source/texk/kpathsea/xbasename.c

   1 /* xbasename.c: return the last element in a path.
   2
   3    Copyright 1992, 1994, 1995, 1996, 2008, 2011 Karl Berry.
   4    Copyright 2005 Olaf Weber.
   5
   6    This library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    This library 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 GNU
  14    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 library; if not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* Have to include this first to get c-auto.h.  */
  20 #include <kpathsea/config.h>
  21
  22 #include <kpathsea/c-pathch.h>
  23
  24 /* Return NAME with any leading path stripped off.  This returns a
  25    pointer into NAME.  For example, `basename ("/foo/bar.baz")'
  26    returns "bar.baz".  */
  27
  28 const_string
  29 xbasename (const_string name)
  30 {
  31     const_string base = name;
  32     const_string p;
  33
  34     if (NAME_BEGINS_WITH_DEVICE(name))
  35         base += 2;
  36
  37     else if (IS_UNC_NAME(name)) {
  38         unsigned limit;
  39
  40         for (limit = 2; name[limit] && !IS_DIR_SEP (name[limit]); limit++)
  41 #if defined(WIN32)
  42             if (IS_KANJI(name+limit)) limit++
  43 #endif
  44             ;
  45         if (name[limit++] && name[limit] && !IS_DIR_SEP (name[limit])) {
  46             for (; name[limit] && !IS_DIR_SEP (name[limit]); limit++)
  47 #if defined(WIN32)
  48                 if (IS_KANJI(name+limit)) limit++
  49 #endif
  50                 ;
  51         } else
  52             /* malformed UNC name, backup */
  53             limit = 0;
  54         base += limit;
  55     }
  56
  57     for (p = base; *p; p++) {
  58         if (IS_DIR_SEP(*p))
  59             base = p + 1;
  60 #if defined(WIN32)
  61         else if (IS_KANJI(p))
  62             p++;
  63 #endif
  64     }
  65
  66     return base;
  67 }