mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
84 lines
1.6 KiB
C++
84 lines
1.6 KiB
C++
// InBuffer.cpp
|
|
|
|
#include "StdAfx.h"
|
|
|
|
#include "../../../C/Alloc.h"
|
|
|
|
#include "InBuffer.h"
|
|
|
|
CInBuffer::CInBuffer():
|
|
_buffer(0),
|
|
_bufferLimit(0),
|
|
_bufferBase(0),
|
|
_stream(0),
|
|
_bufferSize(0)
|
|
{}
|
|
|
|
bool CInBuffer::Create(UInt32 bufferSize)
|
|
{
|
|
const UInt32 kMinBlockSize = 1;
|
|
if (bufferSize < kMinBlockSize)
|
|
bufferSize = kMinBlockSize;
|
|
if (_bufferBase != 0 && _bufferSize == bufferSize)
|
|
return true;
|
|
Free();
|
|
_bufferSize = bufferSize;
|
|
_bufferBase = (Byte *)::MidAlloc(bufferSize);
|
|
return (_bufferBase != 0);
|
|
}
|
|
|
|
void CInBuffer::Free()
|
|
{
|
|
::MidFree(_bufferBase);
|
|
_bufferBase = 0;
|
|
}
|
|
|
|
void CInBuffer::SetStream(ISequentialInStream *stream)
|
|
{
|
|
_stream = stream;
|
|
}
|
|
|
|
void CInBuffer::Init()
|
|
{
|
|
_processedSize = 0;
|
|
_buffer = _bufferBase;
|
|
_bufferLimit = _buffer;
|
|
_wasFinished = false;
|
|
#ifdef _NO_EXCEPTIONS
|
|
ErrorCode = S_OK;
|
|
#endif
|
|
}
|
|
|
|
bool CInBuffer::ReadBlock()
|
|
{
|
|
#ifdef _NO_EXCEPTIONS
|
|
if (ErrorCode != S_OK)
|
|
return false;
|
|
#endif
|
|
if (_wasFinished)
|
|
return false;
|
|
_processedSize += (_buffer - _bufferBase);
|
|
UInt32 numProcessedBytes;
|
|
HRESULT result = _stream->Read(_bufferBase, _bufferSize, &numProcessedBytes);
|
|
#ifdef _NO_EXCEPTIONS
|
|
ErrorCode = result;
|
|
#else
|
|
if (result != S_OK)
|
|
throw CInBufferException(result);
|
|
#endif
|
|
_buffer = _bufferBase;
|
|
_bufferLimit = _buffer + numProcessedBytes;
|
|
_wasFinished = (numProcessedBytes == 0);
|
|
return (!_wasFinished);
|
|
}
|
|
|
|
Byte CInBuffer::ReadBlock2()
|
|
{
|
|
if (!ReadBlock())
|
|
{
|
|
_processedSize++;
|
|
return 0xFF;
|
|
}
|
|
return *_buffer++;
|
|
}
|