FNFCISEEK macro
The FNFCISEEK macro provides the declaration for the application-defined callback function to move a file pointer to the specified location in an FCI context.
Syntax
long FNFCISEEK( INT_PTR hf, long dist, int seektype, int FAR *err, void FAR *pv );
Parameters
- hf
-
An application-defined value used to identify the open file.
- dist
-
The number of bytes to move the file pointer.
- seektype
-
The starting point for the file pointer to move.
- err
-
Pointer to the error code value. This value will be used to provide extended error information in the ERF structure used to create the FCI context.
- pv
-
Pointer to an application-defined value.
Return value
The return value is the new file pointer position, or -1 if an error occurs.
Remarks
The function accepts parameters similar to _lseek with the addition to err and pv.
Examples
FNFCISEEK(fnFileSeek)
{
INT iResult = 0;
UNREFERENCED_PARAMETER(pv);
iResult = SetFilePointer((HANDLE)hf, dist, NULL, seektype);
if ( iResult == -1 )
{
*err = GetLastError();
}
return iResult;
}
Requirements
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Header |
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See also