// 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/src/fxbarcode/barcode.h"
#include "xfa/src/fxbarcode/BC_Reader.h"
#include "xfa/src/fxbarcode/common/BC_CommonBitArray.h"
#include "BC_OneDReader.h"
#include "BC_OnedCode39Reader.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];
if (start != NULL) {
delete start;
start = NULL;
}
int32_t end = row->GetSize();
while (nextStart < end && !row->Get(nextStart)) {
nextStart++;
}
CFX_ByteString result;
CFX_Int32Array counters;
counters.SetSize(9);
FX_CHAR decodedChar;
int32_t lastStart;
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;
lastStart = nextStart;
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;
}