gcc/libf2c/libI77/rewind.c
Jeff Law 81fea2b1d1 * Previous contents of gcc/f/runtime moved into toplevel
"libf2c" directory.

From-SVN: r17568
1998-01-31 18:37:08 -07:00

27 lines
462 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 (f__init & 2)
f__fatal (131, "I/O recursion");
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);
}