// Copyright 2017 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
|
|
#ifndef CORE_FXCRT_CFX_BITSTREAM_H_
|
#define CORE_FXCRT_CFX_BITSTREAM_H_
|
|
#include <stdint.h>
|
|
#include "core/fxcrt/unowned_ptr.h"
|
|
class CFX_BitStream {
|
public:
|
CFX_BitStream(const uint8_t* pData, uint32_t dwSize);
|
~CFX_BitStream();
|
|
void ByteAlign();
|
|
bool IsEOF() const { return m_BitPos >= m_BitSize; }
|
uint32_t GetPos() const { return m_BitPos; }
|
uint32_t GetBits(uint32_t nBits);
|
|
void SkipBits(uint32_t nBits) { m_BitPos += nBits; }
|
void Rewind() { m_BitPos = 0; }
|
|
uint32_t BitsRemaining() const {
|
return m_BitSize >= m_BitPos ? m_BitSize - m_BitPos : 0;
|
}
|
|
private:
|
uint32_t m_BitPos;
|
uint32_t m_BitSize;
|
UnownedPtr<const uint8_t> m_pData;
|
};
|
|
#endif // CORE_FXCRT_CFX_BITSTREAM_H_
|
