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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 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 "../barcode.h"
#include "../BC_Reader.h"
#include "../common/BC_CommonBitArray.h"
#include "BC_OneDReader.h"
#include "BC_OnedCode39Reader.h"
FX_LPCSTR CBC_OnedCode39Reader::ALPHABET_STRING = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. *$/+%";
FX_LPCSTR CBC_OnedCode39Reader::CHECKSUM_STRING = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%";
const FX_INT32 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 FX_INT32 CBC_OnedCode39Reader::ASTERISK_ENCODING = 0x094;
CBC_OnedCode39Reader::CBC_OnedCode39Reader(): m_extendedMode(FALSE), m_usingCheckDigit(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_extendedMode = extendedMode;
m_usingCheckDigit = usingCheckDigit;
}
CBC_OnedCode39Reader::~CBC_OnedCode39Reader()
{
}
CFX_ByteString CBC_OnedCode39Reader::DecodeRow(FX_INT32 rowNumber, CBC_CommonBitArray *row, FX_INT32 hints, FX_INT32 &e)
{
CFX_Int32Array *start = FindAsteriskPattern(row, e);
BC_EXCEPTION_CHECK_ReturnValue(e, "");
FX_INT32 nextStart = (*start)[1];
if(start != NULL) {
delete start;
start = NULL;
}
FX_INT32 end = row->GetSize();
while (nextStart < end && !row->Get(nextStart)) {
nextStart++;
}
CFX_ByteString result;
CFX_Int32Array counters;
counters.SetSize(9);
FX_CHAR decodedChar;
FX_INT32 lastStart;
do {
RecordPattern(row, nextStart, &counters, e);
BC_EXCEPTION_CHECK_ReturnValue(e, "");
FX_INT32 pattern = ToNarrowWidePattern(&counters);
if (pattern < 0) {
e = BCExceptionNotFound;
return "";
}
decodedChar = PatternToChar(pattern, e);
BC_EXCEPTION_CHECK_ReturnValue(e, "");
result += decodedChar;
lastStart = nextStart;
for (FX_INT32 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);
FX_INT32 lastPatternSize = 0;
for (FX_INT32 j = 0; j < counters.GetSize(); j++) {
lastPatternSize += counters[j];
}
FX_INT32 whiteSpaceAfterEnd = nextStart - lastStart - lastPatternSize;
if(m_usingCheckDigit) {
FX_INT32 max = result.GetLength() - 1;
FX_INT32 total = 0;
FX_INT32 len = (FX_INT32)strlen(ALPHABET_STRING);
for (FX_INT32 k = 0; k < max; k++) {
for (FX_INT32 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, FX_INT32 &e)
{
FX_INT32 width = row->GetSize();
FX_INT32 rowOffset = 0;
while (rowOffset < width) {
if (row->Get(rowOffset)) {
break;
}
rowOffset++;
}
FX_INT32 counterPosition = 0;
CFX_Int32Array counters;
counters.SetSize(9);
FX_INT32 patternStart = rowOffset;
FX_BOOL isWhite = FALSE;
FX_INT32 patternLength = counters.GetSize();
for (FX_INT32 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(FX_MAX(0, patternStart - (i - patternStart) / 2), patternStart, FALSE, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
if (bT1) {
CFX_Int32Array *result = FX_NEW CFX_Int32Array;
result->SetSize(2);
(*result)[0] = patternStart;
(*result)[1] = i;
return result;
}
}
patternStart += counters[0] + counters[1];
for (FX_INT32 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;
}
FX_INT32 CBC_OnedCode39Reader::ToNarrowWidePattern(CFX_Int32Array *counters)
{
FX_INT32 numCounters = counters->GetSize();
FX_INT32 maxNarrowCounter = 0;
FX_INT32 wideCounters;
do {
#undef max
FX_INT32 minCounter = FXSYS_IntMax;
for (FX_INT32 i = 0; i < numCounters; i++) {
FX_INT32 counter = (*counters)[i];
if (counter < minCounter && counter > maxNarrowCounter) {
minCounter = counter;
}
}
maxNarrowCounter = minCounter;
wideCounters = 0;
FX_INT32 totalWideCountersWidth = 0;
FX_INT32 pattern = 0;
for (FX_INT32 j = 0; j < numCounters; j++) {
FX_INT32 counter = (*counters)[j];
if ((*counters)[j] > maxNarrowCounter) {
pattern |= 1 << (numCounters - 1 - j);
wideCounters++;
totalWideCountersWidth += counter;
}
}
if (wideCounters == 3) {
for (FX_INT32 k = 0; k < numCounters && wideCounters > 0; k++) {
FX_INT32 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(FX_INT32 pattern, FX_INT32 &e)
{
for (FX_INT32 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, FX_INT32 &e)
{
FX_INT32 length = encoded.GetLength();
CFX_ByteString decoded;
FX_CHAR c, next;
for(FX_INT32 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;
}