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// 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, int32_t byteModeDecode, int32_t &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 {
int32_t 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) {
int32_t 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);
}
int32_t numBits = mode->GetCharacterCountBits(version, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
int32_t 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, int32_t count, int32_t &e)
{
CFX_ByteString buffer;
int32_t offset = 0;
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_memset32(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;
}
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