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 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 * 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 * 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 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