str/str_path_basename.c

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00001 // Copyright (C) 2006-2007 Benedikt Böhm <hollow@gentoo.org>
00002 //
00003 // This program is free software; you can redistribute it and/or
00004 // modify it under the terms of the GNU General Public License
00005 // as published by the Free Software Foundation; either version 2
00006 // of the License, or (at your option) any later version.
00007 //
00008 // This program is distributed in the hope that it will be useful,
00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00011 // GNU General Public License for more details.
00012 //
00013 // You should have received a copy of the GNU General Public License
00014 // along with this program; if not, write to the Free Software
00015 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
00016 
00017 #include "mem.h"
00018 #include "str.h"
00019 
00020 char *str_path_basename(const char *path)
00021 {
00022         /* empty string */
00023         if (str_isempty(path))
00024                 return str_dup(".");
00025 
00026         /* skip prefixing '/' */
00027         while (*path && *path == '/')
00028                 path++;
00029 
00030         /* string consisting entirely of '/' */
00031         if (!*path)
00032                 return str_dup("/");
00033 
00034         char *p, *buf = str_dup(path);
00035 
00036         while ((p = str_rchr(buf, '/', str_len(buf)))) {
00037                 /* remove trailing lash */
00038                 if (p[1] == 0 && p != buf)
00039                         *p = 0;
00040 
00041                 /* no trailing slash anymore */
00042                 else
00043                         break;
00044         }
00045 
00046         char *bn;
00047 
00048         /* if a non-trailing slash was found, return everything after it */
00049         if (p)
00050                 bn = str_dup(p + 1);
00051 
00052         /* otherwise buf already contains basename */
00053         else
00054                 bn = str_dup(buf);
00055 
00056         mem_free(buf);
00057 
00058         return bn;
00059 }

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