src/match.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2017 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         GRegexCompileFlags compile_flags =
  41                 G_REGEX_CASELESS | G_REGEX_DOTALL | G_REGEX_OPTIMIZE;
  42         if (anchor)
  43                 compile_flags |= G_REGEX_ANCHORED;
  44
  45         char *src_folded = locale_casefold(src);
  46         GRegex *regex = g_regex_new ((const gchar*)src_folded, compile_flags,
  47                                      0, NULL);
  48
  49         g_free(src_folded);
  50
  51         return regex;
  52 }
  53
  54 bool
  55 match_regex(GRegex *regex, const char *line)
  56 {
  57         char *line_folded = locale_casefold(line);
  58         GMatchInfo *match_info;
  59         g_regex_match(regex, line_folded, 0, &match_info);
  60         bool match = (bool)g_match_info_matches(match_info);
  61
  62         g_match_info_free(match_info);
  63         g_free(line_folded);
  64
  65         return match;
  66 }
  67
  68 bool
  69 match_line(const char *line, const char *needle)
  70 {
  71         char *line_folded = locale_casefold(line);
  72         char *needle_folded = locale_casefold(needle);
  73
  74         bool ret = (bool)g_regex_match_simple((const gchar*)needle_folded,
  75                         (const gchar*)line_folded,
  76                         G_REGEX_CASELESS | G_REGEX_DOTALL | G_REGEX_OPTIMIZE,
  77                         0);
  78
  79         g_free(line_folded);
  80         g_free(needle_folded);
  81
  82         return ret;
  83 }