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#include "v3p_f2c.h"
#include "fio.h"
#ifdef __cplusplus
extern "C" {
#endif
extern uiolen f__reclen;
OFF_T f__recloc;
int
#ifdef KR_headers
c_sue(a) cilist *a;
#else
c_sue(cilist *a)
#endif
{
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);
}
#ifdef KR_headers
integer s_rsue(a) cilist *a;
#else
integer s_rsue(cilist *a)
#endif
{
int n;
if(!f__init) f_init();
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);
}
#ifdef KR_headers
integer s_wsue(a) cilist *a;
#else
integer s_wsue(cilist *a)
#endif
{
int n;
if(!f__init) f_init();
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;
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)
{
FSEEK(f__cf,(OFF_T)(f__reclen-f__recpos+sizeof(uiolen)),SEEK_CUR);
return(0);
}
#ifdef __cplusplus
}
#endif
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