/* dirname.c -- return all but the last element in a path
   Copyright (C) 1990 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "c-auto.h"
#ifdef HAVE_CONFIG_H
#if defined (CONFIG_BROKETS)
/* We use <config.h> instead of "config.h" so that a compilation
   using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
   (which it would do because it found this file in $srcdir).  */
#include <config.h>
#else
#include "config.h"
#endif
#endif

#ifdef STDC_HEADERS
#include <stdlib.h>
#else
char *malloc ();
#endif
#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
#include <string.h>
#ifndef rindex
#define rindex strrchr
#endif
#else
#include <strings.h>
#endif

void
strip_trailing_slashes (path)
     char *path;
{
  int last;

  last = strlen (path) - 1;
  while (last > 0 && path[last] == '/')
    path[last--] = '\0';
}

/* Return the leading directories part of PATH,
   allocated with malloc.  If out of memory, return 0.
   Assumes that trailing slashes have already been
   removed.  */

char *
dir_name (path)
     char *path;
{
  char *newpath;
  char *slash;
  int length;                   /* Length of result, not including NUL.  */

  strip_trailing_slashes(path);
  slash = rindex (path, '/');
  if (slash == 0)
    {
      /* File is in the current directory.  */
      path = ".";
      length = 1;
    }
  else
    {
      /* Remove any trailing slashes from the result.  */
      while (slash > path && *slash == '/')
        --slash;

      length = slash - path + 1;
    }
  newpath = malloc (length + 1);
  if (newpath == 0)
    return 0;
  strncpy (newpath, path, length);
  newpath[length] = 0;
  return newpath;
}

char *
base_name (name)
     char *name;
{
  char *base;

  base = rindex (name, '/');
  return base ? base + 1 : name;
}
