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 "xfa/src/fxbarcode/barcode.h"
24 #include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h"
25 #include "xfa/src/fxbarcode/BC_Dimension.h"
26 #include "BC_Encoder.h"
27 #include "BC_SymbolShapeHint.h"
28 #include "BC_SymbolInfo.h"
29 #include "BC_EncoderContext.h"
30 #include "BC_HighLevelEncoder.h"
31 #include "BC_EdifactEncoder.h"
CBC_EdifactEncoder()32 CBC_EdifactEncoder::CBC_EdifactEncoder() {}
~CBC_EdifactEncoder()33 CBC_EdifactEncoder::~CBC_EdifactEncoder() {}
getEncodingMode()34 int32_t CBC_EdifactEncoder::getEncodingMode() {
35 return EDIFACT_ENCODATION;
36 }
Encode(CBC_EncoderContext & context,int32_t & e)37 void CBC_EdifactEncoder::Encode(CBC_EncoderContext& context, int32_t& e) {
38 CFX_WideString buffer;
39 while (context.hasMoreCharacters()) {
40 FX_WCHAR c = context.getCurrentChar();
41 encodeChar(c, buffer, e);
42 if (e != BCExceptionNO) {
43 return;
44 }
45 context.m_pos++;
46 int32_t count = buffer.GetLength();
47 if (count >= 4) {
48 context.writeCodewords(encodeToCodewords(buffer, 0, e));
49 if (e != BCExceptionNO) {
50 return;
51 }
52 buffer.Delete(0, 4);
53 int32_t newMode = CBC_HighLevelEncoder::lookAheadTest(
54 context.m_msg, context.m_pos, getEncodingMode());
55 if (newMode != getEncodingMode()) {
56 context.signalEncoderChange(ASCII_ENCODATION);
57 break;
58 }
59 }
60 }
61 buffer += (FX_WCHAR)31;
62 handleEOD(context, buffer, e);
63 }
handleEOD(CBC_EncoderContext & context,CFX_WideString buffer,int32_t & e)64 void CBC_EdifactEncoder::handleEOD(CBC_EncoderContext& context,
65 CFX_WideString buffer,
66 int32_t& e) {
67 int32_t count = buffer.GetLength();
68 if (count == 0) {
69 return;
70 }
71 if (count == 1) {
72 context.updateSymbolInfo(e);
73 if (e != BCExceptionNO) {
74 return;
75 }
76 int32_t available =
77 context.m_symbolInfo->m_dataCapacity - context.getCodewordCount();
78 int32_t remaining = context.getRemainingCharacters();
79 if (remaining == 0 && available <= 2) {
80 return;
81 }
82 }
83 if (count > 4) {
84 e = BCExceptionIllegalStateCountMustNotExceed4;
85 return;
86 }
87 int32_t restChars = count - 1;
88 CFX_WideString encoded = encodeToCodewords(buffer, 0, e);
89 if (e != BCExceptionNO) {
90 return;
91 }
92 FX_BOOL endOfSymbolReached = !context.hasMoreCharacters();
93 FX_BOOL restInAscii = endOfSymbolReached && restChars <= 2;
94 if (restChars <= 2) {
95 context.updateSymbolInfo(context.getCodewordCount() + restChars, e);
96 if (e != BCExceptionNO) {
97 return;
98 }
99 int32_t available =
100 context.m_symbolInfo->m_dataCapacity - context.getCodewordCount();
101 if (available >= 3) {
102 restInAscii = FALSE;
103 context.updateSymbolInfo(context.getCodewordCount() + encoded.GetLength(),
104 e);
105 if (e != BCExceptionNO) {
106 return;
107 }
108 }
109 }
110 if (restInAscii) {
111 context.resetSymbolInfo();
112 context.m_pos -= restChars;
113 } else {
114 context.writeCodewords(encoded);
115 }
116 context.signalEncoderChange(ASCII_ENCODATION);
117 }
encodeChar(FX_WCHAR c,CFX_WideString & sb,int32_t & e)118 void CBC_EdifactEncoder::encodeChar(FX_WCHAR c,
119 CFX_WideString& sb,
120 int32_t& e) {
121 if (c >= ' ' && c <= '?') {
122 sb += c;
123 } else if (c >= '@' && c <= '^') {
124 sb += (FX_WCHAR)(c - 64);
125 } else {
126 CBC_HighLevelEncoder::illegalCharacter(c, e);
127 }
128 }
encodeToCodewords(CFX_WideString sb,int32_t startPos,int32_t & e)129 CFX_WideString CBC_EdifactEncoder::encodeToCodewords(CFX_WideString sb,
130 int32_t startPos,
131 int32_t& e) {
132 int32_t len = sb.GetLength() - startPos;
133 if (len == 0) {
134 e = BCExceptionNoContents;
135 return (FX_WCHAR*)"";
136 }
137 FX_WCHAR c1 = sb.GetAt(startPos);
138 FX_WCHAR c2 = len >= 2 ? sb.GetAt(startPos + 1) : 0;
139 FX_WCHAR c3 = len >= 3 ? sb.GetAt(startPos + 2) : 0;
140 FX_WCHAR c4 = len >= 4 ? sb.GetAt(startPos + 3) : 0;
141 int32_t v = (c1 << 18) + (c2 << 12) + (c3 << 6) + c4;
142 FX_WCHAR cw1 = (FX_WCHAR)((v >> 16) & 255);
143 FX_WCHAR cw2 = (FX_WCHAR)((v >> 8) & 255);
144 FX_WCHAR cw3 = (FX_WCHAR)(v & 255);
145 CFX_WideString res;
146 res += cw1;
147 if (len >= 2) {
148 res += cw2;
149 }
150 if (len >= 3) {
151 res += cw3;
152 }
153 return res;
154 }
155