1 files changed, 110 insertions, 0 deletions
diff --git a/xfa/src/fxbarcode/datamatrix/BC_DataMatrixDecoder.cpp b/xfa/src/fxbarcode/datamatrix/BC_DataMatrixDecoder.cpp
new file mode 100644
index 0000000000..e9eb32cf84
--- /dev/null
+++ b/xfa/src/fxbarcode/datamatrix/BC_DataMatrixDecoder.cpp
@@ -0,0 +1,110 @@
+// 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 2007 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 "../common/BC_CommonBitMatrix.h"
+#include "../common/reedsolomon/BC_ReedSolomonDecoder.h"
+#include "../common/reedsolomon/BC_ReedSolomonGF256.h"
+#include "BC_DataMatrixDecoder.h"
+#include "BC_DataMatrixBitMatrixParser.h"
+#include "BC_DataMatrixVersion.h"
+#include "BC_DataMatrixDataBlock.h"
+#include "BC_DataMatrixDecodedBitStreamParser.h"
+CBC_DataMatrixDecoder::CBC_DataMatrixDecoder()
+{
+    m_rsDecoder = NULL;
+}
+void CBC_DataMatrixDecoder::Init()
+{
+    m_rsDecoder = FX_NEW CBC_ReedSolomonDecoder(CBC_ReedSolomonGF256::DataMatrixField);
+}
+CBC_DataMatrixDecoder::~CBC_DataMatrixDecoder()
+{
+    if(m_rsDecoder != NULL) {
+        delete m_rsDecoder;
+    }
+    m_rsDecoder = NULL;
+}
+CBC_CommonDecoderResult *CBC_DataMatrixDecoder::Decode(CBC_CommonBitMatrix *bits, FX_INT32 &e)
+{
+    CBC_DataMatrixBitMatrixParser parser;
+    parser.Init(bits, e);
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    CBC_DataMatrixVersion *version = parser.GetVersion();
+    CFX_ByteArray* byteTemp = parser.ReadCodewords(e);
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    CBC_AutoPtr<CFX_ByteArray> codewords(byteTemp);
+    CFX_PtrArray *dataBlocks = CBC_DataMatrixDataBlock::GetDataBlocks(codewords.get(), version, e);
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    FX_INT32 dataBlocksCount = dataBlocks->GetSize();
+    FX_INT32 totalBytes = 0;
+    FX_INT32 i, j;
+    for (i = 0; i < dataBlocksCount; i++) {
+        totalBytes += ((CBC_DataMatrixDataBlock*)(*dataBlocks)[i])->GetNumDataCodewords();
+    }
+    CFX_ByteArray resultBytes;
+    resultBytes.SetSize(totalBytes);
+    for (j = 0; j < dataBlocksCount; j++) {
+        CFX_ByteArray *codewordBytes = ((CBC_DataMatrixDataBlock*)(*dataBlocks)[j])->GetCodewords();
+        FX_INT32 numDataCodewords = ((CBC_DataMatrixDataBlock*)(*dataBlocks)[j])->GetNumDataCodewords();
+        CorrectErrors(*codewordBytes, numDataCodewords, e);
+        if (e != BCExceptionNO) {
+            for(FX_INT32 i = 0; i < dataBlocks->GetSize(); i++) {
+                delete (CBC_DataMatrixDataBlock*)(*dataBlocks)[i];
+            }
+            delete dataBlocks;
+            dataBlocks = NULL;
+            return NULL;
+        }
+        FX_INT32 i;
+        for (i = 0; i < numDataCodewords; i++) {
+            resultBytes[i * dataBlocksCount + j] = (*codewordBytes)[i];
+        }
+    }
+    for(i = 0; i < (dataBlocks->GetSize()); i++) {
+        delete (CBC_DataMatrixDataBlock*)(*dataBlocks)[i];
+    }
+    delete dataBlocks;
+    dataBlocks = NULL;
+    CBC_CommonDecoderResult *resultR = CBC_DataMatrixDecodedBitStreamParser::Decode(resultBytes, e);
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    return resultR;
+}
+void CBC_DataMatrixDecoder::CorrectErrors(CFX_ByteArray &codewordBytes, FX_INT32 numDataCodewords, FX_INT32 &e)
+{
+    FX_INT32 numCodewords = codewordBytes.GetSize();
+    CFX_Int32Array codewordsInts;
+    codewordsInts.SetSize(numCodewords);
+    FX_INT32 i;
+    for (i = 0; i < numCodewords; i++) {
+        codewordsInts[i] = codewordBytes[i] & 0xFF;
+    }
+    FX_INT32 numECCodewords = codewordBytes.GetSize() - numDataCodewords;
+    m_rsDecoder->Decode(&codewordsInts, numECCodewords, e);
+    if (e != BCExceptionNO) {
+        e = BCExceptionChecksumException;
+        return ;
+    }
+    for (i = 0; i < numDataCodewords; i++) {
+        codewordBytes[i] = (FX_BYTE) codewordsInts[i];
+    }
+}