27 lines
462 B
C
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);
|
||
|
|
}
|