freebsd-src/lib/libI77/rewind.c
L Jonas Olsson 876f9d8347 Library for f2c. (part 1 of 2)
Obtained from: netlib.att.com
1994-10-26 18:15:35 +00:00

25 lines
408 B
C

#include "f2c.h"
#include "fio.h"
#ifdef KR_headers
integer f_rew(a) alist *a;
#else
integer f_rew(alist *a)
#endif
{
unit *b;
if(a->aunit>=MXUNIT || a->aunit<0)
err(a->aerr,101,"rewind");
b = &f__units[a->aunit];
if(b->ufd == NULL || b->uwrt == 3)
return(0);
if(!b->useek)
err(a->aerr,106,"rewind")
if(b->uwrt) {
(void) t_runc(a);
b->uwrt = 3;
}
rewind(b->ufd);
b->uend=0;
return(0);
}