summaryrefslogtreecommitdiff
path: root/xfa/src/fxbarcode/datamatrix/BC_EdifactEncoder.cpp
blob: a0a999fb9921d14e936af44d7ee2976eaab9a57f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// Original code is licensed as follows:
/*
 * 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.
 */

#include "xfa/src/fxbarcode/barcode.h"
#include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h"
#include "xfa/src/fxbarcode/BC_Dimension.h"
#include "BC_Encoder.h"
#include "BC_SymbolShapeHint.h"
#include "BC_SymbolInfo.h"
#include "BC_EncoderContext.h"
#include "BC_HighLevelEncoder.h"
#include "BC_EdifactEncoder.h"
CBC_EdifactEncoder::CBC_EdifactEncoder() {}
CBC_EdifactEncoder::~CBC_EdifactEncoder() {}
int32_t CBC_EdifactEncoder::getEncodingMode() {
  return EDIFACT_ENCODATION;
}
void CBC_EdifactEncoder::Encode(CBC_EncoderContext& context, int32_t& e) {
  CFX_WideString buffer;
  while (context.hasMoreCharacters()) {
    FX_WCHAR c = context.getCurrentChar();
    encodeChar(c, buffer, e);
    if (e != BCExceptionNO) {
      return;
    }
    context.m_pos++;
    int32_t count = buffer.GetLength();
    if (count >= 4) {
      context.writeCodewords(encodeToCodewords(buffer, 0, e));
      if (e != BCExceptionNO) {
        return;
      }
      buffer.Delete(0, 4);
      int32_t newMode = CBC_HighLevelEncoder::lookAheadTest(
          context.m_msg, context.m_pos, getEncodingMode());
      if (newMode != getEncodingMode()) {
        context.signalEncoderChange(ASCII_ENCODATION);
        break;
      }
    }
  }
  buffer += (FX_WCHAR)31;
  handleEOD(context, buffer, e);
}
void CBC_EdifactEncoder::handleEOD(CBC_EncoderContext& context,
                                   CFX_WideString buffer,
                                   int32_t& e) {
  int32_t count = buffer.GetLength();
  if (count == 0) {
    return;
  }
  if (count == 1) {
    context.updateSymbolInfo(e);
    if (e != BCExceptionNO) {
      return;
    }
    int32_t available =
        context.m_symbolInfo->m_dataCapacity - context.getCodewordCount();
    int32_t remaining = context.getRemainingCharacters();
    if (remaining == 0 && available <= 2) {
      return;
    }
  }
  if (count > 4) {
    e = BCExceptionIllegalStateCountMustNotExceed4;
    return;
  }
  int32_t restChars = count - 1;
  CFX_WideString encoded = encodeToCodewords(buffer, 0, e);
  if (e != BCExceptionNO) {
    return;
  }
  FX_BOOL endOfSymbolReached = !context.hasMoreCharacters();
  FX_BOOL restInAscii = endOfSymbolReached && restChars <= 2;
  if (restChars <= 2) {
    context.updateSymbolInfo(context.getCodewordCount() + restChars, e);
    if (e != BCExceptionNO) {
      return;
    }
    int32_t available =
        context.m_symbolInfo->m_dataCapacity - context.getCodewordCount();
    if (available >= 3) {
      restInAscii = FALSE;
      context.updateSymbolInfo(context.getCodewordCount() + encoded.GetLength(),
                               e);
      if (e != BCExceptionNO) {
        return;
      }
    }
  }
  if (restInAscii) {
    context.resetSymbolInfo();
    context.m_pos -= restChars;
  } else {
    context.writeCodewords(encoded);
  }
  context.signalEncoderChange(ASCII_ENCODATION);
}
void CBC_EdifactEncoder::encodeChar(FX_WCHAR c,
                                    CFX_WideString& sb,
                                    int32_t& e) {
  if (c >= ' ' && c <= '?') {
    sb += c;
  } else if (c >= '@' && c <= '^') {
    sb += (FX_WCHAR)(c - 64);
  } else {
    CBC_HighLevelEncoder::illegalCharacter(c, e);
  }
}
CFX_WideString CBC_EdifactEncoder::encodeToCodewords(CFX_WideString sb,
                                                     int32_t startPos,
                                                     int32_t& e) {
  int32_t len = sb.GetLength() - startPos;
  if (len == 0) {
    e = BCExceptionNoContents;
    return (FX_WCHAR*)"";
  }
  FX_WCHAR c1 = sb.GetAt(startPos);
  FX_WCHAR c2 = len >= 2 ? sb.GetAt(startPos + 1) : 0;
  FX_WCHAR c3 = len >= 3 ? sb.GetAt(startPos + 2) : 0;
  FX_WCHAR c4 = len >= 4 ? sb.GetAt(startPos + 3) : 0;
  int32_t v = (c1 << 18) + (c2 << 12) + (c3 << 6) + c4;
  FX_WCHAR cw1 = (FX_WCHAR)((v >> 16) & 255);
  FX_WCHAR cw2 = (FX_WCHAR)((v >> 8) & 255);
  FX_WCHAR cw3 = (FX_WCHAR)(v & 255);
  CFX_WideString res;
  res += cw1;
  if (len >= 2) {
    res += cw2;
  }
  if (len >= 3) {
    res += cw3;
  }
  return res;
}