XN_C_API XnStatus xnOSLoadFile(const XnChar* cpFileName, void* pBuffer, const XnUInt32 nBufferSize)
{
// Local function variables
XN_FILE_HANDLE FileHandle;
XnUInt32 nReadBytes = nBufferSize;
XnStatus nRetVal = XN_STATUS_OK;
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(cpFileName);
XN_VALIDATE_OUTPUT_PTR(pBuffer);
if (nBufferSize == 0)
{
return XN_STATUS_NULL_OUTPUT_PTR;
}
nRetVal = xnOSOpenFile(cpFileName, XN_OS_FILE_READ, &FileHandle);
XN_IS_STATUS_OK(nRetVal);
nRetVal = xnOSReadFile(FileHandle, pBuffer, &nReadBytes);
if ((nRetVal != XN_STATUS_OK) || (nReadBytes != nBufferSize))
{
xnOSCloseFile(&FileHandle);
return (XN_STATUS_OS_FILE_READ_FAILED);
}
nRetVal = xnOSCloseFile(&FileHandle);
XN_IS_STATUS_OK(nRetVal);
// All is good...
return (XN_STATUS_OK);
}
XnStatus XN_CALLBACK_TYPE PlayerDriver::FileRead(void* pCookie, void* pBuffer, XnUInt32 nSize, XnUInt32* pnBytesRead)
{
PlayerDriver* pThis = (PlayerDriver*)pCookie;
XnUInt32 bufferSize = nSize;
XnStatus rc = xnOSReadFile(pThis->m_fileHandle, pBuffer, &bufferSize);
*pnBytesRead = bufferSize;
return rc;
}
XnStatus XnIOFileStream::ReadData(XnUChar *pData, XnUInt32 nDataSize)
{
XnStatus nRetVal = XN_STATUS_OK;
XnUInt32 nReadSize = nDataSize;
nRetVal = xnOSReadFile(m_hFile, pData, &nReadSize);
XN_IS_STATUS_OK(nRetVal);
if (nReadSize != nDataSize)
{
return XN_STATUS_OS_FILE_READ_FAILED;
}
return (XN_STATUS_OK);
}
