str/str_path_isabs.c

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00001 // Copyright 2006 Benedikt Böhm <hollow@gentoo.org>
00002 //
00003 // This program is free software; you can redistribute it and/or modify
00004 // it under the terms of the GNU General Public License as published by
00005 // the Free Software Foundation; either version 2 of the License, or
00006 // (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
00015 // Free Software Foundation, Inc.,
00016 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00017 
00018 #include <stdlib.h>
00019 
00020 #include "str.h"
00021 
00022 int str_path_isabs(const char *str)
00023 {
00024         char *buf, *p, *o;
00025         
00026         if (str_isempty(str))
00027                 return 0;
00028         
00029         if (*str != '/')
00030                 return 0;
00031         
00032         if (str_path_isdot(str))
00033                 return 0;
00034         
00035         buf = p = o = str_dup(str);
00036         
00037         while (1) {
00038                 p = str_index(p, '/', str_len(p));
00039                 
00040                 if (p)
00041                         *p++ = '\0';
00042                 
00043                 if (!str_isgraph(o)) {
00044                         free(buf);
00045                         return 0;
00046                 }
00047                 
00048                 if (!p)
00049                         break;
00050                 else
00051                         o = p;
00052         }
00053         
00054         free(buf);
00055         return 1;
00056 }

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