// 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 "../barcode.h" | |
#include "../BC_UtilCodingConvert.h" | |
#include "../common/BC_CommonBitSource.h" | |
#include "../common/BC_CommonECI.h" | |
#include "../common/BC_CommonCharacterSetECI.h" | |
#include "../common/BC_CommonDecoderResult.h" | |
#include "BC_QRCoderMode.h" | |
#include "BC_QRDecodedBitStreamParser.h" | |
FX_LPCSTR 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, FX_INT32 byteModeDecode, FX_INT32 &e) | |
{ | |
CBC_CommonBitSource bits(bytes); | |
CFX_ByteString result; | |
CBC_CommonCharacterSetECI* currentCharacterSetECI = NULL; | |
FX_BOOL fc1Infact = FALSE; | |
CFX_Int32Array byteSegments; | |
CBC_QRCoderMode* mode = NULL; | |
do { | |
if(bits.Available() < 4) { | |
mode = CBC_QRCoderMode::sTERMINATOR; | |
} else { | |
FX_INT32 iTemp1 = bits.ReadBits(4, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
mode = CBC_QRCoderMode::ForBits(iTemp1, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
if(mode == NULL) { | |
e = BCExceptionUnSupportMode; | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} | |
} | |
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, NULL); | |
} else if(mode == CBC_QRCoderMode::sECI) { | |
FX_INT32 value = ParseECIValue(&bits, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
currentCharacterSetECI = CBC_CommonCharacterSetECI::GetCharacterSetECIByValue(value); | |
} else { | |
if(mode == CBC_QRCoderMode::sGBK) { | |
bits.ReadBits(4, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} | |
FX_INT32 numBits = mode->GetCharacterCountBits(version, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
FX_INT32 count = bits.ReadBits(numBits, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
if(mode == CBC_QRCoderMode::sNUMERIC) { | |
DecodeNumericSegment(&bits, result, count, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} else if(mode == CBC_QRCoderMode::sALPHANUMERIC) { | |
DecodeAlphanumericSegment(&bits, result, count, fc1Infact, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} else if(mode == CBC_QRCoderMode::sBYTE) { | |
DecodeByteSegment(&bits, result, count, currentCharacterSetECI, &byteSegments, byteModeDecode, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} else if(mode == CBC_QRCoderMode::sGBK) { | |
DecodeGBKSegment(&bits, result, count, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} else if(mode == CBC_QRCoderMode::sKANJI) { | |
DecodeKanjiSegment(&bits, result, count, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} else { | |
e = BCExceptionUnSupportMode; | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} | |
} | |
} | |
} while (!(mode == CBC_QRCoderMode::sTERMINATOR)); | |
CBC_CommonDecoderResult *tempCd = FX_NEW CBC_CommonDecoderResult(); | |
tempCd->Init(*bytes, result, byteSegments, ecLevel, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
return tempCd; | |
} | |
void CBC_QRDecodedBitStreamParser::DecodeGBKSegment(CBC_CommonBitSource* bits, CFX_ByteString &result, FX_INT32 count, FX_INT32 &e) | |
{ | |
CFX_ByteString buffer; | |
FX_INT32 offset = 0; | |
while (count > 0) { | |
FX_INT32 twoBytes = bits->ReadBits(13, e); | |
BC_EXCEPTION_CHECK_ReturnVoid(e); | |
FX_INT32 assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060); | |
if (assembledTwoBytes <= 0x0095d) { | |
assembledTwoBytes += 0x0a1a1; | |
} else { | |
assembledTwoBytes += 0x0a6a1; | |
} | |
buffer += (FX_BYTE) (assembledTwoBytes >> 8); | |
buffer += (FX_BYTE) assembledTwoBytes; | |
count--; | |
} | |
CBC_UtilCodingConvert::LocaleToUtf8(buffer, result); | |
} | |
void CBC_QRDecodedBitStreamParser::DecodeKanjiSegment(CBC_CommonBitSource* bits, CFX_ByteString &result, FX_INT32 count, FX_INT32 &e) | |
{ | |
CFX_ByteString buffer; | |
while (count > 0) { | |
FX_INT32 twoBytes = bits->ReadBits(13, e); | |
BC_EXCEPTION_CHECK_ReturnVoid(e); | |
FX_INT32 assembledTwoBytes = ((twoBytes / 0x0c0) << 8) | (twoBytes % 0x0c0); | |
if (assembledTwoBytes <= 0x01f00) { | |
assembledTwoBytes += 0x08140; | |
} else { | |
assembledTwoBytes += 0x0c140; | |
} | |
buffer += (FX_BYTE) (assembledTwoBytes >> 8); | |
buffer += (FX_BYTE) assembledTwoBytes; | |
count--; | |
} | |
CBC_UtilCodingConvert::LocaleToUtf8(buffer, result); | |
} | |
void CBC_QRDecodedBitStreamParser::DecodeByteSegment(CBC_CommonBitSource* bits, CFX_ByteString &result, FX_INT32 count, | |
CBC_CommonCharacterSetECI *currentCharacterSetECI, | |
CFX_Int32Array *byteSegments, FX_INT32 byteModeDecode, FX_INT32 &e) | |
{ | |
if(count < 0) { | |
e = BCExceptionNotFound; | |
BC_EXCEPTION_CHECK_ReturnVoid(e); | |
} | |
if((count << 3) > bits->Available()) { | |
e = BCExceptionRead; | |
BC_EXCEPTION_CHECK_ReturnVoid(e); | |
} | |
FX_BYTE *readBytes = FX_Alloc(FX_BYTE, count); | |
FXSYS_memset32(readBytes, 0x00, count); | |
for(FX_INT32 i = 0; i < count; i++) { | |
readBytes[i] = (FX_BYTE) 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, FX_INT32 count, FX_BOOL fac1InEffect, FX_INT32 &e) | |
{ | |
FX_INT32 start = result.GetLength(); | |
while(count > 1) { | |
FX_INT32 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) { | |
FX_INT32 itemp = bits->ReadBits(6, e); | |
BC_EXCEPTION_CHECK_ReturnVoid(e); | |
BC_FX_ByteString_Append(result, 1, ALPHANUMERIC_CHARS[itemp]); | |
} | |
if(fac1InEffect) { | |
for(FX_INT32 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, FX_INT32 count, FX_INT32 &e) | |
{ | |
while(count >= 3) { | |
FX_INT32 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) { | |
FX_INT32 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) { | |
FX_INT32 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; | |
} | |
FX_INT32 CBC_QRDecodedBitStreamParser::ParseECIValue(CBC_CommonBitSource* bits, FX_INT32 &e) | |
{ | |
FX_INT32 firstByte = bits->ReadBits(8, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
if((firstByte & 0x80) == 0) { | |
return firstByte & 0x7f; | |
} else if((firstByte & 0xc0) == 0x80) { | |
FX_INT32 secondByte = bits->ReadBits(8, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
return ((firstByte & 0x3f) << 8) | secondByte; | |
} else if((firstByte & 0xe0) == 0xc0) { | |
FX_INT32 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; | |
} |