src/search/lib.c

   1 /*
   2    Search text engine.
   3    Common share code for module.
   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
  31 #include "../src/global.h"
  32 #include "../src/search/search.h"
  33 #include "../src/search/internal.h"
  34 #include "../src/strutil.h"
  35 #include "../src/charsets.h"
  36
  37 /*** global variables ****************************************************************************/
  38
  39 char STR_E_NOTFOUND[] = N_(" Search string not found ");
  40 char STR_E_UNKNOWN_TYPE[] = N_(" Not implemented yet ");
  41 char STR_E_RPL_NOT_EQ_TO_FOUND[] = N_(" Num of replace tokens not equal to num of found tokens ");
  42 char STR_E_RPL_INVALID_TOKEN[] = N_(" Invalid token number %d ");
  43
  44 /*** file scope macro definitions ****************************************************************/
  45
  46 /*** file scope type declarations ****************************************************************/
  47
  48 /*** file scope variables ************************************************************************/
  49
  50 /*** file scope functions ************************************************************************/
  51
  52 /*** public functions ****************************************************************************/
  53
  54 gchar *
  55 mc_search__recode_str (const char *str, gsize str_len,
  56                        const char *charset_from, const char *charset_to, gsize * bytes_written)
  57 {
  58     gchar *ret;
  59     gsize bytes_read;
  60     GIConv conv;
  61
  62
  63     if (!strcmp (charset_to, charset_from)) {
  64         *bytes_written = str_len;
  65         return g_strndup (str, str_len);
  66     }
  67
  68     conv = g_iconv_open (charset_to, charset_from);
  69     if (conv == INVALID_CONV)
  70         return NULL;
  71
  72     ret = g_convert_with_iconv (str, str_len, conv, &bytes_read, bytes_written, NULL);
  73     g_iconv_close (conv);
  74     return ret;
  75 }
  76
  77 /* --------------------------------------------------------------------------------------------- */
  78
  79 gchar *
  80 mc_search__get_one_symbol (const char *charset, const char *str, gsize str_len,
  81                            gboolean * just_letters)
  82 {
  83
  84     gchar *converted_str, *next_char;
  85
  86     gsize tmp_len;
  87 #ifdef HAVE_CHARSET
  88     gsize converted_str_len;
  89     gchar *converted_str2;
  90
  91     converted_str = mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
  92 #else
  93     converted_str = g_strndup(str, str_len);
  94 #endif
  95
  96     next_char = (char *) str_cget_next_char (converted_str);
  97
  98     tmp_len = next_char - converted_str;
  99
 100     converted_str[tmp_len] = '\0';
 101
 102 #ifdef HAVE_CHARSET
 103     converted_str2 =
 104         mc_search__recode_str (converted_str, tmp_len, cp_display, charset, &converted_str_len);
 105 #endif
 106
 107     if (str_isalnum (converted_str) && !str_isdigit (converted_str))
 108         *just_letters = TRUE;
 109     else
 110         *just_letters = FALSE;
 111
 112
 113 #ifdef HAVE_CHARSET
 114     g_free (converted_str);
 115     return converted_str2;
 116 #else
 117     return converted_str;
 118 #endif
 119 }
 120
 121 /* --------------------------------------------------------------------------------------------- */
 122 int
 123 mc_search__get_char (mc_search_t * mc_search, const void *user_data, gsize current_pos)
 124 {
 125     char *data;
 126     if (mc_search->search_fn)
 127         return (mc_search->search_fn) (user_data, current_pos);
 128
 129     data = (char *) user_data;
 130     return (int) (unsigned char) data[current_pos];
 131 }
 132
 133 /* --------------------------------------------------------------------------------------------- */
 134
 135
 136 GString *
 137 mc_search__tolower_case_str (const char *charset, const char *str, gsize str_len)
 138 {
 139     GString *ret;
 140 #ifdef HAVE_CHARSET
 141     gchar *converted_str, *tmp_str1, *tmp_str2, *tmp_str3;
 142     gsize converted_str_len;
 143     gsize tmp_len;
 144
 145     tmp_str2 = converted_str =
 146         mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
 147     if (converted_str == NULL)
 148         return NULL;
 149
 150     tmp_len = converted_str_len + 1;
 151
 152     tmp_str3 = tmp_str1 = g_strdup (converted_str);
 153
 154     while (str_tolower (tmp_str1, &tmp_str2, &tmp_len))
 155         tmp_str1 += str_length_char (tmp_str1);
 156
 157     g_free (tmp_str3);
 158     tmp_str2 =
 159         mc_search__recode_str (converted_str, converted_str_len, cp_display, charset, &tmp_len);
 160     g_free (converted_str);
 161     if (tmp_str2 == NULL)
 162         return NULL;
 163
 164     ret = g_string_new_len (tmp_str2, tmp_len);
 165     g_free(tmp_str2);
 166     return ret;
 167 #else
 168     const gchar *tmp_str1 = str;
 169     gchar *converted_str, *tmp_str2;
 170     gsize converted_str_len = str_len+1;
 171
 172     tmp_str2 = converted_str = g_strndup(str, str_len);
 173
 174     while (str_tolower (tmp_str1, &tmp_str2, &converted_str_len))
 175         tmp_str1 += str_length_char (tmp_str1);
 176
 177     ret = g_string_new_len (converted_str, str_len);
 178     g_free(converted_str);
 179     return ret;
 180 #endif
 181 }
 182
 183 /* --------------------------------------------------------------------------------------------- */
 184
 185 GString *
 186 mc_search__toupper_case_str (const char *charset, const char *str, gsize str_len)
 187 {
 188     GString *ret;
 189 #ifdef HAVE_CHARSET
 190     gchar *converted_str, *tmp_str1, *tmp_str2, *tmp_str3;
 191     gsize converted_str_len;
 192     gsize tmp_len;
 193
 194     tmp_str2 = converted_str =
 195         mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
 196     if (converted_str == NULL)
 197         return NULL;
 198
 199     tmp_len = converted_str_len + 1;
 200
 201     tmp_str3 = tmp_str1 = g_strdup (converted_str);
 202
 203     while (str_toupper (tmp_str1, &tmp_str2, &tmp_len))
 204         tmp_str1 += str_length_char (tmp_str1);
 205
 206     g_free (tmp_str3);
 207
 208     tmp_str2 =
 209         mc_search__recode_str (converted_str, converted_str_len, cp_display, charset, &tmp_len);
 210     g_free (converted_str);
 211     if (tmp_str2 == NULL)
 212         return NULL;
 213
 214     ret = g_string_new_len (tmp_str2, tmp_len);
 215     g_free(tmp_str2);
 216     return ret;
 217 #else
 218     const gchar *tmp_str1 = str;
 219     gchar *converted_str, *tmp_str2;
 220     gsize converted_str_len = str_len+1;
 221
 222     tmp_str2 = converted_str = g_strndup(str, str_len);
 223
 224     while (str_toupper (tmp_str1, &tmp_str2, &converted_str_len))
 225         tmp_str1 += str_length_char (tmp_str1);
 226
 227     ret = g_string_new_len (converted_str, str_len);
 228     g_free(converted_str);
 229     return ret;
 230 #endif
 231 }
 232
 233 /* --------------------------------------------------------------------------------------------- */
 234
 235 gboolean
 236 mc_search__regex_is_char_escaped (const char *start, const char *current)
 237 {
 238     int num_esc = 0;
 239     while (*current == '\\' && current >= start) {
 240         num_esc++;
 241         current--;
 242     }
 243     return (gboolean) num_esc % 2;
 244 }
 245
 246 /* --------------------------------------------------------------------------------------------- */
 247
 248 gchar **
 249 mc_search_get_types_strings_array (void)
 250 {
 251     GString *tmp;
 252     gchar **ret;
 253     const mc_search_type_str_t *type_str;
 254     const mc_search_type_str_t *types_str = mc_search_types_list_get ();
 255
 256     tmp = g_string_new ("");
 257     type_str = types_str;
 258     while (type_str->str) {
 259         if (tmp->len)
 260             g_string_append (tmp, "__||__");
 261         g_string_append (tmp, type_str->str);
 262         type_str++;
 263     }
 264     ret = g_strsplit (tmp->str, "__||__", -1);
 265     g_string_free (tmp, TRUE);
 266     return ret;
 267 }