diff options
Diffstat (limited to 'xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp')
| -rw-r--r-- | xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp | 493 |
1 files changed, 493 insertions, 0 deletions
diff --git a/xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp b/xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp new file mode 100644 index 0000000000..d52648c683 --- /dev/null +++ b/xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp @@ -0,0 +1,493 @@ +// 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 2009 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/pdf417/BC_PDF417DecodedBitStreamParser.h" + +#include <stdlib.h> + +#include "third_party/bigint/BigIntegerLibrary.hh" +#include "xfa/fxbarcode/BC_DecoderResult.h" +#include "xfa/fxbarcode/common/BC_CommonDecoderResult.h" +#include "xfa/fxbarcode/pdf417/BC_PDF417ResultMetadata.h" +#include "xfa/fxbarcode/utils.h" + +#define TEXT_COMPACTION_MODE_LATCH 900 +#define BYTE_COMPACTION_MODE_LATCH 901 +#define NUMERIC_COMPACTION_MODE_LATCH 902 +#define BYTE_COMPACTION_MODE_LATCH_6 924 +#define BEGIN_MACRO_PDF417_CONTROL_BLOCK 928 +#define BEGIN_MACRO_PDF417_OPTIONAL_FIELD 923 +#define MACRO_PDF417_TERMINATOR 922 +#define MODE_SHIFT_TO_BYTE_COMPACTION_MODE 913 + +int32_t CBC_DecodedBitStreamPaser::MAX_NUMERIC_CODEWORDS = 15; +int32_t CBC_DecodedBitStreamPaser::NUMBER_OF_SEQUENCE_CODEWORDS = 2; +int32_t CBC_DecodedBitStreamPaser::PL = 25; +int32_t CBC_DecodedBitStreamPaser::LL = 27; +int32_t CBC_DecodedBitStreamPaser::AS = 27; +int32_t CBC_DecodedBitStreamPaser::ML = 28; +int32_t CBC_DecodedBitStreamPaser::AL = 28; +int32_t CBC_DecodedBitStreamPaser::PS = 29; +int32_t CBC_DecodedBitStreamPaser::PAL = 29; +FX_CHAR CBC_DecodedBitStreamPaser::PUNCT_CHARS[29] = { + ';', '<', '>', '@', '[', '\\', '}', '_', '`', '~', + '!', '\r', '\t', ',', ':', '\n', '-', '.', '$', '/', + '"', '|', '*', '(', ')', '?', '{', '}', '\''}; +FX_CHAR CBC_DecodedBitStreamPaser::MIXED_CHARS[30] = { + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '&', '\r', '\t', + ',', ':', '#', '-', '.', '$', '/', '+', '%', '*', '=', '^'}; + +void CBC_DecodedBitStreamPaser::Initialize() {} +void CBC_DecodedBitStreamPaser::Finalize() {} +CBC_DecodedBitStreamPaser::CBC_DecodedBitStreamPaser() {} +CBC_DecodedBitStreamPaser::~CBC_DecodedBitStreamPaser() {} +CBC_CommonDecoderResult* CBC_DecodedBitStreamPaser::decode( + CFX_Int32Array& codewords, + CFX_ByteString ecLevel, + int32_t& e) { + CFX_ByteString result; + int32_t codeIndex = 1; + int32_t code = codewords.GetAt(codeIndex); + codeIndex++; + CBC_PDF417ResultMetadata* resultMetadata = new CBC_PDF417ResultMetadata; + while (codeIndex < codewords[0]) { + switch (code) { + case TEXT_COMPACTION_MODE_LATCH: + codeIndex = textCompaction(codewords, codeIndex, result); + break; + case BYTE_COMPACTION_MODE_LATCH: + codeIndex = byteCompaction(code, codewords, codeIndex, result); + break; + case NUMERIC_COMPACTION_MODE_LATCH: + codeIndex = numericCompaction(codewords, codeIndex, result, e); + BC_EXCEPTION_CHECK_ReturnValue(e, NULL); + break; + case MODE_SHIFT_TO_BYTE_COMPACTION_MODE: + codeIndex = byteCompaction(code, codewords, codeIndex, result); + break; + case BYTE_COMPACTION_MODE_LATCH_6: + codeIndex = byteCompaction(code, codewords, codeIndex, result); + break; + case BEGIN_MACRO_PDF417_CONTROL_BLOCK: + codeIndex = decodeMacroBlock(codewords, codeIndex, resultMetadata, e); + if (e != BCExceptionNO) { + delete resultMetadata; + return NULL; + } + break; + default: + codeIndex--; + codeIndex = textCompaction(codewords, codeIndex, result); + break; + } + if (codeIndex < codewords.GetSize()) { + code = codewords[codeIndex++]; + } else { + e = BCExceptionFormatInstance; + delete resultMetadata; + return NULL; + } + } + if (result.GetLength() == 0) { + e = BCExceptionFormatInstance; + delete resultMetadata; + return NULL; + } + CFX_ByteArray rawBytes; + CFX_PtrArray byteSegments; + CBC_CommonDecoderResult* tempCd = new CBC_CommonDecoderResult(); + tempCd->Init(rawBytes, result, byteSegments, ecLevel, e); + if (e != BCExceptionNO) { + delete resultMetadata; + return NULL; + } + tempCd->setOther(resultMetadata); + return tempCd; +} +int32_t CBC_DecodedBitStreamPaser::decodeMacroBlock( + CFX_Int32Array& codewords, + int32_t codeIndex, + CBC_PDF417ResultMetadata* resultMetadata, + int32_t& e) { + if (codeIndex + NUMBER_OF_SEQUENCE_CODEWORDS > codewords[0]) { + e = BCExceptionFormatInstance; + return -1; + } + CFX_Int32Array segmentIndexArray; + segmentIndexArray.SetSize(NUMBER_OF_SEQUENCE_CODEWORDS); + for (int32_t i = 0; i < NUMBER_OF_SEQUENCE_CODEWORDS; i++, codeIndex++) { + segmentIndexArray.SetAt(i, codewords[codeIndex]); + } + CFX_ByteString str = + decodeBase900toBase10(segmentIndexArray, NUMBER_OF_SEQUENCE_CODEWORDS, e); + BC_EXCEPTION_CHECK_ReturnValue(e, -1); + resultMetadata->setSegmentIndex(atoi(str.GetBuffer(str.GetLength()))); + CFX_ByteString fileId; + codeIndex = textCompaction(codewords, codeIndex, fileId); + resultMetadata->setFileId(fileId); + if (codewords[codeIndex] == BEGIN_MACRO_PDF417_OPTIONAL_FIELD) { + codeIndex++; + CFX_Int32Array additionalOptionCodeWords; + additionalOptionCodeWords.SetSize(codewords[0] - codeIndex); + int32_t additionalOptionCodeWordsIndex = 0; + FX_BOOL end = FALSE; + while ((codeIndex < codewords[0]) && !end) { + int32_t code = codewords[codeIndex++]; + if (code < TEXT_COMPACTION_MODE_LATCH) { + additionalOptionCodeWords[additionalOptionCodeWordsIndex++] = code; + } else { + switch (code) { + case MACRO_PDF417_TERMINATOR: + resultMetadata->setLastSegment(TRUE); + codeIndex++; + end = TRUE; + break; + default: + e = BCExceptionFormatInstance; + return -1; + } + } + } + CFX_Int32Array array; + array.SetSize(additionalOptionCodeWordsIndex); + array.Copy(additionalOptionCodeWords); + resultMetadata->setOptionalData(array); + } else if (codewords[codeIndex] == MACRO_PDF417_TERMINATOR) { + resultMetadata->setLastSegment(TRUE); + codeIndex++; + } + return codeIndex; +} +int32_t CBC_DecodedBitStreamPaser::textCompaction(CFX_Int32Array& codewords, + int32_t codeIndex, + CFX_ByteString& result) { + CFX_Int32Array textCompactionData; + textCompactionData.SetSize((codewords[0] - codeIndex) << 1); + CFX_Int32Array byteCompactionData; + byteCompactionData.SetSize((codewords[0] - codeIndex) << 1); + int32_t index = 0; + FX_BOOL end = FALSE; + while ((codeIndex < codewords[0]) && !end) { + int32_t code = codewords[codeIndex++]; + if (code < TEXT_COMPACTION_MODE_LATCH) { + textCompactionData[index] = code / 30; + textCompactionData[index + 1] = code % 30; + index += 2; + } else { + switch (code) { + case TEXT_COMPACTION_MODE_LATCH: + textCompactionData[index++] = TEXT_COMPACTION_MODE_LATCH; + break; + case BYTE_COMPACTION_MODE_LATCH: + codeIndex--; + end = TRUE; + break; + case NUMERIC_COMPACTION_MODE_LATCH: + codeIndex--; + end = TRUE; + break; + case BEGIN_MACRO_PDF417_CONTROL_BLOCK: + codeIndex--; + end = TRUE; + break; + case BEGIN_MACRO_PDF417_OPTIONAL_FIELD: + codeIndex--; + end = TRUE; + break; + case MACRO_PDF417_TERMINATOR: + codeIndex--; + end = TRUE; + break; + case MODE_SHIFT_TO_BYTE_COMPACTION_MODE: + textCompactionData[index] = MODE_SHIFT_TO_BYTE_COMPACTION_MODE; + code = codewords[codeIndex++]; + byteCompactionData[index] = code; + index++; + break; + case BYTE_COMPACTION_MODE_LATCH_6: + codeIndex--; + end = TRUE; + break; + } + } + } + decodeTextCompaction(textCompactionData, byteCompactionData, index, result); + return codeIndex; +} +void CBC_DecodedBitStreamPaser::decodeTextCompaction( + CFX_Int32Array& textCompactionData, + CFX_Int32Array& byteCompactionData, + int32_t length, + CFX_ByteString& result) { + Mode subMode = ALPHA; + Mode priorToShiftMode = ALPHA; + int32_t i = 0; + while (i < length) { + int32_t subModeCh = textCompactionData[i]; + FX_CHAR ch = 0; + switch (subMode) { + case ALPHA: + if (subModeCh < 26) { + ch = (FX_CHAR)('A' + subModeCh); + } else { + if (subModeCh == 26) { + ch = ' '; + } else if (subModeCh == LL) { + subMode = LOWER; + } else if (subModeCh == ML) { + subMode = MIXED; + } else if (subModeCh == PS) { + priorToShiftMode = subMode; + subMode = PUNCT_SHIFT; + } else if (subModeCh == MODE_SHIFT_TO_BYTE_COMPACTION_MODE) { + result += (FX_CHAR)byteCompactionData[i]; + } else if (subModeCh == TEXT_COMPACTION_MODE_LATCH) { + subMode = ALPHA; + } + } + break; + case LOWER: + if (subModeCh < 26) { + ch = (FX_CHAR)('a' + subModeCh); + } else { + if (subModeCh == 26) { + ch = ' '; + } else if (subModeCh == AS) { + priorToShiftMode = subMode; + subMode = ALPHA_SHIFT; + } else if (subModeCh == ML) { + subMode = MIXED; + } else if (subModeCh == PS) { + priorToShiftMode = subMode; + subMode = PUNCT_SHIFT; + } else if (subModeCh == MODE_SHIFT_TO_BYTE_COMPACTION_MODE) { + result += (FX_CHAR)byteCompactionData[i]; + } else if (subModeCh == TEXT_COMPACTION_MODE_LATCH) { + subMode = ALPHA; + } + } + break; + case MIXED: + if (subModeCh < PL) { + ch = MIXED_CHARS[subModeCh]; + } else { + if (subModeCh == PL) { + subMode = PUNCT; + } else if (subModeCh == 26) { + ch = ' '; + } else if (subModeCh == LL) { + subMode = LOWER; + } else if (subModeCh == AL) { + subMode = ALPHA; + } else if (subModeCh == PS) { + priorToShiftMode = subMode; + subMode = PUNCT_SHIFT; + } else if (subModeCh == MODE_SHIFT_TO_BYTE_COMPACTION_MODE) { + result += (FX_CHAR)byteCompactionData[i]; + } else if (subModeCh == TEXT_COMPACTION_MODE_LATCH) { + subMode = ALPHA; + } + } + break; + case PUNCT: + if (subModeCh < PAL) { + ch = PUNCT_CHARS[subModeCh]; + } else { + if (subModeCh == PAL) { + subMode = ALPHA; + } else if (subModeCh == MODE_SHIFT_TO_BYTE_COMPACTION_MODE) { + result += (FX_CHAR)byteCompactionData[i]; + } else if (subModeCh == TEXT_COMPACTION_MODE_LATCH) { + subMode = ALPHA; + } + } + break; + case ALPHA_SHIFT: + subMode = priorToShiftMode; + if (subModeCh < 26) { + ch = (FX_CHAR)('A' + subModeCh); + } else { + if (subModeCh == 26) { + ch = ' '; + } else if (subModeCh == TEXT_COMPACTION_MODE_LATCH) { + subMode = ALPHA; + } + } + break; + case PUNCT_SHIFT: + subMode = priorToShiftMode; + if (subModeCh < PAL) { + ch = PUNCT_CHARS[subModeCh]; + } else { + if (subModeCh == PAL) { + subMode = ALPHA; + } else if (subModeCh == MODE_SHIFT_TO_BYTE_COMPACTION_MODE) { + result += (FX_CHAR)byteCompactionData[i]; + } else if (subModeCh == TEXT_COMPACTION_MODE_LATCH) { + subMode = ALPHA; + } + } + break; + } + if (ch != 0) { + result += ch; + } + i++; + } +} +int32_t CBC_DecodedBitStreamPaser::byteCompaction(int32_t mode, + CFX_Int32Array& codewords, + int32_t codeIndex, + CFX_ByteString& result) { + if (mode == BYTE_COMPACTION_MODE_LATCH) { + int32_t count = 0; + int64_t value = 0; + FX_WORD* decodedData = FX_Alloc(FX_WORD, 6); + CFX_Int32Array byteCompactedCodewords; + byteCompactedCodewords.SetSize(6); + FX_BOOL end = FALSE; + int32_t nextCode = codewords[codeIndex++]; + while ((codeIndex < codewords[0]) && !end) { + byteCompactedCodewords[count++] = nextCode; + value = 900 * value + nextCode; + nextCode = codewords[codeIndex++]; + if (nextCode == TEXT_COMPACTION_MODE_LATCH || + nextCode == BYTE_COMPACTION_MODE_LATCH || + nextCode == NUMERIC_COMPACTION_MODE_LATCH || + nextCode == BYTE_COMPACTION_MODE_LATCH_6 || + nextCode == BEGIN_MACRO_PDF417_CONTROL_BLOCK || + nextCode == BEGIN_MACRO_PDF417_OPTIONAL_FIELD || + nextCode == MACRO_PDF417_TERMINATOR) { + codeIndex--; + end = TRUE; + } else { + if ((count % 5 == 0) && (count > 0)) { + int32_t j = 0; + for (; j < 6; ++j) { + decodedData[5 - j] = (FX_WORD)(value % 256); + value >>= 8; + } + for (j = 0; j < 6; ++j) { + result += (FX_CHAR)decodedData[j]; + } + count = 0; + } + } + } + FX_Free(decodedData); + if (codeIndex == codewords[0] && nextCode < TEXT_COMPACTION_MODE_LATCH) { + byteCompactedCodewords[count++] = nextCode; + } + for (int32_t i = 0; i < count; i++) { + result += (FX_CHAR)(FX_WORD)byteCompactedCodewords[i]; + } + } else if (mode == BYTE_COMPACTION_MODE_LATCH_6) { + int32_t count = 0; + int64_t value = 0; + FX_BOOL end = FALSE; + while (codeIndex < codewords[0] && !end) { + int32_t code = codewords[codeIndex++]; + if (code < TEXT_COMPACTION_MODE_LATCH) { + count++; + value = 900 * value + code; + } else { + if (code == TEXT_COMPACTION_MODE_LATCH || + code == BYTE_COMPACTION_MODE_LATCH || + code == NUMERIC_COMPACTION_MODE_LATCH || + code == BYTE_COMPACTION_MODE_LATCH_6 || + code == BEGIN_MACRO_PDF417_CONTROL_BLOCK || + code == BEGIN_MACRO_PDF417_OPTIONAL_FIELD || + code == MACRO_PDF417_TERMINATOR) { + codeIndex--; + end = TRUE; + } + } + if ((count % 5 == 0) && (count > 0)) { + FX_WORD* decodedData = FX_Alloc(FX_WORD, 6); + int32_t j = 0; + for (; j < 6; ++j) { + decodedData[5 - j] = (FX_WORD)(value & 0xFF); + value >>= 8; + } + for (j = 0; j < 6; ++j) { + result += (FX_CHAR)decodedData[j]; + } + count = 0; + FX_Free(decodedData); + } + } + } + return codeIndex; +} +int32_t CBC_DecodedBitStreamPaser::numericCompaction(CFX_Int32Array& codewords, + int32_t codeIndex, + CFX_ByteString& result, + int32_t& e) { + int32_t count = 0; + FX_BOOL end = FALSE; + CFX_Int32Array numericCodewords; + numericCodewords.SetSize(MAX_NUMERIC_CODEWORDS); + while (codeIndex < codewords[0] && !end) { + int32_t code = codewords[codeIndex++]; + if (codeIndex == codewords[0]) { + end = TRUE; + } + if (code < TEXT_COMPACTION_MODE_LATCH) { + numericCodewords[count] = code; + count++; + } else { + if (code == TEXT_COMPACTION_MODE_LATCH || + code == BYTE_COMPACTION_MODE_LATCH || + code == BYTE_COMPACTION_MODE_LATCH_6 || + code == BEGIN_MACRO_PDF417_CONTROL_BLOCK || + code == BEGIN_MACRO_PDF417_OPTIONAL_FIELD || + code == MACRO_PDF417_TERMINATOR) { + codeIndex--; + end = TRUE; + } + } + if (count % MAX_NUMERIC_CODEWORDS == 0 || + code == NUMERIC_COMPACTION_MODE_LATCH || end) { + CFX_ByteString s = decodeBase900toBase10(numericCodewords, count, e); + BC_EXCEPTION_CHECK_ReturnValue(e, -1); + result += s; + count = 0; + } + } + return codeIndex; +} +CFX_ByteString CBC_DecodedBitStreamPaser::decodeBase900toBase10( + CFX_Int32Array& codewords, + int32_t count, + int32_t& e) { + BigInteger result = 0; + BigInteger nineHundred(900); + for (int32_t i = 0; i < count; i++) { + result = result * nineHundred + BigInteger(codewords[i]); + } + CFX_ByteString resultString(bigIntegerToString(result).c_str()); + if (resultString.GetAt(0) != '1') { + e = BCExceptionFormatInstance; + return ' '; + } + return resultString.Mid(1, resultString.GetLength() - 1); +} |