src/match.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2010 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "match.h"
  21 #include "charset.h"
  22
  23 #include <glib.h>
  24 #include <string.h>
  25 #include <ctype.h>
  26
  27 static char *
  28 locale_casefold(const char *src)
  29 {
  30         char *utf8 = locale_to_utf8(src);
  31         char *folded = g_utf8_casefold(utf8, -1);
  32
  33         g_free(utf8);
  34         return folded;
  35 }
  36
  37 GRegex *
  38 compile_regex(const char *src, bool anchor)
  39 {
  40         GRegex *regex;
  41         GRegexCompileFlags compile_flags;
  42         char *src_folded = locale_casefold(src);
  43
  44         compile_flags = G_REGEX_CASELESS | G_REGEX_DOTALL | G_REGEX_OPTIMIZE;
  45         if (anchor)
  46                 compile_flags |= G_REGEX_ANCHORED;
  47
  48         regex = g_regex_new ((const gchar*)src_folded, compile_flags, 0, NULL);
  49
  50         g_free(src_folded);
  51
  52         return regex;
  53 }
  54
  55 bool
  56 match_regex(GRegex *regex, const char *line)
  57 {
  58         GMatchInfo *match_info;
  59         bool match;
  60         char *line_folded = locale_casefold(line);
  61
  62         g_regex_match(regex, line_folded, 0, &match_info);
  63         match = (bool)g_match_info_matches(match_info);
  64
  65         g_match_info_free(match_info);
  66         g_free(line_folded);
  67
  68         return match;
  69 }
  70
  71 bool
  72 match_line(const char *line, const char *needle)
  73 {
  74         char *line_folded = locale_casefold(line);
  75         char *needle_folded = locale_casefold(needle);
  76
  77 #if GLIB_CHECK_VERSION(2,14,0)
  78         bool ret = (bool)g_regex_match_simple((const gchar*)needle_folded,
  79                         (const gchar*)line_folded,
  80                         G_REGEX_CASELESS | G_REGEX_DOTALL | G_REGEX_OPTIMIZE,
  81                         0);
  82 #else
  83         bool ret = strstr(line_folded, needle_folded) != NULL;
  84 #endif
  85
  86         g_free(line_folded);
  87         g_free(needle_folded);
  88
  89         return ret;
  90 }