1 /* GNU gettext - internationalization aids
2 Copyright (C) 1996, 1998, 2000-2002 Free Software Foundation, Inc.
3
4 This file was written by Peter Miller <millerp@canb.auug.org.au>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19
20
21 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 /* Specification. */
26 #include "dir-list.h"
27
28 #include <stddef.h>
29 #include <stdlib.h>
30
31 #include "str-list.h"
32
33 static string_list_ty *directory /* = NULL */;
34
35
36 /* Append a directory to the end of the list of directories. */
37 void
dir_list_append(const char * s)38 dir_list_append (const char *s)
39 {
40 if (directory == NULL)
41 directory = string_list_alloc ();
42 string_list_append_unique (directory, s);
43 }
44
45
46 /* Return the nth directory, or NULL of n is out of range. */
47 const char *
dir_list_nth(int n)48 dir_list_nth (int n)
49 {
50 /* The default value of the list consists of the single directory ".". */
51 if (directory == NULL)
52 dir_list_append (".");
53
54 if (n < 0 || n >= directory->nitems)
55 return NULL;
56 return directory->item[n];
57 }
58
59
60 /* Return the current list of directories, for later use with dir_list_restore.
61 Reset the list to empty. */
62 void *
dir_list_save_reset()63 dir_list_save_reset ()
64 {
65 void *saved_value = directory;
66
67 directory = NULL;
68 return saved_value;
69 }
70
71
72 /* Restore a previously saved list of directories. */
73 void
dir_list_restore(void * saved_value)74 dir_list_restore (void *saved_value)
75 {
76 /* Don't free the contained strings, because they may have been returned
77 by dir_list_nth and may still be in use. */
78 if (directory != NULL)
79 {
80 if (directory->item != NULL)
81 free (directory->item);
82 free (directory);
83 }
84
85 directory = saved_value;
86 }
87