is_some() {
-            encodingMode = context.getNewEncoding().ok_or(Exceptions::illegalState)?;
+            encodingMode = context.getNewEncoding().ok_or(Exceptions::ILLEGAL_STATE)?;
             context.resetEncoderSignal();
         }
     }
@@ -237,7 +237,7 @@ pub fn encodeHighLevelWithDimensionForceC40WithSymbolInfoLookup(
     context.updateSymbolInfo();
     let capacity = context
         .getSymbolInfo()
-        .ok_or(Exceptions::illegalState)?
+        .ok_or(Exceptions::ILLEGAL_STATE)?
         .getDataCapacity();
     if len < capacity as usize
         && encodingMode != ASCII_ENCODATION
@@ -608,7 +608,7 @@ pub fn determineConsecutiveDigitCount(msg: &str, startpos: u32) -> u32 {
 pub fn illegalCharacter(c: char) -> Result<()> {
     // let hex = Integer.toHexString(c);
     // hex = "0000".substring(0, 4 - hex.length()) + hex;
-    Err(Exceptions::illegalArgumentWith(format!(
+    Err(Exceptions::illegal_argument_with(format!(
         "Illegal character: {c} (0x{c})"
     )))
 }
diff --git a/src/datamatrix/encoder/minimal_encoder.rs b/src/datamatrix/encoder/minimal_encoder.rs
index 248a670..d248f02 100755
--- a/src/datamatrix/encoder/minimal_encoder.rs
+++ b/src/datamatrix/encoder/minimal_encoder.rs
@@ -218,7 +218,7 @@ fn addEdge(edges: &mut [Vec<Option<Rc<Edge>>>], edge: Rc<Edge>) -> Result<()> {
     if edges[vertexIndex][edge.getEndMode()?.ordinal()].is_none()
         || edges[vertexIndex][edge.getEndMode()?.ordinal()]
             .as_ref()
-            .ok_or(Exceptions::illegalState)?
+            .ok_or(Exceptions::ILLEGAL_STATE)?
             .cachedTotalSize
             > edge.cachedTotalSize
     {
@@ -635,7 +635,7 @@ fn encodeMinimally(input: Rc<Input>) -> Result<RXingResult> {
     }
 
     if minimalJ < 0 {
-        return Err(Exceptions::illegalStateWith(format!(
+        return Err(Exceptions::illegal_state_with(format!(
             "Internal error: failed to encode \"{input}\""
         )));
     }
@@ -669,7 +669,7 @@ impl Edge {
         previous: Option<Rc<Edge>>,
     ) -> Result<Self> {
         if fromPosition + characterLength > input.length() as u32 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
 
         let mut size = if let Some(previous) = previous.clone() {
@@ -1276,7 +1276,7 @@ impl RXingResult {
         let solution = if let Some(edge) = solution {
             edge
         } else {
-            return Err(Exceptions::illegalArgument);
+            return Err(Exceptions::ILLEGAL_ARGUMENT);
         };
         let input = solution.input.clone();
         let mut size = 0;
diff --git a/src/datamatrix/encoder/symbol_info.rs b/src/datamatrix/encoder/symbol_info.rs
index 1975385..eb129fc 100644
--- a/src/datamatrix/encoder/symbol_info.rs
+++ b/src/datamatrix/encoder/symbol_info.rs
@@ -129,7 +129,7 @@ impl SymbolInfo {
             2 | 4 => Ok(2),
             16 => Ok(4),
             36 => Ok(6),
-            _ => Err(Exceptions::illegalStateWith(
+            _ => Err(Exceptions::illegal_state_with(
                 "Cannot handle this number of data regions",
             )),
         }
@@ -141,7 +141,7 @@ impl SymbolInfo {
             4 => Ok(2),
             16 => Ok(4),
             36 => Ok(6),
-            _ => Err(Exceptions::illegalStateWith(
+            _ => Err(Exceptions::illegal_state_with(
                 "Cannot handle this number of data regions",
             )),
         }
@@ -311,7 +311,7 @@ impl<'a> SymbolInfoLookup<'a> {
             }
         }
         if fail {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Can't find a symbol arrangement that matches the message. Data codewords: {dataCodewords}"
             )));
         }
diff --git a/src/datamatrix/encoder/x12_encoder.rs b/src/datamatrix/encoder/x12_encoder.rs
index 174c81a..1c12a31 100644
--- a/src/datamatrix/encoder/x12_encoder.rs
+++ b/src/datamatrix/encoder/x12_encoder.rs
@@ -82,7 +82,7 @@ impl X12Encoder {
         context.updateSymbolInfo();
         let available = context
             .getSymbolInfo()
-            .ok_or(Exceptions::illegalState)?
+            .ok_or(Exceptions::ILLEGAL_STATE)?
             .getDataCapacity()
             - context.getCodewordCount() as u32;
         let count = buffer.chars().count();
diff --git a/src/exceptions.rs b/src/exceptions.rs
index e33197a..8a908ec 100644
--- a/src/exceptions.rs
+++ b/src/exceptions.rs
@@ -1,144 +1,104 @@
-use std::{error::Error, fmt};
-
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
+use thiserror::Error;
 
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Error, Debug, PartialEq, Eq)]
 pub enum Exceptions {
-    IllegalArgumentException(Option<String>),
-    UnsupportedOperationException(Option<String>),
-    IllegalStateException(Option<String>),
-    ArithmeticException(Option<String>),
-    NotFoundException(Option<String>),
-    FormatException(Option<String>),
-    ChecksumException(Option<String>),
-    ReaderException(Option<String>),
-    WriterException(Option<String>),
-    ReedSolomonException(Option<String>),
-    IndexOutOfBoundsException(Option<String>),
-    RuntimeException(Option<String>),
-    ParseException(Option<String>),
+    #[error("IllegalArgumentException{}", if .0.is_empty() { String::new() } else { format!(" - {}", .0) })]
+    IllegalArgumentException(String),
+    #[error("UnsupportedOperationException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    UnsupportedOperationException(String),
+    #[error("IllegalStateException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    IllegalStateException(String),
+    #[error("ArithmeticException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    ArithmeticException(String),
+    #[error("NotFoundException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    NotFoundException(String),
+    #[error("FormatException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    FormatException(String),
+    #[error("ChecksumException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    ChecksumException(String),
+    #[error("ReaderException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    ReaderException(String),
+    #[error("WriterException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    WriterException(String),
+    #[error("ReedSolomonException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    ReedSolomonException(String),
+    #[error("IndexOutOfBoundsException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    IndexOutOfBoundsException(String),
+    #[error("RuntimeException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    RuntimeException(String),
+    #[error("ParseException{}", if .0.is_empty() { String::new()  } else { format!(" - {}", .0) })]
+    ParseException(String),
+    #[error("ReaderDecodeException")]
     ReaderDecodeException(),
 }
 
 #[allow(non_upper_case_globals)]
 impl Exceptions {
-    pub const illegalArgument: Self = Self::IllegalArgumentException(None);
-    pub fn illegalArgumentWith<I: Into<String>>(x: I) -> Self {
-        Self::IllegalArgumentException(Some(x.into()))
+    pub const ILLEGAL_ARGUMENT: Self = Self::IllegalArgumentException(String::new());
+    pub fn illegal_argument_with<I: Into<String>>(x: I) -> Self {
+        Self::IllegalArgumentException(x.into())
     }
 
-    pub const unsupportedOperation: Self = Self::UnsupportedOperationException(None);
-    pub fn unsupportedOperationWith<I: Into<String>>(x: I) -> Self {
-        Self::UnsupportedOperationException(Some(x.into()))
+    pub const UNSUPPORTED_OPERATION: Self = Self::UnsupportedOperationException(String::new());
+    pub fn unsupported_operation_with<I: Into<String>>(x: I) -> Self {
+        Self::UnsupportedOperationException(x.into())
     }
 
-    pub const illegalState: Self = Self::IllegalStateException(None);
-    pub fn illegalStateWith<I: Into<String>>(x: I) -> Self {
-        Self::IllegalStateException(Some(x.into()))
+    pub const ILLEGAL_STATE: Self = Self::IllegalStateException(String::new());
+    pub fn illegal_state_with<I: Into<String>>(x: I) -> Self {
+        Self::IllegalStateException(x.into())
     }
 
-    pub const arithmetic: Self = Self::ArithmeticException(None);
-    pub fn arithmeticWith<I: Into<String>>(x: I) -> Self {
-        Self::ArithmeticException(Some(x.into()))
+    pub const ARITHMETIC: Self = Self::ArithmeticException(String::new());
+    pub fn arithmetic_with<I: Into<String>>(x: I) -> Self {
+        Self::ArithmeticException(x.into())
     }
 
-    pub const notFound: Self = Self::NotFoundException(None);
-    pub fn notFoundWith<I: Into<String>>(x: I) -> Self {
-        Self::NotFoundException(Some(x.into()))
+    pub const NOT_FOUND: Self = Self::NotFoundException(String::new());
+    pub fn not_found_with<I: Into<String>>(x: I) -> Self {
+        Self::NotFoundException(x.into())
     }
 
-    pub const format: Self = Self::FormatException(None);
-    pub fn formatWith<I: Into<String>>(x: I) -> Self {
-        Self::FormatException(Some(x.into()))
+    pub const FORMAT: Self = Self::FormatException(String::new());
+    pub fn format_with<I: Into<String>>(x: I) -> Self {
+        Self::FormatException(x.into())
     }
 
-    pub const checksum: Self = Self::ChecksumException(None);
-    pub fn checksumWith<I: Into<String>>(x: I) -> Self {
-        Self::ChecksumException(Some(x.into()))
+    pub const CHECKSUM: Self = Self::ChecksumException(String::new());
+    pub fn checksum_with<I: Into<String>>(x: I) -> Self {
+        Self::ChecksumException(x.into())
     }
 
-    pub const reader: Self = Self::ReaderException(None);
-    pub fn readerWith<I: Into<String>>(x: I) -> Self {
-        Self::ReaderException(Some(x.into()))
+    pub const READER: Self = Self::ReaderException(String::new());
+    pub fn reader_with<I: Into<String>>(x: I) -> Self {
+        Self::ReaderException(x.into())
     }
 
-    pub const writer: Self = Self::WriterException(None);
-    pub fn writerWith<I: Into<String>>(x: I) -> Self {
-        Self::WriterException(Some(x.into()))
+    pub const WRITER: Self = Self::WriterException(String::new());
+    pub fn writer_with<I: Into<String>>(x: I) -> Self {
+        Self::WriterException(x.into())
     }
 
-    pub const reedSolomon: Self = Self::ReedSolomonException(None);
-    pub fn reedSolomonWith<I: Into<String>>(x: I) -> Self {
-        Self::ReedSolomonException(Some(x.into()))
+    pub const REED_SOLOMON: Self = Self::ReedSolomonException(String::new());
+    pub fn reed_solomon_with<I: Into<String>>(x: I) -> Self {
+        Self::ReedSolomonException(x.into())
     }
 
-    pub const indexOutOfBounds: Self = Self::IndexOutOfBoundsException(None);
-    pub fn indexOutOfBoundsWith<I: Into<String>>(x: I) -> Self {
-        Self::IndexOutOfBoundsException(Some(x.into()))
+    pub const INDEX_OUT_OF_BOUNDS: Self = Self::IndexOutOfBoundsException(String::new());
+    pub fn index_out_of_bounds_with<I: Into<String>>(x: I) -> Self {
+        Self::IndexOutOfBoundsException(x.into())
     }
 
-    pub const runtime: Self = Self::RuntimeException(None);
-    pub fn runtimeWith<I: Into<String>>(x: I) -> Self {
-        Self::RuntimeException(Some(x.into()))
+    pub const RUNTIME: Self = Self::RuntimeException(String::new());
+    pub fn runtime_with<I: Into<String>>(x: I) -> Self {
+        Self::RuntimeException(x.into())
     }
 
-    pub const parse: Self = Self::ParseException(None);
-    pub fn parseWith<I: Into<String>>(x: I) -> Self {
-        Self::ParseException(Some(x.into()))
+    pub const PARSE: Self = Self::ParseException(String::new());
+    pub fn parse_with<I: Into<String>>(x: I) -> Self {
+        Self::ParseException(x.into())
     }
 }
-
-impl fmt::Display for Exceptions {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Exceptions::IllegalArgumentException(Some(a)) => {
-                write!(f, "IllegalArgumentException - {a}")
-            }
-
-            Exceptions::UnsupportedOperationException(Some(a)) => {
-                write!(f, "UnsupportedOperationException - {a}")
-            }
-
-            Exceptions::IllegalStateException(Some(a)) => {
-                write!(f, "IllegalStateException - {a}")
-            }
-            Exceptions::ArithmeticException(Some(a)) => write!(f, "ArithmeticException - {a}"),
-            Exceptions::NotFoundException(Some(a)) => write!(f, "NotFoundException - {a}"),
-            Exceptions::FormatException(Some(a)) => write!(f, "FormatException - {a}"),
-            Exceptions::ChecksumException(Some(a)) => write!(f, "ChecksumException - {a}"),
-            Exceptions::ReaderException(Some(a)) => write!(f, "ReaderException - {a}"),
-            Exceptions::WriterException(Some(a)) => write!(f, "WriterException - {a}"),
-            Exceptions::ReedSolomonException(Some(a)) => write!(f, "ReedSolomonException - {a}"),
-            Exceptions::IndexOutOfBoundsException(Some(a)) => {
-                write!(f, "IndexOutOfBoundsException - {a}")
-            }
-
-            Exceptions::RuntimeException(Some(a)) => write!(f, "RuntimeException - {a}"),
-            Exceptions::ParseException(Some(a)) => write!(f, "ParseException - {a}"),
-
-            Exceptions::IllegalArgumentException(None) => write!(f, "IllegalArgumentException"),
-
-            Exceptions::UnsupportedOperationException(None) => {
-                write!(f, "UnsupportedOperationException")
-            }
-            Exceptions::IllegalStateException(None) => write!(f, "IllegalStateException"),
-            Exceptions::ArithmeticException(None) => write!(f, "ArithmeticException"),
-            Exceptions::NotFoundException(None) => write!(f, "NotFoundException"),
-            Exceptions::FormatException(None) => write!(f, "FormatException"),
-            Exceptions::ChecksumException(None) => write!(f, "ChecksumException"),
-            Exceptions::ReaderException(None) => write!(f, "ReaderException"),
-            Exceptions::WriterException(None) => write!(f, "WriterException"),
-            Exceptions::ReedSolomonException(None) => write!(f, "ReedSolomonException"),
-            Exceptions::IndexOutOfBoundsException(None) => write!(f, "IndexOutOfBoundsException"),
-
-            Exceptions::RuntimeException(None) => write!(f, "RuntimeException"),
-            Exceptions::ParseException(None) => write!(f, "ParseException"),
-
-            Exceptions::ReaderDecodeException() => write!(f, "ReaderDecodeException"),
-        }
-    }
-}
-
-impl Error for Exceptions {}
diff --git a/src/helpers.rs b/src/helpers.rs
index 8cc2ab7..5e6cc50 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -32,16 +32,16 @@ pub fn detect_in_svg_with_hints(
 
     let path = PathBuf::from(file_name);
     if !path.exists() {
-        return Err(Exceptions::illegalArgumentWith("file does not exist"));
+        return Err(Exceptions::illegal_argument_with("file does not exist"));
     }
 
     let Ok(mut file) = File::open(path) else {
-        return Err(Exceptions::illegalArgumentWith("file cannot be opened"));
+        return Err(Exceptions::illegal_argument_with("file cannot be opened"));
     };
 
     let mut svg_data = Vec::new();
     if file.read_to_end(&mut svg_data).is_err() {
-        return Err(Exceptions::illegalArgumentWith("file cannot be read"));
+        return Err(Exceptions::illegal_argument_with("file cannot be read"));
     }
 
     let mut multi_format_reader = MultiFormatReader::default();
@@ -81,16 +81,16 @@ pub fn detect_multiple_in_svg_with_hints(
 
     let path = PathBuf::from(file_name);
     if !path.exists() {
-        return Err(Exceptions::illegalArgumentWith("file does not exist"));
+        return Err(Exceptions::illegal_argument_with("file does not exist"));
     }
 
     let Ok(mut file) = File::open(path) else {
-        return Err(Exceptions::illegalArgumentWith("file cannot be opened"));
+        return Err(Exceptions::illegal_argument_with("file cannot be opened"));
     };
 
     let mut svg_data = Vec::new();
     if file.read_to_end(&mut svg_data).is_err() {
-        return Err(Exceptions::illegalArgumentWith("file cannot be read"));
+        return Err(Exceptions::illegal_argument_with("file cannot be read"));
     }
 
     let multi_format_reader = MultiFormatReader::default();
@@ -120,7 +120,7 @@ pub fn detect_in_file_with_hints(
     hints: &mut DecodingHintDictionary,
 ) -> Result<RXingResult> {
     let Ok(img) = image::open(file_name) else {
-        return Err(Exceptions::illegalArgumentWith(format!("file '{file_name}' not found or cannot be opened")));
+        return Err(Exceptions::illegal_argument_with(format!("file '{file_name}' not found or cannot be opened")));
     };
     let mut multi_format_reader = MultiFormatReader::default();
 
@@ -154,7 +154,7 @@ pub fn detect_multiple_in_file_with_hints(
     hints: &mut DecodingHintDictionary,
 ) -> Result<Vec<RXingResult>> {
     let img = image::open(file_name).map_err(|e| {
-        Exceptions::RuntimeException(Some(format!("couldn't read {file_name}: {e}")))
+        Exceptions::runtime_with(format!("couldn't read {file_name}: {e}"))
     })?;
     let multi_format_reader = MultiFormatReader::default();
     let mut scanner = GenericMultipleBarcodeReader::new(multi_format_reader);
@@ -238,7 +238,7 @@ pub fn save_image(file_name: &str, bit_matrix: &BitMatrix) -> Result<()> {
     let image: image::DynamicImage = bit_matrix.into();
     match image.save(file_name) {
         Ok(_) => Ok(()),
-        Err(err) => Err(Exceptions::illegalArgumentWith(format!(
+        Err(err) => Err(Exceptions::illegal_argument_with(format!(
             "could not save file '{file_name}': {err}"
         ))),
     }
@@ -250,7 +250,7 @@ pub fn save_svg(file_name: &str, bit_matrix: &BitMatrix) -> Result<()> {
 
     match svg::save(file_name, &svg) {
         Ok(_) => Ok(()),
-        Err(err) => Err(Exceptions::illegalArgumentWith(format!(
+        Err(err) => Err(Exceptions::illegal_argument_with(format!(
             "could not save file '{}': {}",
             file_name, err
         ))),
@@ -285,7 +285,7 @@ pub fn save_file(file_name: &str, bit_matrix: &BitMatrix) -> Result<()> {
         Ok(())
     }() {
         Ok(_) => Ok(()),
-        Err(_) => Err(Exceptions::illegalArgumentWith(format!(
+        Err(_) => Err(Exceptions::illegal_argument_with(format!(
             "could not write to '{file_name}'"
         ))),
     }
diff --git a/src/luma_luma_source.rs b/src/luma_luma_source.rs
index d326734..1d25521 100644
--- a/src/luma_luma_source.rs
+++ b/src/luma_luma_source.rs
@@ -96,9 +96,9 @@ impl LuminanceSource for Luma8LuminanceSource {
     }
 
     fn rotateCounterClockwise45(&self) -> Result<Box<dyn LuminanceSource>> {
-        Err(crate::Exceptions::UnsupportedOperationException(Some(
-            "This luminance source does not support rotation by 45 degrees.".to_owned(),
-        )))
+        Err(crate::Exceptions::unsupported_operation_with(
+            "This luminance source does not support rotation by 45 degrees.",
+        ))
     }
 }
 
diff --git a/src/luminance_source.rs b/src/luminance_source.rs
index 581c86a..022c4ed 100644
--- a/src/luminance_source.rs
+++ b/src/luminance_source.rs
@@ -92,9 +92,9 @@ pub trait LuminanceSource {
         _width: usize,
         _height: usize,
     ) -> Result<Box<dyn LuminanceSource>> {
-        Err(Exceptions::UnsupportedOperationException(Some(
-            "This luminance source does not support cropping.".to_owned(),
-        )))
+        Err(Exceptions::unsupported_operation_with(
+            "This luminance source does not support cropping.",
+        ))
     }
 
     /**
@@ -119,9 +119,9 @@ pub trait LuminanceSource {
      * @return A rotated version of this object.
      */
     fn rotateCounterClockwise(&self) -> Result<Box<dyn LuminanceSource>> {
-        Err(Exceptions::UnsupportedOperationException(Some(
-            "This luminance source does not support rotation by 90 degrees.".to_owned(),
-        )))
+        Err(Exceptions::unsupported_operation_with(
+            "This luminance source does not support rotation by 90 degrees.",
+        ))
     }
 
     /**
@@ -131,9 +131,9 @@ pub trait LuminanceSource {
      * @return A rotated version of this object.
      */
     fn rotateCounterClockwise45(&self) -> Result<Box<dyn LuminanceSource>> {
-        Err(Exceptions::UnsupportedOperationException(Some(
-            "This luminance source does not support rotation by 45 degrees.".to_owned(),
-        )))
+        Err(Exceptions::unsupported_operation_with(
+            "This luminance source does not support rotation by 45 degrees.",
+        ))
     }
 
     #[inline(always)]
diff --git a/src/maxicode/decoder/decoded_bit_stream_parser.rs b/src/maxicode/decoder/decoded_bit_stream_parser.rs
index 14c1d18..e88584f 100644
--- a/src/maxicode/decoder/decoded_bit_stream_parser.rs
+++ b/src/maxicode/decoder/decoded_bit_stream_parser.rs
@@ -89,7 +89,7 @@ pub fn decode(bytes: &[u8], mode: u8) -> Result<DecoderRXingResult> {
                 let pc = getPostCode2(bytes);
                 let ps2Length = getPostCode2Length(bytes) as usize;
                 if ps2Length > 10 {
-                    return Err(Exceptions::format);
+                    return Err(Exceptions::FORMAT);
                 }
                 // NumberFormat df = new DecimalFormat("0000000000".substring(0, ps2Length));
                 // postcode = df.format(pc);
diff --git a/src/maxicode/decoder/maxicode_decoder.rs b/src/maxicode/decoder/maxicode_decoder.rs
index 95bbf41..231bbed 100644
--- a/src/maxicode/decoder/maxicode_decoder.rs
+++ b/src/maxicode/decoder/maxicode_decoder.rs
@@ -70,7 +70,7 @@ pub fn decode_with_hints(
             correctErrors(&mut codewords, 20, 68, 56, ODD)?;
             datawords = vec![0u8; 78];
         }
-        _ => return Err(Exceptions::notFound),
+        _ => return Err(Exceptions::NOT_FOUND),
     }
 
     datawords[0..10].clone_from_slice(&codewords[0..10]);
diff --git a/src/maxicode/detector.rs b/src/maxicode/detector.rs
index d0bfc0d..2b777b7 100644
--- a/src/maxicode/detector.rs
+++ b/src/maxicode/detector.rs
@@ -316,7 +316,7 @@ impl Circle<'_> {
 pub fn detect(image: &BitMatrix, try_harder: bool) -> Result<MaxicodeDetectionResult> {
     // find concentric circles
     let Some( mut circles) = find_concentric_circles(image) else {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     };
 
     // we should have an idea where the center is at this point,
@@ -339,7 +339,7 @@ pub fn detect(image: &BitMatrix, try_harder: bool) -> Result<MaxicodeDetectionRe
             if try_harder {
                 continue;
             }else {
-                return Err(Exceptions::notFound)
+                return Err(Exceptions::NOT_FOUND)
             }
         };
         let grid_sampler = DefaultGridSampler::default();
@@ -376,7 +376,7 @@ pub fn detect(image: &BitMatrix, try_harder: bool) -> Result<MaxicodeDetectionRe
             if try_harder {
                 continue;
             }else {
-                return Err(Exceptions::notFound)
+                return Err(Exceptions::NOT_FOUND)
             }
         };
         return Ok(MaxicodeDetectionResult {
@@ -390,7 +390,7 @@ pub fn detect(image: &BitMatrix, try_harder: bool) -> Result<MaxicodeDetectionRe
         });
     }
 
-    Err(Exceptions::notFound)
+    Err(Exceptions::NOT_FOUND)
 }
 
 /// Locate concentric circles.
@@ -729,7 +729,7 @@ fn box_symbol(image: &BitMatrix, circle: &mut Circle) -> Result<([(f32, f32); 4]
     #[cfg(feature = "experimental_features")]
     if is_ellipse {
         // we don't deal with ellipses yet
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
 
     let mut final_rotation = 0.0;
@@ -1049,7 +1049,7 @@ fn compare_circle(a: &Circle, b: &Circle) -> std::cmp::Ordering {
 pub fn read_bits(image: &BitMatrix) -> Result<BitMatrix> {
     let enclosingRectangle = image
         .getEnclosingRectangle()
-        .ok_or(Exceptions::NotFoundException(None))?;
+        .ok_or(Exceptions::NOT_FOUND)?;
 
     let left = enclosingRectangle[0];
     let top = enclosingRectangle[1];
diff --git a/src/maxicode/maxi_code_reader.rs b/src/maxicode/maxi_code_reader.rs
index d024110..7b331ba 100644
--- a/src/maxicode/maxi_code_reader.rs
+++ b/src/maxicode/maxi_code_reader.rs
@@ -123,10 +123,10 @@ impl MaxiCodeReader {
     fn extractPureBits(image: &BitMatrix) -> Result<BitMatrix> {
         let enclosingRectangleOption = image.getEnclosingRectangle();
         if enclosingRectangleOption.is_none() {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
-        let enclosingRectangle = enclosingRectangleOption.ok_or(Exceptions::notFound)?;
+        let enclosingRectangle = enclosingRectangleOption.ok_or(Exceptions::NOT_FOUND)?;
 
         let left = enclosingRectangle[0];
         let top = enclosingRectangle[1];
diff --git a/src/multi/generic_multiple_barcode_reader.rs b/src/multi/generic_multiple_barcode_reader.rs
index a9b2910..ddd6b81 100644
--- a/src/multi/generic_multiple_barcode_reader.rs
+++ b/src/multi/generic_multiple_barcode_reader.rs
@@ -56,7 +56,7 @@ impl<T: Reader> MultipleBarcodeReader for GenericMultipleBarcodeReader<T> {
         let mut results = Vec::new();
         self.doDecodeMultiple(image, hints, &mut results, 0, 0, 0);
         if results.is_empty() {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         Ok(results)
     }
diff --git a/src/multi/qrcode/detector/multi_detector.rs b/src/multi/qrcode/detector/multi_detector.rs
index 26eb4f5..4f19cd4 100644
--- a/src/multi/qrcode/detector/multi_detector.rs
+++ b/src/multi/qrcode/detector/multi_detector.rs
@@ -50,7 +50,7 @@ impl<'a> MultiDetector<'_> {
         let infos = finder.findMulti(hints)?;
 
         if infos.is_empty() {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let mut result = Vec::new();
diff --git a/src/multi/qrcode/detector/multi_finder_pattern_finder.rs b/src/multi/qrcode/detector/multi_finder_pattern_finder.rs
index 8065bac..0efe06e 100644
--- a/src/multi/qrcode/detector/multi_finder_pattern_finder.rs
+++ b/src/multi/qrcode/detector/multi_finder_pattern_finder.rs
@@ -92,7 +92,7 @@ impl<'a> MultiFinderPatternFinder<'_> {
 
         if size < 3 {
             // Couldn't find enough finder patterns
-            return Err(Exceptions::notFoundWith(
+            return Err(Exceptions::not_found_with(
                 "Couldn't find enough finder patterns",
             ));
         }
@@ -212,7 +212,7 @@ impl<'a> MultiFinderPatternFinder<'_> {
         if !results.is_empty() {
             Ok(results)
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 
diff --git a/src/multi/qrcode/qr_code_multi_reader.rs b/src/multi/qrcode/qr_code_multi_reader.rs
index 4b8b259..3500138 100644
--- a/src/multi/qrcode/qr_code_multi_reader.rs
+++ b/src/multi/qrcode/qr_code_multi_reader.rs
@@ -111,7 +111,7 @@ impl MultipleBarcodeReader for QRCodeMultiReader {
                 // ignore and continue
                 continue;
             } else {
-                return Err(output.err().unwrap_or(Exceptions::notFound));
+                return Err(output.err().unwrap_or(Exceptions::NOT_FOUND));
             }
         }
 
diff --git a/src/multi_format_reader.rs b/src/multi_format_reader.rs
index 23cd8d9..14b7951 100644
--- a/src/multi_format_reader.rs
+++ b/src/multi_format_reader.rs
@@ -187,6 +187,6 @@ impl MultiFormatReader {
                 }
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 }
diff --git a/src/multi_format_writer.rs b/src/multi_format_writer.rs
index fecf30e..d0f164a 100644
--- a/src/multi_format_writer.rs
+++ b/src/multi_format_writer.rs
@@ -72,7 +72,7 @@ impl Writer for MultiFormatWriter {
             BarcodeFormat::DATA_MATRIX => Box::<DataMatrixWriter>::default(),
             BarcodeFormat::AZTEC => Box::<AztecWriter>::default(),
             _ => {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "No encoder available for format {format:?}"
                 )))
             }
diff --git a/src/oned/coda_bar_reader.rs b/src/oned/coda_bar_reader.rs
index c16a0d1..1bcd852 100644
--- a/src/oned/coda_bar_reader.rs
+++ b/src/oned/coda_bar_reader.rs
@@ -65,13 +65,13 @@ impl OneDReader for CodaBarReader {
         loop {
             let charOffset = self.toNarrowWidePattern(nextStart);
             if charOffset == -1 {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             // Hack: We store the position in the alphabet table into a
             // StringBuilder, so that we can access the decoded patterns in
             // validatePattern. We'll translate to the actual characters later.
             self.decodeRowRXingResult
-                .push(char::from_u32(charOffset as u32).ok_or(Exceptions::parse)?);
+                .push(char::from_u32(charOffset as u32).ok_or(Exceptions::PARSE)?);
             nextStart += 8;
             // Stop as soon as we see the end character.
             if self.decodeRowRXingResult.chars().count() > 1
@@ -99,7 +99,7 @@ impl OneDReader for CodaBarReader {
         // otherwise this is probably a false positive. The exception is if we are
         // at the end of the row. (I.e. the barcode barely fits.)
         if nextStart < self.counterLength && trailingWhitespace < lastPatternSize / 2 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         self.validatePattern(startOffset)?;
@@ -113,7 +113,7 @@ impl OneDReader for CodaBarReader {
                     .decodeRowRXingResult
                     .chars()
                     .nth(i)
-                    .ok_or(Exceptions::indexOutOfBounds)? as usize]
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as usize]
                     .to_string(),
             );
         }
@@ -122,23 +122,23 @@ impl OneDReader for CodaBarReader {
             .decodeRowRXingResult
             .chars()
             .next()
-            .ok_or(Exceptions::indexOutOfBounds)?;
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
         if !Self::arrayContains(&Self::STARTEND_ENCODING, startchar) {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         let endchar = self
             .decodeRowRXingResult
             .chars()
             .nth(self.decodeRowRXingResult.chars().count() - 1)
-            .ok_or(Exceptions::indexOutOfBounds)?;
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
         if !Self::arrayContains(&Self::STARTEND_ENCODING, endchar) {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         // remove stop/start characters character and check if a long enough string is contained
         if (self.decodeRowRXingResult.chars().count()) <= Self::MIN_CHARACTER_LENGTH as usize {
             // Almost surely a false positive ( start + stop + at least 1 character)
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         if !matches!(
@@ -242,7 +242,7 @@ impl CodaBarReader {
                 .decodeRowRXingResult
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 as usize];
             for j in (0_usize..=6).rev() {
                 // Even j = bars, while odd j = spaces. Categories 2 and 3 are for
@@ -281,7 +281,7 @@ impl CodaBarReader {
                 .decodeRowRXingResult
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 as usize];
             for j in (0usize..=6).rev() {
                 // Even j = bars, while odd j = spaces. Categories 2 and 3 are for
@@ -289,7 +289,7 @@ impl CodaBarReader {
                 let category = (j & 1) + ((pattern as usize) & 1) * 2;
                 let size = self.counters[(pos + j)];
                 if (size as f32) < mins[category] || (size as f32) > maxes[category] {
-                    return Err(Exceptions::notFound);
+                    return Err(Exceptions::NOT_FOUND);
                 }
                 pattern >>= 1;
             }
@@ -310,7 +310,7 @@ impl CodaBarReader {
         let mut i = row.getNextUnset(0);
         let end = row.getSize();
         if i >= end {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         let mut isWhite = true;
         let mut count = 0;
@@ -362,7 +362,7 @@ impl CodaBarReader {
 
             i += 2;
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     pub fn arrayContains(array: &[char], key: char) -> bool {
diff --git a/src/oned/coda_bar_writer.rs b/src/oned/coda_bar_writer.rs
index a57a4a9..5e08701 100644
--- a/src/oned/coda_bar_writer.rs
+++ b/src/oned/coda_bar_writer.rs
@@ -44,12 +44,12 @@ impl OneDimensionalCodeWriter for CodaBarWriter {
             let firstChar = contents
                 .chars()
                 .next()
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_ascii_uppercase();
             let lastChar = contents
                 .chars()
                 .nth(contents.chars().count() - 1)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_ascii_uppercase();
             let startsNormal = CodaBarReader::arrayContains(&START_END_CHARS, firstChar);
             let endsNormal = CodaBarReader::arrayContains(&START_END_CHARS, lastChar);
@@ -57,7 +57,7 @@ impl OneDimensionalCodeWriter for CodaBarWriter {
             let endsAlt = CodaBarReader::arrayContains(&ALT_START_END_CHARS, lastChar);
             if startsNormal {
                 if !endsNormal {
-                    return Err(Exceptions::illegalArgumentWith(format!(
+                    return Err(Exceptions::illegal_argument_with(format!(
                         "Invalid start/end guards: {contents}"
                     )));
                 }
@@ -65,7 +65,7 @@ impl OneDimensionalCodeWriter for CodaBarWriter {
                 contents.to_owned()
             } else if startsAlt {
                 if !endsAlt {
-                    return Err(Exceptions::illegalArgumentWith(format!(
+                    return Err(Exceptions::illegal_argument_with(format!(
                         "Invalid start/end guards: {contents}"
                     )));
                 }
@@ -74,7 +74,7 @@ impl OneDimensionalCodeWriter for CodaBarWriter {
             } else {
                 // Doesn't start with a guard
                 if endsNormal || endsAlt {
-                    return Err(Exceptions::illegalArgumentWith(format!(
+                    return Err(Exceptions::illegal_argument_with(format!(
                         "Invalid start/end guards: {contents}"
                     )));
                 }
@@ -94,7 +94,7 @@ impl OneDimensionalCodeWriter for CodaBarWriter {
             ) {
                 resultLength += 10;
             } else {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "Cannot encode : '{ch}'"
                 )));
             }
@@ -109,7 +109,7 @@ impl OneDimensionalCodeWriter for CodaBarWriter {
             let mut c = contents
                 .chars()
                 .nth(index)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_ascii_uppercase();
             if index == 0 || index == contents.chars().count() - 1 {
                 // The start/end chars are not in the CodaBarReader.ALPHABET.
diff --git a/src/oned/code_128_reader.rs b/src/oned/code_128_reader.rs
index ed6d8b8..bbf46e2 100644
--- a/src/oned/code_128_reader.rs
+++ b/src/oned/code_128_reader.rs
@@ -53,7 +53,7 @@ impl OneDReader for Code128Reader {
             CODE_START_A => CODE_CODE_A,
             CODE_START_B => CODE_CODE_B,
             CODE_START_C => CODE_CODE_C,
-            _ => return Err(Exceptions::format),
+            _ => return Err(Exceptions::FORMAT),
         };
 
         let mut done = false;
@@ -103,7 +103,7 @@ impl OneDReader for Code128Reader {
 
             // Take care of illegal start codes
             match code {
-                CODE_START_A | CODE_START_B | CODE_START_C => return Err(Exceptions::format),
+                CODE_START_A | CODE_START_B | CODE_START_C => return Err(Exceptions::FORMAT),
                 _ => {}
             }
 
@@ -297,21 +297,21 @@ impl OneDReader for Code128Reader {
             row.getSize().min(nextStart + (nextStart - lastStart) / 2),
             false,
         )? {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         // Pull out from sum the value of the penultimate check code
         checksumTotal -= multiplier as usize * lastCode as usize;
         // lastCode is the checksum then:
         if (checksumTotal % 103) as u8 != lastCode {
-            return Err(Exceptions::checksum);
+            return Err(Exceptions::CHECKSUM);
         }
 
         // Need to pull out the check digits from string
         let resultLength = result.chars().count();
         if resultLength == 0 {
             // false positive
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         // Only bother if the result had at least one character, and if the checksum digit happened to
@@ -332,7 +332,7 @@ impl OneDReader for Code128Reader {
         let rawCodesSize = rawCodes.len();
         let mut rawBytes = vec![0u8; rawCodesSize];
         for (i, rawByte) in rawBytes.iter_mut().enumerate().take(rawCodesSize) {
-            *rawByte = *rawCodes.get(i).ok_or(Exceptions::indexOutOfBounds)?;
+            *rawByte = *rawCodes.get(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
         }
         let mut resultObject = RXingResult::new(
             &result,
@@ -406,7 +406,7 @@ impl Code128Reader {
             }
         }
 
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     fn decodeCode(&self, row: &BitArray, counters: &mut [u32; 6], rowOffset: usize) -> Result<u8> {
@@ -426,7 +426,7 @@ impl Code128Reader {
         if bestMatch >= 0 {
             Ok(bestMatch as u8)
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 }
diff --git a/src/oned/code_128_writer.rs b/src/oned/code_128_writer.rs
index d6ff6d8..ce6ae5e 100644
--- a/src/oned/code_128_writer.rs
+++ b/src/oned/code_128_writer.rs
@@ -100,7 +100,7 @@ fn check(contents: &str, hints: &crate::EncodingHintDictionary) -> Result<i32> {
     let length = contents.chars().count();
     // Check length
     if !(1..=80).contains(&length) {
-        return Err(Exceptions::illegalArgumentWith(format!(
+        return Err(Exceptions::illegal_argument_with(format!(
             "Contents length should be between 1 and 80 characters, but got {length}"
         )));
     }
@@ -108,13 +108,13 @@ fn check(contents: &str, hints: &crate::EncodingHintDictionary) -> Result<i32> {
     // Check for forced code set hint.
     let mut forcedCodeSet = -1_i32;
     if hints.contains_key(&EncodeHintType::FORCE_CODE_SET) {
-        let Some(EncodeHintValue::ForceCodeSet(codeSetHint)) = hints.get(&EncodeHintType::FORCE_CODE_SET) else { return Err(Exceptions::illegalState) };
+        let Some(EncodeHintValue::ForceCodeSet(codeSetHint)) = hints.get(&EncodeHintType::FORCE_CODE_SET) else { return Err(Exceptions::ILLEGAL_STATE) };
         match codeSetHint.as_str() {
             "A" => forcedCodeSet = CODE_CODE_A as i32,
             "B" => forcedCodeSet = CODE_CODE_B as i32,
             "C" => forcedCodeSet = CODE_CODE_C as i32,
             _ => {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "Unsupported code set hint: {codeSetHint}"
                 )))
             }
@@ -135,7 +135,7 @@ fn check(contents: &str, hints: &crate::EncodingHintDictionary) -> Result<i32> {
                 if c > 127 {
                     // no full Latin-1 character set available at the moment
                     // shift and manual code change are not supported
-                    return Err(Exceptions::illegalArgumentWith(format!(
+                    return Err(Exceptions::illegal_argument_with(format!(
                         "Bad character in input: ASCII value={c}"
                     )));
                 }
@@ -150,7 +150,7 @@ fn check(contents: &str, hints: &crate::EncodingHintDictionary) -> Result<i32> {
             // allows no ascii above 95 (no lower caps, no special symbols)
             {
                 if c > 95 && c <= 127 {
-                    return Err(Exceptions::illegalArgumentWith(format!(
+                    return Err(Exceptions::illegal_argument_with(format!(
                         "Bad character in input for forced code set A: ASCII value={c}"
                     )));
                 }
@@ -159,7 +159,7 @@ fn check(contents: &str, hints: &crate::EncodingHintDictionary) -> Result<i32> {
             // allows no ascii below 32 (terminal symbols)
             {
                 if c <= 32 {
-                    return Err(Exceptions::illegalArgumentWith(format!(
+                    return Err(Exceptions::illegal_argument_with(format!(
                         "Bad character in input for forced code set B: ASCII value={c}"
                     )));
                 }
@@ -173,7 +173,7 @@ fn check(contents: &str, hints: &crate::EncodingHintDictionary) -> Result<i32> {
                     || ch == ESCAPE_FNC_3
                     || ch == ESCAPE_FNC_4
                 {
-                    return Err(Exceptions::illegalArgumentWith(format!(
+                    return Err(Exceptions::illegal_argument_with(format!(
                         "Bad character in input for forced code set C: ASCII value={c}"
                     )));
                 }
@@ -196,7 +196,7 @@ fn encodeFast(contents: &str, forcedCodeSet: i32) -> Result<Vec<bool>> {
     while position < length {
         //Select code to use
         let newCodeSet = if forcedCodeSet == -1 {
-            chooseCode(contents, position, codeSet).ok_or(Exceptions::illegalState)?
+            chooseCode(contents, position, codeSet).ok_or(Exceptions::ILLEGAL_STATE)?
         } else {
             forcedCodeSet as usize // THIS IS RISKY
         };
@@ -209,7 +209,7 @@ fn encodeFast(contents: &str, forcedCodeSet: i32) -> Result<Vec<bool>> {
             match contents
                 .chars()
                 .nth(position)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             {
                 ESCAPE_FNC_1 => patternIndex = CODE_FNC_1 as isize,
                 ESCAPE_FNC_2 => patternIndex = CODE_FNC_2 as isize,
@@ -229,7 +229,7 @@ fn encodeFast(contents: &str, forcedCodeSet: i32) -> Result<Vec<bool>> {
                             patternIndex = contents
                                 .chars()
                                 .nth(position)
-                                .ok_or(Exceptions::indexOutOfBounds)?
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                                 as isize
                                 - ' ' as isize;
                             if patternIndex < 0 {
@@ -241,7 +241,7 @@ fn encodeFast(contents: &str, forcedCodeSet: i32) -> Result<Vec<bool>> {
                             patternIndex = contents
                                 .chars()
                                 .nth(position)
-                                .ok_or(Exceptions::indexOutOfBounds)?
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                                 as isize
                                 - ' ' as isize
                         }
@@ -249,7 +249,7 @@ fn encodeFast(contents: &str, forcedCodeSet: i32) -> Result<Vec<bool>> {
                             // CODE_CODE_C
                             if position + 1 == length {
                                 // this is the last character, but the encoding is C, which always encodes two characers
-                                return Err(Exceptions::illegalArgumentWith(
+                                return Err(Exceptions::illegal_argument_with(
                                     "Bad number of characters for digit only encoding.",
                                 ));
                             }
@@ -260,7 +260,7 @@ fn encodeFast(contents: &str, forcedCodeSet: i32) -> Result<Vec<bool>> {
                                 .map(|(_u, c)| c)
                                 .collect();
                             patternIndex = s.parse::<isize>().map_err(|e| {
-                                Exceptions::parseWith(format!("issue parsing {s}: {e}"))
+                                Exceptions::parse_with(format!("issue parsing {s}: {e}"))
                             })?;
                             position += 1;
                         } // Also incremented below
@@ -536,7 +536,7 @@ stuvwxyz{|}~\u{007F}\u{00FF}";
                 if contents
                     .chars()
                     .nth(i)
-                    .ok_or(Exceptions::indexOutOfBounds)?
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                     == ESCAPE_FNC_1
                 {
                     addPattern(
@@ -556,7 +556,7 @@ stuvwxyz{|}~\u{007F}\u{00FF}";
                     addPattern(
                         &mut patterns,
                         s.parse::<usize>().map_err(|e| {
-                            Exceptions::parseWith(format!("unable to parse {s} {e}"))
+                            Exceptions::parse_with(format!("unable to parse {s} {e}"))
                         })?,
                         &mut checkSum,
                         &mut checkWeight,
@@ -572,7 +572,7 @@ stuvwxyz{|}~\u{007F}\u{00FF}";
                 let mut patternIndex = match contents
                     .chars()
                     .nth(i)
-                    .ok_or(Exceptions::indexOutOfBounds)?
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 {
                     ESCAPE_FNC_1 => CODE_FNC_1 as isize,
                     ESCAPE_FNC_2 => CODE_FNC_2 as isize,
@@ -590,7 +590,7 @@ stuvwxyz{|}~\u{007F}\u{00FF}";
                         contents
                             .chars()
                             .nth(i)
-                            .ok_or(Exceptions::indexOutOfBounds)? as isize
+                            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as isize
                             - ' ' as isize
                     }
                 };
@@ -681,7 +681,7 @@ stuvwxyz{|}~\u{007F}\u{00FF}";
         minPath: &mut Vec<Vec<Latch>>,
     ) -> Result<u32> {
         if position >= contents.chars().count() {
-            return Err(Exceptions::illegalState);
+            return Err(Exceptions::ILLEGAL_STATE);
         }
         let mCost = memoizedCost[charset.ordinal()][position];
         if mCost > 0 {
@@ -762,7 +762,7 @@ stuvwxyz{|}~\u{007F}\u{00FF}";
             }
         }
         if minCost == u32::MAX {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Bad character in input: ASCII value={}",
                 contents.chars().nth(position).unwrap_or('x')
             )));
diff --git a/src/oned/code_39_reader.rs b/src/oned/code_39_reader.rs
index 92ec57b..1096704 100644
--- a/src/oned/code_39_reader.rs
+++ b/src/oned/code_39_reader.rs
@@ -60,7 +60,7 @@ impl OneDReader for Code39Reader {
             one_d_reader::recordPattern(row, nextStart, &mut counters)?;
             let pattern = Self::toNarrowWidePattern(&counters);
             if pattern < 0 {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             decodedChar = Self::patternToChar(pattern as u32)?;
             self.decodeRowRXingResult.push(decodedChar);
@@ -85,7 +85,7 @@ impl OneDReader for Code39Reader {
         // If 50% of last pattern size, following last pattern, is not whitespace, fail
         // (but if it's whitespace to the very end of the image, that's OK)
         if nextStart != end && (whiteSpaceAfterEnd * 2) < lastPatternSize as usize {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         if self.usingCheckDigit {
@@ -96,7 +96,7 @@ impl OneDReader for Code39Reader {
                     self.decodeRowRXingResult
                         .chars()
                         .nth(i)
-                        .ok_or(Exceptions::indexOutOfBounds)?,
+                        .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                 ) {
                     total += pos;
                 }
@@ -105,20 +105,20 @@ impl OneDReader for Code39Reader {
                 .decodeRowRXingResult
                 .chars()
                 .nth(max)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 != Self::ALPHABET_STRING
                     .chars()
                     .nth(total % 43)
-                    .ok_or(Exceptions::indexOutOfBounds)?
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             self.decodeRowRXingResult.truncate(max);
         }
 
         if self.decodeRowRXingResult.chars().count() == 0 {
             // false positive
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let resultString = if self.extendedMode {
@@ -246,7 +246,7 @@ impl Code39Reader {
                 isWhite = !isWhite;
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     // For efficiency, returns -1 on failure. Not throwing here saved as many as 700 exceptions
@@ -306,13 +306,13 @@ impl Code39Reader {
                 return Self::ALPHABET_STRING
                     .chars()
                     .nth(i)
-                    .ok_or(Exceptions::indexOutOfBounds);
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS);
             }
         }
         if pattern == Self::ASTERISK_ENCODING {
             return Ok('*');
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     fn decodeExtended(encoded: &str) -> Result<String> {
@@ -322,46 +322,46 @@ impl Code39Reader {
         while i < length {
             // for i in 0..length {
             // for (int i = 0; i < length; i++) {
-            let c = encoded.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)?;
+            let c = encoded.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
             if c == '+' || c == '$' || c == '%' || c == '/' {
                 let next = encoded
                     .chars()
                     .nth(i + 1)
-                    .ok_or(Exceptions::indexOutOfBounds)?;
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                 let mut decodedChar = '\0';
                 match c {
                     '+' => {
                         // +A to +Z map to a to z
                         if ('A'..='Z').contains(&next) {
                             decodedChar = char::from_u32(next as u32 + 32)
-                                .ok_or(Exceptions::indexOutOfBounds)?;
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                         } else {
-                            return Err(Exceptions::notFound);
+                            return Err(Exceptions::NOT_FOUND);
                         }
                     }
                     '$' => {
                         // $A to $Z map to control codes SH to SB
                         if ('A'..='Z').contains(&next) {
                             decodedChar = char::from_u32(next as u32 - 64)
-                                .ok_or(Exceptions::indexOutOfBounds)?;
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                         } else {
-                            return Err(Exceptions::notFound);
+                            return Err(Exceptions::NOT_FOUND);
                         }
                     }
                     '%' => {
                         // %A to %E map to control codes ESC to US
                         if ('A'..='E').contains(&next) {
                             decodedChar = char::from_u32(next as u32 - 38)
-                                .ok_or(Exceptions::indexOutOfBounds)?;
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                         } else if ('F'..='J').contains(&next) {
                             decodedChar = char::from_u32(next as u32 - 11)
-                                .ok_or(Exceptions::indexOutOfBounds)?;
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                         } else if ('K'..='O').contains(&next) {
                             decodedChar = char::from_u32(next as u32 + 16)
-                                .ok_or(Exceptions::indexOutOfBounds)?;
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                         } else if ('P'..='T').contains(&next) {
                             decodedChar = char::from_u32(next as u32 + 43)
-                                .ok_or(Exceptions::indexOutOfBounds)?;
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                         } else if next == 'U' {
                             decodedChar = 0 as char;
                         } else if next == 'V' {
@@ -371,18 +371,18 @@ impl Code39Reader {
                         } else if next == 'X' || next == 'Y' || next == 'Z' {
                             decodedChar = 127 as char;
                         } else {
-                            return Err(Exceptions::notFound);
+                            return Err(Exceptions::NOT_FOUND);
                         }
                     }
                     '/' => {
                         // /A to /O map to ! to , and /Z maps to :
                         if ('A'..='O').contains(&next) {
                             decodedChar = char::from_u32(next as u32 - 32)
-                                .ok_or(Exceptions::indexOutOfBounds)?;
+                                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                         } else if next == 'Z' {
                             decodedChar = ':';
                         } else {
-                            return Err(Exceptions::notFound);
+                            return Err(Exceptions::NOT_FOUND);
                         }
                     }
                     _ => {}
diff --git a/src/oned/code_39_writer.rs b/src/oned/code_39_writer.rs
index 9e98ff5..e6cfd1b 100644
--- a/src/oned/code_39_writer.rs
+++ b/src/oned/code_39_writer.rs
@@ -34,7 +34,7 @@ impl OneDimensionalCodeWriter for Code39Writer {
         let mut contents = contents.to_owned();
         let mut length = contents.chars().count();
         if length > 80 {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Requested contents should be less than 80 digits long, but got {length}"
             )));
         }
@@ -48,14 +48,14 @@ impl OneDimensionalCodeWriter for Code39Writer {
                     contents
                         .chars()
                         .nth(i)
-                        .ok_or(Exceptions::indexOutOfBounds)?,
+                        .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                 )
                 .is_none()
             {
                 contents = Self::tryToConvertToExtendedMode(&contents)?;
                 length = contents.chars().count();
                 if length > 80 {
-                    return Err(Exceptions::illegalArgumentWith(format!("Requested contents should be less than 80 digits long, but got {length} (extended full ASCII mode)")));
+                    return Err(Exceptions::illegal_argument_with(format!("Requested contents should be less than 80 digits long, but got {length} (extended full ASCII mode)")));
                 }
                 break;
             }
@@ -71,7 +71,7 @@ impl OneDimensionalCodeWriter for Code39Writer {
         pos += Self::appendPattern(&mut result, pos as usize, &narrowWhite, false);
         //append next character to byte matrix
         for i in 0..length {
-            let Some(indexInString) = Code39Reader::ALPHABET_STRING.find(contents.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)?) else {
+            let Some(indexInString) = Code39Reader::ALPHABET_STRING.find(contents.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?) else {
               continue;
             };
             Self::toIntArray(
@@ -118,56 +118,56 @@ impl Code39Writer {
                         extendedContent.push('$');
                         extendedContent.push(
                             char::from_u32('A' as u32 + (character as u32 - 1))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else if character < ' ' {
                         extendedContent.push('%');
                         extendedContent.push(
                             char::from_u32('A' as u32 + (character as u32 - 27))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else if character <= ',' || character == '/' || character == ':' {
                         extendedContent.push('/');
                         extendedContent.push(
                             char::from_u32('A' as u32 + (character as u32 - 33))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else if character <= '9' {
                         extendedContent.push(
                             char::from_u32('0' as u32 + (character as u32 - 48))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else if character <= '?' {
                         extendedContent.push('%');
                         extendedContent.push(
                             char::from_u32('F' as u32 + (character as u32 - 59))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else if character <= 'Z' {
                         extendedContent.push(
                             char::from_u32('A' as u32 + (character as u32 - 65))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else if character <= '_' {
                         extendedContent.push('%');
                         extendedContent.push(
                             char::from_u32('K' as u32 + (character as u32 - 91))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else if character <= 'z' {
                         extendedContent.push('+');
                         extendedContent.push(
                             char::from_u32('A' as u32 + (character as u32 - 97))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else if character as u32 <= 127 {
                         extendedContent.push('%');
                         extendedContent.push(
                             char::from_u32('P' as u32 + (character as u32 - 123))
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else {
-                        return Err(Exceptions::illegalArgumentWith(format!(
+                        return Err(Exceptions::illegal_argument_with(format!(
                             "Requested content contains a non-encodable character: '{character}'"
                         )));
                     }
diff --git a/src/oned/code_93_reader.rs b/src/oned/code_93_reader.rs
index 4961a4d..3d4216a 100644
--- a/src/oned/code_93_reader.rs
+++ b/src/oned/code_93_reader.rs
@@ -66,7 +66,7 @@ impl OneDReader for Code93Reader {
             one_d_reader::recordPattern(row, nextStart, &mut theCounters)?;
             let pattern = Self::toPattern(&theCounters);
             if pattern < 0 {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             decodedChar = Self::patternToChar(pattern as u32)?;
             self.decodeRowRXingResult.push(decodedChar);
@@ -95,12 +95,12 @@ impl OneDReader for Code93Reader {
 
         // Should be at least one more black module
         if nextStart == end || !row.get(nextStart) {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         if self.decodeRowRXingResult.chars().count() < 2 {
             // false positive -- need at least 2 checksum digits
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         Self::checkChecksums(&self.decodeRowRXingResult)?;
@@ -194,7 +194,7 @@ impl Code93Reader {
                 isWhite = !isWhite;
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     fn toPattern(counters: &[u32; 6]) -> i32 {
@@ -224,7 +224,7 @@ impl Code93Reader {
                 return Ok(Self::ALPHABET[i]);
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     fn decodeExtended(encoded: &str) -> Result<String> {
@@ -234,52 +234,52 @@ impl Code93Reader {
         while i < length {
             // for i in 0..length {
             // for (int i = 0; i < length; i++) {
-            let c = encoded.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)?;
+            let c = encoded.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
             if ('a'..='d').contains(&c) {
                 if i >= length - 1 {
-                    return Err(Exceptions::format);
+                    return Err(Exceptions::FORMAT);
                 }
                 let next = encoded
                     .chars()
                     .nth(i + 1)
-                    .ok_or(Exceptions::indexOutOfBounds)?;
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
                 let mut decodedChar = '\0';
                 match c {
                     'd' => {
                         // +A to +Z map to a to z
                         if ('A'..='Z').contains(&next) {
                             decodedChar =
-                                char::from_u32(next as u32 + 32).ok_or(Exceptions::parse)?;
+                                char::from_u32(next as u32 + 32).ok_or(Exceptions::PARSE)?;
                         } else {
-                            return Err(Exceptions::format);
+                            return Err(Exceptions::FORMAT);
                         }
                     }
                     'a' => {
                         // $A to $Z map to control codes SH to SB
                         if ('A'..='Z').contains(&next) {
                             decodedChar =
-                                char::from_u32(next as u32 - 64).ok_or(Exceptions::parse)?;
+                                char::from_u32(next as u32 - 64).ok_or(Exceptions::PARSE)?;
                         } else {
-                            return Err(Exceptions::format);
+                            return Err(Exceptions::FORMAT);
                         }
                     }
                     'b' => {
                         if ('A'..='E').contains(&next) {
                             // %A to %E map to control codes ESC to USep
                             decodedChar =
-                                char::from_u32(next as u32 - 38).ok_or(Exceptions::parse)?;
+                                char::from_u32(next as u32 - 38).ok_or(Exceptions::PARSE)?;
                         } else if ('F'..='J').contains(&next) {
                             // %F to %J map to ; < = > ?
                             decodedChar =
-                                char::from_u32(next as u32 - 11).ok_or(Exceptions::parse)?;
+                                char::from_u32(next as u32 - 11).ok_or(Exceptions::PARSE)?;
                         } else if ('K'..='O').contains(&next) {
                             // %K to %O map to [ \ ] ^ _
                             decodedChar =
-                                char::from_u32(next as u32 + 16).ok_or(Exceptions::parse)?;
+                                char::from_u32(next as u32 + 16).ok_or(Exceptions::PARSE)?;
                         } else if ('P'..='T').contains(&next) {
                             // %P to %T map to { | } ~ DEL
                             decodedChar =
-                                char::from_u32(next as u32 + 43).ok_or(Exceptions::parse)?;
+                                char::from_u32(next as u32 + 43).ok_or(Exceptions::PARSE)?;
                         } else if next == 'U' {
                             // %U map to NUL
                             decodedChar = '\0';
@@ -293,18 +293,18 @@ impl Code93Reader {
                             // %X to %Z all map to DEL (127)
                             decodedChar = 127 as char;
                         } else {
-                            return Err(Exceptions::format);
+                            return Err(Exceptions::FORMAT);
                         }
                     }
                     'c' => {
                         // /A to /O map to ! to , and /Z maps to :
                         if ('A'..='O').contains(&next) {
                             decodedChar =
-                                char::from_u32(next as u32 - 32).ok_or(Exceptions::parse)?;
+                                char::from_u32(next as u32 - 32).ok_or(Exceptions::PARSE)?;
                         } else if next == 'Z' {
                             decodedChar = ':';
                         } else {
-                            return Err(Exceptions::format);
+                            return Err(Exceptions::FORMAT);
                         }
                     }
                     _ => {}
@@ -334,7 +334,7 @@ impl Code93Reader {
         for i in (0..checkPosition).rev() {
             total += weight
                 * Self::ALPHABET_STRING
-                    .find(result.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)?)
+                    .find(result.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?)
                     .map_or_else(|| -1_i32, |v| v as i32);
             weight += 1;
             if weight > weightMax as i32 {
@@ -344,10 +344,10 @@ impl Code93Reader {
         if result
             .chars()
             .nth(checkPosition)
-            .ok_or(Exceptions::indexOutOfBounds)?
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             != Self::ALPHABET[(total as usize) % 47]
         {
-            Err(Exceptions::checksum)
+            Err(Exceptions::CHECKSUM)
         } else {
             Ok(())
         }
diff --git a/src/oned/code_93_writer.rs b/src/oned/code_93_writer.rs
index 740469b..2da2579 100644
--- a/src/oned/code_93_writer.rs
+++ b/src/oned/code_93_writer.rs
@@ -36,7 +36,7 @@ impl OneDimensionalCodeWriter for Code93Writer {
         let mut contents = Self::convertToExtended(contents)?;
         let length = contents.chars().count();
         if length > 80 {
-            return Err(Exceptions::illegalArgumentWith(format!("Requested contents should be less than 80 digits long after converting to extended encoding, but got {length}" )));
+            return Err(Exceptions::illegal_argument_with(format!("Requested contents should be less than 80 digits long after converting to extended encoding, but got {length}" )));
         }
 
         //length of code + 2 start/stop characters + 2 checksums, each of 9 bits, plus a termination bar
@@ -49,7 +49,7 @@ impl OneDimensionalCodeWriter for Code93Writer {
 
         for i in 0..length {
             // for (int i = 0; i < length; i++) {
-            let Some(indexInString) = Code93Reader::ALPHABET_STRING.find(contents.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)?) else {panic!("alphabet")};
+            let Some(indexInString) = Code93Reader::ALPHABET_STRING.find(contents.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?) else {panic!("alphabet")};
             pos += Self::appendPattern(
                 &mut result,
                 pos,
@@ -66,7 +66,7 @@ impl OneDimensionalCodeWriter for Code93Writer {
             Code93Reader::ALPHABET_STRING
                 .chars()
                 .nth(check1)
-                .ok_or(Exceptions::indexOutOfBounds)?,
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
         );
 
         let check2 = Self::computeChecksumIndex(&contents, 15);
@@ -157,13 +157,13 @@ impl Code93Writer {
                 // SOH - SUB: ($)A - ($)Z
                 extendedContent.push('a');
                 extendedContent.push(
-                    char::from_u32('A' as u32 + character as u32 - 1).ok_or(Exceptions::parse)?,
+                    char::from_u32('A' as u32 + character as u32 - 1).ok_or(Exceptions::PARSE)?,
                 );
             } else if character as u32 <= 31 {
                 // ESC - US: (%)A - (%)E
                 extendedContent.push('b');
                 extendedContent.push(
-                    char::from_u32('A' as u32 + character as u32 - 27).ok_or(Exceptions::parse)?,
+                    char::from_u32('A' as u32 + character as u32 - 27).ok_or(Exceptions::PARSE)?,
                 );
             } else if character == ' ' || character == '$' || character == '%' || character == '+' {
                 // space $ % +
@@ -173,7 +173,7 @@ impl Code93Writer {
                 extendedContent.push('c');
                 extendedContent.push(
                     char::from_u32('A' as u32 + character as u32 - '!' as u32)
-                        .ok_or(Exceptions::parse)?,
+                        .ok_or(Exceptions::PARSE)?,
                 );
             } else if character <= '9' {
                 extendedContent.push(character);
@@ -185,7 +185,7 @@ impl Code93Writer {
                 extendedContent.push('b');
                 extendedContent.push(
                     char::from_u32('F' as u32 + character as u32 - ';' as u32)
-                        .ok_or(Exceptions::parse)?,
+                        .ok_or(Exceptions::PARSE)?,
                 );
             } else if character == '@' {
                 // @: (%)V
@@ -198,7 +198,7 @@ impl Code93Writer {
                 extendedContent.push('b');
                 extendedContent.push(
                     char::from_u32('K' as u32 + character as u32 - '[' as u32)
-                        .ok_or(Exceptions::parse)?,
+                        .ok_or(Exceptions::PARSE)?,
                 );
             } else if character == '`' {
                 // `: (%)W
@@ -208,17 +208,17 @@ impl Code93Writer {
                 extendedContent.push('d');
                 extendedContent.push(
                     char::from_u32('A' as u32 + character as u32 - 'a' as u32)
-                        .ok_or(Exceptions::parse)?,
+                        .ok_or(Exceptions::PARSE)?,
                 );
             } else if character as u32 <= 127 {
                 // { - DEL: (%)P - (%)T
                 extendedContent.push('b');
                 extendedContent.push(
                     char::from_u32('P' as u32 + character as u32 - '{' as u32)
-                        .ok_or(Exceptions::parse)?,
+                        .ok_or(Exceptions::PARSE)?,
                 );
             } else {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "Requested content contains a non-encodable character: '{character}'"
                 )));
             }
diff --git a/src/oned/ean_13_reader.rs b/src/oned/ean_13_reader.rs
index 1af520c..8c589bf 100644
--- a/src/oned/ean_13_reader.rs
+++ b/src/oned/ean_13_reader.rs
@@ -66,7 +66,7 @@ impl UPCEANReader for EAN13Reader {
                 &upc_ean_reader::L_AND_G_PATTERNS,
             )?;
             resultString
-                .push(char::from_u32('0' as u32 + bestMatch as u32 % 10).ok_or(Exceptions::parse)?);
+                .push(char::from_u32('0' as u32 + bestMatch as u32 % 10).ok_or(Exceptions::PARSE)?);
 
             rowOffset += counters.iter().sum::<u32>() as usize;
 
@@ -89,7 +89,7 @@ impl UPCEANReader for EAN13Reader {
             let bestMatch =
                 self.decodeDigit(row, &mut counters, rowOffset, &upc_ean_reader::L_PATTERNS)?;
             resultString
-                .push(char::from_u32('0' as u32 + bestMatch as u32).ok_or(Exceptions::parse)?);
+                .push(char::from_u32('0' as u32 + bestMatch as u32).ok_or(Exceptions::PARSE)?);
 
             rowOffset += counters.iter().sum::<u32>() as usize;
 
@@ -148,11 +148,11 @@ impl EAN13Reader {
             if lgPatternFound == Self::FIRST_DIGIT_ENCODINGS[d] {
                 resultString.insert(
                     0,
-                    char::from_u32('0' as u32 + d as u32).ok_or(Exceptions::parse)?,
+                    char::from_u32('0' as u32 + d as u32).ok_or(Exceptions::PARSE)?,
                 );
                 return Ok(());
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 }
diff --git a/src/oned/ean_13_writer.rs b/src/oned/ean_13_writer.rs
index 23e5d5a..3a94b21 100644
--- a/src/oned/ean_13_writer.rs
+++ b/src/oned/ean_13_writer.rs
@@ -46,13 +46,13 @@ impl OneDimensionalCodeWriter for EAN13Writer {
             }
             13 => {
                 if !reader.checkStandardUPCEANChecksum(&contents)? {
-                    return Err(Exceptions::illegalArgumentWith(
+                    return Err(Exceptions::illegal_argument_with(
                         "Contents do not pass checksum",
                     ));
                 }
             }
             _ => {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "Requested contents should be 12 or 13 digits long, but got {length}"
                 )))
             }
@@ -63,9 +63,9 @@ impl OneDimensionalCodeWriter for EAN13Writer {
         let firstDigit = contents
             .chars()
             .next()
-            .ok_or(Exceptions::indexOutOfBounds)?
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             .to_digit(10)
-            .ok_or(Exceptions::parse)? as usize;
+            .ok_or(Exceptions::PARSE)? as usize;
         let parities = EAN13Reader::FIRST_DIGIT_ENCODINGS[firstDigit];
         let mut result = [false; CODE_WIDTH];
         let mut pos = 0;
@@ -80,9 +80,9 @@ impl OneDimensionalCodeWriter for EAN13Writer {
             let mut digit = contents
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_digit(10)
-                .ok_or(Exceptions::parse)? as usize;
+                .ok_or(Exceptions::PARSE)? as usize;
             if (parities >> (6 - i) & 1) == 1 {
                 digit += 10;
             }
@@ -101,9 +101,9 @@ impl OneDimensionalCodeWriter for EAN13Writer {
             let digit = contents
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_digit(10)
-                .ok_or(Exceptions::parse)? as usize;
+                .ok_or(Exceptions::PARSE)? as usize;
 
             pos += EAN13Writer::appendPattern(
                 &mut result,
diff --git a/src/oned/ean_8_reader.rs b/src/oned/ean_8_reader.rs
index 890cbcb..99a76be 100644
--- a/src/oned/ean_8_reader.rs
+++ b/src/oned/ean_8_reader.rs
@@ -54,7 +54,7 @@ impl UPCEANReader for EAN8Reader {
             let bestMatch =
                 self.decodeDigit(row, &mut counters, rowOffset, &upc_ean_reader::L_PATTERNS)?;
             resultString
-                .push(char::from_u32('0' as u32 + bestMatch as u32).ok_or(Exceptions::parse)?);
+                .push(char::from_u32('0' as u32 + bestMatch as u32).ok_or(Exceptions::PARSE)?);
 
             rowOffset += counters.iter().sum::<u32>() as usize;
 
@@ -70,7 +70,7 @@ impl UPCEANReader for EAN8Reader {
             let bestMatch =
                 self.decodeDigit(row, &mut counters, rowOffset, &upc_ean_reader::L_PATTERNS)?;
             resultString
-                .push(char::from_u32('0' as u32 + bestMatch as u32).ok_or(Exceptions::parse)?);
+                .push(char::from_u32('0' as u32 + bestMatch as u32).ok_or(Exceptions::PARSE)?);
 
             rowOffset += counters.iter().sum::<u32>() as usize;
             x += 1;
diff --git a/src/oned/ean_8_writer.rs b/src/oned/ean_8_writer.rs
index 50d9d96..1553c2f 100644
--- a/src/oned/ean_8_writer.rs
+++ b/src/oned/ean_8_writer.rs
@@ -56,13 +56,13 @@ impl OneDimensionalCodeWriter for EAN8Writer {
             }
             8 => {
                 if !EAN8Reader.checkStandardUPCEANChecksum(&contents)? {
-                    return Err(Exceptions::illegalArgumentWith(
+                    return Err(Exceptions::illegal_argument_with(
                         "Contents do not pass checksum",
                     ));
                 }
             }
             _ => {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "Requested contents should be 7 or 8 digits long, but got {length}"
                 )))
             }
@@ -81,9 +81,9 @@ impl OneDimensionalCodeWriter for EAN8Writer {
             let digit = contents
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_digit(10)
-                .ok_or(Exceptions::indexOutOfBounds)? as usize;
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as usize;
             pos += Self::appendPattern(&mut result, pos, &upc_ean_reader::L_PATTERNS[digit], false)
                 as usize;
         }
@@ -96,9 +96,9 @@ impl OneDimensionalCodeWriter for EAN8Writer {
             let digit = contents
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_digit(10)
-                .ok_or(Exceptions::indexOutOfBounds)? as usize;
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as usize;
             pos += Self::appendPattern(&mut result, pos, &upc_ean_reader::L_PATTERNS[digit], true)
                 as usize;
         }
diff --git a/src/oned/itf_reader.rs b/src/oned/itf_reader.rs
index 8b36565..efe6625 100644
--- a/src/oned/itf_reader.rs
+++ b/src/oned/itf_reader.rs
@@ -143,7 +143,7 @@ impl OneDReader for ITFReader {
             lengthOK = true;
         }
         if !lengthOK {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
 
         let mut resultObject = RXingResult::new(
@@ -198,9 +198,9 @@ impl ITFReader {
             }
 
             let mut bestMatch = self.decodeDigit(&counterBlack)?;
-            resultString.push(char::from_u32('0' as u32 + bestMatch).ok_or(Exceptions::parse)?);
+            resultString.push(char::from_u32('0' as u32 + bestMatch).ok_or(Exceptions::PARSE)?);
             bestMatch = self.decodeDigit(&counterWhite)?;
-            resultString.push(char::from_u32('0' as u32 + bestMatch).ok_or(Exceptions::parse)?);
+            resultString.push(char::from_u32('0' as u32 + bestMatch).ok_or(Exceptions::PARSE)?);
 
             payloadStart += counterDigitPair.iter().sum::<u32>() as usize;
         }
@@ -261,7 +261,7 @@ impl ITFReader {
 
         if quietCount != 0 {
             // Unable to find the necessary number of quiet zone pixels.
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         } else {
             Ok(())
         }
@@ -278,7 +278,7 @@ impl ITFReader {
         let width = row.getSize();
         let endStart = row.getNextSet(0);
         if endStart == width {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         Ok(endStart)
@@ -373,7 +373,7 @@ impl ITFReader {
                 isWhite = !isWhite;
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     /**
@@ -402,7 +402,7 @@ impl ITFReader {
         if bestMatch >= 0 {
             Ok(bestMatch as u32 % 10)
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 }
diff --git a/src/oned/itf_writer.rs b/src/oned/itf_writer.rs
index a50bf25..efdd68e 100644
--- a/src/oned/itf_writer.rs
+++ b/src/oned/itf_writer.rs
@@ -33,12 +33,12 @@ impl OneDimensionalCodeWriter for ITFWriter {
     fn encode_oned(&self, contents: &str) -> Result<Vec<bool>> {
         let length = contents.chars().count();
         if length % 2 != 0 {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "The length of the input should be even",
             ));
         }
         if length > 80 {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Requested contents should be less than 80 digits long, but got {length}"
             )));
         }
@@ -52,15 +52,15 @@ impl OneDimensionalCodeWriter for ITFWriter {
             let one = contents
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_digit(10)
-                .ok_or(Exceptions::parse)? as usize;
+                .ok_or(Exceptions::PARSE)? as usize;
             let two = contents
                 .chars()
                 .nth(i + 1)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_digit(10)
-                .ok_or(Exceptions::parse)? as usize;
+                .ok_or(Exceptions::PARSE)? as usize;
             let mut encoding = [0; 10];
             for j in 0..5 {
                 encoding[2 * j] = PATTERNS[one][j];
diff --git a/src/oned/multi_format_one_d_reader.rs b/src/oned/multi_format_one_d_reader.rs
index 2400e6b..9647b1a 100644
--- a/src/oned/multi_format_one_d_reader.rs
+++ b/src/oned/multi_format_one_d_reader.rs
@@ -47,7 +47,7 @@ impl OneDReader for MultiFormatOneDReader {
             }
         }
 
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 }
 impl MultiFormatOneDReader {
@@ -166,7 +166,7 @@ impl Reader for MultiFormatOneDReader {
 
             Ok(result)
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 
diff --git a/src/oned/multi_format_upc_ean_reader.rs b/src/oned/multi_format_upc_ean_reader.rs
index 2284695..2743157 100644
--- a/src/oned/multi_format_upc_ean_reader.rs
+++ b/src/oned/multi_format_upc_ean_reader.rs
@@ -135,7 +135,7 @@ impl OneDReader for MultiFormatUPCEANReader {
             }
         }
 
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 }
 
@@ -198,7 +198,7 @@ impl Reader for MultiFormatUPCEANReader {
 
             Ok(result)
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 
diff --git a/src/oned/one_d_code_writer.rs b/src/oned/one_d_code_writer.rs
index 463a9fc..a73b59e 100644
--- a/src/oned/one_d_code_writer.rs
+++ b/src/oned/one_d_code_writer.rs
@@ -101,7 +101,7 @@ pub trait OneDimensionalCodeWriter: Writer {
      */
     fn checkNumeric(contents: &str) -> Result<()> {
         if !NUMERIC.is_match(contents) {
-            Err(Exceptions::illegalArgumentWith(
+            Err(Exceptions::illegal_argument_with(
                 "Input should only contain digits 0-9",
             ))
         } else {
@@ -164,17 +164,17 @@ impl Writer for L {
         hints: &crate::EncodingHintDictionary,
     ) -> Result<crate::common::BitMatrix> {
         if contents.is_empty() {
-            return Err(Exceptions::illegalArgumentWith("Found empty contents"));
+            return Err(Exceptions::illegal_argument_with("Found empty contents"));
         }
 
         if width < 0 || height < 0 {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Negative size is not allowed. Input: {width}x{height}"
             )));
         }
         if let Some(supportedFormats) = self.getSupportedWriteFormats() {
             if !supportedFormats.contains(format) {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "Can only encode {supportedFormats:?}, but got {format:?}"
                 )));
             }
@@ -183,7 +183,7 @@ impl Writer for L {
         let mut sidesMargin = self.getDefaultMargin();
         if let Some(EncodeHintValue::Margin(margin)) = hints.get(&EncodeHintType::MARGIN) {
             sidesMargin = margin.parse::<u32>().map_err(|e| {
-                Exceptions::illegalArgumentWith(format!("couldnt parse {margin}: {e}"))
+                Exceptions::illegal_argument_with(format!("couldnt parse {margin}: {e}"))
             })?;
         }
 
diff --git a/src/oned/one_d_reader.rs b/src/oned/one_d_reader.rs
index 53880e0..7fc96dd 100644
--- a/src/oned/one_d_reader.rs
+++ b/src/oned/one_d_reader.rs
@@ -125,7 +125,7 @@ pub trait OneDReader: Reader {
             }
         }
 
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     /**
@@ -212,7 +212,7 @@ pub fn recordPattern(row: &BitArray, start: usize, counters: &mut [u32]) -> Resu
 
     let end = row.getSize();
     if start >= end {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
 
     let mut isWhite = !row.get(start);
@@ -235,7 +235,7 @@ pub fn recordPattern(row: &BitArray, start: usize, counters: &mut [u32]) -> Resu
     // If we read fully the last section of pixels and filled up our counters -- or filled
     // the last counter but ran off the side of the image, OK. Otherwise, a problem.
     if !(counterPosition == numCounters || (counterPosition == numCounters - 1 && i == end)) {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
     Ok(())
 }
@@ -253,7 +253,7 @@ pub fn recordPatternInReverse(row: &BitArray, start: usize, counters: &mut [u32]
         }
     }
     if numTransitionsLeft >= 0 {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
     recordPattern(row, start + 1, counters)?;
 
diff --git a/src/oned/rss/abstract_rss_reader.rs b/src/oned/rss/abstract_rss_reader.rs
index c172620..fe3fd1c 100644
--- a/src/oned/rss/abstract_rss_reader.rs
+++ b/src/oned/rss/abstract_rss_reader.rs
@@ -39,7 +39,7 @@ pub trait AbstractRSSReaderTrait: OneDReader {
                 return Ok(value as u32);
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     /**
diff --git a/src/oned/rss/expanded/binary_util.rs b/src/oned/rss/expanded/binary_util.rs
index e981790..dceb5fc 100644
--- a/src/oned/rss/expanded/binary_util.rs
+++ b/src/oned/rss/expanded/binary_util.rs
@@ -53,13 +53,13 @@ pub fn buildBitArrayFromString(data: &str) -> Result<BitArray> {
         // for (int i = 0; i < dotsAndXs.length(); ++i) {
         if i % 9 == 0 {
             // spaces
-            if dotsAndXs.chars().nth(i).ok_or(Exceptions::parse)? != ' ' {
-                return Err(Exceptions::illegalStateWith("space expected"));
+            if dotsAndXs.chars().nth(i).ok_or(Exceptions::PARSE)? != ' ' {
+                return Err(Exceptions::illegal_state_with("space expected"));
             }
             continue;
         }
 
-        let currentChar = dotsAndXs.chars().nth(i).ok_or(Exceptions::parse)?;
+        let currentChar = dotsAndXs.chars().nth(i).ok_or(Exceptions::PARSE)?;
         if currentChar == 'X' || currentChar == 'x' {
             binary.set(counter);
         }
@@ -81,7 +81,7 @@ pub fn buildBitArrayFromStringWithoutSpaces(data: &str) -> Result<BitArray> {
         sb.push(' ');
         let mut i = 0;
         while i < 8 && current < dotsAndXs_length {
-            sb.push(dotsAndXs.chars().nth(current).ok_or(Exceptions::parse)?);
+            sb.push(dotsAndXs.chars().nth(current).ok_or(Exceptions::PARSE)?);
             current += 1;
 
             i += 1;
diff --git a/src/oned/rss/expanded/decoders/abstract_expanded_decoder.rs b/src/oned/rss/expanded/decoders/abstract_expanded_decoder.rs
index dab10ac..1ee6258 100644
--- a/src/oned/rss/expanded/decoders/abstract_expanded_decoder.rs
+++ b/src/oned/rss/expanded/decoders/abstract_expanded_decoder.rs
@@ -152,7 +152,7 @@ pub fn createDecoder<'a>(
         _ => {}
     }
 
-    Err(Exceptions::illegalStateWith(format!(
+    Err(Exceptions::illegal_state_with(format!(
         "unknown decoder: {information}"
     )))
 }
diff --git a/src/oned/rss/expanded/decoders/ai_01392x_decoder.rs b/src/oned/rss/expanded/decoders/ai_01392x_decoder.rs
index 2b01ddd..6673bbf 100644
--- a/src/oned/rss/expanded/decoders/ai_01392x_decoder.rs
+++ b/src/oned/rss/expanded/decoders/ai_01392x_decoder.rs
@@ -39,7 +39,7 @@ impl AI01decoder for AI01392xDecoder<'_> {}
 impl AbstractExpandedDecoder for AI01392xDecoder<'_> {
     fn parseInformation(&mut self) -> Result<String> {
         if self.information.getSize() < Self::HEADER_SIZE + Self::GTIN_SIZE as usize {
-            return Err(crate::Exceptions::notFound);
+            return Err(crate::Exceptions::NOT_FOUND);
         }
 
         let mut buf = String::new();
diff --git a/src/oned/rss/expanded/decoders/ai_01393x_decoder.rs b/src/oned/rss/expanded/decoders/ai_01393x_decoder.rs
index 12d60a7..ea47e60 100644
--- a/src/oned/rss/expanded/decoders/ai_01393x_decoder.rs
+++ b/src/oned/rss/expanded/decoders/ai_01393x_decoder.rs
@@ -39,7 +39,7 @@ impl AI01decoder for AI01393xDecoder<'_> {}
 impl AbstractExpandedDecoder for AI01393xDecoder<'_> {
     fn parseInformation(&mut self) -> Result<String> {
         if self.information.getSize() < Self::HEADER_SIZE + Self::GTIN_SIZE as usize {
-            return Err(crate::Exceptions::notFound);
+            return Err(crate::Exceptions::NOT_FOUND);
         }
 
         let mut buf = String::new();
diff --git a/src/oned/rss/expanded/decoders/ai_013x0x1x_decoder.rs b/src/oned/rss/expanded/decoders/ai_013x0x1x_decoder.rs
index 5a5f95f..f18ccd3 100644
--- a/src/oned/rss/expanded/decoders/ai_013x0x1x_decoder.rs
+++ b/src/oned/rss/expanded/decoders/ai_013x0x1x_decoder.rs
@@ -57,7 +57,7 @@ impl AbstractExpandedDecoder for AI013x0x1xDecoder<'_> {
         if self.information.getSize()
             != Self::HEADER_SIZE + Self::GTIN_SIZE as usize + Self::WEIGHT_SIZE + Self::DATE_SIZE
         {
-            return Err(crate::Exceptions::notFound);
+            return Err(crate::Exceptions::NOT_FOUND);
         }
 
         let mut buf = String::new();
diff --git a/src/oned/rss/expanded/decoders/ai_013x0x_decoder.rs b/src/oned/rss/expanded/decoders/ai_013x0x_decoder.rs
index b4cd49a..9161e12 100644
--- a/src/oned/rss/expanded/decoders/ai_013x0x_decoder.rs
+++ b/src/oned/rss/expanded/decoders/ai_013x0x_decoder.rs
@@ -53,7 +53,7 @@ impl AbstractExpandedDecoder for AI013x0xDecoder<'_> {
         if self.information.getSize()
             != Self::HEADER_SIZE + Self::GTIN_SIZE as usize + Self::WEIGHT_SIZE
         {
-            return Err(crate::Exceptions::notFound);
+            return Err(crate::Exceptions::NOT_FOUND);
         }
 
         let mut buf = String::new();
diff --git a/src/oned/rss/expanded/decoders/decoded_numeric.rs b/src/oned/rss/expanded/decoders/decoded_numeric.rs
index 2ac51ba..d30dba3 100644
--- a/src/oned/rss/expanded/decoders/decoded_numeric.rs
+++ b/src/oned/rss/expanded/decoders/decoded_numeric.rs
@@ -52,7 +52,7 @@ impl DecodedNumeric {
         if
         /*firstDigit < 0 ||*/
         firstDigit > 10 || /*secondDigit < 0 ||*/ secondDigit > 10 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
 
         Ok(Self {
diff --git a/src/oned/rss/expanded/decoders/field_parser.rs b/src/oned/rss/expanded/decoders/field_parser.rs
index 5dddc14..5c64001 100644
--- a/src/oned/rss/expanded/decoders/field_parser.rs
+++ b/src/oned/rss/expanded/decoders/field_parser.rs
@@ -146,7 +146,7 @@ pub fn parseFieldsInGeneralPurpose(rawInformation: &str) -> Result<String> {
     // Processing 2-digit AIs
 
     if rawInformation.chars().count() < 2 {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
 
     let lookup: String = rawInformation.chars().take(2).collect();
@@ -159,7 +159,7 @@ pub fn parseFieldsInGeneralPurpose(rawInformation: &str) -> Result<String> {
     }
 
     if rawInformation.chars().count() < 3 {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
 
     let firstThreeDigits: String = rawInformation.chars().take(3).collect();
@@ -172,7 +172,7 @@ pub fn parseFieldsInGeneralPurpose(rawInformation: &str) -> Result<String> {
     }
 
     if rawInformation.chars().count() < 4 {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
 
     let threeDigitPlusDigitDataLength = THREE_DIGIT_PLUS_DIGIT_DATA_LENGTH.get(&firstThreeDigits);
@@ -192,18 +192,18 @@ pub fn parseFieldsInGeneralPurpose(rawInformation: &str) -> Result<String> {
         return processFixedAI(4, ffdl.length, rawInformation);
     }
 
-    Err(Exceptions::notFound)
+    Err(Exceptions::NOT_FOUND)
 }
 
 fn processFixedAI(aiSize: usize, fieldSize: usize, rawInformation: &str) -> Result<String> {
     if rawInformation.chars().count() < aiSize {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
 
     let ai: String = rawInformation.chars().take(aiSize).collect();
 
     if rawInformation.chars().count() < aiSize + fieldSize {
-        return Err(Exceptions::notFound);
+        return Err(Exceptions::NOT_FOUND);
     }
 
     let field: String = rawInformation
diff --git a/src/oned/rss/expanded/decoders/general_app_id_decoder.rs b/src/oned/rss/expanded/decoders/general_app_id_decoder.rs
index 2db7aa5..9226796 100644
--- a/src/oned/rss/expanded/decoders/general_app_id_decoder.rs
+++ b/src/oned/rss/expanded/decoders/general_app_id_decoder.rs
@@ -198,7 +198,7 @@ impl<'a> GeneralAppIdDecoder<'_> {
         if let Some(r) = result.getDecodedInformation() {
             Ok(r.clone())
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 
@@ -344,7 +344,7 @@ impl<'a> GeneralAppIdDecoder<'_> {
         if (5..15).contains(&fiveBitValue) {
             return Ok(DecodedChar::new(
                 pos + 5,
-                char::from_u32('0' as u32 + fiveBitValue - 5).ok_or(Exceptions::parse)?,
+                char::from_u32('0' as u32 + fiveBitValue - 5).ok_or(Exceptions::PARSE)?,
             ));
         }
 
@@ -353,14 +353,14 @@ impl<'a> GeneralAppIdDecoder<'_> {
         if (64..90).contains(&sevenBitValue) {
             return Ok(DecodedChar::new(
                 pos + 7,
-                char::from_u32(sevenBitValue + 1).ok_or(Exceptions::parse)?,
+                char::from_u32(sevenBitValue + 1).ok_or(Exceptions::PARSE)?,
             ));
         }
 
         if (90..116).contains(&sevenBitValue) {
             return Ok(DecodedChar::new(
                 pos + 7,
-                char::from_u32(sevenBitValue + 7).ok_or(Exceptions::parse)?,
+                char::from_u32(sevenBitValue + 7).ok_or(Exceptions::PARSE)?,
             ));
         }
 
@@ -387,7 +387,7 @@ impl<'a> GeneralAppIdDecoder<'_> {
             250 => '?',
             251 => '_',
             252 => ' ',
-            _ => return Err(Exceptions::format),
+            _ => return Err(Exceptions::FORMAT),
         };
 
         Ok(DecodedChar::new(pos + 8, c))
@@ -422,7 +422,7 @@ impl<'a> GeneralAppIdDecoder<'_> {
         if (5..15).contains(&fiveBitValue) {
             return Ok(DecodedChar::new(
                 pos + 5,
-                char::from_u32('0' as u32 + fiveBitValue - 5).ok_or(Exceptions::parse)?,
+                char::from_u32('0' as u32 + fiveBitValue - 5).ok_or(Exceptions::PARSE)?,
             ));
         }
 
@@ -431,7 +431,7 @@ impl<'a> GeneralAppIdDecoder<'_> {
         if (32..58).contains(&sixBitValue) {
             return Ok(DecodedChar::new(
                 pos + 6,
-                char::from_u32(sixBitValue + 33).ok_or(Exceptions::parse)?,
+                char::from_u32(sixBitValue + 33).ok_or(Exceptions::PARSE)?,
             ));
         }
 
@@ -442,7 +442,7 @@ impl<'a> GeneralAppIdDecoder<'_> {
             61 => '.',
             62 => '/',
             _ => {
-                return Err(Exceptions::illegalStateWith(format!(
+                return Err(Exceptions::illegal_state_with(format!(
                     "Decoding invalid alphanumeric value: {sixBitValue}"
                 )))
             }
diff --git a/src/oned/rss/expanded/rss_expanded_reader.rs b/src/oned/rss/expanded/rss_expanded_reader.rs
index e31c1f2..cb928c2 100644
--- a/src/oned/rss/expanded/rss_expanded_reader.rs
+++ b/src/oned/rss/expanded/rss_expanded_reader.rs
@@ -224,7 +224,7 @@ impl Reader for RSSExpandedReader {
 
                 Ok(result)
             } else {
-                Err(Exceptions::notFound)
+                Err(Exceptions::NOT_FOUND)
             }
         }
     }
@@ -294,7 +294,7 @@ impl RSSExpandedReader {
             if let Ok(to_add) = to_add_res {
                 self.pairs.push(to_add);
             } else if self.pairs.is_empty() {
-                return Err(to_add_res.err().unwrap_or(Exceptions::illegalState));
+                return Err(to_add_res.err().unwrap_or(Exceptions::ILLEGAL_STATE));
             } else {
                 // exit this loop when retrieveNextPair() fails and throws
                 done = true;
@@ -326,7 +326,7 @@ impl RSSExpandedReader {
             // }
         }
 
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     fn checkRows(&mut self, reverse: bool) -> Option<Vec<ExpandedPair>> {
@@ -370,7 +370,7 @@ impl RSSExpandedReader {
     ) -> Result<Vec<ExpandedPair>> {
         for i in currentRow..self.rows.len() {
             // for (int i = currentRow; i < rows.size(); i++) {
-            let row = self.rows.get(i).ok_or(Exceptions::indexOutOfBounds)?;
+            let row = self.rows.get(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
             self.pairs.clear();
             for collectedRow in &collectedRows.clone() {
                 // for (ExpandedRow collectedRow : collectedRows) {
@@ -398,7 +398,7 @@ impl RSSExpandedReader {
             }
         }
 
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     /// Whether the pairs form a valid find pattern sequence,
@@ -529,24 +529,24 @@ impl RSSExpandedReader {
     // Not private for unit testing
     pub(crate) fn constructRXingResult(pairs: &[ExpandedPair]) -> Result<RXingResult> {
         let binary = bit_array_builder::buildBitArray(&pairs.to_vec())
-            .ok_or(Exceptions::IllegalStateException(None))?;
+            .ok_or(Exceptions::ILLEGAL_STATE)?;
 
         let mut decoder = abstract_expanded_decoder::createDecoder(&binary)?;
         let resultingString = decoder.parseInformation()?;
 
         let firstPoints = pairs
             .get(0)
-            .ok_or(Exceptions::indexOutOfBounds)?
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             .getFinderPattern()
             .as_ref()
-            .ok_or(Exceptions::illegalState)?
+            .ok_or(Exceptions::ILLEGAL_STATE)?
             .getPoints();
         let lastPoints = pairs
             .last()
-            .ok_or(Exceptions::indexOutOfBounds)?
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             .getFinderPattern()
             .as_ref()
-            .ok_or(Exceptions::illegalState)?
+            .ok_or(Exceptions::ILLEGAL_STATE)?
             .getPoints();
 
         let mut result = RXingResult::new(
@@ -645,7 +645,7 @@ impl RSSExpandedReader {
 
         let leftChar = self.decodeDataCharacter(
             row,
-            pattern.as_ref().ok_or(Exceptions::notFound)?,
+            pattern.as_ref().ok_or(Exceptions::NOT_FOUND)?,
             isOddPattern,
             true,
         )?;
@@ -653,16 +653,16 @@ impl RSSExpandedReader {
         if !previousPairs.is_empty()
             && previousPairs
                 .last()
-                .ok_or(Exceptions::notFound)?
+                .ok_or(Exceptions::NOT_FOUND)?
                 .mustBeLast()
         {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let rightChar = self
             .decodeDataCharacter(
                 row,
-                pattern.as_ref().ok_or(Exceptions::notFound)?,
+                pattern.as_ref().ok_or(Exceptions::NOT_FOUND)?,
                 isOddPattern,
                 false,
             )
@@ -692,11 +692,11 @@ impl RSSExpandedReader {
         } else if previousPairs.is_empty() {
             rowOffset = 0;
         } else {
-            let lastPair = previousPairs.last().ok_or(Exceptions::indexOutOfBounds)?;
+            let lastPair = previousPairs.last().ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
             rowOffset = lastPair
                 .getFinderPattern()
                 .as_ref()
-                .ok_or(Exceptions::illegalState)?
+                .ok_or(Exceptions::ILLEGAL_STATE)?
                 .getStartEnd()[1] as i32;
         }
         let mut searchingEvenPair = previousPairs.len() % 2 != 0;
@@ -748,7 +748,7 @@ impl RSSExpandedReader {
                 isWhite = !isWhite;
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     fn reverseCounters(counters: &mut [u32]) {
@@ -845,7 +845,7 @@ impl RSSExpandedReader {
         let expectedElementWidth: f32 =
             (pattern.getStartEnd()[1] - pattern.getStartEnd()[0]) as f32 / 15.0;
         if (elementWidth - expectedElementWidth).abs() / expectedElementWidth > 0.3 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         for (i, counter) in counters.iter().enumerate() {
@@ -854,12 +854,12 @@ impl RSSExpandedReader {
             let mut count = (value + 0.5) as i32; // Round
             if count < 1 {
                 if value < 0.3 {
-                    return Err(Exceptions::notFound);
+                    return Err(Exceptions::NOT_FOUND);
                 }
                 count = 1;
             } else if count > 8 {
                 if value > 8.7 {
-                    return Err(Exceptions::notFound);
+                    return Err(Exceptions::NOT_FOUND);
                 }
                 count = 8;
             }
@@ -899,7 +899,7 @@ impl RSSExpandedReader {
         let checksumPortion = oddChecksumPortion + evenChecksumPortion;
 
         if (oddSum & 0x01) != 0 || !(4..=13).contains(&oddSum) {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let group = ((13 - oddSum) / 2) as usize;
@@ -947,12 +947,12 @@ impl RSSExpandedReader {
             1 => {
                 if oddParityBad {
                     if evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     decrementOdd = true;
                 } else {
                     if !evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     decrementEven = true;
                 }
@@ -960,12 +960,12 @@ impl RSSExpandedReader {
             -1 => {
                 if oddParityBad {
                     if evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     incrementOdd = true;
                 } else {
                     if !evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     incrementEven = true;
                 }
@@ -973,7 +973,7 @@ impl RSSExpandedReader {
             0 => {
                 if oddParityBad {
                     if !evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     // Both bad
                     if oddSum < evenSum {
@@ -984,16 +984,16 @@ impl RSSExpandedReader {
                         incrementEven = true;
                     }
                 } else if evenParityBad {
-                    return Err(Exceptions::notFound);
+                    return Err(Exceptions::NOT_FOUND);
                 }
             }
 
-            _ => return Err(Exceptions::notFound),
+            _ => return Err(Exceptions::NOT_FOUND),
         }
 
         if incrementOdd {
             if decrementOdd {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             Self::increment(&mut self.oddCounts, &self.oddRoundingErrors);
         }
@@ -1002,7 +1002,7 @@ impl RSSExpandedReader {
         }
         if incrementEven {
             if decrementEven {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             Self::increment(&mut self.evenCounts, &self.oddRoundingErrors);
         }
diff --git a/src/oned/rss/rss_14_reader.rs b/src/oned/rss/rss_14_reader.rs
index 289023e..056e69e 100644
--- a/src/oned/rss/rss_14_reader.rs
+++ b/src/oned/rss/rss_14_reader.rs
@@ -64,12 +64,12 @@ impl OneDReader for RSS14Reader {
                     if right.getCount() > 1 && self.checkChecksum(left, right) {
                         return self
                             .constructRXingResult(left, right)
-                            .ok_or(Exceptions::illegalState);
+                            .ok_or(Exceptions::ILLEGAL_STATE);
                     }
                 }
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 }
 impl Reader for RSS14Reader {
@@ -123,7 +123,7 @@ impl Reader for RSS14Reader {
 
                 Ok(result)
             } else {
-                Err(Exceptions::notFound)
+                Err(Exceptions::NOT_FOUND)
             }
         }
     }
@@ -340,7 +340,7 @@ impl RSS14Reader {
 
         if outsideChar {
             if (oddSum & 0x01) != 0 || !(4..=12).contains(&oddSum) {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             let group = ((12 - oddSum) / 2) as usize;
             let oddWidest = Self::OUTSIDE_ODD_WIDEST[group];
@@ -355,7 +355,7 @@ impl RSS14Reader {
             ))
         } else {
             if (evenSum & 0x01) != 0 || !(4..=10).contains(&evenSum) {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             let group = ((10 - evenSum) / 2) as usize;
             let oddWidest = Self::INSIDE_ODD_WIDEST[group];
@@ -414,7 +414,7 @@ impl RSS14Reader {
                 isWhite = !isWhite;
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     fn parseFoundFinderPattern(
@@ -511,12 +511,12 @@ impl RSS14Reader {
             1 => {
                 if oddParityBad {
                     if evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     decrementOdd = true;
                 } else {
                     if !evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     decrementEven = true;
                 }
@@ -524,12 +524,12 @@ impl RSS14Reader {
             -1 => {
                 if oddParityBad {
                     if evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     incrementOdd = true;
                 } else {
                     if !evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     incrementEven = true;
                 }
@@ -537,7 +537,7 @@ impl RSS14Reader {
             0 => {
                 if oddParityBad {
                     if !evenParityBad {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     }
                     // Both bad
                     if oddSum < evenSum {
@@ -548,15 +548,15 @@ impl RSS14Reader {
                         incrementEven = true;
                     }
                 } else if evenParityBad {
-                    return Err(Exceptions::notFound);
+                    return Err(Exceptions::NOT_FOUND);
                 }
             }
-            _ => return Err(Exceptions::notFound),
+            _ => return Err(Exceptions::NOT_FOUND),
         }
 
         if incrementOdd {
             if decrementOdd {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             Self::increment(&mut self.oddCounts, &self.oddRoundingErrors);
         }
@@ -565,7 +565,7 @@ impl RSS14Reader {
         }
         if incrementEven {
             if decrementEven {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             Self::increment(&mut self.evenCounts, &self.evenRoundingErrors);
         }
diff --git a/src/oned/upc_a_reader.rs b/src/oned/upc_a_reader.rs
index 2222438..db225e1 100644
--- a/src/oned/upc_a_reader.rs
+++ b/src/oned/upc_a_reader.rs
@@ -101,7 +101,7 @@ impl UPCAReader {
 
             Ok(upcaRXingResult)
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 }
diff --git a/src/oned/upc_a_writer.rs b/src/oned/upc_a_writer.rs
index f414d69..cd983b0 100644
--- a/src/oned/upc_a_writer.rs
+++ b/src/oned/upc_a_writer.rs
@@ -48,7 +48,7 @@ impl Writer for UPCAWriter {
         hints: &crate::EncodingHintDictionary,
     ) -> Result<crate::common::BitMatrix> {
         if format != &BarcodeFormat::UPC_A {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Can only encode UPC-A, but got {format:?}"
             )));
         }
diff --git a/src/oned/upc_e_reader.rs b/src/oned/upc_e_reader.rs
index 13b8c87..238321c 100644
--- a/src/oned/upc_e_reader.rs
+++ b/src/oned/upc_e_reader.rs
@@ -50,7 +50,7 @@ impl UPCEANReader for UPCEReader {
         while x < 6 && rowOffset < end {
             let bestMatch = self.decodeDigit(row, &mut counters, rowOffset, &L_AND_G_PATTERNS)?;
             resultString
-                .push(char::from_u32('0' as u32 + bestMatch as u32 % 10).ok_or(Exceptions::parse)?);
+                .push(char::from_u32('0' as u32 + bestMatch as u32 % 10).ok_or(Exceptions::PARSE)?);
             rowOffset += counters.iter().sum::<u32>() as usize;
 
             if bestMatch >= 10 {
@@ -67,7 +67,7 @@ impl UPCEANReader for UPCEReader {
 
     fn checkChecksum(&self, s: &str) -> Result<bool> {
         self.checkStandardUPCEANChecksum(
-            &convertUPCEtoUPCA(s).ok_or(Exceptions::IllegalArgumentException(None))?,
+            &convertUPCEtoUPCA(s).ok_or(Exceptions::ILLEGAL_ARGUMENT)?,
         )
     }
 
@@ -126,15 +126,15 @@ impl UPCEReader {
                 if lgPatternFound == Self::NUMSYS_AND_CHECK_DIGIT_PATTERNS[numSys][d] {
                     resultString.insert(
                         0,
-                        char::from_u32('0' as u32 + numSys as u32).ok_or(Exceptions::parse)?,
+                        char::from_u32('0' as u32 + numSys as u32).ok_or(Exceptions::PARSE)?,
                     );
                     resultString
-                        .push(char::from_u32('0' as u32 + d as u32).ok_or(Exceptions::parse)?);
+                        .push(char::from_u32('0' as u32 + d as u32).ok_or(Exceptions::PARSE)?);
                     return Ok(());
                 }
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 }
 
diff --git a/src/oned/upc_e_writer.rs b/src/oned/upc_e_writer.rs
index cfad829..593e154 100644
--- a/src/oned/upc_e_writer.rs
+++ b/src/oned/upc_e_writer.rs
@@ -47,22 +47,22 @@ impl OneDimensionalCodeWriter for UPCEWriter {
                 // No check digit present, calculate it and add it
                 let check = reader.getStandardUPCEANChecksum(
                     &upc_e_reader::convertUPCEtoUPCA(&contents)
-                        .ok_or(Exceptions::illegalArgument)?,
+                        .ok_or(Exceptions::ILLEGAL_ARGUMENT)?,
                 )?;
                 contents.push_str(&check.to_string());
             }
             8 => {
                 if !reader.checkStandardUPCEANChecksum(
                     &upc_e_reader::convertUPCEtoUPCA(&contents)
-                        .ok_or(Exceptions::illegalArgument)?,
+                        .ok_or(Exceptions::ILLEGAL_ARGUMENT)?,
                 )? {
-                    return Err(Exceptions::illegalArgumentWith(
+                    return Err(Exceptions::illegal_argument_with(
                         "Contents do not pass checksum",
                     ));
                 }
             }
             _ => {
-                return Err(Exceptions::illegalArgumentWith(format!(
+                return Err(Exceptions::illegal_argument_with(format!(
                     "Requested contents should be 7 or 8 digits long, but got {length}"
                 )))
             }
@@ -73,11 +73,11 @@ impl OneDimensionalCodeWriter for UPCEWriter {
         let firstDigit = contents
             .chars()
             .next()
-            .ok_or(Exceptions::indexOutOfBounds)?
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             .to_digit(10)
-            .ok_or(Exceptions::parse)? as usize; //Character.digit(contents.charAt(0), 10);
+            .ok_or(Exceptions::PARSE)? as usize; //Character.digit(contents.charAt(0), 10);
         if firstDigit != 0 && firstDigit != 1 {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Number system must be 0 or 1",
             ));
         }
@@ -85,9 +85,9 @@ impl OneDimensionalCodeWriter for UPCEWriter {
         let checkDigit = contents
             .chars()
             .nth(7)
-            .ok_or(Exceptions::indexOutOfBounds)?
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
             .to_digit(10)
-            .ok_or(Exceptions::parse)? as usize; //Character.digit(contents.charAt(7), 10);
+            .ok_or(Exceptions::PARSE)? as usize; //Character.digit(contents.charAt(7), 10);
         let parities = UPCEReader::NUMSYS_AND_CHECK_DIGIT_PATTERNS[firstDigit][checkDigit];
         let mut result = [false; CODE_WIDTH];
 
@@ -99,9 +99,9 @@ impl OneDimensionalCodeWriter for UPCEWriter {
             let mut digit = contents
                 .chars()
                 .nth(i)
-                .ok_or(Exceptions::indexOutOfBounds)?
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                 .to_digit(10)
-                .ok_or(Exceptions::parse)? as usize; //Character.digit(contents.charAt(i), 10);
+                .ok_or(Exceptions::PARSE)? as usize; //Character.digit(contents.charAt(i), 10);
             if (parities >> (6 - i) & 1) == 1 {
                 digit += 10;
             }
diff --git a/src/oned/upc_ean_extension_2_support.rs b/src/oned/upc_ean_extension_2_support.rs
index 13f7ce6..4bf5e8a 100644
--- a/src/oned/upc_ean_extension_2_support.rs
+++ b/src/oned/upc_ean_extension_2_support.rs
@@ -88,7 +88,7 @@ impl UPCEANExtension2Support {
                 &upc_ean_reader::L_AND_G_PATTERNS,
             )?;
             resultString
-                .push(char::from_u32('0' as u32 + bestMatch as u32 % 10).ok_or(Exceptions::parse)?);
+                .push(char::from_u32('0' as u32 + bestMatch as u32 % 10).ok_or(Exceptions::PARSE)?);
 
             rowOffset += counters.iter().sum::<u32>() as usize;
 
@@ -104,16 +104,16 @@ impl UPCEANExtension2Support {
         }
 
         if resultString.chars().count() != 2 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         if resultString
             .parse::<u32>()
-            .map_err(|e| Exceptions::parseWith(format!("could not parse {resultString}: {e}")))?
+            .map_err(|e| Exceptions::parse_with(format!("could not parse {resultString}: {e}")))?
             % 4
             != checkParity
         {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         Ok(rowOffset as u32)
diff --git a/src/oned/upc_ean_extension_5_support.rs b/src/oned/upc_ean_extension_5_support.rs
index 7748af1..ca8d51b 100644
--- a/src/oned/upc_ean_extension_5_support.rs
+++ b/src/oned/upc_ean_extension_5_support.rs
@@ -87,7 +87,7 @@ impl UPCEANExtension5Support {
                 &upc_ean_reader::L_AND_G_PATTERNS,
             )?;
             resultString
-                .push(char::from_u32('0' as u32 + bestMatch as u32 % 10).ok_or(Exceptions::parse)?);
+                .push(char::from_u32('0' as u32 + bestMatch as u32 % 10).ok_or(Exceptions::PARSE)?);
 
             rowOffset += counters.iter().sum::<u32>() as usize;
 
@@ -104,14 +104,14 @@ impl UPCEANExtension5Support {
         }
 
         if resultString.chars().count() != 5 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let checkDigit = Self::determineCheckDigit(lgPatternFound)?;
-        if Self::extensionChecksum(resultString).ok_or(Exceptions::illegalArgument)?
+        if Self::extensionChecksum(resultString).ok_or(Exceptions::ILLEGAL_ARGUMENT)?
             != checkDigit as u32
         {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         Ok(rowOffset as u32)
@@ -146,7 +146,7 @@ impl UPCEANExtension5Support {
                 return Ok(d);
             }
         }
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     /**
diff --git a/src/oned/upc_ean_reader.rs b/src/oned/upc_ean_reader.rs
index 021f61e..9f5a762 100644
--- a/src/oned/upc_ean_reader.rs
+++ b/src/oned/upc_ean_reader.rs
@@ -183,18 +183,18 @@ pub trait UPCEANReader: OneDReader {
         let end = endRange[1];
         let quietEnd = end + (end - endRange[0]);
         if quietEnd >= row.getSize() || !row.isRange(end, quietEnd, false)? {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let resultString = result;
 
         // UPC/EAN should never be less than 8 chars anyway
         if resultString.chars().count() < 8 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
 
         if !self.checkChecksum(&resultString)? {
-            return Err(Exceptions::checksum);
+            return Err(Exceptions::CHECKSUM);
         }
 
         let left = (startGuardRange[1] + startGuardRange[0]) as f32 / 2.0;
@@ -241,7 +241,7 @@ pub trait UPCEANReader: OneDReader {
                 }
             }
             if !valid {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
         }
 
@@ -292,7 +292,7 @@ pub trait UPCEANReader: OneDReader {
         let char_in_question = s
             .chars()
             .nth(length - 1)
-            .ok_or(Exceptions::indexOutOfBounds)?;
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
         let check = char_in_question.is_ascii_digit();
 
         let check_against = &s[..length - 1]; //s.subSequence(0, length - 1);
@@ -300,7 +300,7 @@ pub trait UPCEANReader: OneDReader {
 
         Ok(calculated_checksum
             == if check {
-                char_in_question.to_digit(10).ok_or(Exceptions::parse)?
+                char_in_question.to_digit(10).ok_or(Exceptions::PARSE)?
             } else {
                 u32::MAX
             })
@@ -315,10 +315,10 @@ pub trait UPCEANReader: OneDReader {
             let digit = (s
                 .chars()
                 .nth(i as usize)
-                .ok_or(Exceptions::indexOutOfBounds)? as i32)
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as i32)
                 - ('0' as i32);
             if !(0..=9).contains(&digit) {
-                return Err(Exceptions::format);
+                return Err(Exceptions::FORMAT);
             }
             sum += digit;
 
@@ -331,10 +331,10 @@ pub trait UPCEANReader: OneDReader {
             let digit = (s
                 .chars()
                 .nth(i as usize)
-                .ok_or(Exceptions::indexOutOfBounds)? as i32)
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as i32)
                 - ('0' as i32);
             if !(0..=9).contains(&digit) {
-                return Err(Exceptions::format);
+                return Err(Exceptions::FORMAT);
             }
             sum += digit;
 
@@ -421,7 +421,7 @@ pub trait UPCEANReader: OneDReader {
             }
         }
 
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     /**
@@ -458,7 +458,7 @@ pub trait UPCEANReader: OneDReader {
         if bestMatch >= 0 {
             Ok(bestMatch as usize)
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 
diff --git a/src/pdf417/decoder/bounding_box.rs b/src/pdf417/decoder/bounding_box.rs
index c42f713..2ce0057 100644
--- a/src/pdf417/decoder/bounding_box.rs
+++ b/src/pdf417/decoder/bounding_box.rs
@@ -47,7 +47,7 @@ impl BoundingBox {
         let leftUnspecified = topLeft.is_none() || bottomLeft.is_none();
         let rightUnspecified = topRight.is_none() || bottomRight.is_none();
         if leftUnspecified && rightUnspecified {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let newTopLeft;
@@ -56,20 +56,20 @@ impl BoundingBox {
         let newBottomRight;
 
         if leftUnspecified {
-            newTopRight = topRight.ok_or(Exceptions::illegalState)?;
-            newBottomRight = bottomRight.ok_or(Exceptions::illegalState)?;
+            newTopRight = topRight.ok_or(Exceptions::ILLEGAL_STATE)?;
+            newBottomRight = bottomRight.ok_or(Exceptions::ILLEGAL_STATE)?;
             newTopLeft = point(0.0, newTopRight.y);
             newBottomLeft = point(0.0, newBottomRight.y);
         } else if rightUnspecified {
-            newTopLeft = topLeft.ok_or(Exceptions::illegalState)?;
-            newBottomLeft = bottomLeft.ok_or(Exceptions::illegalState)?;
+            newTopLeft = topLeft.ok_or(Exceptions::ILLEGAL_STATE)?;
+            newBottomLeft = bottomLeft.ok_or(Exceptions::ILLEGAL_STATE)?;
             newTopRight = point(image.getWidth() as f32 - 1.0, newTopLeft.y);
             newBottomRight = point(image.getWidth() as f32 - 1.0, newBottomLeft.y);
         } else {
-            newTopLeft = topLeft.ok_or(Exceptions::illegalState)?;
-            newTopRight = topRight.ok_or(Exceptions::illegalState)?;
-            newBottomLeft = bottomLeft.ok_or(Exceptions::illegalState)?;
-            newBottomRight = bottomRight.ok_or(Exceptions::illegalState)?;
+            newTopLeft = topLeft.ok_or(Exceptions::ILLEGAL_STATE)?;
+            newTopRight = topRight.ok_or(Exceptions::ILLEGAL_STATE)?;
+            newBottomLeft = bottomLeft.ok_or(Exceptions::ILLEGAL_STATE)?;
+            newBottomRight = bottomRight.ok_or(Exceptions::ILLEGAL_STATE)?;
         }
 
         Ok(BoundingBox {
@@ -104,13 +104,13 @@ impl BoundingBox {
         rightBox: Option<BoundingBox>,
     ) -> Result<BoundingBox> {
         if leftBox.is_none() {
-            return Ok(rightBox.as_ref().ok_or(Exceptions::illegalState)?.clone());
+            return Ok(rightBox.as_ref().ok_or(Exceptions::ILLEGAL_STATE)?.clone());
         }
         if rightBox.is_none() {
-            return Ok(leftBox.as_ref().ok_or(Exceptions::illegalState)?.clone());
+            return Ok(leftBox.as_ref().ok_or(Exceptions::ILLEGAL_STATE)?.clone());
         }
-        let leftBox = leftBox.ok_or(Exceptions::illegalState)?;
-        let rightBox = rightBox.ok_or(Exceptions::illegalState)?;
+        let leftBox = leftBox.ok_or(Exceptions::ILLEGAL_STATE)?;
+        let rightBox = rightBox.ok_or(Exceptions::ILLEGAL_STATE)?;
 
         BoundingBox::new(
             leftBox.image,
diff --git a/src/pdf417/decoder/decoded_bit_stream_parser.rs b/src/pdf417/decoder/decoded_bit_stream_parser.rs
index 956bd83..75d35ad 100644
--- a/src/pdf417/decoder/decoded_bit_stream_parser.rs
+++ b/src/pdf417/decoder/decoded_bit_stream_parser.rs
@@ -121,7 +121,7 @@ pub fn decode(codewords: &[u32], ecLevel: &str) -> Result<DecoderRXingResult> {
                 codeIndex = byteCompaction(code, codewords, codeIndex, &mut result)?
             }
             MODE_SHIFT_TO_BYTE_COMPACTION_MODE => {
-                result.append_char(char::from_u32(codewords[codeIndex]).ok_or(Exceptions::parse)?);
+                result.append_char(char::from_u32(codewords[codeIndex]).ok_or(Exceptions::PARSE)?);
                 codeIndex += 1;
             }
             NUMERIC_COMPACTION_MODE_LATCH => {
@@ -147,7 +147,7 @@ pub fn decode(codewords: &[u32], ecLevel: &str) -> Result<DecoderRXingResult> {
             BEGIN_MACRO_PDF417_OPTIONAL_FIELD | MACRO_PDF417_TERMINATOR =>
             // Should not see these outside a macro block
             {
-                return Err(Exceptions::format)
+                return Err(Exceptions::FORMAT)
             }
             _ => {
                 // Default to text compaction. During testing numerous barcodes
@@ -162,7 +162,7 @@ pub fn decode(codewords: &[u32], ecLevel: &str) -> Result<DecoderRXingResult> {
     result = result.build_result();
 
     if result.is_empty() && resultMetadata.getFileId().is_empty() {
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
 
     let mut decoderRXingResult = DecoderRXingResult::new(
@@ -184,7 +184,7 @@ pub fn decodeMacroBlock(
     let mut codeIndex = codeIndex;
     if codeIndex + NUMBER_OF_SEQUENCE_CODEWORDS > codewords[0] as usize {
         // we must have at least two bytes left for the segment index
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
     let mut segmentIndexArray = [0; NUMBER_OF_SEQUENCE_CODEWORDS];
     for seq in segmentIndexArray
@@ -202,7 +202,7 @@ pub fn decodeMacroBlock(
         resultMetadata.setSegmentIndex(parsed_int);
     } else {
         // too large; bad input?
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
 
     // Decoding the fileId codewords as 0-899 numbers, each 0-filled to width 3. This follows the spec
@@ -219,7 +219,7 @@ pub fn decodeMacroBlock(
     }
     if fileId.chars().count() == 0 {
         // at least one fileId codeword is required (Annex H.2)
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
     resultMetadata.setFileId(fileId);
 
@@ -256,7 +256,7 @@ pub fn decodeMacroBlock(
                         codeIndex = numericCompaction(codewords, codeIndex + 1, &mut segmentCount)?;
                         segmentCount = segmentCount.build_result();
                         let Ok(parsed_segment_count) = segmentCount.to_string().parse() else {
-                            return Err(Exceptions::format);
+                            return Err(Exceptions::FORMAT);
                         };
                         resultMetadata.setSegmentCount(parsed_segment_count);
                     }
@@ -265,7 +265,7 @@ pub fn decodeMacroBlock(
                         codeIndex = numericCompaction(codewords, codeIndex + 1, &mut timestamp)?;
                         timestamp = timestamp.build_result();
                         let Ok(parsed_timestamp) = timestamp.to_string().parse() else {
-                            return Err(Exceptions::format);
+                            return Err(Exceptions::FORMAT);
                         };
                         resultMetadata.setTimestamp(parsed_timestamp);
                     }
@@ -274,7 +274,7 @@ pub fn decodeMacroBlock(
                         codeIndex = numericCompaction(codewords, codeIndex + 1, &mut checksum)?;
                         checksum = checksum.build_result();
                         let Ok(parsed_checksum ) = checksum.to_string().parse() else {
-                            return Err(Exceptions::format);
+                            return Err(Exceptions::FORMAT);
                         };
                         resultMetadata.setChecksum(parsed_checksum);
                     }
@@ -283,18 +283,18 @@ pub fn decodeMacroBlock(
                         codeIndex = numericCompaction(codewords, codeIndex + 1, &mut fileSize)?;
                         fileSize = fileSize.build_result();
                         let Ok(parsed_file_size)= fileSize.to_string().parse() else {
-                            return Err(Exceptions::format);
+                            return Err(Exceptions::FORMAT);
                         };
                         resultMetadata.setFileSize(parsed_file_size);
                     }
-                    _ => return Err(Exceptions::format),
+                    _ => return Err(Exceptions::FORMAT),
                 }
             }
             MACRO_PDF417_TERMINATOR => {
                 codeIndex += 1;
                 resultMetadata.setLastSegment(true);
             }
-            _ => return Err(Exceptions::format),
+            _ => return Err(Exceptions::FORMAT),
         }
     }
 
@@ -386,7 +386,7 @@ fn textCompaction(
                     result,
                     subMode,
                 )
-                .ok_or(Exceptions::illegalState)?;
+                .ok_or(Exceptions::ILLEGAL_STATE)?;
                 result.appendECI(codewords[codeIndex])?;
                 codeIndex += 1;
                 textCompactionData = vec![0; (codewords[0] as usize - codeIndex) * 2];
@@ -770,14 +770,14 @@ fn numericCompaction(
 fn decodeBase900toBase10(codewords: &[u32], count: usize) -> Result<String> {
     let mut result = 0
         .to_biguint()
-        .ok_or(Exceptions::ArithmeticException(None))?;
+        .ok_or(Exceptions::ARITHMETIC)?;
     for i in 0..count {
         result +=
-            &EXP900[count - i - 1] * (codewords[i].to_biguint().ok_or(Exceptions::arithmetic)?);
+            &EXP900[count - i - 1] * (codewords[i].to_biguint().ok_or(Exceptions::ARITHMETIC)?);
     }
     let resultString = result.to_string();
     if !resultString.starts_with('1') {
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
     Ok(resultString[1..].to_owned())
 }
diff --git a/src/pdf417/decoder/ec/error_correction.rs b/src/pdf417/decoder/ec/error_correction.rs
index 47759ac..7c57333 100644
--- a/src/pdf417/decoder/ec/error_correction.rs
+++ b/src/pdf417/decoder/ec/error_correction.rs
@@ -100,7 +100,7 @@ pub fn decode(received: &mut [u32], numECCodewords: u32, erasures: &mut [u32]) -
         // for (int i = 0; i < errorLocations.length; i++) {
         let position = received.len() as isize - 1 - field.log(errorLocations[i])? as isize;
         if position < 0 {
-            return Err(Exceptions::checksumWith(file!()));
+            return Err(Exceptions::checksum_with(file!()));
         }
         received[position as usize] =
             field.subtract(received[position as usize], errorMagnitudes[i]);
@@ -137,7 +137,7 @@ fn runEuclideanAlgorithm(
         // Divide rLastLast by rLast, with quotient in q and remainder in r
         if rLast.isZero() {
             // Oops, Euclidean algorithm already terminated?
-            return Err(Exceptions::checksumWith(file!()));
+            return Err(Exceptions::checksum_with(file!()));
         }
         r = rLastLast;
         let mut q = ModulusPoly::getZero(field); //field.getZero();
@@ -159,7 +159,7 @@ fn runEuclideanAlgorithm(
 
     let sigmaTildeAtZero = t.getCoefficient(0);
     if sigmaTildeAtZero == 0 {
-        return Err(Exceptions::checksumWith(file!()));
+        return Err(Exceptions::checksum_with(file!()));
     }
 
     let inverse = field.inverse(sigmaTildeAtZero)?;
@@ -184,7 +184,7 @@ fn findErrorLocations(errorLocator: Rc<ModulusPoly>, field: &ModulusGF) -> Resul
         i += 1;
     }
     if e != numErrors {
-        return Err(Exceptions::checksumWith(file!()));
+        return Err(Exceptions::checksum_with(file!()));
     }
     Ok(result)
 }
diff --git a/src/pdf417/decoder/ec/modulus_gf.rs b/src/pdf417/decoder/ec/modulus_gf.rs
index ae97f3f..dd811ff 100644
--- a/src/pdf417/decoder/ec/modulus_gf.rs
+++ b/src/pdf417/decoder/ec/modulus_gf.rs
@@ -78,7 +78,7 @@ impl ModulusGF {
 
     pub fn log(&self, a: u32) -> Result<u32> {
         if a == 0 {
-            Err(Exceptions::arithmetic)
+            Err(Exceptions::ARITHMETIC)
         } else {
             Ok(self.logTable[a as usize])
         }
@@ -86,7 +86,7 @@ impl ModulusGF {
 
     pub fn inverse(&self, a: u32) -> Result<u32> {
         if a == 0 {
-            Err(Exceptions::arithmetic)
+            Err(Exceptions::ARITHMETIC)
         } else {
             Ok(self.expTable[self.modulus as usize - self.logTable[a as usize] as usize - 1])
         }
diff --git a/src/pdf417/decoder/ec/modulus_poly.rs b/src/pdf417/decoder/ec/modulus_poly.rs
index 34957c0..0ee9457 100644
--- a/src/pdf417/decoder/ec/modulus_poly.rs
+++ b/src/pdf417/decoder/ec/modulus_poly.rs
@@ -34,7 +34,7 @@ pub struct ModulusPoly {
 impl ModulusPoly {
     pub fn new(field: &'static ModulusGF, coefficients: Vec<u32>) -> Result<ModulusPoly> {
         if coefficients.is_empty() {
-            return Err(Exceptions::illegalArgument);
+            return Err(Exceptions::ILLEGAL_ARGUMENT);
         }
         let orig_coefs = coefficients.clone();
         let mut coefficients = coefficients;
@@ -124,7 +124,7 @@ impl ModulusPoly {
 
     pub fn add(&self, other: Rc<ModulusPoly>) -> Result<Rc<ModulusPoly>> {
         if self.field != other.field {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "ModulusPolys do not have same ModulusGF field",
             ));
         }
@@ -158,7 +158,7 @@ impl ModulusPoly {
 
     pub fn subtract(&self, other: Rc<ModulusPoly>) -> Result<Rc<ModulusPoly>> {
         if self.field != other.field {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "ModulusPolys do not have same ModulusGF field",
             ));
         }
@@ -170,7 +170,7 @@ impl ModulusPoly {
 
     pub fn multiply(&self, other: Rc<ModulusPoly>) -> Result<Rc<ModulusPoly>> {
         if !(self.field == other.field) {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "ModulusPolys do not have same ModulusGF field",
             ));
         }
diff --git a/src/pdf417/decoder/pdf_417_scanning_decoder.rs b/src/pdf417/decoder/pdf_417_scanning_decoder.rs
index 6977d8f..c526062 100644
--- a/src/pdf417/decoder/pdf_417_scanning_decoder.rs
+++ b/src/pdf417/decoder/pdf_417_scanning_decoder.rs
@@ -86,7 +86,7 @@ pub fn decode(
         }
         detectionRXingResult = merge(&mut leftRowIndicatorColumn, &mut rightRowIndicatorColumn)?;
         if detectionRXingResult.is_none() {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         // detectionRXingResult = detectionRXingResult;
 
@@ -142,7 +142,7 @@ pub fn decode(
             // for (int imageRow = boundingBox.getMinY(); imageRow <= boundingBox.getMaxY(); imageRow++) {
             startColumn =
                 getStartColumn(&detectionRXingResult, barcodeColumn, imageRow, leftToRight)
-                    .ok_or(Exceptions::illegalState)? as i32;
+                    .ok_or(Exceptions::ILLEGAL_STATE)? as i32;
             if startColumn < 0 || startColumn > boundingBox.getMaxX() as i32 {
                 if previousStartColumn == -1 {
                     continue;
@@ -412,7 +412,7 @@ fn adjustCodewordCount(
         as u32;
     if numberOfCodewords.is_empty() {
         if !(1..=pdf_417_common::MAX_CODEWORDS_IN_BARCODE).contains(&calculatedNumberOfCodewords) {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         barcodeMatrix01.setValue(calculatedNumberOfCodewords);
     } else if numberOfCodewords[0] != calculatedNumberOfCodewords
@@ -508,7 +508,7 @@ fn createDecoderRXingResultFromAmbiguousValues(
         //   //
         // }
         if ambiguousIndexCount.is_empty() {
-            return Err(Exceptions::checksum);
+            return Err(Exceptions::CHECKSUM);
         }
         for i in 0..ambiguousIndexCount.len() {
             // for (int i = 0; i < ambiguousIndexCount.length; i++) {
@@ -518,14 +518,14 @@ fn createDecoderRXingResultFromAmbiguousValues(
             } else {
                 ambiguousIndexCount[i] = 0;
                 if i == ambiguousIndexCount.len() - 1 {
-                    return Err(Exceptions::checksum);
+                    return Err(Exceptions::CHECKSUM);
                 }
             }
         }
 
         tries -= 1;
     }
-    Err(Exceptions::checksum)
+    Err(Exceptions::CHECKSUM)
 }
 
 fn createBarcodeMatrix(detectionRXingResult: &mut DetectionRXingResult) -> Vec<Vec<BarcodeValue>> {
@@ -845,7 +845,7 @@ fn decodeCodewords(
     erasures: &mut [u32],
 ) -> Result<DecoderRXingResult> {
     if codewords.is_empty() {
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
 
     let numECCodewords = 1 << (ecLevel + 1);
@@ -880,7 +880,7 @@ fn correctErrors(
         || numECCodewords > MAX_EC_CODEWORDS
     {
         // Too many errors or EC Codewords is corrupted
-        return Err(Exceptions::checksum);
+        return Err(Exceptions::CHECKSUM);
     }
     ec::error_correction::decode(codewords, numECCodewords, erasures)
 }
@@ -892,21 +892,21 @@ fn verifyCodewordCount(codewords: &mut [u32], numECCodewords: u32) -> Result<()>
     if codewords.len() < 4 {
         // Codeword array size should be at least 4 allowing for
         // Count CW, At least one Data CW, Error Correction CW, Error Correction CW
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
     // The first codeword, the Symbol Length Descriptor, shall always encode the total number of data
     // codewords in the symbol, including the Symbol Length Descriptor itself, data codewords and pad
     // codewords, but excluding the number of error correction codewords.
     let numberOfCodewords = codewords[0];
     if numberOfCodewords > codewords.len() as u32 {
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
     if numberOfCodewords == 0 {
         // Reset to the length of the array - 8 (Allow for at least level 3 Error Correction (8 Error Codewords)
         if numECCodewords < codewords.len() as u32 {
             codewords[0] = codewords.len() as u32 - numECCodewords;
         } else {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
     }
     Ok(())
diff --git a/src/pdf417/detector/pdf_417_detector.rs b/src/pdf417/detector/pdf_417_detector.rs
index 1bf1935..5ae0289 100644
--- a/src/pdf417/detector/pdf_417_detector.rs
+++ b/src/pdf417/detector/pdf_417_detector.rs
@@ -78,7 +78,7 @@ pub fn detect_with_hints(
     for rotation in ROTATIONS {
         // for (int rotation : ROTATIONS) {
         let bitMatrix = applyRotation(originalMatrix, rotation)?;
-        let barcodeCoordinates = detect(multiple, &bitMatrix).ok_or(Exceptions::notFound)?;
+        let barcodeCoordinates = detect(multiple, &bitMatrix).ok_or(Exceptions::NOT_FOUND)?;
         if !barcodeCoordinates.is_empty() {
             return Ok(PDF417DetectorRXingResult::with_rotation(
                 bitMatrix.into_owned(),
diff --git a/src/pdf417/encoder/compaction.rs b/src/pdf417/encoder/compaction.rs
index 8de3364..ccd9d1c 100644
--- a/src/pdf417/encoder/compaction.rs
+++ b/src/pdf417/encoder/compaction.rs
@@ -40,7 +40,7 @@ impl TryFrom<&String> for Compaction {
                 _ => {}
             }
         }
-        Err(Exceptions::formatWith(format!(
+        Err(Exceptions::format_with(format!(
             "Compaction must be 0-3 (inclusivie). Found: {value}"
         )))
     }
diff --git a/src/pdf417/encoder/pdf_417.rs b/src/pdf417/encoder/pdf_417.rs
index 2ee5dca..46b7a90 100644
--- a/src/pdf417/encoder/pdf_417.rs
+++ b/src/pdf417/encoder/pdf_417.rs
@@ -162,7 +162,7 @@ impl PDF417 {
                 pattern = CODEWORD_TABLE[cluster][fullCodewords
                     .chars()
                     .nth(idx)
-                    .ok_or(Exceptions::indexOutOfBounds)?
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                     as usize];
                 Self::encodeChar(pattern, 17, logic.getCurrentRowMut());
                 idx += 1;
@@ -223,17 +223,17 @@ impl PDF417 {
         //2. step: construct data codewords
         if sourceCodeWords + errorCorrectionCodeWords + 1 > 929 {
             // +1 for symbol length CW
-            return Err(Exceptions::writerWith(format!(
+            return Err(Exceptions::writer_with(format!(
                 "Encoded message contains too many code words, message too big ({} bytes)",
                 msg.chars().count()
             )));
         }
         let n = sourceCodeWords + pad + 1;
         let mut sb = String::with_capacity(n as usize);
-        sb.push(char::from_u32(n).ok_or(Exceptions::parse)?);
+        sb.push(char::from_u32(n).ok_or(Exceptions::PARSE)?);
         sb.push_str(&highLevel);
         for _i in 0..pad {
-            sb.push(char::from_u32(900).ok_or(Exceptions::parse)?);
+            sb.push(char::from_u32(900).ok_or(Exceptions::PARSE)?);
             //PAD characters
         }
         let dataCodewords = sb;
@@ -312,7 +312,7 @@ impl PDF417 {
             }
         }
 
-        dimension.ok_or(Exceptions::writerWith("Unable to fit message in columns"))
+        dimension.ok_or(Exceptions::writer_with("Unable to fit message in columns"))
     }
 
     /**
diff --git a/src/pdf417/encoder/pdf_417_error_correction.rs b/src/pdf417/encoder/pdf_417_error_correction.rs
index d3328d5..2888a26 100644
--- a/src/pdf417/encoder/pdf_417_error_correction.rs
+++ b/src/pdf417/encoder/pdf_417_error_correction.rs
@@ -120,7 +120,7 @@ static EC_COEFFICIENTS: Lazy<[Vec<u32>; 9]> = Lazy::new(|| {
  */
 pub fn getErrorCorrectionCodewordCount(errorCorrectionLevel: u32) -> Result<u32> {
     if errorCorrectionLevel > 8 {
-        return Err(Exceptions::illegalArgumentWith(
+        return Err(Exceptions::illegal_argument_with(
             "Error correction level must be between 0 and 8!",
         ));
     }
@@ -136,7 +136,7 @@ pub fn getErrorCorrectionCodewordCount(errorCorrectionLevel: u32) -> Result<u32>
  */
 pub fn getRecommendedMinimumErrorCorrectionLevel(n: u32) -> Result<u32> {
     if n == 0 {
-        Err(Exceptions::illegalArgumentWith("n must be > 0"))
+        Err(Exceptions::illegal_argument_with("n must be > 0"))
     } else if n <= 40 {
         Ok(2)
     } else if n <= 160 {
@@ -146,7 +146,7 @@ pub fn getRecommendedMinimumErrorCorrectionLevel(n: u32) -> Result<u32> {
     } else if n <= 863 {
         Ok(5)
     } else {
-        Err(Exceptions::writerWith("No recommendation possible"))
+        Err(Exceptions::writer_with("No recommendation possible"))
     }
 }
 
@@ -165,7 +165,7 @@ pub fn generateErrorCorrection(dataCodewords: &str, errorCorrectionLevel: u32) -
         let t1 = (dataCodewords
             .chars()
             .nth(i)
-            .ok_or(Exceptions::indexOutOfBounds)? as u32
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u32
             + e[e.len() - 1] as u32)
             % 929;
         let mut t2;
@@ -174,18 +174,18 @@ pub fn generateErrorCorrection(dataCodewords: &str, errorCorrectionLevel: u32) -
         while j >= 1 {
             t2 = (t1 * EC_COEFFICIENTS[errorCorrectionLevel as usize][j]) % 929;
             t3 = 929 - t2;
-            e[j] = char::from_u32((e[j - 1] as u32 + t3) % 929).ok_or(Exceptions::parse)?;
+            e[j] = char::from_u32((e[j - 1] as u32 + t3) % 929).ok_or(Exceptions::PARSE)?;
             j -= 1;
         }
         t2 = (t1 * EC_COEFFICIENTS[errorCorrectionLevel as usize][0]) % 929;
         t3 = 929 - t2;
-        e[0] = char::from_u32(t3 % 929).ok_or(Exceptions::parse)?;
+        e[0] = char::from_u32(t3 % 929).ok_or(Exceptions::PARSE)?;
     }
     let mut sb = String::with_capacity(k as usize);
     let mut j = k as isize - 1;
     while j >= 0 {
         if e[j as usize] as u32 != 0 {
-            e[j as usize] = char::from_u32(929 - e[j as usize] as u32).ok_or(Exceptions::parse)?;
+            e[j as usize] = char::from_u32(929 - e[j as usize] as u32).ok_or(Exceptions::PARSE)?;
         }
         sb.push(e[j as usize]);
 
diff --git a/src/pdf417/encoder/pdf_417_high_level_encoder.rs b/src/pdf417/encoder/pdf_417_high_level_encoder.rs
index 17f949f..b35144f 100644
--- a/src/pdf417/encoder/pdf_417_high_level_encoder.rs
+++ b/src/pdf417/encoder/pdf_417_high_level_encoder.rs
@@ -179,13 +179,13 @@ pub fn encodeHighLevel(
 ) -> Result<String> {
     let mut encoding = encoding;
     if msg.is_empty() {
-        return Err(Exceptions::writerWith("Empty message not allowed"));
+        return Err(Exceptions::writer_with("Empty message not allowed"));
     }
 
     if encoding.is_none() && !autoECI {
         for ch in msg.chars() {
             if ch as u32 > 255 {
-                return Err(Exceptions::writerWith(format!("Non-encodable character detected: {} (Unicode: {}). Consider specifying EncodeHintType.PDF417_AUTO_ECI and/or EncodeTypeHint.CHARACTER_SET.",ch as u32,ch)));
+                return Err(Exceptions::writer_with(format!("Non-encodable character detected: {} (Unicode: {}). Consider specifying EncodeHintType.PDF417_AUTO_ECI and/or EncodeTypeHint.CHARACTER_SET.", ch as u32, ch)));
             }
         }
     }
@@ -200,10 +200,10 @@ pub fn encodeHighLevel(
         if encoding.is_none() {
             encoding = Some(DEFAULT_ENCODING);
         } else if DEFAULT_ENCODING.name()
-            != encoding.as_ref().ok_or(Exceptions::illegalState)?.name()
+            != encoding.as_ref().ok_or(Exceptions::ILLEGAL_STATE)?.name()
         {
             if let Some(eci) =
-                CharacterSetECI::getCharacterSetECI(encoding.ok_or(Exceptions::illegalState)?)
+                CharacterSetECI::getCharacterSetECI(encoding.ok_or(Exceptions::ILLEGAL_STATE)?)
             {
                 encodingECI(CharacterSetECI::getValue(&eci) as i32, &mut sb)?;
             }
@@ -225,7 +225,7 @@ pub fn encodeHighLevel(
         Compaction::BYTE => {
             let msgBytes = encoding
                 .as_ref()
-                .ok_or(Exceptions::illegalState)?
+                .ok_or(Exceptions::ILLEGAL_STATE)?
                 .encode(&input.to_string(), encoding::EncoderTrap::Strict)
                 .unwrap_or_default(); //input.to_string().getBytes(encoding);
             encodeBinary(
@@ -237,7 +237,7 @@ pub fn encodeHighLevel(
             )?;
         }
         Compaction::NUMERIC => {
-            sb.push(char::from_u32(LATCH_TO_NUMERIC).ok_or(Exceptions::parse)?);
+            sb.push(char::from_u32(LATCH_TO_NUMERIC).ok_or(Exceptions::PARSE)?);
             encodeNumeric(&input, p, len as u32, &mut sb)?;
         }
         _ => {
@@ -252,7 +252,7 @@ pub fn encodeHighLevel(
                 }
                 let n = determineConsecutiveDigitCount(&input, p)?;
                 if n >= 13 {
-                    sb.push(char::from_u32(LATCH_TO_NUMERIC).ok_or(Exceptions::parse)?);
+                    sb.push(char::from_u32(LATCH_TO_NUMERIC).ok_or(Exceptions::PARSE)?);
                     encodingMode = NUMERIC_COMPACTION;
                     textSubMode = SUBMODE_ALPHA; //Reset after latch
                     encodeNumeric(&input, p, n, &mut sb)?;
@@ -261,7 +261,7 @@ pub fn encodeHighLevel(
                     let t = determineConsecutiveTextCount(&input, p)?;
                     if t >= 5 || n == len as u32 {
                         if encodingMode != TEXT_COMPACTION {
-                            sb.push(char::from_u32(LATCH_TO_TEXT).ok_or(Exceptions::parse)?);
+                            sb.push(char::from_u32(LATCH_TO_TEXT).ok_or(Exceptions::PARSE)?);
                             encodingMode = TEXT_COMPACTION;
                             textSubMode = SUBMODE_ALPHA; //start with submode alpha after latch
                         }
@@ -285,7 +285,7 @@ pub fn encodeHighLevel(
                                 .collect::<String>();
                             if let Ok(enc_str) = encoding
                                 .as_ref()
-                                .ok_or(Exceptions::illegalState)?
+                                .ok_or(Exceptions::ILLEGAL_STATE)?
                                 .encode(&str, encoding::EncoderTrap::Strict)
                             {
                                 Some(enc_str)
@@ -301,7 +301,7 @@ pub fn encodeHighLevel(
                                 encodeMultiECIBinary(&input, p, 1, TEXT_COMPACTION, &mut sb)?;
                             } else {
                                 encodeBinary(
-                                    bytes.as_ref().ok_or(Exceptions::illegalState)?,
+                                    bytes.as_ref().ok_or(Exceptions::ILLEGAL_STATE)?,
                                     0,
                                     1,
                                     TEXT_COMPACTION,
@@ -314,9 +314,9 @@ pub fn encodeHighLevel(
                                 encodeMultiECIBinary(&input, p, p + b, encodingMode, &mut sb)?;
                             } else {
                                 encodeBinary(
-                                    bytes.as_ref().ok_or(Exceptions::illegalState)?,
+                                    bytes.as_ref().ok_or(Exceptions::ILLEGAL_STATE)?,
                                     0,
-                                    bytes.as_ref().ok_or(Exceptions::illegalState)?.len() as u32,
+                                    bytes.as_ref().ok_or(Exceptions::ILLEGAL_STATE)?.len() as u32,
                                     encodingMode,
                                     &mut sb,
                                 )?;
@@ -367,7 +367,7 @@ fn encodeText<T: ECIInput + ?Sized>(
                         if ch == ' ' {
                             tmp.push(26 as char); //space
                         } else {
-                            tmp.push(char::from_u32(ch as u32 - 65).ok_or(Exceptions::parse)?);
+                            tmp.push(char::from_u32(ch as u32 - 65).ok_or(Exceptions::PARSE)?);
                         }
                     } else if isAlphaLower(ch) {
                         submode = SUBMODE_LOWER;
@@ -381,7 +381,7 @@ fn encodeText<T: ECIInput + ?Sized>(
                         tmp.push(29 as char); //ps
                         tmp.push(
                             char::from_u32(PUNCTUATION[ch as usize] as u32)
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     }
                 }
@@ -391,11 +391,11 @@ fn encodeText<T: ECIInput + ?Sized>(
                         if ch == ' ' {
                             tmp.push(26 as char); //space
                         } else {
-                            tmp.push(char::from_u32(ch as u32 - 97).ok_or(Exceptions::parse)?);
+                            tmp.push(char::from_u32(ch as u32 - 97).ok_or(Exceptions::PARSE)?);
                         }
                     } else if isAlphaUpper(ch) {
                         tmp.push(27 as char); //as
-                        tmp.push(char::from_u32(ch as u32 - 65).ok_or(Exceptions::parse)?);
+                        tmp.push(char::from_u32(ch as u32 - 65).ok_or(Exceptions::PARSE)?);
                         //space cannot happen here, it is also in "Lower"
                     } else if isMixed(ch) {
                         submode = SUBMODE_MIXED;
@@ -405,7 +405,7 @@ fn encodeText<T: ECIInput + ?Sized>(
                         tmp.push(29 as char); //ps
                         tmp.push(
                             char::from_u32(PUNCTUATION[ch as usize] as u32)
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     }
                 }
@@ -413,7 +413,7 @@ fn encodeText<T: ECIInput + ?Sized>(
                 SUBMODE_MIXED => {
                     if isMixed(ch) {
                         tmp.push(
-                            char::from_u32(MIXED[ch as usize] as u32).ok_or(Exceptions::parse)?,
+                            char::from_u32(MIXED[ch as usize] as u32).ok_or(Exceptions::PARSE)?,
                         );
                     } else if isAlphaUpper(ch) {
                         submode = SUBMODE_ALPHA;
@@ -435,7 +435,7 @@ fn encodeText<T: ECIInput + ?Sized>(
                         tmp.push(29 as char); //ps
                         tmp.push(
                             char::from_u32(PUNCTUATION[ch as usize] as u32)
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     }
                 }
@@ -445,7 +445,7 @@ fn encodeText<T: ECIInput + ?Sized>(
                     if isPunctuation(ch) {
                         tmp.push(
                             char::from_u32(PUNCTUATION[ch as usize] as u32)
-                                .ok_or(Exceptions::parse)?,
+                                .ok_or(Exceptions::PARSE)?,
                         );
                     } else {
                         submode = SUBMODE_ALPHA;
@@ -466,16 +466,16 @@ fn encodeText<T: ECIInput + ?Sized>(
         let odd = (i % 2) != 0;
         if odd {
             h = char::from_u32(
-                (h as u32 * 30) + tmp.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)? as u32,
+                (h as u32 * 30) + tmp.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u32,
             )
-            .ok_or(Exceptions::parse)?;
+            .ok_or(Exceptions::PARSE)?;
             sb.push(h);
         } else {
-            h = tmp.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)?;
+            h = tmp.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
         }
     }
     if (len % 2) != 0 {
-        sb.push(char::from_u32((h as u32 * 30) + 29).ok_or(Exceptions::parse)?);
+        sb.push(char::from_u32((h as u32 * 30) + 29).ok_or(Exceptions::PARSE)?);
         //ps
     }
     Ok(submode)
@@ -563,11 +563,11 @@ fn encodeBinary(
     sb: &mut String,
 ) -> Result<()> {
     if count == 1 && startmode == TEXT_COMPACTION {
-        sb.push(char::from_u32(SHIFT_TO_BYTE).ok_or(Exceptions::parse)?);
+        sb.push(char::from_u32(SHIFT_TO_BYTE).ok_or(Exceptions::PARSE)?);
     } else if (count % 6) == 0 {
-        sb.push(char::from_u32(LATCH_TO_BYTE).ok_or(Exceptions::parse)?);
+        sb.push(char::from_u32(LATCH_TO_BYTE).ok_or(Exceptions::PARSE)?);
     } else {
-        sb.push(char::from_u32(LATCH_TO_BYTE_PADDED).ok_or(Exceptions::parse)?);
+        sb.push(char::from_u32(LATCH_TO_BYTE_PADDED).ok_or(Exceptions::PARSE)?);
     }
 
     let mut idx = startpos;
@@ -581,7 +581,7 @@ fn encodeBinary(
                 t += bytes[idx as usize + i as usize] as i64;
             }
             for ch in &mut chars {
-                *ch = char::from_u32((t % 900) as u32).ok_or(Exceptions::parse)?;
+                *ch = char::from_u32((t % 900) as u32).ok_or(Exceptions::PARSE)?;
                 t /= 900;
             }
             sb.push_str(&chars.into_iter().rev().collect::<String>());
@@ -625,13 +625,13 @@ fn encodeNumeric<T: ECIInput + ?Sized>(
         );
         // let mut bigint: u128 = part.parse().map_err(|_| Exceptions::parseEmpty())?;
         let mut bigint = num::BigUint::from_str(&part)
-            .map_err(|e| Exceptions::parseWith(format!("issue parsing {part}: {e}")))?; // part.parse().map_err(|_| Exceptions::parseEmpty())?;
+            .map_err(|e| Exceptions::parse_with(format!("issue parsing {part}: {e}")))?; // part.parse().map_err(|_| Exceptions::parseEmpty())?;
         loop {
             tmp.push(
                 char::from_u32((&bigint % &NUM900).try_into().map_err(|e| {
-                    Exceptions::parseWith(format!("erorr converting {bigint} to u32: {e}"))
+                    Exceptions::parse_with(format!("erorr converting {bigint} to u32: {e}"))
                 })?)
-                .ok_or(Exceptions::parse)?,
+                .ok_or(Exceptions::PARSE)?,
             );
             bigint /= &NUM900;
 
@@ -777,10 +777,10 @@ fn determineConsecutiveBinaryCount<T: ECIInput + ?Sized + 'static>(
 
             if !can_encode {
                 if TypeId::of::<T>() != TypeId::of::<NoECIInput>() {
-                    return Err(Exceptions::illegalStateWith("expected NoECIInput type"));
+                    return Err(Exceptions::illegal_state_with("expected NoECIInput type"));
                 }
                 let ch = input.charAt(idx)?;
-                return Err(Exceptions::writerWith(format!(
+                return Err(Exceptions::writer_with(format!(
                     "Non-encodable character detected: {} (Unicode: {})",
                     ch, ch as u32
                 )));
@@ -793,17 +793,17 @@ fn determineConsecutiveBinaryCount<T: ECIInput + ?Sized + 'static>(
 
 fn encodingECI(eci: i32, sb: &mut String) -> Result<()> {
     if (0..900).contains(&eci) {
-        sb.push(char::from_u32(ECI_CHARSET).ok_or(Exceptions::parse)?);
-        sb.push(char::from_u32(eci as u32).ok_or(Exceptions::parse)?);
+        sb.push(char::from_u32(ECI_CHARSET).ok_or(Exceptions::PARSE)?);
+        sb.push(char::from_u32(eci as u32).ok_or(Exceptions::PARSE)?);
     } else if eci < 810900 {
-        sb.push(char::from_u32(ECI_GENERAL_PURPOSE).ok_or(Exceptions::parse)?);
-        sb.push(char::from_u32((eci / 900 - 1) as u32).ok_or(Exceptions::parse)?);
-        sb.push(char::from_u32((eci % 900) as u32).ok_or(Exceptions::parse)?);
+        sb.push(char::from_u32(ECI_GENERAL_PURPOSE).ok_or(Exceptions::PARSE)?);
+        sb.push(char::from_u32((eci / 900 - 1) as u32).ok_or(Exceptions::PARSE)?);
+        sb.push(char::from_u32((eci % 900) as u32).ok_or(Exceptions::PARSE)?);
     } else if eci < 811800 {
-        sb.push(char::from_u32(ECI_USER_DEFINED).ok_or(Exceptions::parse)?);
-        sb.push(char::from_u32((810900 - eci) as u32).ok_or(Exceptions::parse)?);
+        sb.push(char::from_u32(ECI_USER_DEFINED).ok_or(Exceptions::PARSE)?);
+        sb.push(char::from_u32((810900 - eci) as u32).ok_or(Exceptions::PARSE)?);
     } else {
-        return Err(Exceptions::writerWith(format!(
+        return Err(Exceptions::writer_with(format!(
             "ECI number not in valid range from 0..811799, but was {eci}"
         )));
     }
@@ -820,7 +820,7 @@ impl ECIInput for NoECIInput {
         self.0
             .chars()
             .nth(index)
-            .ok_or(Exceptions::indexOutOfBounds)
+            .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)
     }
 
     fn subSequence(&self, start: usize, end: usize) -> Result<Vec<char>> {
diff --git a/src/pdf417/pdf_417_reader.rs b/src/pdf417/pdf_417_reader.rs
index c37d833..bb954cc 100644
--- a/src/pdf417/pdf_417_reader.rs
+++ b/src/pdf417/pdf_417_reader.rs
@@ -54,7 +54,7 @@ impl Reader for PDF417Reader {
     ) -> Result<crate::RXingResult> {
         let result = Self::decode(image, hints, false)?;
         if result.is_empty() {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         Ok(result[0].clone())
     }
@@ -124,7 +124,7 @@ impl PDF417Reader {
                         pdf417RXingResultMetadata
                             .clone()
                             .downcast::<PDF417RXingResultMetadata>()
-                            .map_err(|_| Exceptions::illegalState)?,
+                            .map_err(|_| Exceptions::ILLEGAL_STATE)?,
                     );
                     result.putMetadata(RXingResultMetadataType::PDF417_EXTRA_METADATA, data);
                 }
diff --git a/src/pdf417/pdf_417_writer.rs b/src/pdf417/pdf_417_writer.rs
index 1e13b2e..10c46db 100644
--- a/src/pdf417/pdf_417_writer.rs
+++ b/src/pdf417/pdf_417_writer.rs
@@ -60,7 +60,7 @@ impl Writer for PDF417Writer {
         hints: &crate::EncodingHintDictionary,
     ) -> Result<crate::common::BitMatrix> {
         if format != &BarcodeFormat::PDF_417 {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Can only encode PDF_417, but got {format}"
             )));
         }
@@ -150,7 +150,7 @@ impl PDF417Writer {
         let mut originalScale = encoder
             .getBarcodeMatrix()
             .as_ref()
-            .ok_or(Exceptions::illegalState)?
+            .ok_or(Exceptions::ILLEGAL_STATE)?
             .getScaledMatrix(1, aspectRatio);
         let mut rotated = false;
         if (height > width) != (originalScale[0].len() < originalScale.len()) {
@@ -166,16 +166,16 @@ impl PDF417Writer {
             let mut scaledMatrix = encoder
                 .getBarcodeMatrix()
                 .as_ref()
-                .ok_or(Exceptions::illegalState)?
+                .ok_or(Exceptions::ILLEGAL_STATE)?
                 .getScaledMatrix(scale, scale * aspectRatio);
             if rotated {
                 scaledMatrix = Self::rotateArray(&scaledMatrix);
             }
             return Self::bitMatrixFromBitArray(&scaledMatrix, margin)
-                .ok_or(Exceptions::illegalState);
+                .ok_or(Exceptions::ILLEGAL_STATE);
         }
 
-        Self::bitMatrixFromBitArray(&originalScale, margin).ok_or(Exceptions::illegalState)
+        Self::bitMatrixFromBitArray(&originalScale, margin).ok_or(Exceptions::ILLEGAL_STATE)
     }
 
     /**
diff --git a/src/planar_yuv_luminance_source.rs b/src/planar_yuv_luminance_source.rs
index a3a6d4f..adeb526 100644
--- a/src/planar_yuv_luminance_source.rs
+++ b/src/planar_yuv_luminance_source.rs
@@ -167,7 +167,7 @@ impl PlanarYUVLuminanceSource {
         inverted: bool,
     ) -> Result<Self> {
         if left + width > data_width || top + height > data_height {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Crop rectangle does not fit within image data.",
             ));
         }
@@ -329,7 +329,7 @@ impl LuminanceSource for PlanarYUVLuminanceSource {
             self.invert,
         ) {
             Ok(new) => Ok(Box::new(new)),
-            Err(_err) => Err(Exceptions::unsupportedOperation),
+            Err(_err) => Err(Exceptions::UNSUPPORTED_OPERATION),
         }
     }
 
diff --git a/src/qrcode/decoder/bit_matrix_parser.rs b/src/qrcode/decoder/bit_matrix_parser.rs
index 8ef056c..9b148ec 100644
--- a/src/qrcode/decoder/bit_matrix_parser.rs
+++ b/src/qrcode/decoder/bit_matrix_parser.rs
@@ -39,7 +39,7 @@ impl BitMatrixParser {
     pub fn new(bit_matrix: BitMatrix) -> Result<Self> {
         let dimension = bit_matrix.getHeight();
         if dimension < 21 || (dimension & 0x03) != 1 {
-            Err(Exceptions::formatWith(format!(
+            Err(Exceptions::format_with(format!(
                 "{dimension} < 21 || ({dimension} % 0x03) != 1"
             )))
         } else {
@@ -61,7 +61,7 @@ impl BitMatrixParser {
      */
     pub fn readFormatInformation(&mut self) -> Result<&FormatInformation> {
         if self.parsedFormatInfo.is_some() {
-            return self.parsedFormatInfo.as_ref().ok_or(Exceptions::parse);
+            return self.parsedFormatInfo.as_ref().ok_or(Exceptions::PARSE);
         }
 
         // Read top-left format info bits
@@ -92,7 +92,7 @@ impl BitMatrixParser {
         self.parsedFormatInfo =
             FormatInformation::decodeFormatInformation(formatInfoBits1, formatInfoBits2);
 
-        self.parsedFormatInfo.as_ref().ok_or(Exceptions::format)
+        self.parsedFormatInfo.as_ref().ok_or(Exceptions::FORMAT)
     }
 
     /**
@@ -144,7 +144,7 @@ impl BitMatrixParser {
                 return Ok(theParsedVersion);
             }
         }
-        Err(Exceptions::format)
+        Err(Exceptions::FORMAT)
     }
 
     fn copyBit(&self, i: u32, j: u32, versionBits: u32) -> u32 {
@@ -225,7 +225,7 @@ impl BitMatrixParser {
         }
 
         if resultOffset != version.getTotalCodewords() as usize {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         Ok(result)
     }
diff --git a/src/qrcode/decoder/data_block.rs b/src/qrcode/decoder/data_block.rs
index d3f3026..b9b6798 100755
--- a/src/qrcode/decoder/data_block.rs
+++ b/src/qrcode/decoder/data_block.rs
@@ -56,7 +56,7 @@ impl DataBlock {
         ecLevel: ErrorCorrectionLevel,
     ) -> Result<Vec<Self>> {
         if rawCodewords.len() as u32 != version.getTotalCodewords() {
-            return Err(Exceptions::illegalArgument);
+            return Err(Exceptions::ILLEGAL_ARGUMENT);
         }
 
         // Figure out the number and size of data blocks used by this version and
diff --git a/src/qrcode/decoder/data_mask.rs b/src/qrcode/decoder/data_mask.rs
index 6d8a284..0fb9173 100755
--- a/src/qrcode/decoder/data_mask.rs
+++ b/src/qrcode/decoder/data_mask.rs
@@ -228,7 +228,7 @@ impl TryFrom<u8> for DataMask {
             5 => Ok(DataMask::DATA_MASK_101),
             6 => Ok(DataMask::DATA_MASK_110),
             7 => Ok(DataMask::DATA_MASK_111),
-            _ => Err(Exceptions::illegalArgumentWith(format!(
+            _ => Err(Exceptions::illegal_argument_with(format!(
                 "{value} is not between 0 and 7"
             ))),
         }
diff --git a/src/qrcode/decoder/decoded_bit_stream_parser.rs b/src/qrcode/decoder/decoded_bit_stream_parser.rs
index 1e5302e..225e0ca 100644
--- a/src/qrcode/decoder/decoded_bit_stream_parser.rs
+++ b/src/qrcode/decoder/decoded_bit_stream_parser.rs
@@ -78,7 +78,7 @@ pub fn decode(
             }
             Mode::STRUCTURED_APPEND => {
                 if bits.available() < 16 {
-                    return Err(Exceptions::formatWith(format!(
+                    return Err(Exceptions::format_with(format!(
                         "Mode::Structured append expected bits.available() < 16, found bits of {}",
                         bits.available()
                     )));
@@ -93,7 +93,7 @@ pub fn decode(
                 let value = parseECIValue(&mut bits)?;
                 currentCharacterSetECI = CharacterSetECI::getCharacterSetECIByValue(value).ok();
                 if currentCharacterSetECI.is_none() {
-                    return Err(Exceptions::formatWith(format!(
+                    return Err(Exceptions::format_with(format!(
                         "Value of {value} not valid"
                     )));
                 }
@@ -132,7 +132,7 @@ pub fn decode(
                         currentCharacterSetECI,
                         hints,
                     )?,
-                    _ => return Err(Exceptions::format),
+                    _ => return Err(Exceptions::FORMAT),
                 }
             }
         }
@@ -177,7 +177,7 @@ pub fn decode(
 fn decodeHanziSegment(bits: &mut BitSource, result: &mut String, count: usize) -> Result<()> {
     // Don't crash trying to read more bits than we have available.
     if count * 13 > bits.available() {
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
 
     // Each character will require 2 bytes. Read the characters as 2-byte pairs
@@ -204,10 +204,10 @@ fn decodeHanziSegment(bits: &mut BitSource, result: &mut String, count: usize) -
     }
 
     let gb_encoder =
-        encoding::label::encoding_from_whatwg_label("GBK").ok_or(Exceptions::illegalState)?;
+        encoding::label::encoding_from_whatwg_label("GBK").ok_or(Exceptions::ILLEGAL_STATE)?;
     let encode_string = gb_encoder
         .decode(&buffer, encoding::DecoderTrap::Strict)
-        .map_err(|e| Exceptions::parseWith(format!("unable to decode buffer {buffer:?}: {e}")))?;
+        .map_err(|e| Exceptions::parse_with(format!("unable to decode buffer {buffer:?}: {e}")))?;
     result.push_str(&encode_string);
     Ok(())
 }
@@ -221,7 +221,7 @@ fn decodeKanjiSegment(
 ) -> Result<()> {
     // Don't crash trying to read more bits than we have available.
     if count * 13 > bits.available() {
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
 
     // Each character will require 2 bytes. Read the characters as 2-byte pairs
@@ -250,7 +250,7 @@ fn decodeKanjiSegment(
     let encoder = {
         let _ = currentCharacterSetECI;
         let _ = hints;
-        encoding::label::encoding_from_whatwg_label("SJIS").ok_or(Exceptions::format)?
+        encoding::label::encoding_from_whatwg_label("SJIS").ok_or(Exceptions::FORMAT)?
     };
 
     #[cfg(feature = "allow_forced_iso_ied_18004_compliance")]
@@ -263,12 +263,12 @@ fn decodeKanjiSegment(
             encoding::all::ISO_8859_1
         }
     } else {
-        encoding::label::encoding_from_whatwg_label("SJIS").ok_or(Exceptions::format)?
+        encoding::label::encoding_from_whatwg_label("SJIS").ok_or(Exceptions::FORMAT)?
     };
 
     let encode_string = encoder
         .decode(&buffer, encoding::DecoderTrap::Strict)
-        .map_err(|e| Exceptions::parseWith(format!("unable to decode buffer {buffer:?}: {e}")))?;
+        .map_err(|e| Exceptions::parse_with(format!("unable to decode buffer {buffer:?}: {e}")))?;
 
     result.push_str(&encode_string);
 
@@ -285,7 +285,7 @@ fn decodeByteSegment(
 ) -> Result<()> {
     // Don't crash trying to read more bits than we have available.
     if 8 * count > bits.available() {
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
 
     let mut readBytes = vec![0u8; count];
@@ -301,7 +301,7 @@ fn decodeByteSegment(
         // give a hint.
         {
             #[cfg(not(feature = "allow_forced_iso_ied_18004_compliance"))]
-            StringUtils::guessCharset(&readBytes, hints).ok_or(Exceptions::illegalState)?
+            StringUtils::guessCharset(&readBytes, hints).ok_or(Exceptions::ILLEGAL_STATE)?
         }
 
         #[cfg(feature = "allow_forced_iso_ied_18004_compliance")]
@@ -316,14 +316,14 @@ fn decodeByteSegment(
         CharacterSetECI::getCharset(
             currentCharacterSetECI
                 .as_ref()
-                .ok_or(Exceptions::illegalState)?,
+                .ok_or(Exceptions::ILLEGAL_STATE)?,
         )
     };
 
     let encode_string = if currentCharacterSetECI.is_some()
         && currentCharacterSetECI
             .as_ref()
-            .ok_or(Exceptions::illegalState)?
+            .ok_or(Exceptions::ILLEGAL_STATE)?
             == &CharacterSetECI::Cp437
     {
         {
@@ -336,7 +336,7 @@ fn decodeByteSegment(
         encoding
             .decode(&readBytes, encoding::DecoderTrap::Strict)
             .map_err(|e| {
-                Exceptions::parseWith(format!("unable to decode buffer {readBytes:?}: {e}"))
+                Exceptions::parse_with(format!("unable to decode buffer {readBytes:?}: {e}"))
             })?
     };
 
@@ -348,13 +348,13 @@ fn decodeByteSegment(
 
 fn toAlphaNumericChar(value: u32) -> Result<char> {
     if value as usize >= ALPHANUMERIC_CHARS.len() {
-        return Err(Exceptions::format);
+        return Err(Exceptions::FORMAT);
     }
 
     ALPHANUMERIC_CHARS
         .chars()
         .nth(value as usize)
-        .ok_or(Exceptions::format)
+        .ok_or(Exceptions::FORMAT)
 }
 
 fn decodeAlphanumericSegment(
@@ -368,7 +368,7 @@ fn decodeAlphanumericSegment(
     let mut count = count;
     while count > 1 {
         if bits.available() < 11 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         let nextTwoCharsBits = bits.readBits(11)?;
         result.push(toAlphaNumericChar(nextTwoCharsBits / 45)?);
@@ -378,7 +378,7 @@ fn decodeAlphanumericSegment(
     if count == 1 {
         // special case: one character left
         if bits.available() < 6 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         result.push(toAlphaNumericChar(bits.readBits(6)?)?);
     }
@@ -386,12 +386,12 @@ fn decodeAlphanumericSegment(
     if fc1InEffect {
         // We need to massage the result a bit if in an FNC1 mode:
         for i in start..result.len() {
-            if result.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)? == '%' {
+            if result.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? == '%' {
                 if i < result.len() - 1
                     && result
                         .chars()
                         .nth(i + 1)
-                        .ok_or(Exceptions::indexOutOfBounds)?
+                        .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
                         == '%'
                 {
                     // %% is rendered as %
@@ -413,11 +413,11 @@ fn decodeNumericSegment(bits: &mut BitSource, result: &mut String, count: usize)
     while count >= 3 {
         // Each 10 bits encodes three digits
         if bits.available() < 10 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         let threeDigitsBits = bits.readBits(10)?;
         if threeDigitsBits >= 1000 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         result.push(toAlphaNumericChar(threeDigitsBits / 100)?);
         result.push(toAlphaNumericChar((threeDigitsBits / 10) % 10)?);
@@ -427,22 +427,22 @@ fn decodeNumericSegment(bits: &mut BitSource, result: &mut String, count: usize)
     if count == 2 {
         // Two digits left over to read, encoded in 7 bits
         if bits.available() < 7 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         let twoDigitsBits = bits.readBits(7)?;
         if twoDigitsBits >= 100 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         result.push(toAlphaNumericChar(twoDigitsBits / 10)?);
         result.push(toAlphaNumericChar(twoDigitsBits % 10)?);
     } else if count == 1 {
         // One digit left over to read
         if bits.available() < 4 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         let digitBits = bits.readBits(4)?;
         if digitBits >= 10 {
-            return Err(Exceptions::format);
+            return Err(Exceptions::FORMAT);
         }
         result.push(toAlphaNumericChar(digitBits)?);
     }
@@ -467,5 +467,5 @@ fn parseECIValue(bits: &mut BitSource) -> Result<u32> {
         return Ok(((firstByte & 0x1F) << 16) | secondThirdBytes);
     }
 
-    Err(Exceptions::format)
+    Err(Exceptions::FORMAT)
 }
diff --git a/src/qrcode/decoder/error_correction_level.rs b/src/qrcode/decoder/error_correction_level.rs
index a8f4d56..9b61495 100644
--- a/src/qrcode/decoder/error_correction_level.rs
+++ b/src/qrcode/decoder/error_correction_level.rs
@@ -48,7 +48,7 @@ impl ErrorCorrectionLevel {
             1 => Ok(Self::L),
             2 => Ok(Self::H),
             3 => Ok(Self::Q),
-            _ => Err(Exceptions::illegalArgumentWith(format!(
+            _ => Err(Exceptions::illegal_argument_with(format!(
                 "{bits} is not a valid bit selection"
             ))),
         }
@@ -110,7 +110,7 @@ impl FromStr for ErrorCorrectionLevel {
             return number_possible.try_into();
         }
 
-        return Err(Exceptions::illegalArgumentWith(format!(
+        return Err(Exceptions::illegal_argument_with(format!(
             "could not parse {s} into an ec level"
         )));
     }
diff --git a/src/qrcode/decoder/mode.rs b/src/qrcode/decoder/mode.rs
index 99b5f8c..ab726f1 100644
--- a/src/qrcode/decoder/mode.rs
+++ b/src/qrcode/decoder/mode.rs
@@ -69,7 +69,7 @@ impl Mode {
             {
                 Ok(Self::HANZI)
             }
-            _ => Err(Exceptions::illegalArgumentWith(format!(
+            _ => Err(Exceptions::illegal_argument_with(format!(
                 "{bits} is not valid"
             ))),
         }
diff --git a/src/qrcode/decoder/qrcode_decoder.rs b/src/qrcode/decoder/qrcode_decoder.rs
index 1c6aea1..5ed9131 100644
--- a/src/qrcode/decoder/qrcode_decoder.rs
+++ b/src/qrcode/decoder/qrcode_decoder.rs
@@ -129,7 +129,7 @@ pub fn decode_bitmatrix_with_hints(
                 if let Some(fe) = fe {
                     Err(fe)
                 } else {
-                    Err(ce.unwrap_or(Exceptions::checksum))
+                    Err(ce.unwrap_or(Exceptions::CHECKSUM))
                 }
             }
             _ => Err(er),
diff --git a/src/qrcode/decoder/version.rs b/src/qrcode/decoder/version.rs
index f1954c3..8ca060b 100755
--- a/src/qrcode/decoder/version.rs
+++ b/src/qrcode/decoder/version.rs
@@ -102,14 +102,14 @@ impl Version {
      */
     pub fn getProvisionalVersionForDimension(dimension: u32) -> Result<&'static Version> {
         if dimension % 4 != 1 {
-            return Err(Exceptions::formatWith("dimension incorrect"));
+            return Err(Exceptions::format_with("dimension incorrect"));
         }
         Self::getVersionForNumber((dimension - 17) / 4)
     }
 
     pub fn getVersionForNumber(versionNumber: u32) -> Result<&'static Version> {
         if !(1..=40).contains(&versionNumber) {
-            return Err(Exceptions::illegalArgumentWith("version out of spec"));
+            return Err(Exceptions::illegal_argument_with("version out of spec"));
         }
         Ok(&VERSIONS[versionNumber as usize - 1])
     }
@@ -137,7 +137,7 @@ impl Version {
             return Self::getVersionForNumber(bestVersion);
         }
         // If we didn't find a close enough match, fail
-        Err(Exceptions::notFound)
+        Err(Exceptions::NOT_FOUND)
     }
 
     /**
diff --git a/src/qrcode/detector/alignment_pattern_finder.rs b/src/qrcode/detector/alignment_pattern_finder.rs
index 1197f8d..5b252c7 100644
--- a/src/qrcode/detector/alignment_pattern_finder.rs
+++ b/src/qrcode/detector/alignment_pattern_finder.rs
@@ -164,9 +164,9 @@ impl AlignmentPatternFinder {
             Ok(*(self
                 .possibleCenters
                 .get(0)
-                .ok_or(Exceptions::indexOutOfBounds))?)
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS))?)
         } else {
-            Err(Exceptions::notFound)
+            Err(Exceptions::NOT_FOUND)
         }
     }
 
diff --git a/src/qrcode/detector/finder_pattern_finder.rs b/src/qrcode/detector/finder_pattern_finder.rs
index 53df7d8..eeeaca4 100755
--- a/src/qrcode/detector/finder_pattern_finder.rs
+++ b/src/qrcode/detector/finder_pattern_finder.rs
@@ -695,7 +695,7 @@ impl<'a> FinderPatternFinder<'_> {
         let startSize = self.possibleCenters.len();
         if startSize < 3 {
             // Couldn't find enough finder patterns
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         self.possibleCenters
@@ -712,19 +712,19 @@ impl<'a> FinderPatternFinder<'_> {
 
         for i in 0..self.possibleCenters.len() {
             let Some(fpi) = self.possibleCenters.get(i) else {
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             };
             let minModuleSize = fpi.getEstimatedModuleSize();
 
             for j in (i + 1)..(self.possibleCenters.len() - 1) {
                 let Some(fpj) =  self.possibleCenters.get(j) else {
-                    return Err(Exceptions::notFound);
+                    return Err(Exceptions::NOT_FOUND);
                 };
                 let squares0 = Self::squaredDistance(fpi, fpj);
 
                 for k in (j + 1)..(self.possibleCenters.len()) {
                     let Some(fpk) = self.possibleCenters.get(k) else {
-                        return Err(Exceptions::notFound);
+                        return Err(Exceptions::NOT_FOUND);
                     };
                     let maxModuleSize = fpk.getEstimatedModuleSize();
                     if maxModuleSize > minModuleSize * 1.4 {
@@ -776,16 +776,16 @@ impl<'a> FinderPatternFinder<'_> {
         }
 
         if distortion == f64::MAX {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         if bestPatterns[0].is_none() {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
-        let p1 = bestPatterns[0].ok_or(Exceptions::notFound)?;
-        let p2 = bestPatterns[1].ok_or(Exceptions::notFound)?;
-        let p3 = bestPatterns[2].ok_or(Exceptions::notFound)?;
+        let p1 = bestPatterns[0].ok_or(Exceptions::NOT_FOUND)?;
+        let p2 = bestPatterns[1].ok_or(Exceptions::NOT_FOUND)?;
+        let p3 = bestPatterns[2].ok_or(Exceptions::NOT_FOUND)?;
 
         Ok([p1, p2, p3])
     }
diff --git a/src/qrcode/detector/qrcode_detector.rs b/src/qrcode/detector/qrcode_detector.rs
index af84bfc..1d61e57 100644
--- a/src/qrcode/detector/qrcode_detector.rs
+++ b/src/qrcode/detector/qrcode_detector.rs
@@ -103,7 +103,7 @@ impl<'a> Detector<'_> {
 
         let moduleSize = self.calculateModuleSize(topLeft, topRight, bottomLeft);
         if moduleSize < 1.0 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         let dimension = Self::computeDimension(topLeft, topRight, bottomLeft, moduleSize)?;
         let provisionalVersion = Version::getProvisionalVersionForDimension(dimension)?;
@@ -145,7 +145,7 @@ impl<'a> Detector<'_> {
             alignmentPattern.as_ref(),
             dimension,
         )
-        .ok_or(Exceptions::notFound)?;
+        .ok_or(Exceptions::NOT_FOUND)?;
 
         let bits = Detector::sampleGrid(self.image, &transform, dimension)?;
 
@@ -156,7 +156,7 @@ impl<'a> Detector<'_> {
         ];
 
         if alignmentPattern.is_some() {
-            points.push(alignmentPattern.ok_or(Exceptions::notFound)?.into())
+            points.push(alignmentPattern.ok_or(Exceptions::NOT_FOUND)?.into())
         }
 
         Ok(QRCodeDetectorResult::new(bits, points))
@@ -240,7 +240,7 @@ impl<'a> Detector<'_> {
         match dimension & 0x03 {
             0 => dimension += 1,
             2 => dimension -= 1,
-            3 => return Err(Exceptions::notFound),
+            3 => return Err(Exceptions::NOT_FOUND),
             _ => {}
         }
         Ok(dimension as u32)
@@ -436,13 +436,13 @@ impl<'a> Detector<'_> {
         let alignmentAreaLeftX = 0.max(estAlignmentX as i32 - allowance as i32) as u32;
         let alignmentAreaRightX = (self.image.getWidth() - 1).min(estAlignmentX + allowance);
         if ((alignmentAreaRightX - alignmentAreaLeftX) as f32) < overallEstModuleSize * 3.0 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let alignmentAreaTopY = 0.max(estAlignmentY as i32 - allowance as i32) as u32;
         let alignmentAreaBottomY = (self.image.getHeight() - 1).min(estAlignmentY + allowance);
         if alignmentAreaBottomY - alignmentAreaTopY < overallEstModuleSize as u32 * 3 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         let mut alignmentFinder = AlignmentPatternFinder::new(
diff --git a/src/qrcode/encoder/mask_util.rs b/src/qrcode/encoder/mask_util.rs
index 7b0fac9..c037859 100644
--- a/src/qrcode/encoder/mask_util.rs
+++ b/src/qrcode/encoder/mask_util.rs
@@ -175,7 +175,7 @@ pub fn getDataMaskBit(maskPattern: u32, x: u32, y: u32) -> Result<bool> {
             ((temp % 3) + ((y + x) & 0x1)) & 0x1
         }
         _ => {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "Invalid mask pattern: {maskPattern}"
             )))
         }
diff --git a/src/qrcode/encoder/matrix_util.rs b/src/qrcode/encoder/matrix_util.rs
index f5d3495..ab68171 100644
--- a/src/qrcode/encoder/matrix_util.rs
+++ b/src/qrcode/encoder/matrix_util.rs
@@ -274,7 +274,7 @@ pub fn embedDataBits(dataBits: &BitArray, maskPattern: i32, matrix: &mut ByteMat
     }
     // All bits should be consumed.
     if bitIndex != dataBits.getSize() {
-        return Err(Exceptions::writerWith(format!(
+        return Err(Exceptions::writer_with(format!(
             "Not all bits consumed: {}/{}",
             bitIndex,
             dataBits.getSize()
@@ -319,7 +319,7 @@ pub fn findMSBSet(value: u32) -> u32 {
 // operations. We don't care if coefficients are positive or negative.
 pub fn calculateBCHCode(value: u32, poly: u32) -> Result<u32> {
     if poly == 0 {
-        return Err(Exceptions::illegalArgumentWith("0 polynomial"));
+        return Err(Exceptions::illegal_argument_with("0 polynomial"));
     }
     let mut value = value;
     // If poly is "1 1111 0010 0101" (version info poly), msbSetInPoly is 13. We'll subtract 1
@@ -343,7 +343,7 @@ pub fn makeTypeInfoBits(
     bits: &mut BitArray,
 ) -> Result<()> {
     if !QRCode::isValidMaskPattern(maskPattern as i32) {
-        return Err(Exceptions::writerWith("Invalid mask pattern"));
+        return Err(Exceptions::writer_with("Invalid mask pattern"));
     }
     let typeInfo = (ecLevel.get_value() << 3) as u32 | maskPattern;
     bits.appendBits(typeInfo, 5)?;
@@ -357,7 +357,7 @@ pub fn makeTypeInfoBits(
 
     if bits.getSize() != 15 {
         // Just in case.
-        return Err(Exceptions::writerWith(format!(
+        return Err(Exceptions::writer_with(format!(
             "should not happen but we got: {}",
             bits.getSize()
         )));
@@ -374,7 +374,7 @@ pub fn makeVersionInfoBits(version: &Version, bits: &mut BitArray) -> Result<()>
 
     if bits.getSize() != 18 {
         // Just in case.
-        return Err(Exceptions::writerWith(format!(
+        return Err(Exceptions::writer_with(format!(
             "should not happen but we got: {}",
             bits.getSize()
         )));
@@ -407,7 +407,7 @@ pub fn embedTimingPatterns(matrix: &mut ByteMatrix) {
 // Embed the lonely dark dot at left bottom corner. JISX0510:2004 (p.46)
 pub fn embedDarkDotAtLeftBottomCorner(matrix: &mut ByteMatrix) -> Result<()> {
     if matrix.get(8, matrix.getHeight() - 8) == 0 {
-        return Err(Exceptions::writer);
+        return Err(Exceptions::WRITER);
     }
     matrix.set(8, matrix.getHeight() - 8, 1);
     Ok(())
@@ -420,7 +420,7 @@ pub fn embedHorizontalSeparationPattern(
 ) -> Result<()> {
     for x in 0..8 {
         if !isEmpty(matrix.get(xStart + x, yStart)) {
-            return Err(Exceptions::writer);
+            return Err(Exceptions::WRITER);
         }
         matrix.set(xStart + x, yStart, 0);
     }
@@ -434,7 +434,7 @@ pub fn embedVerticalSeparationPattern(
 ) -> Result<()> {
     for y in 0..7 {
         if !isEmpty(matrix.get(xStart, yStart + y)) {
-            return Err(Exceptions::writer);
+            return Err(Exceptions::WRITER);
         }
         matrix.set(xStart, yStart + y, 0);
     }
diff --git a/src/qrcode/encoder/minimal_encoder.rs b/src/qrcode/encoder/minimal_encoder.rs
index 4a1d11c..6de4413 100644
--- a/src/qrcode/encoder/minimal_encoder.rs
+++ b/src/qrcode/encoder/minimal_encoder.rs
@@ -158,7 +158,7 @@ impl MinimalEncoder {
                 Self::getVersion(Self::getVersionSize(result.getVersion()))?,
                 &self.ecLevel,
             ) {
-                return Err(Exceptions::writerWith(format!(
+                return Err(Exceptions::writer_with(format!(
                     "Data too big for version {version}"
                 )));
             }
@@ -186,7 +186,7 @@ impl MinimalEncoder {
                 }
             }
             if smallestRXingResult < 0 {
-                return Err(Exceptions::writerWith("Data too big for any version"));
+                return Err(Exceptions::writer_with("Data too big for any version"));
             }
             Ok(results[smallestRXingResult as usize].clone())
         }
@@ -247,7 +247,7 @@ impl MinimalEncoder {
             Some(Mode::ALPHANUMERIC) => Ok(1),
             Some(Mode::BYTE) => Ok(3),
             Some(Mode::KANJI) | None => Ok(0),
-            _ => Err(Exceptions::illegalArgumentWith(format!(
+            _ => Err(Exceptions::illegal_argument_with(format!(
                 "Illegal mode {mode:?}"
             ))),
         }
@@ -262,21 +262,21 @@ impl MinimalEncoder {
         let vertexIndex = position
             + edge
                 .as_ref()
-                .ok_or(Exceptions::FormatException(None))?
+                .ok_or(Exceptions::FORMAT)?
                 .characterLength as usize;
         let modeEdges = &mut edges[vertexIndex][edge
             .as_ref()
-            .ok_or(Exceptions::FormatException(None))?
+            .ok_or(Exceptions::FORMAT)?
             .charsetEncoderIndex];
         let modeOrdinal = Self::getCompactedOrdinal(Some(
-            edge.as_ref().ok_or(Exceptions::FormatException(None))?.mode,
+            edge.as_ref().ok_or(Exceptions::FORMAT)?.mode,
         ))? as usize;
         if modeEdges[modeOrdinal].is_none()
             || modeEdges[modeOrdinal]
                 .as_ref()
-                .ok_or(Exceptions::format)?
+                .ok_or(Exceptions::FORMAT)?
                 .cachedTotalSize
-                > edge.as_ref().ok_or(Exceptions::format)?.cachedTotalSize
+                > edge.as_ref().ok_or(Exceptions::FORMAT)?.cachedTotalSize
         {
             modeEdges[modeOrdinal] = edge;
         }
@@ -299,12 +299,12 @@ impl MinimalEncoder {
                 .encoders
                 .canEncode(
                     &self.stringToEncode[from],
-                    priorityEncoderIndex.ok_or(Exceptions::format)?,
+                    priorityEncoderIndex.ok_or(Exceptions::FORMAT)?,
                 )
-                .ok_or(Exceptions::format)?
+                .ok_or(Exceptions::FORMAT)?
         {
-            start = priorityEncoderIndex.ok_or(Exceptions::format)?;
-            end = priorityEncoderIndex.ok_or(Exceptions::format)? + 1;
+            start = priorityEncoderIndex.ok_or(Exceptions::FORMAT)?;
+            end = priorityEncoderIndex.ok_or(Exceptions::FORMAT)? + 1;
         }
 
         for i in start..end {
@@ -313,10 +313,10 @@ impl MinimalEncoder {
                 .canEncode(
                     self.stringToEncode
                         .get(from)
-                        .ok_or(Exceptions::indexOutOfBounds)?,
+                        .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                     i,
                 )
-                .ok_or(Exceptions::format)?
+                .ok_or(Exceptions::FORMAT)?
             {
                 self.addEdge(
                     edges,
@@ -332,7 +332,7 @@ impl MinimalEncoder {
                             self.encoders.clone(),
                             self.stringToEncode.clone(),
                         )
-                        .ok_or(Exceptions::writer)?,
+                        .ok_or(Exceptions::WRITER)?,
                     )),
                 )?;
             }
@@ -340,7 +340,7 @@ impl MinimalEncoder {
 
         if self.canEncode(
             &Mode::KANJI,
-            self.stringToEncode.get(from).ok_or(Exceptions::format)?,
+            self.stringToEncode.get(from).ok_or(Exceptions::FORMAT)?,
         ) {
             self.addEdge(
                 edges,
@@ -356,7 +356,7 @@ impl MinimalEncoder {
                         self.encoders.clone(),
                         self.stringToEncode.clone(),
                     )
-                    .ok_or(Exceptions::writer)?,
+                    .ok_or(Exceptions::WRITER)?,
                 )),
             )?;
         }
@@ -366,7 +366,7 @@ impl MinimalEncoder {
             &Mode::ALPHANUMERIC,
             self.stringToEncode
                 .get(from)
-                .ok_or(Exceptions::indexOutOfBounds)?,
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
         ) {
             self.addEdge(
                 edges,
@@ -378,10 +378,10 @@ impl MinimalEncoder {
                         0,
                         if from + 1 >= inputLength
                             || !self.canEncode(
-                                &Mode::ALPHANUMERIC,
-                                self.stringToEncode
+                            &Mode::ALPHANUMERIC,
+                            self.stringToEncode
                                     .get(from + 1)
-                                    .ok_or(Exceptions::indexOutOfBounds)?,
+                                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                             )
                         {
                             1
@@ -393,7 +393,7 @@ impl MinimalEncoder {
                         self.encoders.clone(),
                         self.stringToEncode.clone(),
                     )
-                    .ok_or(Exceptions::writer)?,
+                    .ok_or(Exceptions::WRITER)?,
                 )),
             )?;
         }
@@ -402,7 +402,7 @@ impl MinimalEncoder {
             &Mode::NUMERIC,
             self.stringToEncode
                 .get(from)
-                .ok_or(Exceptions::indexOutOfBounds)?,
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
         ) {
             self.addEdge(
                 edges,
@@ -414,19 +414,19 @@ impl MinimalEncoder {
                         0,
                         if from + 1 >= inputLength
                             || !self.canEncode(
-                                &Mode::NUMERIC,
-                                self.stringToEncode
+                            &Mode::NUMERIC,
+                            self.stringToEncode
                                     .get(from + 1)
-                                    .ok_or(Exceptions::indexOutOfBounds)?,
+                                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                             )
                         {
                             1
                         } else if from + 2 >= inputLength
                             || !self.canEncode(
-                                &Mode::NUMERIC,
-                                self.stringToEncode
+                            &Mode::NUMERIC,
+                            self.stringToEncode
                                     .get(from + 2)
-                                    .ok_or(Exceptions::indexOutOfBounds)?,
+                                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?,
                             )
                         {
                             2
@@ -438,7 +438,7 @@ impl MinimalEncoder {
                         self.encoders.clone(),
                         self.stringToEncode.clone(),
                     )
-                    .ok_or(Exceptions::writer)?,
+                    .ok_or(Exceptions::WRITER)?,
                 )),
             )?;
         }
@@ -598,16 +598,16 @@ impl MinimalEncoder {
                 version,
                 edges[inputLength][minJ][minK]
                     .as_ref()
-                    .ok_or(Exceptions::writer)?
+                    .ok_or(Exceptions::WRITER)?
                     .clone(),
                 self.isGS1,
                 &self.ecLevel,
                 self.encoders.clone(),
                 self.stringToEncode.clone(),
             )
-            .ok_or(Exceptions::writer)?)
+            .ok_or(Exceptions::WRITER)?)
         } else {
-            Err(Exceptions::writerWith(format!(
+            Err(Exceptions::writer_with(format!(
                 r#"Internal error: failed to encode "{}"#,
                 self.stringToEncode
                     .iter()
@@ -1023,7 +1023,7 @@ impl RXingResultNode {
                 bits,
                 self.encoders
                     .getCharset(self.charsetEncoderIndex)
-                    .ok_or(Exceptions::writer)?,
+                    .ok_or(Exceptions::WRITER)?,
             )?;
         }
         Ok(())
diff --git a/src/qrcode/encoder/qrcode_encoder.rs b/src/qrcode/encoder/qrcode_encoder.rs
index 4c9aa01..82a7dfb 100644
--- a/src/qrcode/encoder/qrcode_encoder.rs
+++ b/src/qrcode/encoder/qrcode_encoder.rs
@@ -101,7 +101,7 @@ pub fn encode_with_hints(
     if has_encoding_hint {
         if let Some(EncodeHintValue::CharacterSet(v)) = hints.get(&EncodeHintType::CHARACTER_SET) {
             encoding =
-                Some(encoding::label::encoding_from_whatwg_label(v).ok_or(Exceptions::writer)?)
+                Some(encoding::label::encoding_from_whatwg_label(v).ok_or(Exceptions::WRITER)?)
         }
     }
 
@@ -179,7 +179,7 @@ pub fn encode_with_hints(
             version = Version::getVersionForNumber(versionNumber)?;
             let bitsNeeded = calculateBitsNeeded(mode, &header_bits, &data_bits, version);
             if !willFit(bitsNeeded, version, &ec_level) {
-                return Err(Exceptions::writerWith("Data too big for requested version"));
+                return Err(Exceptions::writer_with("Data too big for requested version"));
             }
         } else {
             version = recommendVersion(&ec_level, mode, &header_bits, &data_bits)?;
@@ -384,7 +384,7 @@ fn chooseVersion(numInputBits: u32, ecLevel: &ErrorCorrectionLevel) -> Result<Ve
             return Ok(version);
         }
     }
-    Err(Exceptions::writerWith(format!(
+    Err(Exceptions::writer_with(format!(
         "data too big {numInputBits}/{ecLevel:?}"
     )))
 }
@@ -412,7 +412,7 @@ pub fn willFit(numInputBits: u32, version: VersionRef, ecLevel: &ErrorCorrection
 pub fn terminateBits(num_data_bytes: u32, bits: &mut BitArray) -> Result<()> {
     let capacity = num_data_bytes * 8;
     if bits.getSize() > capacity as usize {
-        return Err(Exceptions::writerWith(format!(
+        return Err(Exceptions::writer_with(format!(
             "data bits cannot fit in the QR Code{capacity} > "
         )));
     }
@@ -440,7 +440,7 @@ pub fn terminateBits(num_data_bytes: u32, bits: &mut BitArray) -> Result<()> {
         bits.appendBits(if (i & 0x01) == 0 { 0xEC } else { 0x11 }, 8)?;
     }
     if bits.getSize() != capacity as usize {
-        return Err(Exceptions::writerWith("Bits size does not equal capacity"));
+        return Err(Exceptions::writer_with("Bits size does not equal capacity"));
     }
     Ok(())
 }
@@ -459,7 +459,7 @@ pub fn getNumDataBytesAndNumECBytesForBlockID(
     // numECBytesInBlock: &mut [u32],
 ) -> Result<(u32, u32)> {
     if block_id >= num_rsblocks {
-        return Err(Exceptions::writerWith("Block ID too large"));
+        return Err(Exceptions::writer_with("Block ID too large"));
     }
     // numRsBlocksInGroup2 = 196 % 5 = 1
     let num_rs_blocks_in_group2 = num_total_bytes % num_rsblocks;
@@ -480,18 +480,18 @@ pub fn getNumDataBytesAndNumECBytesForBlockID(
     // Sanity checks.
     // 26 = 26
     if num_ec_bytes_in_group1 != numEcBytesInGroup2 {
-        return Err(Exceptions::writerWith("EC bytes mismatch"));
+        return Err(Exceptions::writer_with("EC bytes mismatch"));
     }
     // 5 = 4 + 1.
     if num_rsblocks != num_rs_blocks_in_group1 + num_rs_blocks_in_group2 {
-        return Err(Exceptions::writerWith("RS blocks mismatch"));
+        return Err(Exceptions::writer_with("RS blocks mismatch"));
     }
     // 196 = (13 + 26) * 4 + (14 + 26) * 1
     if num_total_bytes
         != ((num_data_bytes_in_group1 + num_ec_bytes_in_group1) * num_rs_blocks_in_group1)
             + ((num_data_bytes_in_group2 + numEcBytesInGroup2) * num_rs_blocks_in_group2)
     {
-        return Err(Exceptions::writerWith("total bytes mismatch"));
+        return Err(Exceptions::writer_with("total bytes mismatch"));
     }
 
     Ok(if block_id < num_rs_blocks_in_group1 {
@@ -513,7 +513,7 @@ pub fn interleaveWithECBytes(
 ) -> Result<BitArray> {
     // "bits" must have "getNumDataBytes" bytes of data.
     if bits.getSizeInBytes() as u32 != num_data_bytes {
-        return Err(Exceptions::writerWith(
+        return Err(Exceptions::writer_with(
             "Number of bits and data bytes does not match",
         ));
     }
@@ -548,7 +548,7 @@ pub fn interleaveWithECBytes(
         data_bytes_offset += numDataBytesInBlock as usize;
     }
     if num_data_bytes != data_bytes_offset as u32 {
-        return Err(Exceptions::writerWith("Data bytes does not match offset"));
+        return Err(Exceptions::writer_with("Data bytes does not match offset"));
     }
 
     let mut result = BitArray::new();
@@ -573,7 +573,7 @@ pub fn interleaveWithECBytes(
     }
     if num_total_bytes != result.getSizeInBytes() as u32 {
         // Should be same.
-        return Err(Exceptions::writerWith(format!(
+        return Err(Exceptions::writer_with(format!(
             "Interleaving error: {} and {} differ.",
             num_total_bytes,
             result.getSizeInBytes()
@@ -620,7 +620,7 @@ pub fn appendLengthInfo(
 ) -> Result<()> {
     let numBits = mode.getCharacterCountBits(version);
     if num_letters >= (1 << numBits) {
-        return Err(Exceptions::writerWith(format!(
+        return Err(Exceptions::writer_with(format!(
             "{} is bigger than {}",
             num_letters,
             ((1 << numBits) - 1)
@@ -643,7 +643,7 @@ pub fn appendBytes(
         Mode::ALPHANUMERIC => appendAlphanumericBytes(content, bits),
         Mode::BYTE => append8BitBytes(content, bits, encoding),
         Mode::KANJI => appendKanjiBytes(content, bits),
-        _ => Err(Exceptions::writerWith(format!("Invalid mode: {mode:?}"))),
+        _ => Err(Exceptions::writer_with(format!("Invalid mode: {mode:?}"))),
     }
 }
 
@@ -651,18 +651,18 @@ pub fn appendNumericBytes(content: &str, bits: &mut BitArray) -> Result<()> {
     let length = content.len();
     let mut i = 0;
     while i < length {
-        let num1 = content.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)? as u8 - b'0';
+        let num1 = content.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u8 - b'0';
         if i + 2 < length {
             // Encode three numeric letters in ten bits.
             let num2 = content
                 .chars()
                 .nth(i + 1)
-                .ok_or(Exceptions::indexOutOfBounds)? as u8
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u8
                 - b'0';
             let num3 = content
                 .chars()
                 .nth(i + 2)
-                .ok_or(Exceptions::indexOutOfBounds)? as u8
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u8
                 - b'0';
             bits.appendBits(num1 as u32 * 100 + num2 as u32 * 10 + num3 as u32, 10)?;
             i += 3;
@@ -671,7 +671,7 @@ pub fn appendNumericBytes(content: &str, bits: &mut BitArray) -> Result<()> {
             let num2 = content
                 .chars()
                 .nth(i + 1)
-                .ok_or(Exceptions::indexOutOfBounds)? as u8
+                .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u8
                 - b'0';
             bits.appendBits(num1 as u32 * 10 + num2 as u32, 7)?;
             i += 2;
@@ -689,19 +689,19 @@ pub fn appendAlphanumericBytes(content: &str, bits: &mut BitArray) -> Result<()>
     let mut i = 0;
     while i < length {
         let code1 =
-            getAlphanumericCode(content.chars().nth(i).ok_or(Exceptions::indexOutOfBounds)? as u32);
+            getAlphanumericCode(content.chars().nth(i).ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u32);
         if code1 == -1 {
-            return Err(Exceptions::writer);
+            return Err(Exceptions::WRITER);
         }
         if i + 1 < length {
             let code2 = getAlphanumericCode(
                 content
                     .chars()
                     .nth(i + 1)
-                    .ok_or(Exceptions::indexOutOfBounds)? as u32,
+                    .ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)? as u32,
             );
             if code2 == -1 {
-                return Err(Exceptions::writer);
+                return Err(Exceptions::WRITER);
             }
             // Encode two alphanumeric letters in 11 bits.
             bits.appendBits((code1 as i16 * 45 + code2 as i16) as u32, 11)?;
@@ -718,7 +718,7 @@ pub fn appendAlphanumericBytes(content: &str, bits: &mut BitArray) -> Result<()>
 pub fn append8BitBytes(content: &str, bits: &mut BitArray, encoding: EncodingRef) -> Result<()> {
     let bytes = encoding
         .encode(content, encoding::EncoderTrap::Strict)
-        .map_err(|e| Exceptions::writerWith(format!("error {e}")))?;
+        .map_err(|e| Exceptions::writer_with(format!("error {e}")))?;
     for b in bytes {
         bits.appendBits(b as u32, 8)?;
     }
@@ -730,9 +730,9 @@ pub fn appendKanjiBytes(content: &str, bits: &mut BitArray) -> Result<()> {
 
     let bytes = sjis
         .encode(content, encoding::EncoderTrap::Strict)
-        .map_err(|e| Exceptions::writerWith(format!("error {e}")))?;
+        .map_err(|e| Exceptions::writer_with(format!("error {e}")))?;
     if bytes.len() % 2 != 0 {
-        return Err(Exceptions::writerWith("Kanji byte size not even"));
+        return Err(Exceptions::writer_with("Kanji byte size not even"));
     }
     let max_i = bytes.len() - 1; // bytes.length must be even
     let mut i = 0;
@@ -747,7 +747,7 @@ pub fn appendKanjiBytes(content: &str, bits: &mut BitArray) -> Result<()> {
             subtracted = code as i32 - 0xc140;
         }
         if subtracted == -1 {
-            return Err(Exceptions::writerWith("Invalid byte sequence"));
+            return Err(Exceptions::writer_with("Invalid byte sequence"));
         }
         let encoded = ((subtracted >> 8) * 0xc0) + (subtracted & 0xff);
         bits.appendBits(encoded as u32, 13)?;
diff --git a/src/qrcode/qr_code_reader.rs b/src/qrcode/qr_code_reader.rs
index b268518..c123b97 100644
--- a/src/qrcode/qr_code_reader.rs
+++ b/src/qrcode/qr_code_reader.rs
@@ -80,7 +80,7 @@ impl Reader for QRCodeReader {
                 // if (decoderRXingResult.getOther() instanceof QRCodeDecoderMetaData) {
                 other
                     .downcast_ref::<QRCodeDecoderMetaData>()
-                    .ok_or(Exceptions::illegalState)?
+                    .ok_or(Exceptions::ILLEGAL_STATE)?
                     .applyMirroredCorrection(&mut points);
             }
         }
@@ -150,11 +150,11 @@ impl QRCodeReader {
         let leftTopBlack = image.getTopLeftOnBit();
         let rightBottomBlack = image.getBottomRightOnBit();
         if leftTopBlack.is_none() || rightBottomBlack.is_none() {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
-        let leftTopBlack = leftTopBlack.ok_or(Exceptions::indexOutOfBounds)?;
-        let rightBottomBlack = rightBottomBlack.ok_or(Exceptions::indexOutOfBounds)?;
+        let leftTopBlack = leftTopBlack.ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
+        let rightBottomBlack = rightBottomBlack.ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?;
 
         let moduleSize = Self::moduleSize(&leftTopBlack, image)?;
 
@@ -165,7 +165,7 @@ impl QRCodeReader {
 
         // Sanity check!
         if left >= right || top >= bottom {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         if bottom - top != right - left {
@@ -174,17 +174,17 @@ impl QRCodeReader {
             right = left + (bottom - top);
             if right >= image.getWidth() as i32 {
                 // Abort if that would not make sense -- off image
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
         }
         let matrixWidth = ((right as f32 - left as f32 + 1.0) / moduleSize).round() as u32;
         let matrixHeight = ((bottom as f32 - top as f32 + 1.0) / moduleSize).round() as u32;
         if matrixWidth == 0 || matrixHeight == 0 {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         if matrixHeight != matrixWidth {
             // Only possibly decode square regions
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
 
         // Push in the "border" by half the module width so that we start
@@ -202,7 +202,7 @@ impl QRCodeReader {
         if nudgedTooFarRight > 0 {
             if nudgedTooFarRight > nudge as i32 {
                 // Neither way fits; abort
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             left -= nudgedTooFarRight;
         }
@@ -211,7 +211,7 @@ impl QRCodeReader {
         if nudgedTooFarDown > 0 {
             if nudgedTooFarDown > nudge as i32 {
                 // Neither way fits; abort
-                return Err(Exceptions::notFound);
+                return Err(Exceptions::NOT_FOUND);
             }
             top -= nudgedTooFarDown;
         }
@@ -248,7 +248,7 @@ impl QRCodeReader {
             y += 1;
         }
         if x == width || y == height {
-            return Err(Exceptions::notFound);
+            return Err(Exceptions::NOT_FOUND);
         }
         Ok((x - leftTopBlack[0]) as f32 / 7.0)
     }
diff --git a/src/qrcode/qr_code_writer.rs b/src/qrcode/qr_code_writer.rs
index 956bc63..5c3ea2f 100644
--- a/src/qrcode/qr_code_writer.rs
+++ b/src/qrcode/qr_code_writer.rs
@@ -59,18 +59,18 @@ impl Writer for QRCodeWriter {
         hints: &crate::EncodingHintDictionary,
     ) -> Result<crate::common::BitMatrix> {
         if contents.is_empty() {
-            return Err(Exceptions::illegalArgumentWith("found empty contents"));
+            return Err(Exceptions::illegal_argument_with("found empty contents"));
         }
 
         if format != &BarcodeFormat::QR_CODE {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "can only encode QR_CODE, but got {format:?}"
             )));
             // throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
         }
 
         if width < 0 || height < 0 {
-            return Err(Exceptions::illegalArgumentWith(format!(
+            return Err(Exceptions::illegal_argument_with(format!(
                 "requested dimensions are too small: {width}x{height}"
             )));
         }
@@ -87,7 +87,7 @@ impl Writer for QRCodeWriter {
             if let Some(EncodeHintValue::Margin(margin)) = hints.get(&EncodeHintType::MARGIN) {
                 margin
                     .parse::<i32>()
-                    .map_err(|e| Exceptions::parseWith(format!("could not parse {margin}: {e}")))?
+                    .map_err(|e| Exceptions::parse_with(format!("could not parse {margin}: {e}")))?
             } else {
                 QUIET_ZONE_SIZE
             };
@@ -109,10 +109,10 @@ impl QRCodeWriter {
     ) -> Result<BitMatrix> {
         let input = code.getMatrix();
         if input.is_none() {
-            return Err(Exceptions::illegalStateWith("matrix is empty"));
+            return Err(Exceptions::illegal_state_with("matrix is empty"));
         }
 
-        let input = input.as_ref().ok_or(Exceptions::illegalState)?;
+        let input = input.as_ref().ok_or(Exceptions::ILLEGAL_STATE)?;
 
         let inputWidth = input.getWidth() as i32;
         let inputHeight = input.getHeight() as i32;
diff --git a/src/rgb_luminance_source.rs b/src/rgb_luminance_source.rs
index 5f4be37..96747fe 100644
--- a/src/rgb_luminance_source.rs
+++ b/src/rgb_luminance_source.rs
@@ -128,7 +128,7 @@ impl LuminanceSource for RGBLuminanceSource {
             height,
         ) {
             Ok(crop) => Ok(Box::new(crop)),
-            Err(_error) => Err(Exceptions::unsupportedOperation),
+            Err(_error) => Err(Exceptions::UNSUPPORTED_OPERATION),
         }
     }
 
@@ -180,7 +180,7 @@ impl RGBLuminanceSource {
         height: usize,
     ) -> Result<Self> {
         if left + width > data_width || top + height > data_height {
-            return Err(Exceptions::illegalArgumentWith(
+            return Err(Exceptions::illegal_argument_with(
                 "Crop rectangle does not fit within image data.",
             ));
         }
diff --git a/src/svg_luminance_source.rs b/src/svg_luminance_source.rs
index 74762b2..ee62471 100644
--- a/src/svg_luminance_source.rs
+++ b/src/svg_luminance_source.rs
@@ -57,11 +57,11 @@ impl SVGLuminanceSource {
     pub fn new(svg_data: &[u8]) -> Result<Self> {
         // Load the SVG file
         let Ok(tree) = resvg::usvg::Tree::from_data(svg_data, &Options::default()) else {
-            return Err(Exceptions::formatWith(format!("could not parse svg data: {}", "err")));
+            return Err(Exceptions::format_with(format!("could not parse svg data: {}", "err")));
         };
 
         let Some(mut pixmap) = resvg::tiny_skia::Pixmap::new(tree.size.width() as u32, tree.size.height() as u32) else {
-            return Err(Exceptions::formatWith("could not create pixmap"));
+            return Err(Exceptions::format_with("could not create pixmap"));
         };
 
         resvg::render(
@@ -72,7 +72,7 @@ impl SVGLuminanceSource {
         );
 
         let Some(buffer) = RgbaImage::from_raw(tree.size.width() as u32, tree.size.height() as u32, pixmap.data().to_vec()) else {
-        return Err(Exceptions::formatWith("could not create image buffer"));
+        return Err(Exceptions::format_with("could not create image buffer"));
     };
 
         // let Ok(image) = image::load_from_memory_with_format(pixmap.data(), image::ImageFormat::Bmp)  else {