76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
#include "f2c.h"
|
|
#include "fio.h"
|
|
|
|
#ifdef KR_headers
|
|
c_due(a) cilist *a;
|
|
#else
|
|
c_due(cilist *a)
|
|
#endif
|
|
{
|
|
if(f__init != 1) f_init();
|
|
f__init = 3;
|
|
if(a->ciunit>=MXUNIT || a->ciunit<0)
|
|
err(a->cierr,101,"startio");
|
|
f__sequential=f__formatted=f__recpos=0;
|
|
f__external=1;
|
|
f__curunit = &f__units[a->ciunit];
|
|
if(a->ciunit>=MXUNIT || a->ciunit<0)
|
|
err(a->cierr,101,"startio");
|
|
f__elist=a;
|
|
if(f__curunit->ufd==NULL && fk_open(DIR,UNF,a->ciunit) ) err(a->cierr,104,"due");
|
|
f__cf=f__curunit->ufd;
|
|
if(f__curunit->ufmt) err(a->cierr,102,"cdue");
|
|
if(!f__curunit->useek) err(a->cierr,104,"cdue");
|
|
if(f__curunit->ufd==NULL) err(a->cierr,114,"cdue");
|
|
if(a->cirec <= 0)
|
|
err(a->cierr,130,"due");
|
|
fseek(f__cf,(long)(a->cirec-1)*f__curunit->url,SEEK_SET);
|
|
f__curunit->uend = 0;
|
|
return(0);
|
|
}
|
|
#ifdef KR_headers
|
|
integer s_rdue(a) cilist *a;
|
|
#else
|
|
integer s_rdue(cilist *a)
|
|
#endif
|
|
{
|
|
int n;
|
|
f__reading=1;
|
|
if(n=c_due(a)) return(n);
|
|
if(f__curunit->uwrt && f__nowreading(f__curunit))
|
|
err(a->cierr,errno,"read start");
|
|
return(0);
|
|
}
|
|
#ifdef KR_headers
|
|
integer s_wdue(a) cilist *a;
|
|
#else
|
|
integer s_wdue(cilist *a)
|
|
#endif
|
|
{
|
|
int n;
|
|
f__reading=0;
|
|
if(n=c_due(a)) return(n);
|
|
if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit))
|
|
err(a->cierr,errno,"write start");
|
|
return(0);
|
|
}
|
|
integer e_rdue(Void)
|
|
{
|
|
f__init = 1;
|
|
if(f__curunit->url==1 || f__recpos==f__curunit->url)
|
|
return(0);
|
|
fseek(f__cf,(long)(f__curunit->url-f__recpos),SEEK_CUR);
|
|
if(ftell(f__cf)%f__curunit->url)
|
|
err(f__elist->cierr,200,"syserr");
|
|
return(0);
|
|
}
|
|
integer e_wdue(Void)
|
|
{
|
|
f__init = 1;
|
|
#ifdef ALWAYS_FLUSH
|
|
if (fflush(f__cf))
|
|
err(f__elist->cierr,errno,"write end");
|
|
#endif
|
|
return(e_rdue());
|
|
}
|