Bridge class for passing BPositionIO to functions who need CIO in MACLib
Ver 1.01
Copyright (C) 2005-2008 by SHINTA
==============================================================================*/
BPositionIO* passed to SetPositionIO() must not be released before rleasing this class.
==============================================================================*/
#include "PositionBridgeIO.h"
#include "All.h"
TPositionBridgeIO::TPositionBridgeIO()
: CIO()
{
mPositionIO = NULL;
}
TPositionBridgeIO::~TPositionBridgeIO()
{
}
int TPositionBridgeIO::Close()
{
return B_OK;
}
int TPositionBridgeIO::Create(const char* oName)
{
return B_OK;
}
int TPositionBridgeIO::Delete()
{
return B_ERROR;
}
int TPositionBridgeIO::GetName(char* oBuffer)
{
strcpy(oBuffer, "<TPositionBridgeIO>");
return B_OK;
}
int TPositionBridgeIO::GetPosition()
{
if ( mPositionIO == NULL )
return 0;
return mPositionIO->Position();
}
int TPositionBridgeIO::GetSize()
{
if ( mPositionIO == NULL )
return 0;
off_t aSize;
status_t err = mPositionIO->GetSize(&aSize);
if (err != B_OK)
return -1;
return aSize;
}
int TPositionBridgeIO::Open(const char* oName)
{
return B_OK;
}
int TPositionBridgeIO::Read(void* oBuf, unsigned int oBytesToRead, unsigned int* oBytesRead)
{
if ( mPositionIO == NULL )
return ERROR_IO_READ;
*oBytesRead = mPositionIO->Read(oBuf, oBytesToRead);
return *oBytesRead == 0 ? ERROR_IO_READ : B_OK;
}
int TPositionBridgeIO::Seek(int oDistance, unsigned int oMoveMode)
{
if ( mPositionIO == NULL )
return B_ERROR;
return mPositionIO->Seek(oDistance, oMoveMode) < B_OK ? B_ERROR : B_OK;
}
int TPositionBridgeIO::SetEOF()
{
if ( mPositionIO == NULL )
return B_ERROR;
mPositionIO->SetSize(mPositionIO->Position());
return B_OK;
}
status_t TPositionBridgeIO::SetPositionIO(BPositionIO* oPositionIO)
{
mPositionIO = oPositionIO;
return B_OK;
}
untested function
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' */
int TPositionBridgeIO::Write(const void* oBuf, unsigned int oBytesToWrite, unsigned int* oBytesWritten)
{
if ( mPositionIO == NULL )
return ERROR_IO_WRITE;
*oBytesWritten = mPositionIO->Write(oBuf, oBytesToWrite);
return *oBytesWritten != oBytesToWrite ? ERROR_IO_WRITE : B_OK;
}
