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- /* dir.c: directory operations.
-
- Copyright (C) 1992, 93, 94 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 <kpathsea/config.h>
-
- #include <kpathsea/c-dir.h>
- #include <kpathsea/c-stat.h>
- #include <kpathsea/hash.h>
-
-
- /* Return true if FN is a directory or a symlink to a directory,
- false if not. */
-
- boolean
- dir_p P1C(const_string, fn)
- {
- struct stat stats;
- return stat (fn, &stats) == 0 && S_ISDIR (stats.st_mode);
- }
-
-
- /* Return -1 if FN isn't a directory, else its number of links.
- Duplicate the call to stat; no need to incur overhead of a function
- call for that little bit of cleanliness. */
-
- int
- dir_links P1C(const_string, fn)
- {
- static hash_table_type link_table;
- string *hash_ret;
- long ret;
-
- if (link_table.size == 0)
- link_table = hash_create (457);
-
- #ifdef DEBUG
- /* This is annoying, but since we're storing integers as pointers, we
- can't print them as strings. */
- if (KPSE_DEBUG_P (KPSE_DEBUG_HASH))
- kpse_debug_hash_lookup_int = true;
- #endif
-
- hash_ret = hash_lookup (link_table, fn);
-
- #ifdef DEBUG
- if (KPSE_DEBUG_P (KPSE_DEBUG_HASH))
- kpse_debug_hash_lookup_int = false;
- #endif
-
- /* Have to cast the int we need to/from the const_string that the hash
- table stores for values. Let's hope an int fits in a pointer. */
- if (hash_ret)
- ret = (long) *hash_ret;
- else
- {
- struct stat stats;
- ret = stat (fn, &stats) == 0 && S_ISDIR (stats.st_mode)
- ? stats.st_nlink : -1;
-
- /* It's up to us to copy the value. */
- hash_insert (&link_table, xstrdup (fn), (const_string) ret);
-
- #ifdef DEBUG
- if (KPSE_DEBUG_P (KPSE_DEBUG_STAT))
- DEBUGF2 ("dir_links(%s) => %ld\n", fn, ret);
- #endif
- }
-
- return ret;
- }
-