///////////////////////////////////////////////////////////
//
// Return the specified number of bytes from the stream
//
///////////////////////////////////////////////////////////
void streamReader::read(imbxUint8* pBuffer, imbxUint32 bufferLength)
{
while(bufferLength != 0)
{
// Update the data buffer if it is empty
///////////////////////////////////////////////////////////
if(m_pDataBufferCurrent == m_pDataBufferEnd)
{
// EOF?
///////////////////////////////////////////////////////////
if(fillDataBuffer() == 0)
{
throw(streamExceptionEOF("Attempt to read past the end of the file"));
}
}
// Copy the available data into the return buffer
///////////////////////////////////////////////////////////
imbxUint32 copySize = bufferLength;
imbxUint32 maxSize = (imbxUint32)(m_pDataBufferEnd - m_pDataBufferCurrent);
if(copySize > maxSize)
{
copySize = maxSize;
}
::memcpy(pBuffer, m_pDataBufferCurrent, (size_t)copySize);
bufferLength -= copySize;
pBuffer += copySize;
m_pDataBufferCurrent += copySize;
}
}
///////////////////////////////////////////////////////////
//
// Return the specified number of bytes from the stream
//
///////////////////////////////////////////////////////////
void streamReader::read(imbxUint8* pBuffer, imbxUint32 bufferLength)
{
while(bufferLength != 0)
{
// Update the data buffer if it is empty
///////////////////////////////////////////////////////////
if(m_pDataBufferCurrent == m_pDataBufferEnd)
{
if(bufferLength >= m_pDataBufferMaxEnd - m_pDataBufferStart)
{
// read the data directly into the destination buffer
///////////////////////////////////////////////////////////
imbxUint32 readBytes(fillDataBuffer(pBuffer, bufferLength));
m_pDataBufferCurrent = m_pDataBufferEnd = m_pDataBufferStart;
m_dataBufferStreamPosition += readBytes;
pBuffer += readBytes;
bufferLength -= readBytes;
if(readBytes == 0)
{
throw(streamExceptionEOF("Attempt to read past the end of the file"));
}
continue;
}
if(fillDataBuffer() == 0)
{
throw(streamExceptionEOF("Attempt to read past the end of the file"));
}
}
// Copy the available data into the return buffer
///////////////////////////////////////////////////////////
imbxUint32 copySize = bufferLength;
imbxUint32 maxSize = (imbxUint32)(m_pDataBufferEnd - m_pDataBufferCurrent);
if(copySize > maxSize)
{
copySize = maxSize;
}
::memcpy(pBuffer, m_pDataBufferCurrent, (size_t)copySize);
bufferLength -= copySize;
pBuffer += copySize;
m_pDataBufferCurrent += copySize;
}
}
