Category : C Source Code
Archive   : F2CSRC.ZIP
Filename : DFE.C

#include "f2c.h"
#include "fio.h"
#include "fmt.h"
extern int rd_ed(),rd_ned(),y_getc(),y_putc(),y_err();
extern int y_rev(), y_rsk(), y_newrec();
extern int w_ed(),w_ned();
integer s_rdfe(a) cilist *a;
{
int n;
if(!init) f_init();
if(n=c_dfe(a))return(n);
reading=1;
if(curunit->uwrt && nowreading(curunit))
err(a->cierr,errno,"read start");
getn = y_getc;
doed = rd_ed;
doned = rd_ned;
dorevert = donewrec = y_err;
doend = y_rsk;
if(pars_f(fmtbuf)<0)
err(a->cierr,100,"read start");
fmt_bg();
return(0);
}
integer s_wdfe(a) cilist *a;
{
int n;
if(!init) f_init();
if(n=c_dfe(a)) return(n);
reading=0;
if(curunit->uwrt != 1 && nowwriting(curunit))
err(a->cierr,errno,"startwrt");
putn = y_putc;
doed = w_ed;
doned= w_ned;
dorevert = y_err;
donewrec = y_newrec;
doend = y_rev;
if(pars_f(fmtbuf)<0)
err(a->cierr,100,"startwrt");
fmt_bg();
return(0);
}
integer e_rdfe()
{
(void) en_fio();
return(0);
}
integer e_wdfe()
{
(void) en_fio();

return(0);
}
c_dfe(a) cilist *a;
{
sequential=0;
formatted=external=1;
elist=a;
cursor=scale=recpos=0;
if(a->ciunit>MXUNIT || a->ciunit<0)
err(a->cierr,101,"startchk");
curunit = &units[a->ciunit];
if(curunit->ufd==NULL && fk_open(DIR,FMT,a->ciunit))
err(a->cierr,104,"dfe");
cf=curunit->ufd;
if(!curunit->ufmt) err(a->cierr,102,"dfe")
if(!curunit->useek) err(a->cierr,104,"dfe")
fmtbuf=a->cifmt;
(void) fseek(cf,(long)curunit->url * (a->cirec-1),SEEK_SET);
curunit->uend = 0;
return(0);
}
y_rsk()
{
if(curunit->uend || curunit->url <= recpos
|| curunit->url == 1) return 0;
do {
getc(cf);
} while(++recpos < curunit->url);
return 0;
}
y_getc()
{
int ch;
if(curunit->uend) return(-1);
if((ch=getc(cf))!=EOF)
{
recpos++;
if(curunit->url>=recpos ||
curunit->url==1)
return(ch);
else return(' ');
}
if(feof(cf))
{
curunit->uend=1;
errno=0;
return(-1);
}
err(elist->cierr,errno,"readingd");
}
y_putc(c)
{
recpos++;
if(recpos <= curunit->url || curunit->url==1)
putc(c,cf);
else
err(elist->cierr,110,"dout");
return(0);
}
y_rev()
{ /*what about work done?*/
if(curunit->url==1 || recpos==curunit->url)
return(0);
while(recposurl)
(*putn)(' ');
recpos=0;
return(0);
}
y_err()
{
err(elist->cierr, 110, "dfe");
}

y_newrec()
{
if(curunit->url == 1 || recpos == curunit->url) {
hiwater = recpos = cursor = 0;
return(1);
}
if(hiwater > recpos)
recpos = hiwater;
y_rev();
hiwater = cursor = 0;
return(1);
}