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1/* Take file names apart into directory and base names.
2
3 Copyright (C) 1998, 2001, 2003-2006 Free Software Foundation, Inc.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
8 any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18
19#ifndef DIRNAME_H_
20# define DIRNAME_H_ 1
21
22# include <stdbool.h>
23# include <stddef.h>
24
25# ifndef DIRECTORY_SEPARATOR
26# define DIRECTORY_SEPARATOR '/'
27# endif
28
29# ifndef ISSLASH
30# define ISSLASH(C) ((C) == DIRECTORY_SEPARATOR)
31# endif
32
33# ifndef FILE_SYSTEM_PREFIX_LEN
34# if FILE_SYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX
35 /* This internal macro assumes ASCII, but all hosts that support drive
36 letters use ASCII. */
37# define _IS_DRIVE_LETTER(c) (((unsigned int) (c) | ('a' - 'A')) - 'a' \
38 <= 'z' - 'a')
39# define FILE_SYSTEM_PREFIX_LEN(Filename) \
40 (_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':' ? 2 : 0)
41# else
42# define FILE_SYSTEM_PREFIX_LEN(Filename) 0
43# endif
44# endif
45
46# ifndef FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
47# define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
48# endif
49
50# ifndef DOUBLE_SLASH_IS_DISTINCT_ROOT
51# define DOUBLE_SLASH_IS_DISTINCT_ROOT 0
52# endif
53
54# if FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
55# define IS_ABSOLUTE_FILE_NAME(F) ISSLASH ((F)[FILE_SYSTEM_PREFIX_LEN (F)])
56# else
57# define IS_ABSOLUTE_FILE_NAME(F) \
58 (ISSLASH ((F)[0]) || 0 < FILE_SYSTEM_PREFIX_LEN (F))
59# endif
60# define IS_RELATIVE_FILE_NAME(F) (! IS_ABSOLUTE_FILE_NAME (F))
61
62char *base_name (char const *file);
63char *dir_name (char const *file);
64size_t base_len (char const *file);
65size_t dir_len (char const *file);
66char *last_component (char const *file);
67
68bool strip_trailing_slashes (char *file);
69
70#endif /* not DIRNAME_H_ */