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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 "barcode.h" | |
| 24 #include "include/BC_Encoder.h" | |
| 25 #include "include/BC_CommonBitMatrix.h" | |
| 26 #include "include/BC_Dimension.h" | |
| 27 #include "include/BC_SymbolShapeHint.h" | |
| 28 #include "include/BC_SymbolInfo.h" | |
| 29 #include "include/BC_EncoderContext.h" | |
| 30 #include "include/BC_HighLevelEncoder.h" | |
| 31 #include "include/BC_EdifactEncoder.h" | |
| 32 CBC_EdifactEncoder::CBC_EdifactEncoder() | |
| 33 { | |
| 34 } | |
| 35 CBC_EdifactEncoder::~CBC_EdifactEncoder() | |
| 36 { | |
| 37 } | |
| 38 FX_INT32 CBC_EdifactEncoder::getEncodingMode() | |
| 39 { | |
| 40 return EDIFACT_ENCODATION; | |
| 41 } | |
| 42 void CBC_EdifactEncoder::Encode(CBC_EncoderContext &context, FX_INT32 &e) | |
| 43 { | |
| 44 CFX_WideString buffer; | |
| 45 while (context.hasMoreCharacters()) { | |
| 46 FX_WCHAR c = context.getCurrentChar(); | |
| 47 encodeChar(c, buffer, e); | |
| 48 if (e != BCExceptionNO) { | |
| 49 return; | |
| 50 } | |
| 51 context.m_pos++; | |
| 52 FX_INT32 count = buffer.GetLength(); | |
| 53 if (count >= 4) { | |
| 54 context.writeCodewords(encodeToCodewords(buffer, 0, e)); | |
| 55 if (e != BCExceptionNO) { | |
| 56 return; | |
| 57 } | |
| 58 buffer.Delete(0, 4); | |
| 59 FX_INT32 newMode = CBC_HighLevelEncoder::lookAheadTest(context.m_msg
, context.m_pos, getEncodingMode()); | |
| 60 if (newMode != getEncodingMode()) { | |
| 61 context.signalEncoderChange(ASCII_ENCODATION); | |
| 62 break; | |
| 63 } | |
| 64 } | |
| 65 } | |
| 66 buffer += (FX_WCHAR)31; | |
| 67 handleEOD(context, buffer, e); | |
| 68 } | |
| 69 void CBC_EdifactEncoder::handleEOD(CBC_EncoderContext &context, CFX_WideString b
uffer, FX_INT32 &e) | |
| 70 { | |
| 71 FX_INT32 count = buffer.GetLength(); | |
| 72 if (count == 0) { | |
| 73 return; | |
| 74 } | |
| 75 if (count == 1) { | |
| 76 context.updateSymbolInfo(e); | |
| 77 if (e != BCExceptionNO) { | |
| 78 return; | |
| 79 } | |
| 80 FX_INT32 available = context.m_symbolInfo->m_dataCapacity - context.getC
odewordCount(); | |
| 81 FX_INT32 remaining = context.getRemainingCharacters(); | |
| 82 if (remaining == 0 && available <= 2) { | |
| 83 return; | |
| 84 } | |
| 85 } | |
| 86 if (count > 4) { | |
| 87 e = BCExceptionIllegalStateCountMustNotExceed4; | |
| 88 return; | |
| 89 } | |
| 90 FX_INT32 restChars = count - 1; | |
| 91 CFX_WideString encoded = encodeToCodewords(buffer, 0, e); | |
| 92 if (e != BCExceptionNO) { | |
| 93 return; | |
| 94 } | |
| 95 FX_BOOL endOfSymbolReached = !context.hasMoreCharacters(); | |
| 96 FX_BOOL restInAscii = endOfSymbolReached && restChars <= 2; | |
| 97 if (restChars <= 2) { | |
| 98 context.updateSymbolInfo(context.getCodewordCount() + restChars, e); | |
| 99 if (e != BCExceptionNO) { | |
| 100 return; | |
| 101 } | |
| 102 FX_INT32 available = context.m_symbolInfo->m_dataCapacity - context.getC
odewordCount(); | |
| 103 if (available >= 3) { | |
| 104 restInAscii = FALSE; | |
| 105 context.updateSymbolInfo(context.getCodewordCount() + encoded.GetLen
gth(), e); | |
| 106 if (e != BCExceptionNO) { | |
| 107 return; | |
| 108 } | |
| 109 } | |
| 110 } | |
| 111 if (restInAscii) { | |
| 112 context.resetSymbolInfo(); | |
| 113 context.m_pos -= restChars; | |
| 114 } else { | |
| 115 context.writeCodewords(encoded); | |
| 116 } | |
| 117 context.signalEncoderChange(ASCII_ENCODATION); | |
| 118 } | |
| 119 void CBC_EdifactEncoder::encodeChar(FX_WCHAR c, CFX_WideString &sb, FX_INT32 &e) | |
| 120 { | |
| 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 } | |
| 129 CFX_WideString CBC_EdifactEncoder::encodeToCodewords(CFX_WideString sb, FX_INT32
startPos, FX_INT32 &e) | |
| 130 { | |
| 131 FX_INT32 len = sb.GetLength() - startPos; | |
| 132 if (len == 0) { | |
| 133 e = BCExceptionNoContents; | |
| 134 return (FX_LPWSTR)""; | |
| 135 } | |
| 136 FX_WCHAR c1 = sb.GetAt(startPos); | |
| 137 FX_WCHAR c2 = len >= 2 ? sb.GetAt(startPos + 1) : 0; | |
| 138 FX_WCHAR c3 = len >= 3 ? sb.GetAt(startPos + 2) : 0; | |
| 139 FX_WCHAR c4 = len >= 4 ? sb.GetAt(startPos + 3) : 0; | |
| 140 FX_INT32 v = (c1 << 18) + (c2 << 12) + (c3 << 6) + c4; | |
| 141 FX_WCHAR cw1 = (FX_WCHAR) ((v >> 16) & 255); | |
| 142 FX_WCHAR cw2 = (FX_WCHAR) ((v >> 8) & 255); | |
| 143 FX_WCHAR cw3 = (FX_WCHAR) (v & 255); | |
| 144 CFX_WideString res; | |
| 145 res += cw1; | |
| 146 if (len >= 2) { | |
| 147 res += cw2; | |
| 148 } | |
| 149 if (len >= 3) { | |
| 150 res += cw3; | |
| 151 } | |
| 152 return res; | |
| 153 } | |
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Chromium Code Reviews
Issue 842043002:
Organize barcode codes into modules. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@xfa