gcc/libf2c/libI77/inquire.c

#include "config.h"
#include "f2c.h"
#include "fio.h"
#include <string.h>
#if defined (MSDOS) && !defined (GO32)
#undef abs
#undef min
#undef max
#include "io.h"
#endif
integer
f_inqu (inlist * a)
{
  flag byfile;
  int i, n;
  unit *p;
  char buf[256];
  long x;
  if (f__init & 2)
    f__fatal (131, "I/O recursion");
  if (a->infile != NULL)
    {
      byfile = 1;
      g_char (a->infile, a->infilen, buf);
#ifdef NON_UNIX_STDIO
      x = access (buf, 0) ? -1 : 0;
      for (i = 0, p = NULL; i < MXUNIT; i++)
	if (f__units[i].ufd != NULL
	    && f__units[i].ufnm != NULL && !strcmp (f__units[i].ufnm, buf))
	  {
	    p = &f__units[i];
	    break;
	  }
#else
      x = f__inode (buf, &n);
      for (i = 0, p = NULL; i < MXUNIT; i++)
	if (f__units[i].uinode == x
	    && f__units[i].ufd != NULL && f__units[i].udev == n)
	  {
	    p = &f__units[i];
	    break;
	  }
#endif
    }
  else
    {
      byfile = 0;
      if (a->inunit < MXUNIT && a->inunit >= 0)
	{
	  p = &f__units[a->inunit];
	}
      else
	{
	  p = NULL;
	}
    }
  if (a->inex != NULL)
    {
      if ((byfile && x != -1) || (!byfile && p != NULL))
	*a->inex = 1;
      else
	*a->inex = 0;
    }
  if (a->inopen != NULL)
    {
      if (byfile)
	*a->inopen = (p != NULL);
      else
	*a->inopen = (p != NULL && p->ufd != NULL);
    }
  if (a->innum != NULL)
    *a->innum = p - f__units;
  if (a->innamed != NULL)
    {
      if (byfile || (p != NULL && p->ufnm != NULL))
	*a->innamed = 1;
      else
	*a->innamed = 0;
    }
  if (a->inname != NULL)
    {
      if (byfile)
	b_char (buf, a->inname, a->innamlen);
      else if (p != NULL && p->ufnm != NULL)
	b_char (p->ufnm, a->inname, a->innamlen);
    }
  if (a->inacc != NULL && p != NULL && p->ufd != NULL)
    {
      if (p->url)
	b_char ("DIRECT", a->inacc, a->inacclen);
      else
	b_char ("SEQUENTIAL", a->inacc, a->inacclen);
    }
  if (a->inseq != NULL)
    {
      if (p != NULL && p->url)
	b_char ("NO", a->inseq, a->inseqlen);
      else
	b_char ("YES", a->inseq, a->inseqlen);
    }
  if (a->indir != NULL)
    {
      if (p == NULL || p->url)
	b_char ("YES", a->indir, a->indirlen);
      else
	b_char ("NO", a->indir, a->indirlen);
    }
  if (a->infmt != NULL)
    {
      if (p != NULL && p->ufmt == 0)
	b_char ("UNFORMATTED", a->infmt, a->infmtlen);
      else
	b_char ("FORMATTED", a->infmt, a->infmtlen);
    }
  if (a->inform != NULL)
    {
      if (p != NULL && p->ufmt == 0)
	b_char ("NO", a->inform, a->informlen);
      else
	b_char ("YES", a->inform, a->informlen);
    }
  if (a->inunf)
    {
      if (p != NULL && p->ufmt == 0)
	b_char ("YES", a->inunf, a->inunflen);
      else if (p != NULL)
	b_char ("NO", a->inunf, a->inunflen);
      else
	b_char ("UNKNOWN", a->inunf, a->inunflen);
    }
  if (a->inrecl != NULL && p != NULL)
    *a->inrecl = p->url;
  if (a->innrec != NULL && p != NULL && p->url > 0)
    *a->innrec = FTELL (p->ufd) / p->url + 1;
  if (a->inblank && p != NULL && p->ufmt)
    {
      if (p->ublnk)
	b_char ("ZERO", a->inblank, a->inblanklen);
      else
	b_char ("NULL", a->inblank, a->inblanklen);
    }
  return (0);
}