Code refactor and numeric support

src/decode_hints.rs

@@ -121,6 +121,12 @@ pub enum DecodeHintType {
      */
     #[cfg(feature = "allow_forced_iso_ied_18004_compliance")]
     QR_ASSUME_SPEC_CONFORM_INPUT,
+
+    /*
+     * Will translate the ASCII values parsed by the Telepen reader into the Telepen Numeric form.
+     */
+    TELEPEN_AS_NUMERIC,
+
     /*
      * Data type the hint is expecting.
      * Among the possible values the {@link Void} stands out as being used for
@@ -231,4 +237,9 @@ pub enum DecodeHintValue {
      */
     #[cfg(feature = "allow_forced_iso_ied_18004_compliance")]
     QrAssumeSpecConformInput(bool),
+
+    /**
+     * Translate the ASCII values parsed by the Telepen reader into the Telepen Numeric form; use {@link Boolean#TRUE}.
+     */
+    TelepenAsNumeric(bool),
 }

src/oned/telepen_common.rs

@@ -1,6 +1,7 @@
-pub struct TelepenCommon;
+pub mod TelepenCommon {
+    use crate::Exceptions;
+    use crate::common::Result;
 
-impl TelepenCommon {
     pub fn calculate_checksum(contents: &str) -> char {
         let mut sum = 0;
 
@@ -17,4 +18,49 @@ impl TelepenCommon {
             0 as char
         };
     }
+
+    pub fn ascii_to_numeric(contents: &str) -> String {
+        let mut number = String::new();
+
+        for i in 0 .. contents.len() {
+            let temp = contents.chars().nth(i).unwrap() as u32;
+
+            if temp >= 27 {
+                number.push_str(&(temp - 27).to_string());
+            }
+            else {
+                number.push_str(&(temp - 17).to_string());
+            }
+        }
+        
+        return number;
+    }
+
+    pub fn numeric_to_ascii(contents: &str) -> Result<String> {
+        if contents.len() % 2 != 0 {
+            return Err(Exceptions::illegal_argument_with("Input must contain an even number of characters."));
+        }
+
+        let mut ascii = String::new();
+        let mut i = 0;
+
+        while i < contents.len() {
+            let first = contents.chars().nth(i).unwrap() as u8;
+            let second = contents.chars().nth(i + 1).unwrap() as u8;
+
+            if second == 88 && first >= 48 && first <= 57 {
+                ascii.push((17 + first - 48) as char);
+            }
+            else if second >= 48 && second <= 57 && first >= 48 && first <= 57 {
+                ascii.push((27 + (first - 48) * 10 + (second - 48)) as char);
+            }
+            else {
+                return Err(Exceptions::illegal_argument_with(format!("Input contains an invalid character around position {}.", i.to_string())));
+            }
+
+            i += 2;
+        }
+
+        return Ok(ascii);
+    }
 }

src/oned/telepen_reader.rs

@@ -19,8 +19,9 @@ use rxing_one_d_proc_derive::OneDReader;
 use crate::common::{BitArray, Result};
 use crate::Exceptions;
 use crate::RXingResult;
+use crate::DecodeHintValue;
 use crate::{point_f, BarcodeFormat};
-use crate::oned::telepen_common::TelepenCommon;
+use crate::oned::TelepenCommon;
 use bit_reverse::ParallelReverse;
 
 use super::OneDReader;
@@ -51,7 +52,7 @@ impl OneDReader for TelepenReader {
         &mut self,
         rowNumber: u32,
         row: &crate::common::BitArray,
-        _hints: &crate::DecodingHintDictionary,
+        hints: &crate::DecodingHintDictionary,
     ) -> Result<crate::RXingResult> {
         self.counters.fill(0);
         self.setCounters(row, (row.get_size() as f32 * 0.001) as u32)?;
@@ -214,7 +215,7 @@ impl OneDReader for TelepenReader {
 
         // Content bytes
         let contentBytes = bytes[1 .. byteLength - 2].to_vec();
-        let contentString = String::from_utf8_lossy(&contentBytes);
+        let mut contentString = String::from_utf8_lossy(&contentBytes).to_string();
 
         // Penultimate byte is a block check character.
         let check = bytes[byteLength - 2];
@@ -226,6 +227,13 @@ impl OneDReader for TelepenReader {
             return Err(Exceptions::NOT_FOUND);
         }
 
+        if matches!(
+            hints.get(&DecodeHintType::TELEPEN_AS_NUMERIC),
+            Some(DecodeHintValue::TelepenAsNumeric(true))
+        ) {
+            contentString = TelepenCommon::ascii_to_numeric(&contentString);
+        }
+
         let mut runningCount = 0;
         runningCount += self.counters.iter().take(startOffset).sum::<u32>();
         let left: f32 = runningCount as f32;

src/oned/telepen_writer.rs

@@ -18,7 +18,7 @@ use rxing_one_d_proc_derive::OneDWriter;
 use regex::Regex;
 use crate::common::Result;
 use crate::BarcodeFormat;
-use crate::oned::telepen_common::TelepenCommon;
+use crate::oned::TelepenCommon;
 
 use super::OneDimensionalCodeWriter;
 
@@ -43,7 +43,7 @@ impl OneDimensionalCodeWriter for TelepenWriter {
 
         // Content
         for c in contents.chars() {
-            if c as u8 > 127 {
+            if c as u32 > 127 {
                 return Err(Exceptions::illegal_argument_with(format!(
                     "Telepen only supports ASCII characters."
                 )));
@@ -198,6 +198,12 @@ mod TelepenWriterTestCase {
 
     use super::TelepenWriter;
 
+    #[test]
+    #[should_panic]
+    fn testAsciiOnly() {
+        encode("АБВГДЕЁЖ");
+    }
+
     #[test]
     fn testEncode() {
         doTest(