BSD 4_1c_2 release

[unix-history] / usr / src / usr.lib / libI77 / inquire.c

/*
char id_inquire[] = "@(#)inquire.c      1.2";
*
* inquire.c - f77 i/o inquire statement routine
*/

#include "fio.h"

f_inqu(a) inlist *a;
{       char *byfile;
       int i;
       unit *p;
       char buf[256], *s;
       long x_inode;

       elist = NO;
       lfname = a->infile;
       lunit = a->inunit;
       external = YES;
       p = NULL;
       if(byfile=a->infile)
       {
               g_char(a->infile,a->infilen,buf);
               if((x_inode=inode(buf))==-1)
               {       if(a->inex) *a->inex = NO;  /* doesn't exist */
                       return(OK);
               }
               for(i=0;i<MXUNIT;i++)
                       if(units[i].ufd && (units[i].uinode==x_inode))
                       {
                               p = &units[i];
                               break;
                       }
       }
       else
       {
               if (not_legal(lunit)) err(a->inerr,F_ERUNIT,"inquire")
               else
                       if (units[lunit].ufd)
                       {       p= &units[lunit];
                               lfname = p->ufnm;
                       }
       }
       if(a->inex) *a->inex= ((byfile && x_inode) || (!byfile && p));
       if(a->inopen) *a->inopen=(p!=NULL);
       if(a->innum) *a->innum= (p?(p-units):-1);
       if(a->innamed) *a->innamed= (byfile || (p && p->ufnm));
       if(a->inname)
       {
               if(byfile) s = buf;
               else if(p && p->ufnm) s = p->ufnm;
               else s="";
               b_char(s,a->inname,a->innamlen);
       }
       if(a->inacc && p)
       {
               if(p->url) s = "direct";
               else    s = "sequential";
               b_char(s,a->inacc,a->inacclen);
       }
       if(a->inseq)
       {
               s= ((byfile && !p) || (p && !p->url))? "yes" : "no";
               b_char(s,a->inseq,a->inseqlen);
       }
       if(a->indir)
       {
               s= ((byfile && !p) || (p && p->useek && p->url))? "yes" : "no";
               b_char(s,a->indir,a->indirlen);
       }
       if(a->inform)
       {       if(p)
               {
#ifndef KOSHER
                       if(p->uprnt) s = "print"; /*** NOT STANDARD FORTRAN ***/
                       else
#endif
                               s = p->ufmt?"formatted":"unformatted";
               }
               else s = "unknown";
               b_char(s,a->inform,a->informlen);
       }
       if(a->infmt)
       {
               if (p) s= p->ufmt? "yes" : "no";
               else s= "unknown";
               b_char(s,a->infmt,a->infmtlen);
       }
       if(a->inunf)
       {
               if (p) s= p->ufmt? "no" : "yes";
               else s= "unknown";
               b_char(s,a->inunf,a->inunflen);
       }
       if(a->inrecl && p) *a->inrecl=p->url;
       if(a->innrec && p && p->url)
               *a->innrec=(ftell(p->ufd)/p->url)+1;
       if(a->inblank && p && p->ufmt)
       {
               b_char(p->ublnk? "zero" : "blank",a->inblank,a->inblanklen);
       }
       return(OK);
}