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#include "config.h"
#include "f2c.h"
#include "fio.h"
int
c_due (cilist * a)
{
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, (off_t) (a->cirec - 1) * f__curunit->url, SEEK_SET);
f__curunit->uend = 0;
return (0);
}
integer
s_rdue (cilist * a)
{
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);
}
integer
s_wdue (cilist * a)
{
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, (off_t) (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 ());
}
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