1 files changed, 114 insertions, 0 deletions
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixDecoder.cpp b/xfa/fxbarcode/datamatrix/BC_DataMatrixDecoder.cpp
new file mode 100644
index 0000000000..3f765aa8f9
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+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixDecoder.cpp
@@ -0,0 +1,114 @@
+// 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 "xfa/fxbarcode/datamatrix/BC_DataMatrixDecoder.h"
+
+#include <memory>
+
+#include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
+#include "xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.h"
+#include "xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
+#include "xfa/fxbarcode/datamatrix/BC_DataMatrixBitMatrixParser.h"
+#include "xfa/fxbarcode/datamatrix/BC_DataMatrixDataBlock.h"
+#include "xfa/fxbarcode/datamatrix/BC_DataMatrixDecodedBitStreamParser.h"
+#include "xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.h"
+
+CBC_DataMatrixDecoder::CBC_DataMatrixDecoder() {
+  m_rsDecoder = NULL;
+}
+void CBC_DataMatrixDecoder::Init() {
+  m_rsDecoder =
+      new CBC_ReedSolomonDecoder(CBC_ReedSolomonGF256::DataMatrixField);
+}
+CBC_DataMatrixDecoder::~CBC_DataMatrixDecoder() {
+  delete m_rsDecoder;
+}
+CBC_CommonDecoderResult* CBC_DataMatrixDecoder::Decode(
+    CBC_CommonBitMatrix* bits,
+    int32_t& e) {
+  CBC_DataMatrixBitMatrixParser parser;
+  parser.Init(bits, e);
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  CBC_DataMatrixVersion* version = parser.GetVersion();
+  std::unique_ptr<CFX_ByteArray> codewords(parser.ReadCodewords(e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  CFX_PtrArray* dataBlocks =
+      CBC_DataMatrixDataBlock::GetDataBlocks(codewords.get(), version, e);
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  int32_t dataBlocksCount = dataBlocks->GetSize();
+  int32_t totalBytes = 0;
+  int32_t 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();
+    int32_t numDataCodewords =
+        ((CBC_DataMatrixDataBlock*)(*dataBlocks)[j])->GetNumDataCodewords();
+    CorrectErrors(*codewordBytes, numDataCodewords, e);
+    if (e != BCExceptionNO) {
+      for (int32_t i = 0; i < dataBlocks->GetSize(); i++) {
+        delete (CBC_DataMatrixDataBlock*)(*dataBlocks)[i];
+      }
+      delete dataBlocks;
+      dataBlocks = NULL;
+      return NULL;
+    }
+    int32_t 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,
+                                          int32_t numDataCodewords,
+                                          int32_t& e) {
+  int32_t numCodewords = codewordBytes.GetSize();
+  CFX_Int32Array codewordsInts;
+  codewordsInts.SetSize(numCodewords);
+  int32_t i;
+  for (i = 0; i < numCodewords; i++) {
+    codewordsInts[i] = codewordBytes[i] & 0xFF;
+  }
+  int32_t numECCodewords = codewordBytes.GetSize() - numDataCodewords;
+  m_rsDecoder->Decode(&codewordsInts, numECCodewords, e);
+  if (e != BCExceptionNO) {
+    e = BCExceptionChecksumException;
+    return;
+  }
+  for (i = 0; i < numDataCodewords; i++) {
+    codewordBytes[i] = (uint8_t)codewordsInts[i];
+  }
+}