Organize barcode codes into modules.

xfa/src/fxbarcode/src/BC_CommonBitSource.cpp

-// 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 "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;
-}