#include "v3p_f2c.h"
#include "fio.h"
#include "fmt.h"
#ifdef __cplusplus
extern "C" {
#endif

 int
y_rsk(Void)
{
        if(f__curunit->uend || f__curunit->url <= f__recpos
                || f__curunit->url == 1) return 0;
        do {
                getc(f__cf);
        } while(++f__recpos < f__curunit->url);
        return 0;
}

 int
y_getc(Void)
{
        int ch;
        if(f__curunit->uend) return(-1);
        if((ch=getc(f__cf))!=EOF)
        {
                f__recpos++;
                if(f__curunit->url>=f__recpos ||
                        f__curunit->url==1)
                        return(ch);
                else    return(' ');
        }
        if(feof(f__cf))
        {
                f__curunit->uend=1;
                errno=0;
                return(-1);
        }
        err(f__elist->cierr,errno,"readingd");
}

 static int
y_rev(Void)
{
        if (f__recpos < f__hiwater)
                f__recpos = f__hiwater;
        if (f__curunit->url > 1)
                while(f__recpos < f__curunit->url)
                        (*f__putn)(' ');
        if (f__recpos)
                f__putbuf(0);
        f__recpos = 0;
        return(0);
}

 static int
y_err(Void)
{
        err(f__elist->cierr, 110, "dfe");
}

 static int
y_newrec(Void)
{
        y_rev();
        f__hiwater = f__cursor = 0;
        return(1);
}

 int
#ifdef KR_headers
c_dfe(a) cilist *a;
#else
c_dfe(cilist *a)
#endif
{
        f__sequential=0;
        f__formatted=f__external=1;
        f__elist=a;
        f__cursor=f__scale=f__recpos=0;
        f__curunit = &f__units[a->ciunit];
        if(a->ciunit>MXUNIT || a->ciunit<0)
                err(a->cierr,101,"startchk");
        if(f__curunit->ufd==NULL && fk_open(DIR,FMT,a->ciunit))
                err(a->cierr,104,"dfe");
        f__cf=f__curunit->ufd;
        if(!f__curunit->ufmt) err(a->cierr,102,"dfe")
        if(!f__curunit->useek) err(a->cierr,104,"dfe")
        f__fmtbuf=a->cifmt;
        if(a->cirec <= 0)
                err(a->cierr,130,"dfe")
        FSEEK(f__cf,(OFF_T)f__curunit->url * (a->cirec-1),SEEK_SET);
        f__curunit->uend = 0;
        return(0);
}
#ifdef KR_headers
integer s_rdfe(a) cilist *a;
#else
integer s_rdfe(cilist *a)
#endif
{
        int n;
        if(!f__init) f_init();
        f__reading=1;
        if(n=c_dfe(a))return(n);
        if(f__curunit->uwrt && f__nowreading(f__curunit))
                err(a->cierr,errno,"read start");
        f__getn = y_getc;
        f__doed = rd_ed;
        f__doned = rd_ned;
        f__dorevert = f__donewrec = y_err;
        f__doend = y_rsk;
        if(pars_f(f__fmtbuf)<0)
                err(a->cierr,100,"read start");
        fmt_bg();
        return(0);
}
#ifdef KR_headers
integer s_wdfe(a) cilist *a;
#else
integer s_wdfe(cilist *a)
#endif
{
        int n;
        if(!f__init) f_init();
        f__reading=0;
        if(n=c_dfe(a)) return(n);
        if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit))
                err(a->cierr,errno,"startwrt");
        f__putn = x_putc;
        f__doed = w_ed;
        f__doned= w_ned;
        f__dorevert = y_err;
        f__donewrec = y_newrec;
        f__doend = y_rev;
        if(pars_f(f__fmtbuf)<0)
                err(a->cierr,100,"startwrt");
        fmt_bg();
        return(0);
}
integer e_rdfe(Void)
{
        en_fio();
        return 0;
}
integer e_wdfe(Void)
{
        return en_fio();
}
#ifdef __cplusplus
}
#endif
