diff options
Diffstat (limited to 'xfa/fxbarcode/oned/BC_OnedCode39Reader.cpp')
| -rw-r--r-- | xfa/fxbarcode/oned/BC_OnedCode39Reader.cpp | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/xfa/fxbarcode/oned/BC_OnedCode39Reader.cpp b/xfa/fxbarcode/oned/BC_OnedCode39Reader.cpp new file mode 100644 index 0000000000..e2f88e7a79 --- /dev/null +++ b/xfa/fxbarcode/oned/BC_OnedCode39Reader.cpp @@ -0,0 +1,287 @@ +// 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 2008 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 <algorithm> + +#include "xfa/fxbarcode/BC_Reader.h" +#include "xfa/fxbarcode/common/BC_CommonBitArray.h" +#include "xfa/fxbarcode/oned/BC_OneDReader.h" +#include "xfa/fxbarcode/oned/BC_OnedCode39Reader.h" +#include "xfa/fxbarcode/utils.h" + +const FX_CHAR* CBC_OnedCode39Reader::ALPHABET_STRING = + "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. *$/+%"; +const FX_CHAR* CBC_OnedCode39Reader::CHECKSUM_STRING = + "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%"; +const int32_t CBC_OnedCode39Reader::CHARACTER_ENCODINGS[44] = { + 0x034, 0x121, 0x061, 0x160, 0x031, 0x130, 0x070, 0x025, 0x124, + 0x064, 0x109, 0x049, 0x148, 0x019, 0x118, 0x058, 0x00D, 0x10C, + 0x04C, 0x01C, 0x103, 0x043, 0x142, 0x013, 0x112, 0x052, 0x007, + 0x106, 0x046, 0x016, 0x181, 0x0C1, 0x1C0, 0x091, 0x190, 0x0D0, + 0x085, 0x184, 0x0C4, 0x094, 0x0A8, 0x0A2, 0x08A, 0x02A}; +const int32_t CBC_OnedCode39Reader::ASTERISK_ENCODING = 0x094; + +CBC_OnedCode39Reader::CBC_OnedCode39Reader() + : m_usingCheckDigit(FALSE), m_extendedMode(FALSE) {} +CBC_OnedCode39Reader::CBC_OnedCode39Reader(FX_BOOL usingCheckDigit) + : m_usingCheckDigit(usingCheckDigit), m_extendedMode(FALSE) {} +CBC_OnedCode39Reader::CBC_OnedCode39Reader(FX_BOOL usingCheckDigit, + FX_BOOL extendedMode) + : m_usingCheckDigit(usingCheckDigit), m_extendedMode(extendedMode) {} +CBC_OnedCode39Reader::~CBC_OnedCode39Reader() {} +CFX_ByteString CBC_OnedCode39Reader::DecodeRow(int32_t rowNumber, + CBC_CommonBitArray* row, + int32_t hints, + int32_t& e) { + CFX_Int32Array* start = FindAsteriskPattern(row, e); + BC_EXCEPTION_CHECK_ReturnValue(e, ""); + int32_t nextStart = (*start)[1]; + delete start; + int32_t end = row->GetSize(); + while (nextStart < end && !row->Get(nextStart)) { + nextStart++; + } + CFX_ByteString result; + CFX_Int32Array counters; + counters.SetSize(9); + FX_CHAR decodedChar; + do { + RecordPattern(row, nextStart, &counters, e); + BC_EXCEPTION_CHECK_ReturnValue(e, ""); + int32_t pattern = ToNarrowWidePattern(&counters); + if (pattern < 0) { + e = BCExceptionNotFound; + return ""; + } + decodedChar = PatternToChar(pattern, e); + BC_EXCEPTION_CHECK_ReturnValue(e, ""); + result += decodedChar; + for (int32_t i = 0; i < counters.GetSize(); i++) { + nextStart += counters[i]; + } + while (nextStart < end && !row->Get(nextStart)) { + nextStart++; + } + } while (decodedChar != '*'); + result = result.Mid(0, result.GetLength() - 1); + int32_t lastPatternSize = 0; + for (int32_t j = 0; j < counters.GetSize(); j++) { + lastPatternSize += counters[j]; + } + if (m_usingCheckDigit) { + int32_t max = result.GetLength() - 1; + int32_t total = 0; + int32_t len = (int32_t)strlen(ALPHABET_STRING); + for (int32_t k = 0; k < max; k++) { + for (int32_t j = 0; j < len; j++) + if (ALPHABET_STRING[j] == result[k]) { + total += j; + } + } + if (result[max] != (ALPHABET_STRING)[total % 43]) { + e = BCExceptionChecksumException; + return ""; + } + result = result.Mid(0, result.GetLength() - 1); + } + if (result.GetLength() == 0) { + e = BCExceptionNotFound; + return ""; + } + if (m_extendedMode) { + CFX_ByteString bytestr = DecodeExtended(result, e); + BC_EXCEPTION_CHECK_ReturnValue(e, ""); + return bytestr; + } else { + return result; + } +} +CFX_Int32Array* CBC_OnedCode39Reader::FindAsteriskPattern( + CBC_CommonBitArray* row, + int32_t& e) { + int32_t width = row->GetSize(); + int32_t rowOffset = 0; + while (rowOffset < width) { + if (row->Get(rowOffset)) { + break; + } + rowOffset++; + } + int32_t counterPosition = 0; + CFX_Int32Array counters; + counters.SetSize(9); + int32_t patternStart = rowOffset; + FX_BOOL isWhite = FALSE; + int32_t patternLength = counters.GetSize(); + for (int32_t i = rowOffset; i < width; i++) { + FX_BOOL pixel = row->Get(i); + if (pixel ^ isWhite) { + counters[counterPosition]++; + } else { + if (counterPosition == patternLength - 1) { + if (ToNarrowWidePattern(&counters) == ASTERISK_ENCODING) { + FX_BOOL bT1 = + row->IsRange(std::max(0, patternStart - (i - patternStart) / 2), + patternStart, FALSE, e); + BC_EXCEPTION_CHECK_ReturnValue(e, NULL); + if (bT1) { + CFX_Int32Array* result = new CFX_Int32Array; + result->SetSize(2); + (*result)[0] = patternStart; + (*result)[1] = i; + return result; + } + } + patternStart += counters[0] + counters[1]; + for (int32_t y = 2; y < patternLength; y++) { + counters[y - 2] = counters[y]; + } + counters[patternLength - 2] = 0; + counters[patternLength - 1] = 0; + counterPosition--; + } else { + counterPosition++; + } + counters[counterPosition] = 1; + isWhite = !isWhite; + } + } + e = BCExceptionNotFound; + return NULL; +} +int32_t CBC_OnedCode39Reader::ToNarrowWidePattern(CFX_Int32Array* counters) { + int32_t numCounters = counters->GetSize(); + int32_t maxNarrowCounter = 0; + int32_t wideCounters; + do { +#undef max + int32_t minCounter = FXSYS_IntMax; + for (int32_t i = 0; i < numCounters; i++) { + int32_t counter = (*counters)[i]; + if (counter < minCounter && counter > maxNarrowCounter) { + minCounter = counter; + } + } + maxNarrowCounter = minCounter; + wideCounters = 0; + int32_t totalWideCountersWidth = 0; + int32_t pattern = 0; + for (int32_t j = 0; j < numCounters; j++) { + int32_t counter = (*counters)[j]; + if ((*counters)[j] > maxNarrowCounter) { + pattern |= 1 << (numCounters - 1 - j); + wideCounters++; + totalWideCountersWidth += counter; + } + } + if (wideCounters == 3) { + for (int32_t k = 0; k < numCounters && wideCounters > 0; k++) { + int32_t counter = (*counters)[k]; + if ((*counters)[k] > maxNarrowCounter) { + wideCounters--; + if ((counter << 1) >= totalWideCountersWidth) { + return -1; + } + } + } + return pattern; + } + } while (wideCounters > 3); + return -1; +} +FX_CHAR CBC_OnedCode39Reader::PatternToChar(int32_t pattern, int32_t& e) { + for (int32_t i = 0; i < 44; i++) { + if (CHARACTER_ENCODINGS[i] == pattern) { + return (ALPHABET_STRING)[i]; + } + } + e = BCExceptionNotFound; + return 0; +} +CFX_ByteString CBC_OnedCode39Reader::DecodeExtended(CFX_ByteString& encoded, + int32_t& e) { + int32_t length = encoded.GetLength(); + CFX_ByteString decoded; + FX_CHAR c, next; + for (int32_t i = 0; i < length; i++) { + c = encoded[i]; + if (c == '+' || c == '$' || c == '%' || c == '/') { + next = encoded[i + 1]; + FX_CHAR decodedChar = '\0'; + switch (c) { + case '+': + if (next >= 'A' && next <= 'Z') { + decodedChar = (FX_CHAR)(next + 32); + } else { + e = BCExceptionFormatException; + return ""; + } + break; + case '$': + if (next >= 'A' && next <= 'Z') { + decodedChar = (FX_CHAR)(next - 64); + } else { + e = BCExceptionFormatException; + return ""; + } + break; + case '%': + if (next >= 'A' && next <= 'E') { + decodedChar = (FX_CHAR)(next - 38); + } else if (next >= 'F' && next <= 'J') { + decodedChar = (FX_CHAR)(next - 11); + } else if (next >= 'K' && next <= 'O' && next != 'M' && next != 'N') { + decodedChar = (FX_CHAR)(next + 16); + } else if (next >= 'P' && next <= 'S') { + decodedChar = (FX_CHAR)(next + 43); + } else if (next == 'U') { + decodedChar = (FX_CHAR)0; + } else if (next == 'V') { + decodedChar = (FX_CHAR)64; + } else if (next == 'W') { + decodedChar = (FX_CHAR)96; + } else if (next == 'T' || next == 'X' || next == 'Y' || next == 'Z') { + decodedChar = (FX_CHAR)127; + } else { + e = BCExceptionFormatException; + return ""; + } + break; + case '/': + if (next >= 'A' && next <= 'O') { + decodedChar = (FX_CHAR)(next - 32); + } else if (next == 'Z') { + decodedChar = ':'; + } else { + e = BCExceptionFormatException; + return ""; + } + break; + } + decoded += decodedChar; + i++; + } else { + decoded += c; + } + } + return decoded; +} |