1/* Return the name-within-directory of a file name. 2 Copyright (C) 1996-1999, 2000-2002, 2004, 2006 Free Software Foundation, Inc. 3 4 NOTE: The canonical source of this file is maintained with the GNU C Library. 5 Bugs can be reported to bug-glibc@gnu.org. 6 7 This program is free software: you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published by the 9 Free Software Foundation; either version 3 of the License, or any 10 later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20#include <config.h> 21 22/* Specification. */ 23#include "basename.h" 24 25#if !(__GLIBC__ >= 2) 26 27#include <stdio.h> 28#include <assert.h> 29 30#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__ 31 /* Win32, Cygwin, OS/2, DOS */ 32# define HAS_DEVICE(P) \ 33 ((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \ 34 && (P)[1] == ':') 35# define FILE_SYSTEM_PREFIX_LEN(P) (HAS_DEVICE (P) ? 2 : 0) 36# define ISSLASH(C) ((C) == '/' || (C) == '\\') 37#endif 38 39#ifndef FILE_SYSTEM_PREFIX_LEN 40# define FILE_SYSTEM_PREFIX_LEN(Filename) 0 41#endif 42 43#ifndef ISSLASH 44# define ISSLASH(C) ((C) == '/') 45#endif 46 47#ifndef _LIBC 48/* We cannot generally use the name `basename' since XPG defines an unusable 49 variant of the function but we cannot use it. */ 50# undef basename 51# define basename gnu_basename 52#endif 53 54/* In general, we can't use the builtin `basename' function if available, 55 since it has different meanings in different environments. 56 In some environments the builtin `basename' modifies its argument. 57 If NAME is all slashes, be sure to return `/'. */ 58 59char * 60basename (char const *name) 61{ 62 char const *base = name += FILE_SYSTEM_PREFIX_LEN (name); 63 int all_slashes = 1; 64 char const *p; 65 66 for (p = name; *p; p++) 67 { 68 if (ISSLASH (*p)) 69 base = p + 1; 70 else 71 all_slashes = 0; 72 } 73 74 /* If NAME is all slashes, arrange to return `/'. */ 75 if (*base == '\0' && ISSLASH (*name) && all_slashes) 76 --base; 77 78 /* Make sure the last byte is not a slash. */ 79 assert (all_slashes || !ISSLASH (*(p - 1))); 80 81 return (char *) base; 82} 83 84#endif 85