lib/search/normal.c

   1 /*
   2    Search text engine.
   3    Plain search
   4
   5    Copyright (C) 2009, 2011
   6    The Free Software Foundation, Inc.
   7
   8    Written by:
   9    Slava Zanko <slavazanko@gmail.com>, 2009.
  10
  11    This file is part of the Midnight Commander.
  12
  13    The Midnight Commander is free software: you can redistribute it
  14    and/or modify it under the terms of the GNU General Public License as
  15    published by the Free Software Foundation, either version 3 of the License,
  16    or (at your option) any later version.
  17
  18    The Midnight Commander is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27 #include <config.h>
  28
  29 #include "lib/global.h"
  30 #include "lib/strutil.h"
  31 #include "lib/search.h"
  32
  33 #include "lib/charsets.h"
  34
  35 #include "internal.h"
  36
  37 /*** global variables ****************************************************************************/
  38
  39 /*** file scope macro definitions ****************************************************************/
  40
  41 /*** file scope type declarations ****************************************************************/
  42
  43 /*** file scope variables ************************************************************************/
  44
  45 /*** file scope functions ************************************************************************/
  46
  47 static GString *
  48 mc_search__normal_translate_to_regex (const GString * astr)
  49 {
  50     const char *str = astr->str;
  51     GString *buff;
  52     gsize loop;
  53
  54     buff = g_string_sized_new (32);
  55
  56     for (loop = 0; loop < astr->len; loop++)
  57         switch (str[loop])
  58         {
  59         case '*':
  60         case '?':
  61         case ',':
  62         case '{':
  63         case '}':
  64         case '[':
  65         case ']':
  66         case '\\':
  67         case '+':
  68         case '.':
  69         case '$':
  70         case '(':
  71         case ')':
  72         case '^':
  73         case '-':
  74         case '|':
  75             g_string_append_c (buff, '\\');
  76             /* fall through */
  77         default:
  78             g_string_append_c (buff, str[loop]);
  79             break;
  80         }
  81
  82     return buff;
  83 }
  84
  85 /*** public functions ****************************************************************************/
  86
  87 void
  88 mc_search__cond_struct_new_init_normal (const char *charset, mc_search_t * lc_mc_search,
  89                                         mc_search_cond_t * mc_search_cond)
  90 {
  91     GString *tmp;
  92
  93     tmp = mc_search__normal_translate_to_regex (mc_search_cond->str);
  94     g_string_free (mc_search_cond->str, TRUE);
  95
  96     if (lc_mc_search->whole_words)
  97     {
  98         /* NOTE: \b as word boundary doesn't allow search
  99          * whole words with non-ASCII symbols */
 100         g_string_prepend (tmp, "(^|[^\\p{L}\\p{N}_])(");
 101         g_string_append (tmp, ")([^\\p{L}\\p{N}_]|$)");
 102     }
 103
 104     mc_search_cond->str = tmp;
 105     mc_search__cond_struct_new_init_regex (charset, lc_mc_search, mc_search_cond);
 106 }
 107
 108 /* --------------------------------------------------------------------------------------------- */
 109
 110 gboolean
 111 mc_search__run_normal (mc_search_t * lc_mc_search, const void *user_data,
 112                        gsize start_search, gsize end_search, gsize * found_len)
 113 {
 114     return mc_search__run_regex (lc_mc_search, user_data, start_search, end_search, found_len);
 115 }
 116
 117 /* --------------------------------------------------------------------------------------------- */
 118 GString *
 119 mc_search_normal_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
 120 {
 121     (void) lc_mc_search;
 122     return g_string_new_len (replace_str->str, replace_str->len);
 123 }