lib/search/lib.c

   1 /*
   2    Search text engine.
   3    Common share code for module.
   4
   5    Copyright (C) 2009-2016
   6    Free Software Foundation, Inc.
   7
   8    Written by:
   9    Slava Zanko <slavazanko@gmail.com>, 2009, 2011
  10    Andrew Borodin <aborodin@vmail.ru>, 2013
  11
  12    This file is part of the Midnight Commander.
  13
  14    The Midnight Commander is free software: you can redistribute it
  15    and/or modify it under the terms of the GNU General Public License as
  16    published by the Free Software Foundation, either version 3 of the License,
  17    or (at your option) any later version.
  18
  19    The Midnight Commander is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22    GNU General Public License for more details.
  23
  24    You should have received a copy of the GNU General Public License
  25    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26  */
  27
  28 #include <config.h>
  29
  30 #include <stdlib.h>
  31 #include <sys/types.h>
  32
  33 #include "lib/global.h"
  34 #include "lib/strutil.h"
  35 #include "lib/search.h"
  36 #ifdef HAVE_CHARSET
  37 #include "lib/charsets.h"
  38 #endif
  39
  40 #include "internal.h"
  41
  42 /*** global variables ****************************************************************************/
  43
  44 const char *STR_E_NOTFOUND = N_("Search string not found");
  45 const char *STR_E_UNKNOWN_TYPE = N_("Not implemented yet");
  46 const char *STR_E_RPL_NOT_EQ_TO_FOUND =
  47 N_("Num of replace tokens not equal to num of found tokens");
  48 const char *STR_E_RPL_INVALID_TOKEN = N_("Invalid token number %d");
  49
  50 /*** file scope macro definitions ****************************************************************/
  51
  52 /*** file scope type declarations ****************************************************************/
  53
  54 /*** file scope variables ************************************************************************/
  55
  56 /*** file scope functions ************************************************************************/
  57
  58 /*** public functions ****************************************************************************/
  59
  60 gchar *
  61 mc_search__recode_str (const char *str, gsize str_len,
  62                        const char *charset_from, const char *charset_to, gsize * bytes_written)
  63 {
  64     gchar *ret;
  65     gsize bytes_read;
  66     GIConv conv;
  67
  68     if (charset_from == NULL || charset_to == NULL
  69         || g_ascii_strcasecmp (charset_to, charset_from) == 0)
  70     {
  71         *bytes_written = str_len;
  72         return g_strndup (str, str_len);
  73     }
  74
  75     conv = g_iconv_open (charset_to, charset_from);
  76     if (conv == INVALID_CONV)
  77     {
  78         *bytes_written = str_len;
  79         return g_strndup (str, str_len);
  80     }
  81
  82     ret = g_convert_with_iconv (str, str_len, conv, &bytes_read, bytes_written, NULL);
  83     g_iconv_close (conv);
  84
  85     if (ret == NULL)
  86     {
  87         *bytes_written = str_len;
  88         return g_strndup (str, str_len);
  89     }
  90
  91     return ret;
  92 }
  93
  94 /* --------------------------------------------------------------------------------------------- */
  95
  96 gchar *
  97 mc_search__get_one_symbol (const char *charset, const char *str, gsize str_len,
  98                            gboolean * just_letters)
  99 {
 100     gchar *converted_str;
 101     const gchar *next_char;
 102
 103     gsize tmp_len;
 104 #ifdef HAVE_CHARSET
 105     gsize converted_str_len;
 106     gchar *converted_str2;
 107
 108     if (charset == NULL)
 109         charset = cp_source;
 110
 111     converted_str = mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
 112 #else
 113     (void) charset;
 114
 115     converted_str = g_strndup (str, str_len);
 116 #endif
 117
 118     next_char = str_cget_next_char (converted_str);
 119
 120     tmp_len = next_char - converted_str;
 121
 122     converted_str[tmp_len] = '\0';
 123
 124 #ifdef HAVE_CHARSET
 125     converted_str2 =
 126         mc_search__recode_str (converted_str, tmp_len, cp_display, charset, &converted_str_len);
 127 #endif
 128     if (just_letters)
 129     {
 130         if (str_isalnum (converted_str) && !str_isdigit (converted_str))
 131             *just_letters = TRUE;
 132         else
 133             *just_letters = FALSE;
 134     }
 135 #ifdef HAVE_CHARSET
 136     g_free (converted_str);
 137     return converted_str2;
 138 #else
 139     return converted_str;
 140 #endif
 141 }
 142
 143 /* --------------------------------------------------------------------------------------------- */
 144
 145 GString *
 146 mc_search__tolower_case_str (const char *charset, const char *str, gsize str_len)
 147 {
 148     GString *ret;
 149 #ifdef HAVE_CHARSET
 150     gchar *converted_str, *tmp_str1, *tmp_str2, *tmp_str3;
 151     gsize converted_str_len;
 152     gsize tmp_len;
 153
 154     if (charset == NULL)
 155         charset = cp_source;
 156
 157     tmp_str2 = converted_str =
 158         mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
 159
 160     tmp_len = converted_str_len + 1;
 161
 162     tmp_str3 = tmp_str1 = g_strdup (converted_str);
 163
 164     while (str_tolower (tmp_str1, &tmp_str2, &tmp_len))
 165         tmp_str1 += str_length_char (tmp_str1);
 166
 167     g_free (tmp_str3);
 168     tmp_str2 =
 169         mc_search__recode_str (converted_str, converted_str_len, cp_display, charset, &tmp_len);
 170     g_free (converted_str);
 171
 172     ret = g_string_new_len (tmp_str2, tmp_len);
 173     g_free (tmp_str2);
 174     return ret;
 175 #else
 176     const gchar *tmp_str1 = str;
 177     gchar *converted_str, *tmp_str2;
 178     gsize converted_str_len = str_len + 1;
 179
 180     (void) charset;
 181
 182     tmp_str2 = converted_str = g_strndup (str, str_len);
 183
 184     while (str_tolower (tmp_str1, &tmp_str2, &converted_str_len))
 185         tmp_str1 += str_length_char (tmp_str1);
 186
 187     ret = g_string_new_len (converted_str, str_len);
 188     g_free (converted_str);
 189     return ret;
 190 #endif
 191 }
 192
 193 /* --------------------------------------------------------------------------------------------- */
 194
 195 GString *
 196 mc_search__toupper_case_str (const char *charset, const char *str, gsize str_len)
 197 {
 198     GString *ret;
 199 #ifdef HAVE_CHARSET
 200     gchar *converted_str, *tmp_str1, *tmp_str2, *tmp_str3;
 201     gsize converted_str_len;
 202     gsize tmp_len;
 203
 204     if (charset == NULL)
 205         charset = cp_source;
 206
 207     tmp_str2 = converted_str =
 208         mc_search__recode_str (str, str_len, charset, cp_display, &converted_str_len);
 209
 210     tmp_len = converted_str_len + 1;
 211
 212     tmp_str3 = tmp_str1 = g_strdup (converted_str);
 213
 214     while (str_toupper (tmp_str1, &tmp_str2, &tmp_len))
 215         tmp_str1 += str_length_char (tmp_str1);
 216
 217     g_free (tmp_str3);
 218
 219     tmp_str2 =
 220         mc_search__recode_str (converted_str, converted_str_len, cp_display, charset, &tmp_len);
 221     g_free (converted_str);
 222
 223     ret = g_string_new_len (tmp_str2, tmp_len);
 224     g_free (tmp_str2);
 225     return ret;
 226 #else
 227
 228     const gchar *tmp_str1 = str;
 229     gchar *converted_str, *tmp_str2;
 230     gsize converted_str_len = str_len + 1;
 231
 232     (void) charset;
 233
 234     tmp_str2 = converted_str = g_strndup (str, str_len);
 235
 236     while (str_toupper (tmp_str1, &tmp_str2, &converted_str_len))
 237         tmp_str1 += str_length_char (tmp_str1);
 238
 239     ret = g_string_new_len (converted_str, str_len);
 240     g_free (converted_str);
 241     return ret;
 242 #endif
 243 }
 244
 245 /* --------------------------------------------------------------------------------------------- */
 246
 247 gchar **
 248 mc_search_get_types_strings_array (size_t * num)
 249 {
 250     gchar **ret;
 251     int lc_index;
 252     size_t n;
 253
 254     const mc_search_type_str_t *type_str;
 255     const mc_search_type_str_t *types_str = mc_search_types_list_get (&n);
 256
 257     ret = g_try_new0 (char *, n + 1);
 258     if (ret == NULL)
 259         return NULL;
 260
 261     for (lc_index = 0, type_str = types_str; type_str->str != NULL; type_str++, lc_index++)
 262         ret[lc_index] = g_strdup (type_str->str);
 263
 264     /* don't count last NULL item */
 265     if (num != NULL)
 266         *num = (size_t) lc_index;
 267
 268     return ret;
 269 }
 270
 271 /* --------------------------------------------------------------------------------------------- */