diff options
| author | Bo Xu <bo_xu@foxitsoftware.com> | 2015-01-09 17:27:21 -0800 |
|---|---|---|
| committer | Bo Xu <bo_xu@foxitsoftware.com> | 2015-01-09 17:27:21 -0800 |
| commit | a902979f7c6a39fbdd8e9fc1b2ce00553b655eeb (patch) | |
| tree | 854a51dbf1577ee8493db769ba7c8ab07cc72140 /xfa/src/fxbarcode/common/BC_CommonBitSource.cpp | |
| parent | 5f21e9ddd181fc344f8d6070351858f98a25547e (diff) | |
| download | pdfium-a902979f7c6a39fbdd8e9fc1b2ce00553b655eeb.tar.xz | |
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
Diffstat (limited to 'xfa/src/fxbarcode/common/BC_CommonBitSource.cpp')
| -rw-r--r-- | xfa/src/fxbarcode/common/BC_CommonBitSource.cpp | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/xfa/src/fxbarcode/common/BC_CommonBitSource.cpp b/xfa/src/fxbarcode/common/BC_CommonBitSource.cpp new file mode 100644 index 0000000000..b71848a60c --- /dev/null +++ b/xfa/src/fxbarcode/common/BC_CommonBitSource.cpp @@ -0,0 +1,76 @@ +// 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 "BC_CommonBitSource.h"
+CBC_CommonBitSource::CBC_CommonBitSource(CFX_ByteArray* bytes)
+{
+ m_bytes.Copy((*bytes));
+ m_bitOffset = 0;
+ m_byteOffset = 0;
+}
+CBC_CommonBitSource::~CBC_CommonBitSource()
+{
+}
+FX_INT32 CBC_CommonBitSource::ReadBits(FX_INT32 numBits, FX_INT32 &e)
+{
+ if (numBits < 1 || numBits > 32) {
+ e = BCExceptionIllegalArgument;
+ return 0;
+ }
+ FX_INT32 result = 0;
+ if (m_bitOffset > 0) {
+ FX_INT32 bitsLeft = 8 - m_bitOffset;
+ FX_INT32 toRead = numBits < bitsLeft ? numBits : bitsLeft;
+ FX_INT32 bitsToNotRead = bitsLeft - toRead;
+ FX_INT32 mask = (0xff >> (8 - toRead)) << bitsToNotRead;
+ result = (m_bytes[m_byteOffset] & mask) >> bitsToNotRead;
+ numBits -= toRead;
+ m_bitOffset += toRead;
+ if (m_bitOffset == 8) {
+ m_bitOffset = 0;
+ m_byteOffset++;
+ }
+ }
+ if (numBits > 0) {
+ while(numBits >= 8) {
+ result = (result << 8) | (m_bytes[m_byteOffset] & 0xff);
+ m_byteOffset++;
+ numBits -= 8;
+ }
+ if (numBits > 0) {
+ FX_INT32 bitsToNotRead = 8 - numBits;
+ FX_INT32 mask = (0xff >> bitsToNotRead) << bitsToNotRead;
+ result = (result << numBits) | ((m_bytes[m_byteOffset] & mask) >> bitsToNotRead);
+ m_bitOffset += numBits;
+ }
+ }
+ return result;
+}
+FX_INT32 CBC_CommonBitSource::Available()
+{
+ return 8 * (m_bytes.GetSize() - m_byteOffset) - m_bitOffset;
+}
+FX_INT32 CBC_CommonBitSource::getByteOffset()
+{
+ return m_byteOffset;
+}
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