| // 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 2007 ZXing authors |
| * |
| * 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/fxbarcode/BC_UtilCodingConvert.h" |
| #include "xfa/fxbarcode/common/BC_CommonBitSource.h" |
| #include "xfa/fxbarcode/common/BC_CommonCharacterSetECI.h" |
| #include "xfa/fxbarcode/common/BC_CommonDecoderResult.h" |
| #include "xfa/fxbarcode/common/BC_CommonECI.h" |
| #include "xfa/fxbarcode/qrcode/BC_QRCoderMode.h" |
| #include "xfa/fxbarcode/qrcode/BC_QRDecodedBitStreamParser.h" |
| |
| const FX_CHAR* CBC_QRDecodedBitStreamParser::UTF_8 = "utf8"; |
| const FX_CHAR CBC_QRDecodedBitStreamParser::ALPHANUMERIC_CHARS[45] = { |
| '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', |
| 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', |
| 'U', 'V', 'W', 'X', 'Y', 'Z', ' ', '$', '%', '*', '+', '-', '.', '/', ':'}; |
| |
| CBC_QRDecodedBitStreamParser::CBC_QRDecodedBitStreamParser() {} |
| CBC_QRDecodedBitStreamParser::~CBC_QRDecodedBitStreamParser() {} |
| CBC_CommonDecoderResult* CBC_QRDecodedBitStreamParser::Decode( |
| CFX_ByteArray* bytes, |
| CBC_QRCoderVersion* version, |
| CBC_QRCoderErrorCorrectionLevel* ecLevel, |
| int32_t byteModeDecode, |
| int32_t& e) { |
| CBC_CommonBitSource bits(bytes); |
| CFX_ByteString result; |
| CBC_CommonCharacterSetECI* currentCharacterSetECI = nullptr; |
| FX_BOOL fc1Infact = FALSE; |
| CFX_Int32Array byteSegments; |
| CBC_QRCoderMode* mode = nullptr; |
| do { |
| if (bits.Available() < 4) { |
| mode = CBC_QRCoderMode::sTERMINATOR; |
| } else { |
| int32_t iTemp1 = bits.ReadBits(4, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| mode = CBC_QRCoderMode::ForBits(iTemp1, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| if (!mode) { |
| e = BCExceptionUnSupportMode; |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } |
| } |
| if (!(mode == CBC_QRCoderMode::sTERMINATOR)) { |
| if (mode == CBC_QRCoderMode::sFNC1_FIRST_POSITION || |
| mode == CBC_QRCoderMode::sFNC1_SECOND_POSITION) { |
| fc1Infact = TRUE; |
| } else if (mode == CBC_QRCoderMode::sSTRUCTURED_APPEND) { |
| bits.ReadBits(16, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } else if (mode == CBC_QRCoderMode::sECI) { |
| int32_t value = ParseECIValue(&bits, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| currentCharacterSetECI = |
| CBC_CommonCharacterSetECI::GetCharacterSetECIByValue(value); |
| } else { |
| if (mode == CBC_QRCoderMode::sGBK) { |
| bits.ReadBits(4, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } |
| int32_t numBits = mode->GetCharacterCountBits(version, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| int32_t count = bits.ReadBits(numBits, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| if (mode == CBC_QRCoderMode::sNUMERIC) { |
| DecodeNumericSegment(&bits, result, count, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } else if (mode == CBC_QRCoderMode::sALPHANUMERIC) { |
| DecodeAlphanumericSegment(&bits, result, count, fc1Infact, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } else if (mode == CBC_QRCoderMode::sBYTE) { |
| DecodeByteSegment(&bits, result, count, currentCharacterSetECI, |
| &byteSegments, byteModeDecode, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } else if (mode == CBC_QRCoderMode::sGBK) { |
| DecodeGBKSegment(&bits, result, count, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } else if (mode == CBC_QRCoderMode::sKANJI) { |
| DecodeKanjiSegment(&bits, result, count, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } else { |
| e = BCExceptionUnSupportMode; |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| } |
| } |
| } |
| } while (!(mode == CBC_QRCoderMode::sTERMINATOR)); |
| CBC_CommonDecoderResult* tempCd = new CBC_CommonDecoderResult(); |
| tempCd->Init(*bytes, result, byteSegments, ecLevel, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| return tempCd; |
| } |
| void CBC_QRDecodedBitStreamParser::DecodeGBKSegment(CBC_CommonBitSource* bits, |
| CFX_ByteString& result, |
| int32_t count, |
| int32_t& e) { |
| CFX_ByteString buffer; |
| while (count > 0) { |
| int32_t twoBytes = bits->ReadBits(13, e); |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| int32_t assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060); |
| if (assembledTwoBytes <= 0x0095d) { |
| assembledTwoBytes += 0x0a1a1; |
| } else { |
| assembledTwoBytes += 0x0a6a1; |
| } |
| buffer += (uint8_t)(assembledTwoBytes >> 8); |
| buffer += (uint8_t)assembledTwoBytes; |
| count--; |
| } |
| CBC_UtilCodingConvert::LocaleToUtf8(buffer, result); |
| } |
| void CBC_QRDecodedBitStreamParser::DecodeKanjiSegment(CBC_CommonBitSource* bits, |
| CFX_ByteString& result, |
| int32_t count, |
| int32_t& e) { |
| CFX_ByteString buffer; |
| while (count > 0) { |
| int32_t twoBytes = bits->ReadBits(13, e); |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| int32_t assembledTwoBytes = ((twoBytes / 0x0c0) << 8) | (twoBytes % 0x0c0); |
| if (assembledTwoBytes <= 0x01f00) { |
| assembledTwoBytes += 0x08140; |
| } else { |
| assembledTwoBytes += 0x0c140; |
| } |
| buffer += (uint8_t)(assembledTwoBytes >> 8); |
| buffer += (uint8_t)assembledTwoBytes; |
| count--; |
| } |
| CBC_UtilCodingConvert::LocaleToUtf8(buffer, result); |
| } |
| void CBC_QRDecodedBitStreamParser::DecodeByteSegment( |
| CBC_CommonBitSource* bits, |
| CFX_ByteString& result, |
| int32_t count, |
| CBC_CommonCharacterSetECI* currentCharacterSetECI, |
| CFX_Int32Array* byteSegments, |
| int32_t byteModeDecode, |
| int32_t& e) { |
| if (count < 0) { |
| e = BCExceptionNotFound; |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| } |
| if ((count << 3) > bits->Available()) { |
| e = BCExceptionRead; |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| } |
| uint8_t* readBytes = FX_Alloc(uint8_t, count); |
| FXSYS_memset(readBytes, 0x00, count); |
| for (int32_t i = 0; i < count; i++) { |
| readBytes[i] = (uint8_t)bits->ReadBits(8, e); |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| } |
| CFX_ByteString bs(readBytes, count); |
| result += bs; |
| FX_Free(readBytes); |
| } |
| void CBC_QRDecodedBitStreamParser::DecodeAlphanumericSegment( |
| CBC_CommonBitSource* bits, |
| CFX_ByteString& result, |
| int32_t count, |
| FX_BOOL fac1InEffect, |
| int32_t& e) { |
| int32_t start = result.GetLength(); |
| while (count > 1) { |
| int32_t nextTwoCharsBits = bits->ReadBits(11, e); |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| BC_FX_ByteString_Append(result, 1, |
| ALPHANUMERIC_CHARS[nextTwoCharsBits / 45]); |
| BC_FX_ByteString_Append(result, 1, |
| ALPHANUMERIC_CHARS[nextTwoCharsBits % 45]); |
| count -= 2; |
| } |
| if (count == 1) { |
| int32_t itemp = bits->ReadBits(6, e); |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[itemp]); |
| } |
| if (fac1InEffect) { |
| for (int32_t i = start; i < result.GetLength(); i++) { |
| if (result[i] == '%') { |
| if ((i < result.GetLength() - 1) && result[i + 1] == '%') { |
| result.Delete(i + 1, 1); |
| } else { |
| result.SetAt(i, (FX_CHAR)0x1d); |
| } |
| } |
| } |
| } |
| } |
| void CBC_QRDecodedBitStreamParser::DecodeNumericSegment( |
| CBC_CommonBitSource* bits, |
| CFX_ByteString& result, |
| int32_t count, |
| int32_t& e) { |
| while (count >= 3) { |
| int32_t threeDigitsBits = bits->ReadBits(10, e); |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| if (threeDigitsBits >= 1000) { |
| e = BCExceptionRead; |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| } |
| BC_FX_ByteString_Append(result, 1, |
| ALPHANUMERIC_CHARS[threeDigitsBits / 100]); |
| BC_FX_ByteString_Append(result, 1, |
| ALPHANUMERIC_CHARS[(threeDigitsBits / 10) % 10]); |
| BC_FX_ByteString_Append(result, 1, |
| ALPHANUMERIC_CHARS[threeDigitsBits % 10]); |
| count -= 3; |
| } |
| if (count == 2) { |
| int32_t twoDigitBits = bits->ReadBits(7, e); |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| if (twoDigitBits >= 100) { |
| e = BCExceptionRead; |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| } |
| BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[twoDigitBits / 10]); |
| BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[twoDigitBits % 10]); |
| } else if (count == 1) { |
| int32_t digitBits = bits->ReadBits(4, e); |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| if (digitBits >= 10) { |
| e = BCExceptionRead; |
| BC_EXCEPTION_CHECK_ReturnVoid(e); |
| } |
| BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[digitBits]); |
| } |
| } |
| const CFX_ByteString CBC_QRDecodedBitStreamParser::GuessEncoding( |
| CFX_ByteArray* bytes) { |
| return *UTF_8; |
| } |
| int32_t CBC_QRDecodedBitStreamParser::ParseECIValue(CBC_CommonBitSource* bits, |
| int32_t& e) { |
| int32_t firstByte = bits->ReadBits(8, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, 0); |
| if ((firstByte & 0x80) == 0) { |
| return firstByte & 0x7f; |
| } else if ((firstByte & 0xc0) == 0x80) { |
| int32_t secondByte = bits->ReadBits(8, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, 0); |
| return ((firstByte & 0x3f) << 8) | secondByte; |
| } else if ((firstByte & 0xe0) == 0xc0) { |
| int32_t secondThirdByte = bits->ReadBits(16, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, 0); |
| return ((firstByte & 0x1f) << 16) | secondThirdByte; |
| } |
| e = BCExceptionBadECI; |
| BC_EXCEPTION_CHECK_ReturnValue(e, 0); |
| return 0; |
| } |
