lib/search/normal.c

   1 /*
   2    Search text engine.
   3    Plain search
   4
   5    Copyright (C) 2009 The Free Software Foundation, Inc.
   6
   7    Written by:
   8    Slava Zanko <slavazanko@gmail.com>, 2009.
   9
  10    This file is part of the Midnight Commander.
  11
  12    The Midnight Commander is free software; you can redistribute it
  13    and/or modify it under the terms of the GNU General Public License as
  14    published by the Free Software Foundation; either version 2 of the
  15    License, or (at your option) any later version.
  16
  17    The Midnight Commander is distributed in the hope that it will be
  18    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  19    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20    General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  25    MA 02110-1301, USA.
  26  */
  27
  28 #include <config.h>
  29
  30 #include "lib/global.h"
  31 #include "lib/strutil.h"
  32 #include "lib/search.h"
  33
  34 #include "lib/charsets.h"
  35
  36 #include "internal.h"
  37
  38 /*** global variables ****************************************************************************/
  39
  40 /*** file scope macro definitions ****************************************************************/
  41
  42 /*** file scope type declarations ****************************************************************/
  43
  44 /*** file scope variables ************************************************************************/
  45
  46 /*** file scope functions ************************************************************************/
  47
  48 static GString *
  49 mc_search__normal_translate_to_regex (const GString * astr)
  50 {
  51     const char *str = astr->str;
  52     GString *buff;
  53     gsize loop;
  54
  55     buff = g_string_sized_new (32);
  56
  57     for (loop = 0; loop < astr->len; loop++)
  58         switch (str[loop])
  59         {
  60         case '*':
  61         case '?':
  62         case ',':
  63         case '{':
  64         case '}':
  65         case '[':
  66         case ']':
  67         case '\\':
  68         case '+':
  69         case '.':
  70         case '$':
  71         case '(':
  72         case ')':
  73         case '^':
  74         case '-':
  75         case '|':
  76             g_string_append_c (buff, '\\');
  77             /* fall through */
  78         default:
  79             g_string_append_c (buff, str[loop]);
  80             break;
  81         }
  82
  83     return buff;
  84 }
  85
  86 /*** public functions ****************************************************************************/
  87
  88 void
  89 mc_search__cond_struct_new_init_normal (const char *charset, mc_search_t * lc_mc_search,
  90                                         mc_search_cond_t * mc_search_cond)
  91 {
  92     GString *tmp;
  93
  94     tmp = mc_search__normal_translate_to_regex (mc_search_cond->str);
  95     g_string_free (mc_search_cond->str, TRUE);
  96
  97     if (lc_mc_search->whole_words)
  98     {
  99         /* NOTE: \b as word boundary doesn't allow search
 100          * whole words with non-ASCII symbols */
 101         g_string_prepend (tmp, "(^|[^\\p{L}\\p{N}_])(");
 102         g_string_append (tmp, ")([^\\p{L}\\p{N}_]|$)");
 103     }
 104
 105     mc_search_cond->str = tmp;
 106     mc_search__cond_struct_new_init_regex (charset, lc_mc_search, mc_search_cond);
 107 }
 108
 109 /* --------------------------------------------------------------------------------------------- */
 110
 111 gboolean
 112 mc_search__run_normal (mc_search_t * lc_mc_search, const void *user_data,
 113                        gsize start_search, gsize end_search, gsize * found_len)
 114 {
 115     return mc_search__run_regex (lc_mc_search, user_data, start_search, end_search, found_len);
 116 }
 117
 118 /* --------------------------------------------------------------------------------------------- */
 119 GString *
 120 mc_search_normal_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
 121 {
 122     (void) lc_mc_search;
 123     return g_string_new_len (replace_str->str, replace_str->len);
 124 }