source/texk/kpathsea/make-suffix.c

   1 /* make-suffix.c: unconditionally add a filename suffix.
   2
   3    Copyright 1992, 1993, 1995, 2008, 2011 Karl Berry.
   4    Copyright 2001, 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 #include <kpathsea/config.h>
  20 #include <kpathsea/c-pathch.h>
  21
  22 /* Return a new string: S suffixed with SUFFIX, regardless of what it
  23    was before. This returns a newly allocated string.  */
  24
  25 string
  26 make_suffix (const_string s,  const_string suffix)
  27 {
  28   string new_s;
  29   const_string dot_pos = strrchr (s, '.');
  30   const_string p;
  31 #if defined(WIN32)
  32   string q;
  33 #endif
  34
  35   if (dot_pos)
  36     for (p = dot_pos + 1; *p; p++) {
  37       if (IS_DIR_SEP (*p)) {
  38         dot_pos = NULL;
  39         break;
  40       }
  41 #if defined(WIN32)
  42       else if (IS_KANJI(p))
  43         p++;
  44 #endif
  45     }
  46
  47   if (dot_pos == NULL)
  48     new_s = concat3 (s, ".", suffix);
  49   else
  50     {
  51       unsigned past_dot_index = dot_pos + 1 - s;
  52
  53       new_s = (string)xmalloc (past_dot_index + strlen (suffix) + 1);
  54       strncpy (new_s, s, past_dot_index);
  55       strcpy (new_s + past_dot_index, suffix);
  56     }
  57
  58 #if defined(WIN32)
  59   for (q = new_s; *q; q++) {
  60     if (*q == '\\')
  61       *q = '/';
  62     else if (IS_KANJI(q))
  63       q++;
  64   }
  65 #endif
  66
  67   return new_s;
  68 }