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#include "config.h"
#include "f2c.h"
#include "fio.h"
extern uiolen f__reclen;
off_t f__recloc;
int
c_sue (cilist * a)
{
f__external = f__sequential = 1;
f__formatted = 0;
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 (SEQ, UNF, a->ciunit))
err (a->cierr, 114, "sue");
f__cf = f__curunit->ufd;
if (f__curunit->ufmt)
err (a->cierr, 103, "sue");
if (!f__curunit->useek)
err (a->cierr, 103, "sue");
return (0);
}
integer
s_rsue (cilist * a)
{
int n;
if (f__init != 1)
f_init ();
f__init = 3;
f__reading = 1;
if ((n = c_sue (a)))
return (n);
f__recpos = 0;
if (f__curunit->uwrt && f__nowreading (f__curunit))
err (a->cierr, errno, "read start");
if (fread ((char *) &f__reclen, sizeof (uiolen), 1, f__cf) != 1)
{
if (feof (f__cf))
{
f__curunit->uend = 1;
err (a->ciend, EOF, "start");
}
clearerr (f__cf);
err (a->cierr, errno, "start");
}
return (0);
}
integer
s_wsue (cilist * a)
{
int n;
if (f__init != 1)
f_init ();
f__init = 3;
if ((n = c_sue (a)))
return (n);
f__reading = 0;
f__reclen = 0;
if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit))
err (a->cierr, errno, "write start");
f__recloc = FTELL (f__cf);
FSEEK (f__cf, (off_t) sizeof (uiolen), SEEK_CUR);
return (0);
}
integer
e_wsue (void)
{
off_t loc;
f__init = 1;
fwrite ((char *) &f__reclen, sizeof (uiolen), 1, f__cf);
#ifdef ALWAYS_FLUSH
if (fflush (f__cf))
err (f__elist->cierr, errno, "write end");
#endif
loc = FTELL (f__cf);
FSEEK (f__cf, f__recloc, SEEK_SET);
fwrite ((char *) &f__reclen, sizeof (uiolen), 1, f__cf);
FSEEK (f__cf, loc, SEEK_SET);
return (0);
}
integer
e_rsue (void)
{
f__init = 1;
FSEEK (f__cf, (off_t) (f__reclen - f__recpos + sizeof (uiolen)), SEEK_CUR);
return (0);
}
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