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 #include <stdlib.h>
  31 #include <sys/types.h>
  32
  33 #include "../src/global.h"
  34 #include "../src/search/search.h"
  35 #include "../src/search/internal.h"
  36 #include "../src/strutil.h"
  37 #include "../src/charsets.h"
  38
  39 /*** global variables ****************************************************************************/
  40
  41 const char * STR_E_NOTFOUND = N_(" Search string not found ");
  42 const char * STR_E_UNKNOWN_TYPE = N_(" Not implemented yet ");
  43 const char * STR_E_RPL_NOT_EQ_TO_FOUND = N_(" Num of replace tokens not equal to num of found tokens ");
  44 const char * STR_E_RPL_INVALID_TOKEN = N_(" Invalid token number %d ");
  45
  46 /*** file scope macro definitions ****************************************************************/
  47
  48 /*** file scope type declarations ****************************************************************/
  49
  50 /*** file scope variables ************************************************************************/
  51
  52 /*** file scope functions ************************************************************************/
  53
  54 /*** public functions ****************************************************************************/
  55
  56 gchar *
  57 mc_search__recode_str (const char *str, gsize str_len,
  58                        const char *charset_from, const char *charset_to, gsize * bytes_written)
  59 {
  60     gchar *ret;
  61     gsize bytes_read;
  62     GIConv conv;
  63
  64     if (charset_from == NULL || charset_to == NULL  || !strcmp (charset_to, charset_from)) {
  65         *bytes_written = str_len;
  66         return g_strndup (str, str_len);
  67     }
  68
  69     conv = g_iconv_open (charset_to, charset_from);
  70     if (conv == INVALID_CONV)
  71         return NULL;
  72
  73     ret = g_convert_with_iconv (str, str_len, conv, &bytes_read, bytes_written, NULL);
  74     g_iconv_close (conv);
  75     return ret;
  76 }
  77
  78 /* --------------------------------------------------------------------------------------------- */
  79
  80 gchar *
  81 mc_search__get_one_symbol (const char *charset, const char *str, gsize str_len,
  82                            gboolean * just_letters)
  83 {
  84
  85     gchar *converted_str, *next_char;
  86
  87     gsize tmp_len;
  88 #ifdef HAVE_CHARSET
  89     gsize converted_str_len;
  90     gchar *converted_str2;
  91
  92     if (charset == NULL)
  93         charset = cp_source;
  94
  95     converted_str = mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
  96 #else
  97     converted_str = g_strndup (str, str_len);
  98 #endif
  99
 100     next_char = (char *) str_cget_next_char (converted_str);
 101
 102     tmp_len = next_char - converted_str;
 103
 104     converted_str[tmp_len] = '\0';
 105
 106 #ifdef HAVE_CHARSET
 107     converted_str2 =
 108         mc_search__recode_str (converted_str, tmp_len, cp_display, charset, &converted_str_len);
 109 #endif
 110     if (just_letters) {
 111         if (str_isalnum (converted_str) && !str_isdigit (converted_str))
 112             *just_letters = TRUE;
 113         else
 114             *just_letters = FALSE;
 115     }
 116 #ifdef HAVE_CHARSET
 117     g_free (converted_str);
 118     return converted_str2;
 119 #else
 120     return converted_str;
 121 #endif
 122 }
 123
 124 /* --------------------------------------------------------------------------------------------- */
 125 int
 126 mc_search__get_char (mc_search_t * lc_mc_search, const void *user_data, gsize current_pos)
 127 {
 128     char *data;
 129     if (lc_mc_search->search_fn)
 130         return (lc_mc_search->search_fn) (user_data, current_pos);
 131
 132     data = (char *) user_data;
 133     return (int) (unsigned char) data[current_pos];
 134 }
 135
 136 /* --------------------------------------------------------------------------------------------- */
 137
 138
 139 GString *
 140 mc_search__tolower_case_str (const char *charset, const char *str, gsize str_len)
 141 {
 142     GString *ret;
 143 #ifdef HAVE_CHARSET
 144     gchar *converted_str, *tmp_str1, *tmp_str2, *tmp_str3;
 145     gsize converted_str_len;
 146     gsize tmp_len;
 147
 148     if (charset == NULL)
 149         charset = cp_source;
 150
 151     tmp_str2 = converted_str =
 152         mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
 153     if (converted_str == NULL)
 154         return NULL;
 155
 156     tmp_len = converted_str_len + 1;
 157
 158     tmp_str3 = tmp_str1 = g_strdup (converted_str);
 159
 160     while (str_tolower (tmp_str1, &tmp_str2, &tmp_len))
 161         tmp_str1 += str_length_char (tmp_str1);
 162
 163     g_free (tmp_str3);
 164     tmp_str2 =
 165         mc_search__recode_str (converted_str, converted_str_len, cp_display, charset, &tmp_len);
 166     g_free (converted_str);
 167     if (tmp_str2 == NULL)
 168         return NULL;
 169
 170     ret = g_string_new_len (tmp_str2, tmp_len);
 171     g_free (tmp_str2);
 172     return ret;
 173 #else
 174     const gchar *tmp_str1 = str;
 175     gchar *converted_str, *tmp_str2;
 176     gsize converted_str_len = str_len + 1;
 177
 178     tmp_str2 = converted_str = g_strndup (str, str_len);
 179
 180     while (str_tolower (tmp_str1, &tmp_str2, &converted_str_len))
 181         tmp_str1 += str_length_char (tmp_str1);
 182
 183     ret = g_string_new_len (converted_str, str_len);
 184     g_free (converted_str);
 185     return ret;
 186 #endif
 187 }
 188
 189 /* --------------------------------------------------------------------------------------------- */
 190
 191 GString *
 192 mc_search__toupper_case_str (const char *charset, const char *str, gsize str_len)
 193 {
 194     GString *ret;
 195 #ifdef HAVE_CHARSET
 196     gchar *converted_str, *tmp_str1, *tmp_str2, *tmp_str3;
 197     gsize converted_str_len;
 198     gsize tmp_len;
 199
 200     if (charset == NULL)
 201         charset = cp_source;
 202
 203     tmp_str2 = converted_str =
 204         mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
 205     if (converted_str == NULL)
 206         return NULL;
 207
 208     tmp_len = converted_str_len + 1;
 209
 210     tmp_str3 = tmp_str1 = g_strdup (converted_str);
 211
 212     while (str_toupper (tmp_str1, &tmp_str2, &tmp_len))
 213         tmp_str1 += str_length_char (tmp_str1);
 214
 215     g_free (tmp_str3);
 216
 217     tmp_str2 =
 218         mc_search__recode_str (converted_str, converted_str_len, cp_display, charset, &tmp_len);
 219     g_free (converted_str);
 220     if (tmp_str2 == NULL)
 221         return NULL;
 222
 223     ret = g_string_new_len (tmp_str2, tmp_len);
 224     g_free (tmp_str2);
 225     return ret;
 226 #else
 227     const gchar *tmp_str1 = str;
 228     gchar *converted_str, *tmp_str2;
 229     gsize converted_str_len = str_len + 1;
 230
 231     tmp_str2 = converted_str = g_strndup (str, str_len);
 232
 233     while (str_toupper (tmp_str1, &tmp_str2, &converted_str_len))
 234         tmp_str1 += str_length_char (tmp_str1);
 235
 236     ret = g_string_new_len (converted_str, str_len);
 237     g_free (converted_str);
 238     return ret;
 239 #endif
 240 }
 241
 242 /* --------------------------------------------------------------------------------------------- */
 243
 244 gchar **
 245 mc_search_get_types_strings_array (size_t *num)
 246 {
 247     gchar **ret;
 248     int lc_index;
 249     size_t n;
 250
 251     const mc_search_type_str_t *type_str;
 252     const mc_search_type_str_t *types_str = mc_search_types_list_get (&n);
 253
 254     ret = g_new0 (char *, n + 1);
 255     if (ret == NULL)
 256         return NULL;
 257
 258     for (lc_index = 0, type_str = types_str;
 259             type_str->str != NULL;
 260             type_str++, lc_index++)
 261         ret[lc_index] = g_strdup (type_str->str);
 262
 263     /* don't count last NULL item */
 264     if (num != NULL)
 265         *num = (size_t) lc_index;
 266
 267     return ret;
 268 }
 269
 270 /* --------------------------------------------------------------------------------------------- */