diff options
Diffstat (limited to 'xfa/src/fxbarcode/oned/BC_OnedCode39Reader.cpp')
| -rw-r--r-- | xfa/src/fxbarcode/oned/BC_OnedCode39Reader.cpp | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/xfa/src/fxbarcode/oned/BC_OnedCode39Reader.cpp b/xfa/src/fxbarcode/oned/BC_OnedCode39Reader.cpp new file mode 100644 index 0000000000..b19343943b --- /dev/null +++ b/xfa/src/fxbarcode/oned/BC_OnedCode39Reader.cpp @@ -0,0 +1,293 @@ +// 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;
+}
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