projects / bison.git / blame
| Commit | Line | Data |
|---|---|---|
| 22312b71 AD |
1 | /* basename.c -- return the last element in a path |
| 2 | Copyright (C) 1990, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This program is free software; you can redistribute it and/or modify | |
| 5 | it under the terms of the GNU General Public License as published by | |
| 6 | the Free Software Foundation; either version 2, or (at your option) | |
| 7 | any later version. | |
| 8 | ||
| 9 | This program is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | GNU General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU General Public License | |
| 15 | along with this program; if not, write to the Free Software Foundation, | |
| 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
| 17 | ||
| 18 | #if HAVE_CONFIG_H | |
| 19 | # include <config.h> | |
| 20 | #endif | |
| 21 | ||
| 22 | #include <stdio.h> | |
| 23 | #include <assert.h> | |
| 24 | ||
| 25 | #ifndef FILESYSTEM_PREFIX_LEN | |
| 26 | # define FILESYSTEM_PREFIX_LEN(Filename) 0 | |
| 27 | #endif | |
| 28 | ||
| 29 | #ifndef PARAMS | |
| 30 | # if defined PROTOTYPES || (defined __STDC__ && __STDC__) | |
| 31 | # define PARAMS(Args) Args | |
| 32 | # else | |
| 33 | # define PARAMS(Args) () | |
| 34 | # endif | |
| 35 | #endif | |
| 36 | ||
| 37 | #ifndef ISSLASH | |
| 38 | # define ISSLASH(C) ((C) == '/') | |
| 39 | #endif | |
| 40 | ||
| 41 | char *base_name PARAMS ((char const *name)); | |
| 42 | ||
| 43 | /* In general, we can't use the builtin `basename' function if available, | |
| 44 | since it has different meanings in different environments. | |
| 45 | In some environments the builtin `basename' modifies its argument. | |
| 46 | If NAME is all slashes, be sure to return `/'. */ | |
| 47 | ||
| 48 | char * | |
| 49 | base_name (char const *name) | |
| 50 | { | |
| 51 | char const *base = name += FILESYSTEM_PREFIX_LEN (name); | |
| 52 | int all_slashes = 1; | |
| 53 | char const *p; | |
| 54 | ||
| 55 | for (p = name; *p; p++) | |
| 56 | { | |
| 57 | if (ISSLASH (*p)) | |
| 58 | base = p + 1; | |
| 59 | else | |
| 60 | all_slashes = 0; | |
| 61 | } | |
| 62 | ||
| 63 | /* If NAME is all slashes, arrange to return `/'. */ | |
| 64 | if (*base == '\0' && ISSLASH (*name) && all_slashes) | |
| 65 | --base; | |
| 66 | ||
| 67 | /* Make sure the last byte is not a slash. */ | |
| 68 | assert (all_slashes || !ISSLASH (*(p - 1))); | |
| 69 | ||
| 70 | return (char *) base; | |
| 71 | } |