1 /* Extract the last component (base name) of a file name. 2 3 Copyright (C) 1998, 2001, 2003-2006, 2009-2021 Free Software Foundation, 4 Inc. 5 6 This program is free software: you can redistribute it and/or modify 7 it under the terms of the GNU Lesser General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) 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 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public License 17 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 18 19 #ifndef _BASENAME_LGPL_H 20 #define _BASENAME_LGPL_H 21 22 #include <stddef.h> 23 24 #ifndef DOUBLE_SLASH_IS_DISTINCT_ROOT 25 # define DOUBLE_SLASH_IS_DISTINCT_ROOT 0 26 #endif 27 28 #ifdef __cplusplus 29 extern "C" { 30 #endif 31 32 33 /* Return the address of the last file name component of FILENAME. 34 If FILENAME has some trailing slash(es), they are considered to be 35 part of the last component. 36 If FILENAME has no relative file name components because it is a file 37 system root, return the empty string. 38 Examples: 39 FILENAME RESULT 40 "foo.c" "foo.c" 41 "foo/bar.c" "bar.c" 42 "/foo/bar.c" "bar.c" 43 "foo/bar/" "bar/" 44 "foo/bar//" "bar//" 45 "/" "" 46 "//" "" 47 "" "" 48 The return value is a tail of the given FILENAME; do NOT free() it! */ 49 50 /* This function was traditionally called 'basename', but we avoid this 51 function name because 52 * Various platforms have different functions in their libc. 53 In particular, the glibc basename(), defined in <string.h>, does 54 not consider trailing slashes to be part of the component: 55 FILENAME RESULT 56 "foo/bar/" "" 57 "foo/bar//" "" 58 * The 'basename' command eliminates trailing slashes and for a root 59 produces a non-empty result: 60 FILENAME RESULT 61 "foo/bar/" "bar" 62 "foo/bar//" "bar" 63 "/" "/" 64 "//" "/" 65 */ 66 extern char *last_component (char const *filename) _GL_ATTRIBUTE_PURE; 67 68 /* Return the length of the basename FILENAME. 69 Typically FILENAME is the value returned by base_name or last_component. 70 Act like strlen (FILENAME), except omit all trailing slashes. */ 71 extern size_t base_len (char const *filename) _GL_ATTRIBUTE_PURE; 72 73 74 #ifdef __cplusplus 75 } /* extern "C" */ 76 #endif 77 78 #endif /* _BASENAME_LGPL_H */ 79