diff options
Diffstat (limited to 'xfa/src/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp')
| -rw-r--r-- | xfa/src/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp | 485 |
1 files changed, 485 insertions, 0 deletions
diff --git a/xfa/src/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp b/xfa/src/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp new file mode 100644 index 0000000000..ae26057c3e --- /dev/null +++ b/xfa/src/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.cpp @@ -0,0 +1,485 @@ +// 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 <stdlib.h>
+#include "../barcode.h"
+#include "../BC_DecoderResult.h"
+#include "../common/BC_CommonDecoderResult.h"
+#include "../../../../third_party/bigint/BigIntegerLibrary.hh"
+#include "BC_PDF417ResultMetadata.h"
+#include "BC_PDF417DecodedBitStreamParser.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
+
+FX_INT32 CBC_DecodedBitStreamPaser::MAX_NUMERIC_CODEWORDS = 15;
+FX_INT32 CBC_DecodedBitStreamPaser::NUMBER_OF_SEQUENCE_CODEWORDS = 2;
+FX_INT32 CBC_DecodedBitStreamPaser::PL = 25;
+FX_INT32 CBC_DecodedBitStreamPaser::LL = 27;
+FX_INT32 CBC_DecodedBitStreamPaser::AS = 27;
+FX_INT32 CBC_DecodedBitStreamPaser::ML = 28;
+FX_INT32 CBC_DecodedBitStreamPaser::AL = 28;
+FX_INT32 CBC_DecodedBitStreamPaser::PS = 29;
+FX_INT32 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, FX_INT32 &e)
+{
+ CFX_ByteString result;
+ FX_INT32 codeIndex = 1;
+ FX_INT32 code = codewords.GetAt(codeIndex);
+ codeIndex++;
+ CBC_PDF417ResultMetadata* resultMetadata = FX_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 = FX_NEW CBC_CommonDecoderResult();
+ tempCd->Init(rawBytes, result, byteSegments, ecLevel, e);
+ if (e != BCExceptionNO) {
+ delete resultMetadata;
+ return NULL;
+ }
+ tempCd->setOther(resultMetadata);
+ return tempCd;
+}
+FX_INT32 CBC_DecodedBitStreamPaser::decodeMacroBlock(CFX_Int32Array &codewords, FX_INT32 codeIndex, CBC_PDF417ResultMetadata* resultMetadata, FX_INT32 &e)
+{
+ if (codeIndex + NUMBER_OF_SEQUENCE_CODEWORDS > codewords[0]) {
+ e = BCExceptionFormatInstance;
+ return -1;
+ }
+ CFX_Int32Array segmentIndexArray;
+ segmentIndexArray.SetSize(NUMBER_OF_SEQUENCE_CODEWORDS);
+ for (FX_INT32 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);
+ FX_INT32 additionalOptionCodeWordsIndex = 0;
+ FX_BOOL end = FALSE;
+ while ((codeIndex < codewords[0]) && !end) {
+ FX_INT32 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;
+}
+FX_INT32 CBC_DecodedBitStreamPaser::textCompaction(CFX_Int32Array &codewords, FX_INT32 codeIndex, CFX_ByteString &result)
+{
+ CFX_Int32Array textCompactionData;
+ textCompactionData.SetSize((codewords[0] - codeIndex) << 1);
+ CFX_Int32Array byteCompactionData;
+ byteCompactionData.SetSize((codewords[0] - codeIndex) << 1);
+ FX_INT32 index = 0;
+ FX_BOOL end = FALSE;
+ while ((codeIndex < codewords[0]) && !end) {
+ FX_INT32 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, FX_INT32 length, CFX_ByteString &result)
+{
+ Mode subMode = ALPHA;
+ Mode priorToShiftMode = ALPHA;
+ FX_INT32 i = 0;
+ while (i < length) {
+ FX_INT32 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++;
+ }
+}
+FX_INT32 CBC_DecodedBitStreamPaser::byteCompaction(FX_INT32 mode, CFX_Int32Array &codewords, FX_INT32 codeIndex, CFX_ByteString &result)
+{
+ if (mode == BYTE_COMPACTION_MODE_LATCH) {
+ FX_INT32 count = 0;
+ FX_INT64 value = 0;
+ FX_WORD* decodedData = FX_Alloc(FX_WORD, 6 * sizeof(FX_WORD));
+ CFX_Int32Array byteCompactedCodewords;
+ byteCompactedCodewords.SetSize(6);
+ FX_BOOL end = FALSE;
+ FX_INT32 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)) {
+ FX_INT32 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 (FX_INT32 i = 0; i < count; i++) {
+ result += (FX_CHAR)(FX_WORD) byteCompactedCodewords[i];
+ }
+ } else if (mode == BYTE_COMPACTION_MODE_LATCH_6) {
+ FX_INT32 count = 0;
+ FX_INT64 value = 0;
+ FX_BOOL end = FALSE;
+ while (codeIndex < codewords[0] && !end) {
+ FX_INT32 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 * sizeof(FX_WORD));
+ FX_INT32 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;
+}
+FX_INT32 CBC_DecodedBitStreamPaser::numericCompaction(CFX_Int32Array &codewords, FX_INT32 codeIndex, CFX_ByteString &result, FX_INT32 &e)
+{
+ FX_INT32 count = 0;
+ FX_BOOL end = FALSE;
+ CFX_Int32Array numericCodewords;
+ numericCodewords.SetSize(MAX_NUMERIC_CODEWORDS);
+ while (codeIndex < codewords[0] && !end) {
+ FX_INT32 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, FX_INT32 count, FX_INT32 &e)
+{
+ BigInteger result = 0;
+ BigInteger nineHundred(900);
+ for (FX_INT32 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);
+}
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