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      1 // Copyright 2014 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 // Original code is licensed as follows:
      7 /*
      8  * Copyright 2006-2007 Jeremias Maerki.
      9  *
     10  * Licensed under the Apache License, Version 2.0 (the "License");
     11  * you may not use this file except in compliance with the License.
     12  * You may obtain a copy of the License at
     13  *
     14  *      http://www.apache.org/licenses/LICENSE-2.0
     15  *
     16  * Unless required by applicable law or agreed to in writing, software
     17  * distributed under the License is distributed on an "AS IS" BASIS,
     18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     19  * See the License for the specific language governing permissions and
     20  * limitations under the License.
     21  */
     22 
     23 #include "fxbarcode/datamatrix/BC_X12Encoder.h"
     24 
     25 #include "fxbarcode/common/BC_CommonBitMatrix.h"
     26 #include "fxbarcode/datamatrix/BC_C40Encoder.h"
     27 #include "fxbarcode/datamatrix/BC_Encoder.h"
     28 #include "fxbarcode/datamatrix/BC_EncoderContext.h"
     29 #include "fxbarcode/datamatrix/BC_HighLevelEncoder.h"
     30 #include "fxbarcode/datamatrix/BC_SymbolInfo.h"
     31 #include "fxbarcode/utils.h"
     32 
     33 CBC_X12Encoder::CBC_X12Encoder() {}
     34 CBC_X12Encoder::~CBC_X12Encoder() {}
     35 int32_t CBC_X12Encoder::getEncodingMode() {
     36   return X12_ENCODATION;
     37 }
     38 void CBC_X12Encoder::Encode(CBC_EncoderContext& context, int32_t& e) {
     39   WideString buffer;
     40   while (context.hasMoreCharacters()) {
     41     wchar_t c = context.getCurrentChar();
     42     context.m_pos++;
     43     encodeChar(c, buffer, e);
     44     if (e != BCExceptionNO) {
     45       return;
     46     }
     47     int32_t count = buffer.GetLength();
     48     if ((count % 3) == 0) {
     49       writeNextTriplet(context, buffer);
     50       int32_t newMode = CBC_HighLevelEncoder::lookAheadTest(
     51           context.m_msg, context.m_pos, getEncodingMode());
     52       if (newMode != getEncodingMode()) {
     53         context.signalEncoderChange(newMode);
     54         break;
     55       }
     56     }
     57   }
     58   handleEOD(context, buffer, e);
     59 }
     60 void CBC_X12Encoder::handleEOD(CBC_EncoderContext& context,
     61                                WideString& buffer,
     62                                int32_t& e) {
     63   context.updateSymbolInfo(e);
     64   if (e != BCExceptionNO) {
     65     return;
     66   }
     67   int32_t available =
     68       context.m_symbolInfo->dataCapacity() - context.getCodewordCount();
     69   int32_t count = buffer.GetLength();
     70   if (count == 2) {
     71     context.writeCodeword(CBC_HighLevelEncoder::X12_UNLATCH);
     72     context.m_pos -= 2;
     73     context.signalEncoderChange(ASCII_ENCODATION);
     74   } else if (count == 1) {
     75     context.m_pos--;
     76     if (available > 1) {
     77       context.writeCodeword(CBC_HighLevelEncoder::X12_UNLATCH);
     78     }
     79     context.signalEncoderChange(ASCII_ENCODATION);
     80   }
     81 }
     82 int32_t CBC_X12Encoder::encodeChar(wchar_t c, WideString& sb, int32_t& e) {
     83   if (c == '\r') {
     84     sb += (wchar_t)'\0';
     85   } else if (c == '*') {
     86     sb += (wchar_t)'\1';
     87   } else if (c == '>') {
     88     sb += (wchar_t)'\2';
     89   } else if (c == ' ') {
     90     sb += (wchar_t)'\3';
     91   } else if (c >= '0' && c <= '9') {
     92     sb += (wchar_t)(c - 48 + 4);
     93   } else if (c >= 'A' && c <= 'Z') {
     94     sb += (wchar_t)(c - 65 + 14);
     95   } else {
     96     e = BCExceptionIllegalArgument;
     97     return -1;
     98   }
     99   return 1;
    100 }
    101