porting encoders

2026-07-26 12:22:34 +00:00 · 2022-10-27 15:37:43 -05:00
parent 55f95540f9
commit 12d52b6b1b
11 changed files with 1080 additions and 876 deletions
--- a/src/datamatrix/encoder/ascii_encoder.rs
+++ b/src/datamatrix/encoder/ascii_encoder.rs
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2006-2007 Jeremias Maerki.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use crate::Exceptions;
+
+use super::{high_level_encoder, Encoder};
+
+pub struct ASCIIEncoder;
+
+impl Encoder for ASCIIEncoder {
+    fn encode(&self, context: &mut super::EncoderContext) -> Result<(), Exceptions> {
+        //step B
+        let n =
+            high_level_encoder::determineConsecutiveDigitCount(context.getMessage(), context.pos);
+        if n >= 2 {
+            context.writeCodeword(Self::encodeASCIIDigits(
+                context
+                    .getMessage()
+                    .chars()
+                    .nth(context.pos as usize)
+                    .unwrap(),
+                context
+                    .getMessage()
+                    .chars()
+                    .nth(context.pos as usize + 1)
+                    .unwrap(),
+            )? as u8);
+            context.pos += 2;
+        } else {
+            let c = context.getCurrentChar();
+            let newMode = high_level_encoder::lookAheadTest(
+                context.getMessage(),
+                context.pos,
+                self.getEncodingMode() as u32,
+            );
+            if newMode != self.getEncodingMode() {
+                match newMode {
+                    high_level_encoder::BASE256_ENCODATION => {
+                        context.writeCodeword(high_level_encoder::LATCH_TO_BASE256);
+                        context.signalEncoderChange(high_level_encoder::BASE256_ENCODATION);
+                        return Ok(());
+                    }
+                    high_level_encoder::C40_ENCODATION => {
+                        context.writeCodeword(high_level_encoder::LATCH_TO_C40);
+                        context.signalEncoderChange(high_level_encoder::C40_ENCODATION);
+                        return Ok(());
+                    }
+                    high_level_encoder::X12_ENCODATION => {
+                        context.writeCodeword(high_level_encoder::LATCH_TO_ANSIX12);
+                        context.signalEncoderChange(high_level_encoder::X12_ENCODATION);
+                    }
+                    high_level_encoder::TEXT_ENCODATION => {
+                        context.writeCodeword(high_level_encoder::LATCH_TO_TEXT);
+                        context.signalEncoderChange(high_level_encoder::TEXT_ENCODATION);
+                    }
+
+                    high_level_encoder::EDIFACT_ENCODATION => {
+                        context.writeCodeword(high_level_encoder::LATCH_TO_EDIFACT);
+                        context.signalEncoderChange(high_level_encoder::EDIFACT_ENCODATION);
+                    }
+
+                    _ => {
+                        return Err(Exceptions::IllegalStateException(format!(
+                            "Illegal mode: {}",
+                            newMode
+                        )));
+                    }
+                }
+            } else if high_level_encoder::isExtendedASCII(c) {
+                context.writeCodeword(high_level_encoder::UPPER_SHIFT);
+                context.writeCodeword(c as u8 - 128 + 1);
+                context.pos += 1;
+            } else {
+                context.writeCodeword(c as u8 + 1);
+                context.pos += 1;
+            }
+        }
+        Ok(())
+    }
+
+    fn getEncodingMode(&self) -> usize {
+        high_level_encoder::ASCII_ENCODATION
+    }
+}
+
+impl ASCIIEncoder {
+    pub fn new() -> Self {
+        Self
+    }
+    fn encodeASCIIDigits(digit1: char, digit2: char) -> Result<char, Exceptions> {
+        if high_level_encoder::isDigit(digit1) && high_level_encoder::isDigit(digit2) {
+            let num = (digit1 as u8 - 48) * 10 + (digit2 as u8 - 48);
+            Ok((num + 130) as char)
+        } else {
+            Err(Exceptions::IllegalArgumentException(format!(
+                "not digits: {}{}",
+                digit1, digit2
+            )))
+        }
+    }
+}