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diff --git a/lib/search/lib.c b/lib/search/lib.c
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+/*
+ Search text engine.
+ Common share code for module.
+
+ Copyright (C) 2009-2022
+ Free Software Foundation, Inc.
+
+ Written by:
+ Slava Zanko <slavazanko@gmail.com>, 2009, 2011
+ Andrew Borodin <aborodin@vmail.ru>, 2013
+
+ This file is part of the Midnight Commander.
+
+ The Midnight Commander is free software: you can redistribute it
+ and/or modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ The Midnight Commander is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include "lib/global.h"
+#include "lib/strutil.h"
+#include "lib/search.h"
+#ifdef HAVE_CHARSET
+#include "lib/charsets.h"
+#endif
+
+#include "internal.h"
+
+/*** global variables ****************************************************************************/
+
+const char *STR_E_NOTFOUND = N_("Search string not found");
+const char *STR_E_UNKNOWN_TYPE = N_("Not implemented yet");
+const char *STR_E_RPL_NOT_EQ_TO_FOUND =
+N_("Num of replace tokens not equal to num of found tokens");
+const char *STR_E_RPL_INVALID_TOKEN = N_("Invalid token number %d");
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+typedef gboolean (*case_conv_fn) (const char *ch, char **out, size_t * remain);
+
+/*** file scope variables ************************************************************************/
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static GString *
+mc_search__change_case_str (const char *charset, const GString * str, case_conv_fn case_conv)
+{
+ GString *ret;
+ const char *src_ptr;
+ gchar *dst_str;
+ gchar *dst_ptr;
+ gsize dst_len;
+#ifdef HAVE_CHARSET
+ GString *converted_str;
+
+ if (charset == NULL)
+ charset = cp_source;
+
+ converted_str = mc_search__recode_str (str->str, str->len, charset, cp_display);
+
+ dst_len = converted_str->len + 1; /* +1 is required for str_toupper/str_tolower */
+ dst_str = g_malloc (dst_len);
+
+ for (src_ptr = converted_str->str, dst_ptr = dst_str;
+ case_conv (src_ptr, &dst_ptr, &dst_len); src_ptr += str_length_char (src_ptr))
+ ;
+ *dst_ptr = '\0';
+
+ dst_len = converted_str->len;
+ g_string_free (converted_str, TRUE);
+
+ ret = mc_search__recode_str (dst_str, dst_len, cp_display, charset);
+ g_free (dst_str);
+#else
+ (void) charset;
+
+ dst_len = str->len + 1; /* +1 is required for str_toupper/str_tolower */
+ dst_str = g_malloc (dst_len);
+
+ for (src_ptr = str->str, dst_ptr = dst_str;
+ case_conv (src_ptr, &dst_ptr, &dst_len); src_ptr += str_length_char (src_ptr))
+ ;
+ *dst_ptr = '\0';
+
+ ret = g_string_new_len (dst_str, dst_len);
+ g_free (dst_str);
+#endif
+ return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+GString *
+mc_search__recode_str (const char *str, gsize str_len, const char *charset_from,
+ const char *charset_to)
+{
+ GString *ret = NULL;
+
+ if (charset_from != NULL && charset_to != NULL
+ && g_ascii_strcasecmp (charset_to, charset_from) != 0)
+ {
+ GIConv conv;
+
+ conv = g_iconv_open (charset_to, charset_from);
+ if (conv != INVALID_CONV)
+ {
+ gchar *val;
+ gsize bytes_read = 0;
+ gsize bytes_written = 0;
+
+ val = g_convert_with_iconv (str, str_len, conv, &bytes_read, &bytes_written, NULL);
+
+ g_iconv_close (conv);
+
+ if (val != NULL)
+ {
+ ret = g_string_new_len (val, bytes_written);
+ g_free (val);
+ }
+ }
+ }
+
+ if (ret == NULL)
+ ret = g_string_new_len (str, str_len);
+
+ return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+GString *
+mc_search__get_one_symbol (const char *charset, const char *str, gsize str_len,
+ gboolean * just_letters)
+{
+ GString *converted_str;
+ const gchar *next_char;
+
+#ifdef HAVE_CHARSET
+ GString *converted_str2;
+
+ if (charset == NULL)
+ charset = cp_source;
+
+ converted_str = mc_search__recode_str (str, str_len, charset, cp_display);
+#else
+ (void) charset;
+
+ converted_str = g_string_new_len (str, str_len);
+#endif
+
+ next_char = str_cget_next_char (converted_str->str);
+ g_string_set_size (converted_str, (gsize) (next_char - converted_str->str));
+
+#ifdef HAVE_CHARSET
+ converted_str2 =
+ mc_search__recode_str (converted_str->str, converted_str->len, cp_display, charset);
+#endif
+ if (just_letters != NULL)
+ *just_letters = str_isalnum (converted_str->str) && !str_isdigit (converted_str->str);
+#ifdef HAVE_CHARSET
+ g_string_free (converted_str, TRUE);
+ return converted_str2;
+#else
+ return converted_str;
+#endif
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+GString *
+mc_search__tolower_case_str (const char *charset, const GString * str)
+{
+ return mc_search__change_case_str (charset, str, str_tolower);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+GString *
+mc_search__toupper_case_str (const char *charset, const GString * str)
+{
+ return mc_search__change_case_str (charset, str, str_toupper);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gchar **
+mc_search_get_types_strings_array (size_t * num)
+{
+ gchar **ret;
+ int lc_index;
+ size_t n;
+
+ const mc_search_type_str_t *type_str;
+ const mc_search_type_str_t *types_str = mc_search_types_list_get (&n);
+
+ ret = g_try_new0 (char *, n + 1);
+ if (ret == NULL)
+ return NULL;
+
+ for (lc_index = 0, type_str = types_str; type_str->str != NULL; type_str++, lc_index++)
+ ret[lc_index] = g_strdup (type_str->str);
+
+ /* don't count last NULL item */
+ if (num != NULL)
+ *num = (size_t) lc_index;
+
+ return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
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