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 2007 ZXing authors 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/BC_UtilCodingConvert.h" 25 #include "xfa/src/fxbarcode/common/BC_CommonBitSource.h" 26 #include "xfa/src/fxbarcode/common/BC_CommonECI.h" 27 #include "xfa/src/fxbarcode/common/BC_CommonCharacterSetECI.h" 28 #include "xfa/src/fxbarcode/common/BC_CommonDecoderResult.h" 29 #include "BC_QRCoderMode.h" 30 #include "BC_QRDecodedBitStreamParser.h" 31 const FX_CHAR* CBC_QRDecodedBitStreamParser::UTF_8 = "utf8"; 32 const FX_CHAR CBC_QRDecodedBitStreamParser::ALPHANUMERIC_CHARS[45] = { 33 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 34 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 35 'U', 'V', 'W', 'X', 'Y', 'Z', ' ', '$', '%', '*', '+', '-', '.', '/', ':'}; 36 CBC_QRDecodedBitStreamParser::CBC_QRDecodedBitStreamParser() {} 37 CBC_QRDecodedBitStreamParser::~CBC_QRDecodedBitStreamParser() {} 38 CBC_CommonDecoderResult* CBC_QRDecodedBitStreamParser::Decode( 39 CFX_ByteArray* bytes, 40 CBC_QRCoderVersion* version, 41 CBC_QRCoderErrorCorrectionLevel* ecLevel, 42 int32_t byteModeDecode, 43 int32_t& e) { 44 CBC_CommonBitSource bits(bytes); 45 CFX_ByteString result; 46 CBC_CommonCharacterSetECI* currentCharacterSetECI = NULL; 47 FX_BOOL fc1Infact = FALSE; 48 CFX_Int32Array byteSegments; 49 CBC_QRCoderMode* mode = NULL; 50 do { 51 if (bits.Available() < 4) { 52 mode = CBC_QRCoderMode::sTERMINATOR; 53 } else { 54 int32_t iTemp1 = bits.ReadBits(4, e); 55 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 56 mode = CBC_QRCoderMode::ForBits(iTemp1, e); 57 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 58 if (mode == NULL) { 59 e = BCExceptionUnSupportMode; 60 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 61 } 62 } 63 if (!(mode == CBC_QRCoderMode::sTERMINATOR)) { 64 if (mode == CBC_QRCoderMode::sFNC1_FIRST_POSITION || 65 mode == CBC_QRCoderMode::sFNC1_SECOND_POSITION) { 66 fc1Infact = TRUE; 67 } else if (mode == CBC_QRCoderMode::sSTRUCTURED_APPEND) { 68 bits.ReadBits(16, e); 69 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 70 } else if (mode == CBC_QRCoderMode::sECI) { 71 int32_t value = ParseECIValue(&bits, e); 72 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 73 currentCharacterSetECI = 74 CBC_CommonCharacterSetECI::GetCharacterSetECIByValue(value); 75 } else { 76 if (mode == CBC_QRCoderMode::sGBK) { 77 bits.ReadBits(4, e); 78 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 79 } 80 int32_t numBits = mode->GetCharacterCountBits(version, e); 81 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 82 int32_t count = bits.ReadBits(numBits, e); 83 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 84 if (mode == CBC_QRCoderMode::sNUMERIC) { 85 DecodeNumericSegment(&bits, result, count, e); 86 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 87 } else if (mode == CBC_QRCoderMode::sALPHANUMERIC) { 88 DecodeAlphanumericSegment(&bits, result, count, fc1Infact, e); 89 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 90 } else if (mode == CBC_QRCoderMode::sBYTE) { 91 DecodeByteSegment(&bits, result, count, currentCharacterSetECI, 92 &byteSegments, byteModeDecode, e); 93 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 94 } else if (mode == CBC_QRCoderMode::sGBK) { 95 DecodeGBKSegment(&bits, result, count, e); 96 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 97 } else if (mode == CBC_QRCoderMode::sKANJI) { 98 DecodeKanjiSegment(&bits, result, count, e); 99 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 100 } else { 101 e = BCExceptionUnSupportMode; 102 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 103 } 104 } 105 } 106 } while (!(mode == CBC_QRCoderMode::sTERMINATOR)); 107 CBC_CommonDecoderResult* tempCd = new CBC_CommonDecoderResult(); 108 tempCd->Init(*bytes, result, byteSegments, ecLevel, e); 109 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 110 return tempCd; 111 } 112 void CBC_QRDecodedBitStreamParser::DecodeGBKSegment(CBC_CommonBitSource* bits, 113 CFX_ByteString& result, 114 int32_t count, 115 int32_t& e) { 116 CFX_ByteString buffer; 117 while (count > 0) { 118 int32_t twoBytes = bits->ReadBits(13, e); 119 BC_EXCEPTION_CHECK_ReturnVoid(e); 120 int32_t assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060); 121 if (assembledTwoBytes <= 0x0095d) { 122 assembledTwoBytes += 0x0a1a1; 123 } else { 124 assembledTwoBytes += 0x0a6a1; 125 } 126 buffer += (uint8_t)(assembledTwoBytes >> 8); 127 buffer += (uint8_t)assembledTwoBytes; 128 count--; 129 } 130 CBC_UtilCodingConvert::LocaleToUtf8(buffer, result); 131 } 132 void CBC_QRDecodedBitStreamParser::DecodeKanjiSegment(CBC_CommonBitSource* bits, 133 CFX_ByteString& result, 134 int32_t count, 135 int32_t& e) { 136 CFX_ByteString buffer; 137 while (count > 0) { 138 int32_t twoBytes = bits->ReadBits(13, e); 139 BC_EXCEPTION_CHECK_ReturnVoid(e); 140 int32_t assembledTwoBytes = ((twoBytes / 0x0c0) << 8) | (twoBytes % 0x0c0); 141 if (assembledTwoBytes <= 0x01f00) { 142 assembledTwoBytes += 0x08140; 143 } else { 144 assembledTwoBytes += 0x0c140; 145 } 146 buffer += (uint8_t)(assembledTwoBytes >> 8); 147 buffer += (uint8_t)assembledTwoBytes; 148 count--; 149 } 150 CBC_UtilCodingConvert::LocaleToUtf8(buffer, result); 151 } 152 void CBC_QRDecodedBitStreamParser::DecodeByteSegment( 153 CBC_CommonBitSource* bits, 154 CFX_ByteString& result, 155 int32_t count, 156 CBC_CommonCharacterSetECI* currentCharacterSetECI, 157 CFX_Int32Array* byteSegments, 158 int32_t byteModeDecode, 159 int32_t& e) { 160 if (count < 0) { 161 e = BCExceptionNotFound; 162 BC_EXCEPTION_CHECK_ReturnVoid(e); 163 } 164 if ((count << 3) > bits->Available()) { 165 e = BCExceptionRead; 166 BC_EXCEPTION_CHECK_ReturnVoid(e); 167 } 168 uint8_t* readBytes = FX_Alloc(uint8_t, count); 169 FXSYS_memset(readBytes, 0x00, count); 170 for (int32_t i = 0; i < count; i++) { 171 readBytes[i] = (uint8_t)bits->ReadBits(8, e); 172 BC_EXCEPTION_CHECK_ReturnVoid(e); 173 } 174 CFX_ByteString bs(readBytes, count); 175 result += bs; 176 FX_Free(readBytes); 177 } 178 void CBC_QRDecodedBitStreamParser::DecodeAlphanumericSegment( 179 CBC_CommonBitSource* bits, 180 CFX_ByteString& result, 181 int32_t count, 182 FX_BOOL fac1InEffect, 183 int32_t& e) { 184 int32_t start = result.GetLength(); 185 while (count > 1) { 186 int32_t nextTwoCharsBits = bits->ReadBits(11, e); 187 BC_EXCEPTION_CHECK_ReturnVoid(e); 188 BC_FX_ByteString_Append(result, 1, 189 ALPHANUMERIC_CHARS[nextTwoCharsBits / 45]); 190 BC_FX_ByteString_Append(result, 1, 191 ALPHANUMERIC_CHARS[nextTwoCharsBits % 45]); 192 count -= 2; 193 } 194 if (count == 1) { 195 int32_t itemp = bits->ReadBits(6, e); 196 BC_EXCEPTION_CHECK_ReturnVoid(e); 197 BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[itemp]); 198 } 199 if (fac1InEffect) { 200 for (int32_t i = start; i < result.GetLength(); i++) { 201 if (result[i] == '%') { 202 if ((i < result.GetLength() - 1) && result[i + 1] == '%') { 203 result.Delete(i + 1, 1); 204 } else { 205 result.SetAt(i, (FX_CHAR)0x1d); 206 } 207 } 208 } 209 } 210 } 211 void CBC_QRDecodedBitStreamParser::DecodeNumericSegment( 212 CBC_CommonBitSource* bits, 213 CFX_ByteString& result, 214 int32_t count, 215 int32_t& e) { 216 while (count >= 3) { 217 int32_t threeDigitsBits = bits->ReadBits(10, e); 218 BC_EXCEPTION_CHECK_ReturnVoid(e); 219 if (threeDigitsBits >= 1000) { 220 e = BCExceptionRead; 221 BC_EXCEPTION_CHECK_ReturnVoid(e); 222 } 223 BC_FX_ByteString_Append(result, 1, 224 ALPHANUMERIC_CHARS[threeDigitsBits / 100]); 225 BC_FX_ByteString_Append(result, 1, 226 ALPHANUMERIC_CHARS[(threeDigitsBits / 10) % 10]); 227 BC_FX_ByteString_Append(result, 1, 228 ALPHANUMERIC_CHARS[threeDigitsBits % 10]); 229 count -= 3; 230 } 231 if (count == 2) { 232 int32_t twoDigitBits = bits->ReadBits(7, e); 233 BC_EXCEPTION_CHECK_ReturnVoid(e); 234 if (twoDigitBits >= 100) { 235 e = BCExceptionRead; 236 BC_EXCEPTION_CHECK_ReturnVoid(e); 237 } 238 BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[twoDigitBits / 10]); 239 BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[twoDigitBits % 10]); 240 } else if (count == 1) { 241 int32_t digitBits = bits->ReadBits(4, e); 242 BC_EXCEPTION_CHECK_ReturnVoid(e); 243 if (digitBits >= 10) { 244 e = BCExceptionRead; 245 BC_EXCEPTION_CHECK_ReturnVoid(e); 246 } 247 BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[digitBits]); 248 } 249 } 250 const CFX_ByteString CBC_QRDecodedBitStreamParser::GuessEncoding( 251 CFX_ByteArray* bytes) { 252 return *UTF_8; 253 } 254 int32_t CBC_QRDecodedBitStreamParser::ParseECIValue(CBC_CommonBitSource* bits, 255 int32_t& e) { 256 int32_t firstByte = bits->ReadBits(8, e); 257 BC_EXCEPTION_CHECK_ReturnValue(e, 0); 258 if ((firstByte & 0x80) == 0) { 259 return firstByte & 0x7f; 260 } else if ((firstByte & 0xc0) == 0x80) { 261 int32_t secondByte = bits->ReadBits(8, e); 262 BC_EXCEPTION_CHECK_ReturnValue(e, 0); 263 return ((firstByte & 0x3f) << 8) | secondByte; 264 } else if ((firstByte & 0xe0) == 0xc0) { 265 int32_t secondThirdByte = bits->ReadBits(16, e); 266 BC_EXCEPTION_CHECK_ReturnValue(e, 0); 267 return ((firstByte & 0x1f) << 16) | secondThirdByte; 268 } 269 e = BCExceptionBadECI; 270 BC_EXCEPTION_CHECK_ReturnValue(e, 0); 271 return 0; 272 } 273
