#include	"sfstdio.h"

/*	Reposition stream IO pointer
**	Written by Kiem-Phong Vo
*/


#if __STD_C
int fseek(FILE* f, long offset, int whence)
#else
int fseek(f,offset,whence)
reg FILE*	f;
reg long	offset;
reg int		whence;
#endif
{
	reg Sfio_t*	sf;

	if(!(sf = SFSTREAM(f)))
		return -1;

	/* ready for either read or write */
#if _FILE_cnt
	f->std_cnt = 0;
#endif
#if _FILE_r
	f->std_r = 0;
#endif
#if _FILE_w
	f->std_w = 0;
#endif
#if _FILE_readptr
	f->std_readptr = f->std_readend = NIL(uchar*);
#endif
#if _FILE_writeptr
	f->std_writeptr = f->std_writeend = NIL(uchar*);
#endif

	return sfseek(sf, (Sfoff_t)offset, whence|SF_SHARE) < (Sfoff_t)0 ? -1 : 0;
}