Organize barcode codes into modules.

Previously all the files in barcode are lumped together.
The naming of some files are inconsistent,
leading to difficult understanding of the structure.
Now files are grouped based on different barcode type like in zxing.
This also matches what it looks like in other xfa folders.
The file names in each folder could be further modified to be consistent.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/842043002

1 files changed, 235 insertions, 0 deletions

diff --git a/xfa/src/fxbarcode/oned/BC_OneDimReader.cpp b/xfa/src/fxbarcode/oned/BC_OneDimReader.cpp
new file mode 100644
index 0000000000..f1db94a6a1
--- /dev/null
+++ b/xfa/src/fxbarcode/oned/BC_OneDimReader.cpp
@@ -0,0 +1,235 @@
+// 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_OneDimReader.h"

+const FX_INT32 CBC_OneDimReader::MAX_AVG_VARIANCE = (FX_INT32)(256 * 0.48f);

+const FX_INT32 CBC_OneDimReader::MAX_INDIVIDUAL_VARIANCE = (FX_INT32)(256 * 0.7f);

+const FX_INT32 CBC_OneDimReader::START_END_PATTERN[3] = {1, 1, 1};

+const FX_INT32 CBC_OneDimReader::MIDDLE_PATTERN[5] = {1, 1, 1, 1, 1};

+const FX_INT32 CBC_OneDimReader::L_PATTERNS[10][4] = {

+    {3, 2, 1, 1},

+    {2, 2, 2, 1},

+    {2, 1, 2, 2},

+    {1, 4, 1, 1},

+    {1, 1, 3, 2},

+    {1, 2, 3, 1},

+    {1, 1, 1, 4},

+    {1, 3, 1, 2},

+    {1, 2, 1, 3},

+    {3, 1, 1, 2}

+};

+const FX_INT32 CBC_OneDimReader::L_AND_G_PATTERNS[20][4] = {

+    {3, 2, 1, 1},

+    {2, 2, 2, 1},

+    {2, 1, 2, 2},

+    {1, 4, 1, 1},

+    {1, 1, 3, 2},

+    {1, 2, 3, 1},

+    {1, 1, 1, 4},

+    {1, 3, 1, 2},

+    {1, 2, 1, 3},

+    {3, 1, 1, 2},

+    {1, 1, 2, 3},

+    {1, 2, 2, 2},

+    {2, 2, 1, 2},

+    {1, 1, 4, 1},

+    {2, 3, 1, 1},

+    {1, 3, 2, 1},

+    {4, 1, 1, 1},

+    {2, 1, 3, 1},

+    {3, 1, 2, 1},

+    {2, 1, 1, 3}

+};

+CBC_OneDimReader::CBC_OneDimReader()

+{

+}

+CBC_OneDimReader::~CBC_OneDimReader()

+{

+}

+CFX_Int32Array *CBC_OneDimReader::FindStartGuardPattern(CBC_CommonBitArray *row, FX_INT32 &e)

+{

+    FX_BOOL foundStart = FALSE;

+    CFX_Int32Array *startRange = NULL;

+    CFX_Int32Array startEndPattern;

+    startEndPattern.SetSize(3);

+    startEndPattern[0] = START_END_PATTERN[0];

+    startEndPattern[1] = START_END_PATTERN[1];

+    startEndPattern[2] = START_END_PATTERN[2];

+    FX_INT32 nextStart = 0;

+    while (!foundStart) {

+        if(startRange != NULL) {

+            delete startRange;

+            startRange = NULL;

+        }

+        startRange = FindGuardPattern(row, nextStart, FALSE, &startEndPattern, e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        FX_INT32 start = (*startRange)[0];

+        nextStart = (*startRange)[1];

+        if (start <= 1) {

+            break;

+        }

+        FX_INT32 quietStart = start - (nextStart - start);

+        if (quietStart >= 0) {

+            FX_BOOL booT = row->IsRange(quietStart, start, FALSE, e);

+            BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+            foundStart = booT;

+        }

+    }

+    return startRange;

+}

+CFX_ByteString CBC_OneDimReader::DecodeRow(FX_INT32 rowNumber, CBC_CommonBitArray *row, FX_INT32 hints, FX_INT32 &e)

+{

+    CFX_Int32Array* StartPattern = FindStartGuardPattern(row, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, "");

+    CBC_AutoPtr<CFX_Int32Array > result(StartPattern);

+    CFX_ByteString temp = DecodeRow(rowNumber, row, result.get(), hints, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, "");

+    return temp;

+}

+CFX_ByteString CBC_OneDimReader::DecodeRow(FX_INT32 rowNumber, CBC_CommonBitArray *row, CFX_Int32Array *startGuardRange, FX_INT32 hints, FX_INT32 &e)

+{

+    CFX_ByteString result;

+    FX_INT32 endStart = DecodeMiddle(row, startGuardRange, result, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, "");

+    FX_BOOL b = CheckChecksum(result, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, "");

+    if (!b) {

+        e = BCExceptionChecksumException;

+        return "";

+    }

+    return result;

+}

+FX_BOOL CBC_OneDimReader::CheckChecksum(CFX_ByteString &s, FX_INT32 &e)

+{

+    FX_BOOL temp = CheckStandardUPCEANChecksum(s, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);

+    return temp;

+}

+FX_BOOL CBC_OneDimReader::CheckStandardUPCEANChecksum(CFX_ByteString &s, FX_INT32 &e)

+{

+    FX_INT32 length = s.GetLength();

+    if (length == 0) {

+        return FALSE;

+    }

+    FX_INT32 sum = 0;

+    for (FX_INT32 i = length - 2; i >= 0; i -= 2) {

+        FX_INT32 digit = (FX_INT32) s[i] - (FX_INT32) '0';

+        if (digit < 0 || digit > 9) {

+            e = BCExceptionFormatException;

+            return FALSE;

+        }

+        sum += digit;

+    }

+    sum *= 3;

+    for (FX_INT32 j = length - 1; j >= 0; j -= 2) {

+        FX_INT32 digit = (FX_INT32) s[j] - (FX_INT32) '0';

+        if (digit < 0 || digit > 9) {

+            e = BCExceptionFormatException;

+            return FALSE;

+        }

+        sum += digit;

+    }

+    return sum % 10 == 0;

+}

+CFX_Int32Array *CBC_OneDimReader::DecodeEnd(CBC_CommonBitArray* row, FX_INT32 endStart, FX_INT32 &e)

+{

+    CFX_Int32Array startEndPattern;

+    startEndPattern.Add(START_END_PATTERN[0]);

+    startEndPattern.Add(START_END_PATTERN[1]);

+    startEndPattern.Add(START_END_PATTERN[2]);

+    CFX_Int32Array* FindGuard = FindGuardPattern(row, endStart, FALSE, &startEndPattern, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    return FindGuard;

+}

+CFX_Int32Array *CBC_OneDimReader::FindGuardPattern(CBC_CommonBitArray *row, FX_INT32 rowOffset, FX_BOOL whiteFirst, CFX_Int32Array *pattern, FX_INT32 &e)

+{

+    FX_INT32 patternLength = pattern->GetSize();

+    CFX_Int32Array counters;

+    counters.SetSize(patternLength);

+    FX_INT32 width = row->GetSize();

+    FX_BOOL isWhite = FALSE;

+    while (rowOffset < width) {

+        isWhite = !row->Get(rowOffset);

+        if (whiteFirst == isWhite) {

+            break;

+        }

+        rowOffset++;

+    }

+    FX_INT32 counterPosition = 0;

+    FX_INT32 patternStart = rowOffset;

+    for (FX_INT32 x = rowOffset; x < width; x++) {

+        FX_BOOL pixel = row->Get(x);

+        if (pixel ^ isWhite) {

+            counters[counterPosition]++;

+        } else {

+            if (counterPosition == patternLength - 1) {

+                if (PatternMatchVariance(&counters, &(*pattern)[0], MAX_INDIVIDUAL_VARIANCE) < MAX_AVG_VARIANCE) {

+                    CFX_Int32Array *result = FX_NEW CFX_Int32Array();

+                    result->SetSize(2);

+                    (*result)[0] = patternStart;

+                    (*result)[1] = x;

+                    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;

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    return NULL;

+}

+FX_INT32 CBC_OneDimReader::DecodeDigit(CBC_CommonBitArray *row, CFX_Int32Array *counters, FX_INT32 rowOffset, const FX_INT32* patterns, FX_INT32 patternLength, FX_INT32 &e)

+{

+    RecordPattern(row, rowOffset, counters, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, 0);

+    FX_INT32 bestVariance = MAX_AVG_VARIANCE;

+    FX_INT32 bestMatch = -1;

+    FX_INT32 max = patternLength;

+    for (FX_INT32 i = 0; i < max; i++) {

+        FX_INT32 variance = PatternMatchVariance(counters, &patterns[i * 4], MAX_INDIVIDUAL_VARIANCE);

+        if (variance < bestVariance) {

+            bestVariance = variance;

+            bestMatch = i;

+        }

+    }

+    if (bestMatch >= 0) {

+        return bestMatch;

+    } else {

+        e = BCExceptionNotFound;

+        return 0;

+    }

+    return 0;

+}