Adding upstream version 3:4.8.29.upstream/3%4.8.29upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 3226 insertions, 0 deletions

diff --git a/lib/search/Makefile.am b/lib/search/Makefile.am
new file mode 100644
index 0000000..ed9d3aa
--- /dev/null
+++ b/lib/search/Makefile.am
@@ -0,0 +1,12 @@
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diff --git a/lib/search/Makefile.in b/lib/search/Makefile.in
new file mode 100644
index 0000000..5558941
--- /dev/null
+++ b/lib/search/Makefile.in
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+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+libsearch.la: $(libsearch_la_OBJECTS) $(libsearch_la_DEPENDENCIES) $(EXTRA_libsearch_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK)  $(libsearch_la_OBJECTS) $(libsearch_la_LIBADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/glob.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/hex.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/lib.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/normal.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/regex.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/search.Plo@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ $<
+
+.c.obj:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
+
+.c.lo:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LTCOMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
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+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/glob.Plo
+	-rm -f ./$(DEPDIR)/hex.Plo
+	-rm -f ./$(DEPDIR)/lib.Plo
+	-rm -f ./$(DEPDIR)/normal.Plo
+	-rm -f ./$(DEPDIR)/regex.Plo
+	-rm -f ./$(DEPDIR)/search.Plo
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
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+info: info-am
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+install-dvi: install-dvi-am
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+install-dvi-am:
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+install-exec-am:
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+install-html: install-html-am
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+install-html-am:
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+install-info: install-info-am
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+install-info-am:
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+install-pdf-am:
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+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/glob.Plo
+	-rm -f ./$(DEPDIR)/hex.Plo
+	-rm -f ./$(DEPDIR)/lib.Plo
+	-rm -f ./$(DEPDIR)/normal.Plo
+	-rm -f ./$(DEPDIR)/regex.Plo
+	-rm -f ./$(DEPDIR)/search.Plo
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+pdf: pdf-am
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+pdf-am:
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+ps: ps-am
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+ps-am:
+
+uninstall-am:
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-noinstLTLIBRARIES \
+	cscopelist-am ctags ctags-am distclean distclean-compile \
+	distclean-generic distclean-libtool distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/lib/search/glob.c b/lib/search/glob.c
new file mode 100644
index 0000000..ae1b931
--- /dev/null
+++ b/lib/search/glob.c
@@ -0,0 +1,203 @@
+/*
+   Search text engine.
+   Glob-style pattern matching
+
+   Copyright (C) 2009-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Slava Zanko <slavazanko@gmail.com>, 2009.
+
+   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 "lib/global.h"
+#include "lib/strutil.h"
+#include "lib/search.h"
+#include "lib/strescape.h"
+
+#include "internal.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/*** file scope functions ************************************************************************/
+
+static GString *
+mc_search__glob_translate_to_regex (const GString * astr)
+{
+    const char *str = astr->str;
+    GString *buff;
+    gsize loop;
+    gboolean inside_group = FALSE;
+
+    buff = g_string_sized_new (32);
+
+    for (loop = 0; loop < astr->len; loop++)
+    {
+        switch (str[loop])
+        {
+        case '*':
+            if (!strutils_is_char_escaped (str, &(str[loop])))
+            {
+                g_string_append (buff, inside_group ? ".*" : "(.*)");
+                continue;
+            }
+            break;
+        case '?':
+            if (!strutils_is_char_escaped (str, &(str[loop])))
+            {
+                g_string_append (buff, inside_group ? "." : "(.)");
+                continue;
+            }
+            break;
+        case ',':
+            if (!strutils_is_char_escaped (str, &(str[loop])))
+            {
+                g_string_append_c (buff, inside_group ? '|' : ',');
+                continue;
+            }
+            break;
+        case '{':
+            if (!strutils_is_char_escaped (str, &(str[loop])))
+            {
+                g_string_append_c (buff, '(');
+                inside_group = TRUE;
+                continue;
+            }
+            break;
+        case '}':
+            if (!strutils_is_char_escaped (str, &(str[loop])))
+            {
+                g_string_append_c (buff, ')');
+                inside_group = FALSE;
+                continue;
+            }
+            break;
+        case '+':
+        case '.':
+        case '$':
+        case '(':
+        case ')':
+        case '^':
+            g_string_append_c (buff, '\\');
+            break;
+        default:
+            break;
+        }
+        g_string_append_c (buff, str[loop]);
+    }
+    return buff;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static GString *
+mc_search__translate_replace_glob_to_regex (const char *str)
+{
+    GString *buff;
+    char cnt = '0';
+    gboolean escaped_mode = FALSE;
+
+    buff = g_string_sized_new (32);
+
+    while (*str != '\0')
+    {
+        char c = *str++;
+
+        switch (c)
+        {
+        case '\\':
+            if (!escaped_mode)
+            {
+                escaped_mode = TRUE;
+                g_string_append_c (buff, '\\');
+                continue;
+            }
+            break;
+        case '*':
+        case '?':
+            if (!escaped_mode)
+            {
+                g_string_append_c (buff, '\\');
+                c = ++cnt;
+            }
+            break;
+        case '&':
+            if (!escaped_mode)
+                g_string_append_c (buff, '\\');
+            break;
+        default:
+            break;
+        }
+        g_string_append_c (buff, c);
+        escaped_mode = FALSE;
+    }
+    return buff;
+}
+
+/*** public functions ****************************************************************************/
+
+void
+mc_search__cond_struct_new_init_glob (const char *charset, mc_search_t * lc_mc_search,
+                                      mc_search_cond_t * mc_search_cond)
+{
+    GString *tmp;
+
+    tmp = mc_search__glob_translate_to_regex (mc_search_cond->str);
+    g_string_free (mc_search_cond->str, TRUE);
+
+    if (lc_mc_search->is_entire_line)
+    {
+        g_string_prepend_c (tmp, '^');
+        g_string_append_c (tmp, '$');
+    }
+    mc_search_cond->str = tmp;
+
+    mc_search__cond_struct_new_init_regex (charset, lc_mc_search, mc_search_cond);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_search__run_glob (mc_search_t * lc_mc_search, const void *user_data,
+                     gsize start_search, gsize end_search, gsize * found_len)
+{
+    return mc_search__run_regex (lc_mc_search, user_data, start_search, end_search, found_len);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+GString *
+mc_search_glob_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
+{
+    GString *repl, *res;
+
+    repl = mc_search__translate_replace_glob_to_regex (replace_str->str);
+    res = mc_search_regex_prepare_replace_str (lc_mc_search, repl);
+    g_string_free (repl, TRUE);
+
+    return res;
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/search/hex.c b/lib/search/hex.c
new file mode 100644
index 0000000..40bae1e
--- /dev/null
+++ b/lib/search/hex.c
@@ -0,0 +1,229 @@
+/*
+   Search text engine.
+   HEX-style pattern matching
+
+   Copyright (C) 2009-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Slava Zanko <slavazanko@gmail.com>, 2009.
+
+   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 <stdio.h>
+
+#include "lib/global.h"
+#include "lib/strutil.h"
+#include "lib/search.h"
+#include "lib/strescape.h"
+
+#include "internal.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+typedef enum
+{
+    MC_SEARCH_HEX_E_OK,
+    MC_SEARCH_HEX_E_NUM_OUT_OF_RANGE,
+    MC_SEARCH_HEX_E_INVALID_CHARACTER,
+    MC_SEARCH_HEX_E_UNMATCHED_QUOTES
+} mc_search_hex_parse_error_t;
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/*** file scope functions ************************************************************************/
+
+static GString *
+mc_search__hex_translate_to_regex (const GString * astr, mc_search_hex_parse_error_t * error_ptr,
+                                   int *error_pos_ptr)
+{
+    GString *buff;
+    const char *str;
+    gsize str_len;
+    gsize loop = 0;
+    mc_search_hex_parse_error_t error = MC_SEARCH_HEX_E_OK;
+
+    buff = g_string_sized_new (64);
+    str = astr->str;
+    str_len = astr->len;
+
+    while (loop < str_len && error == MC_SEARCH_HEX_E_OK)
+    {
+        unsigned int val;
+        int ptr;
+
+        if (g_ascii_isspace (str[loop]))
+        {
+            /* Eat-up whitespace between tokens. */
+            while (g_ascii_isspace (str[loop]))
+                loop++;
+        }
+        /* cppcheck-suppress invalidscanf */
+        else if (sscanf (str + loop, "%x%n", &val, &ptr) == 1)
+        {
+            if (val > 255)
+                error = MC_SEARCH_HEX_E_NUM_OUT_OF_RANGE;
+            else
+            {
+                g_string_append_printf (buff, "\\x%02X", val);
+                loop += ptr;
+            }
+        }
+        else if (str[loop] == '"')
+        {
+            gsize loop2;
+
+            loop2 = loop + 1;
+
+            while (loop2 < str_len)
+            {
+                if (str[loop2] == '"')
+                    break;
+                if (str[loop2] == '\\' && loop2 + 1 < str_len)
+                    loop2++;
+                g_string_append_c (buff, str[loop2]);
+                loop2++;
+            }
+
+            if (str[loop2] == '\0')
+                error = MC_SEARCH_HEX_E_UNMATCHED_QUOTES;
+            else
+                loop = loop2 + 1;
+        }
+        else
+            error = MC_SEARCH_HEX_E_INVALID_CHARACTER;
+    }
+
+    if (error != MC_SEARCH_HEX_E_OK)
+    {
+        g_string_free (buff, TRUE);
+        if (error_ptr != NULL)
+            *error_ptr = error;
+        if (error_pos_ptr != NULL)
+            *error_pos_ptr = loop;
+        return NULL;
+    }
+
+    return buff;
+}
+
+/*** public functions ****************************************************************************/
+
+void
+mc_search__cond_struct_new_init_hex (const char *charset, mc_search_t * lc_mc_search,
+                                     mc_search_cond_t * mc_search_cond)
+{
+    GString *tmp;
+    mc_search_hex_parse_error_t error = MC_SEARCH_HEX_E_OK;
+    int error_pos = 0;
+
+    /*
+     * We may be searching in binary data, which is often invalid UTF-8.
+     *
+     * We have to create a non UTF-8 regex (that is, G_REGEX_RAW) or else, as
+     * the data is invalid UTF-8, both GLib's PCRE and our
+     * mc_search__g_regex_match_full_safe() are going to fail us. The former by
+     * not finding all bytes, the latter by overwriting the supposedly invalid
+     * UTF-8 with NULs.
+     *
+     * To do this, we specify "ASCII" as the charset.
+     *
+     * In fact, we can specify any charset other than "UTF-8": any such charset
+     * will trigger G_REGEX_RAW (see [1]). The output of [2] will be the same
+     * for all charsets because it skips the \xXX symbols
+     * mc_search__hex_translate_to_regex() outputs.
+     *
+     * But "ASCII" is the best choice because a hex pattern may contain a
+     * quoted string: this way we know [2] will ignore any characters outside
+     * ASCII letters range (these ignored chars will be copied verbatim to the
+     * output and will match as-is; in other words, in a case-sensitive manner;
+     * If the user is interested in case-insensitive searches of international
+     * text, he shouldn't be using hex search in the first place.)
+     *
+     * Switching out of UTF-8 has another advantage:
+     *
+     * When doing case-insensitive searches, GLib treats \xXX symbols as normal
+     * letters and therefore matches both "a" and "A" for the hex pattern
+     * "0x61". When we switch out of UTF-8, we're switching to using [2], which
+     * doesn't have this issue.
+     *
+     * [1] mc_search__cond_struct_new_init_regex
+     * [2] mc_search__cond_struct_new_regex_ci_str
+     */
+    if (str_isutf8 (charset))
+        charset = "ASCII";
+
+    tmp = mc_search__hex_translate_to_regex (mc_search_cond->str, &error, &error_pos);
+    if (tmp != NULL)
+    {
+        g_string_free (mc_search_cond->str, TRUE);
+        mc_search_cond->str = tmp;
+        mc_search__cond_struct_new_init_regex (charset, lc_mc_search, mc_search_cond);
+    }
+    else
+    {
+        const char *desc;
+
+        switch (error)
+        {
+        case MC_SEARCH_HEX_E_NUM_OUT_OF_RANGE:
+            desc =
+                _
+                ("Number out of range (should be in byte range, 0 <= n <= 0xFF, expressed in hex)");
+            break;
+        case MC_SEARCH_HEX_E_INVALID_CHARACTER:
+            desc = _("Invalid character");
+            break;
+        case MC_SEARCH_HEX_E_UNMATCHED_QUOTES:
+            desc = _("Unmatched quotes character");
+            break;
+        default:
+            desc = "";
+        }
+
+        lc_mc_search->error = MC_SEARCH_E_INPUT;
+        lc_mc_search->error_str =
+            g_strdup_printf (_("Hex pattern error at position %d:\n%s."), error_pos + 1, desc);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_search__run_hex (mc_search_t * lc_mc_search, const void *user_data,
+                    gsize start_search, gsize end_search, gsize * found_len)
+{
+    return mc_search__run_regex (lc_mc_search, user_data, start_search, end_search, found_len);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+GString *
+mc_search_hex_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
+{
+    (void) lc_mc_search;
+
+    return mc_g_string_dup (replace_str);
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/search/internal.h b/lib/search/internal.h
new file mode 100644
index 0000000..d7b015c
--- /dev/null
+++ b/lib/search/internal.h
@@ -0,0 +1,82 @@
+#ifndef MC__SEARCH_INTERNAL_H
+#define MC__SEARCH_INTERNAL_H
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+#ifdef SEARCH_TYPE_GLIB
+#define mc_search_regex_t GRegex
+#else
+#define mc_search_regex_t pcre
+#endif
+
+/*** enums ***************************************************************************************/
+
+typedef enum
+{
+    COND__NOT_FOUND,
+    COND__NOT_ALL_FOUND,
+    COND__FOUND_CHAR,
+    COND__FOUND_CHAR_LAST,
+    COND__FOUND_OK,
+    COND__FOUND_ERROR
+} mc_search__found_cond_t;
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+typedef struct mc_search_cond_struct
+{
+    GString *str;
+    GString *upper;
+    GString *lower;
+    mc_search_regex_t *regex_handle;
+    gchar *charset;
+} mc_search_cond_t;
+
+/*** global variables defined in .c file *********************************************************/
+
+/*** declarations of public functions ************************************************************/
+
+/* search/lib.c : */
+
+GString *mc_search__recode_str (const char *str, gsize str_len, const char *charset_from,
+                                const char *charset_to);
+GString *mc_search__get_one_symbol (const char *charset, const char *str, gsize str_len,
+                                    gboolean * just_letters);
+GString *mc_search__tolower_case_str (const char *charset, const GString * str);
+GString *mc_search__toupper_case_str (const char *charset, const GString * str);
+
+/* search/regex.c : */
+
+void mc_search__cond_struct_new_init_regex (const char *charset, mc_search_t * lc_mc_search,
+                                            mc_search_cond_t * mc_search_cond);
+gboolean mc_search__run_regex (mc_search_t * lc_mc_search, const void *user_data,
+                               gsize start_search, gsize end_search, gsize * found_len);
+GString *mc_search_regex_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str);
+
+/* search/normal.c : */
+
+void mc_search__cond_struct_new_init_normal (const char *charset, mc_search_t * lc_mc_search,
+                                             mc_search_cond_t * mc_search_cond);
+gboolean mc_search__run_normal (mc_search_t * lc_mc_search, const void *user_data,
+                                gsize start_search, gsize end_search, gsize * found_len);
+GString *mc_search_normal_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str);
+
+/* search/glob.c : */
+
+void mc_search__cond_struct_new_init_glob (const char *charset, mc_search_t * lc_mc_search,
+                                           mc_search_cond_t * mc_search_cond);
+gboolean mc_search__run_glob (mc_search_t * lc_mc_search, const void *user_data,
+                              gsize start_search, gsize end_search, gsize * found_len);
+GString *mc_search_glob_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str);
+
+/* search/hex.c : */
+
+void mc_search__cond_struct_new_init_hex (const char *charset, mc_search_t * lc_mc_search,
+                                          mc_search_cond_t * mc_search_cond);
+gboolean mc_search__run_hex (mc_search_t * lc_mc_search, const void *user_data,
+                             gsize start_search, gsize end_search, gsize * found_len);
+GString *mc_search_hex_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str);
+
+/*** inline functions ****************************************************************************/
+
+#endif /* MC__SEARCH_INTERNAL_H */
diff --git a/lib/search/lib.c b/lib/search/lib.c
new file mode 100644
index 0000000..6ec5630
--- /dev/null
+++ b/lib/search/lib.c
@@ -0,0 +1,229 @@
+/*
+   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;
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/lib/search/normal.c b/lib/search/normal.c
new file mode 100644
index 0000000..483e4a4
--- /dev/null
+++ b/lib/search/normal.c
@@ -0,0 +1,106 @@
+/*
+   Search text engine.
+   Plain search
+
+   Copyright (C) 2009-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Slava Zanko <slavazanko@gmail.com>, 2009.
+
+   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 "lib/global.h"
+#include "lib/strutil.h"
+#include "lib/search.h"
+
+#include "internal.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_search__normal_translate_to_regex (GString * str)
+{
+    gsize loop;
+
+    for (loop = 0; loop < str->len; loop++)
+        switch (str->str[loop])
+        {
+        case '*':
+        case '?':
+        case ',':
+        case '{':
+        case '}':
+        case '[':
+        case ']':
+        case '\\':
+        case '+':
+        case '.':
+        case '$':
+        case '(':
+        case ')':
+        case '^':
+        case '-':
+        case '|':
+            g_string_insert_c (str, loop, '\\');
+            loop++;
+        default:
+            break;
+        }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mc_search__cond_struct_new_init_normal (const char *charset, mc_search_t * lc_mc_search,
+                                        mc_search_cond_t * mc_search_cond)
+{
+    mc_search__normal_translate_to_regex (mc_search_cond->str);
+    mc_search__cond_struct_new_init_regex (charset, lc_mc_search, mc_search_cond);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_search__run_normal (mc_search_t * lc_mc_search, const void *user_data,
+                       gsize start_search, gsize end_search, gsize * found_len)
+{
+    return mc_search__run_regex (lc_mc_search, user_data, start_search, end_search, found_len);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+GString *
+mc_search_normal_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
+{
+    (void) lc_mc_search;
+
+    return mc_g_string_dup (replace_str);
+}
diff --git a/lib/search/regex.c b/lib/search/regex.c
new file mode 100644
index 0000000..07b6833
--- /dev/null
+++ b/lib/search/regex.c
@@ -0,0 +1,1086 @@
+/*
+   Search text engine.
+   Regex search
+
+   Copyright (C) 2009-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Slava Zanko <slavazanko@gmail.com>, 2009, 2010, 2011, 2013
+   Vitaliy Filippov <vitalif@yourcmc.ru>, 2011
+   Andrew Borodin <aborodin@vmail.ru>, 2013-2015
+
+   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 "lib/global.h"
+#include "lib/strutil.h"
+#include "lib/search.h"
+#include "lib/strescape.h"
+#include "lib/util.h"           /* MC_PTR_FREE */
+
+#include "internal.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+#define REPLACE_PREPARE_T_NOTHING_SPECIAL -1
+#define REPLACE_PREPARE_T_REPLACE_FLAG    -2
+#define REPLACE_PREPARE_T_ESCAPE_SEQ      -3
+
+/*** file scope type declarations ****************************************************************/
+
+typedef enum
+{
+    REPLACE_T_NO_TRANSFORM = 0,
+    REPLACE_T_UPP_TRANSFORM_CHAR = 1,
+    REPLACE_T_LOW_TRANSFORM_CHAR = 2,
+    REPLACE_T_UPP_TRANSFORM = 4,
+    REPLACE_T_LOW_TRANSFORM = 8
+} replace_transform_type_t;
+
+
+/*** file scope variables ************************************************************************/
+
+/*** file scope functions ************************************************************************/
+
+static gboolean
+mc_search__regex_str_append_if_special (GString * copy_to, const GString * regex_str,
+                                        gsize * offset)
+{
+    const char *special_chars[] = {
+        "\\s", "\\S",
+        "\\d", "\\D",
+        "\\b", "\\B",
+        "\\w", "\\W",
+        "\\t", "\\n",
+        "\\r", "\\f",
+        "\\a", "\\e",
+        "\\x", "\\X",
+        "\\c", "\\C",
+        "\\l", "\\L",
+        "\\u", "\\U",
+        "\\E", "\\Q",
+        NULL
+    };
+
+    char *tmp_regex_str;
+    const char **spec_chr;
+
+    tmp_regex_str = &(regex_str->str[*offset]);
+
+    for (spec_chr = special_chars; *spec_chr != NULL; spec_chr++)
+    {
+        gsize spec_chr_len;
+
+        spec_chr_len = strlen (*spec_chr);
+
+        if (strncmp (tmp_regex_str, *spec_chr, spec_chr_len) == 0
+            && !strutils_is_char_escaped (regex_str->str, tmp_regex_str))
+        {
+            if (strncmp ("\\x", *spec_chr, spec_chr_len) == 0)
+            {
+                if (tmp_regex_str[spec_chr_len] != '{')
+                    spec_chr_len += 2;
+                else
+                {
+                    while ((spec_chr_len < regex_str->len - *offset)
+                           && tmp_regex_str[spec_chr_len] != '}')
+                        spec_chr_len++;
+                    if (tmp_regex_str[spec_chr_len] == '}')
+                        spec_chr_len++;
+                }
+            }
+            g_string_append_len (copy_to, tmp_regex_str, spec_chr_len);
+            *offset += spec_chr_len;
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_search__cond_struct_new_regex_hex_add (const char *charset, GString * str_to,
+                                          const GString * one_char)
+{
+    GString *upp, *low;
+    gsize loop;
+
+    upp = mc_search__toupper_case_str (charset, one_char);
+    low = mc_search__tolower_case_str (charset, one_char);
+
+    for (loop = 0; loop < upp->len; loop++)
+    {
+        gchar tmp_str[10 + 1];  /* longest content is "[\\x%02X\\x%02X]" */
+        gint tmp_len;
+
+        if (loop >= low->len || upp->str[loop] == low->str[loop])
+            tmp_len =
+                g_snprintf (tmp_str, sizeof (tmp_str), "\\x%02X", (unsigned char) upp->str[loop]);
+        else
+            tmp_len =
+                g_snprintf (tmp_str, sizeof (tmp_str), "[\\x%02X\\x%02X]",
+                            (unsigned char) upp->str[loop], (unsigned char) low->str[loop]);
+
+        g_string_append_len (str_to, tmp_str, tmp_len);
+    }
+
+    g_string_free (upp, TRUE);
+    g_string_free (low, TRUE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_search__cond_struct_new_regex_accum_append (const char *charset, GString * str_to,
+                                               GString * str_from)
+{
+    GString *recoded_part;
+    gsize loop = 0;
+
+    recoded_part = g_string_sized_new (32);
+
+    while (loop < str_from->len)
+    {
+        GString *one_char;
+        gboolean just_letters;
+
+        one_char =
+            mc_search__get_one_symbol (charset, str_from->str + loop,
+                                       MIN (str_from->len - loop, 6), &just_letters);
+
+        if (one_char->len == 0)
+            loop++;
+        else
+        {
+            loop += one_char->len;
+
+            if (just_letters)
+                mc_search__cond_struct_new_regex_hex_add (charset, recoded_part, one_char);
+            else
+                g_string_append_len (recoded_part, one_char->str, one_char->len);
+        }
+
+        g_string_free (one_char, TRUE);
+    }
+
+    g_string_append_len (str_to, recoded_part->str, recoded_part->len);
+    g_string_free (recoded_part, TRUE);
+    g_string_set_size (str_from, 0);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/**
+ * Creates a case-insensitive version of a regex pattern.
+ *
+ * For example (assuming ASCII charset): given "\\bHello!\\xAB", returns
+ * "\\b[Hh][Ee][Ll][Ll][Oo]!\\xAB" (this example is for easier reading; in
+ * reality hex codes are used instead of letters).
+ *
+ * This function knows not to ruin special regex symbols.
+ *
+ * This function is used when working with non-UTF-8 charsets: GLib's
+ * regex engine doesn't understand such charsets and therefore can't do
+ * this job itself.
+ */
+static GString *
+mc_search__cond_struct_new_regex_ci_str (const char *charset, const GString * astr)
+{
+    GString *accumulator, *spec_char, *ret_str;
+    gsize loop;
+
+    ret_str = g_string_sized_new (64);
+    accumulator = g_string_sized_new (64);
+    spec_char = g_string_sized_new (64);
+    loop = 0;
+
+    while (loop < astr->len)
+    {
+        if (mc_search__regex_str_append_if_special (spec_char, astr, &loop))
+        {
+            mc_search__cond_struct_new_regex_accum_append (charset, ret_str, accumulator);
+            g_string_append_len (ret_str, spec_char->str, spec_char->len);
+            g_string_set_size (spec_char, 0);
+            continue;
+        }
+
+        if (astr->str[loop] == '[' && !strutils_is_char_escaped (astr->str, &(astr->str[loop])))
+        {
+            mc_search__cond_struct_new_regex_accum_append (charset, ret_str, accumulator);
+
+            while (loop < astr->len && !(astr->str[loop] == ']'
+                                         && !strutils_is_char_escaped (astr->str,
+                                                                       &(astr->str[loop]))))
+            {
+                g_string_append_c (ret_str, astr->str[loop]);
+                loop++;
+            }
+
+            g_string_append_c (ret_str, astr->str[loop]);
+            loop++;
+            continue;
+        }
+        /*
+           TODO: handle [ and ]
+         */
+        g_string_append_c (accumulator, astr->str[loop]);
+        loop++;
+    }
+    mc_search__cond_struct_new_regex_accum_append (charset, ret_str, accumulator);
+
+    g_string_free (accumulator, TRUE);
+    g_string_free (spec_char, TRUE);
+
+    return ret_str;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+#ifdef SEARCH_TYPE_GLIB
+/* A thin wrapper above g_regex_match_full that makes sure the string passed
+ * to it is valid UTF-8 (unless G_REGEX_RAW compile flag was set), as it is a
+ * requirement by glib and it might crash otherwise. See: mc ticket 3449.
+ * Be careful: there might be embedded NULs in the strings. */
+static gboolean
+mc_search__g_regex_match_full_safe (const GRegex * regex,
+                                    const gchar * string,
+                                    gssize string_len,
+                                    gint start_position,
+                                    GRegexMatchFlags match_options,
+                                    GMatchInfo ** match_info, GError ** error)
+{
+    char *string_safe, *p, *end;
+    gboolean ret;
+
+    if (string_len < 0)
+        string_len = strlen (string);
+
+    if ((g_regex_get_compile_flags (regex) & G_REGEX_RAW)
+        || g_utf8_validate (string, string_len, NULL))
+    {
+        return g_regex_match_full (regex, string, string_len, start_position, match_options,
+                                   match_info, error);
+    }
+
+    /* Correctly handle embedded NULs while copying */
+    p = string_safe = g_malloc (string_len + 1);
+    memcpy (string_safe, string, string_len);
+    string_safe[string_len] = '\0';
+    end = p + string_len;
+
+    while (p < end)
+    {
+        gunichar c = g_utf8_get_char_validated (p, -1);
+        if (c != (gunichar) (-1) && c != (gunichar) (-2))
+        {
+            p = g_utf8_next_char (p);
+        }
+        else
+        {
+            /* U+FFFD would be the proper choice, but then we'd have to
+               maintain mapping between old and new offsets.
+               So rather do a byte by byte replacement. */
+            *p++ = '\0';
+        }
+    }
+
+    ret =
+        g_regex_match_full (regex, string_safe, string_len, start_position, match_options,
+                            match_info, error);
+    g_free (string_safe);
+    return ret;
+}
+#endif /* SEARCH_TYPE_GLIB */
+
+/* --------------------------------------------------------------------------------------------- */
+
+static mc_search__found_cond_t
+mc_search__regex_found_cond_one (mc_search_t * lc_mc_search, mc_search_regex_t * regex,
+                                 GString * search_str)
+{
+#ifdef SEARCH_TYPE_GLIB
+    GError *mcerror = NULL;
+
+    if (!mc_search__g_regex_match_full_safe
+        (regex, search_str->str, search_str->len, 0, G_REGEX_MATCH_NEWLINE_ANY,
+         &lc_mc_search->regex_match_info, &mcerror))
+    {
+        g_match_info_free (lc_mc_search->regex_match_info);
+        lc_mc_search->regex_match_info = NULL;
+        if (mcerror != NULL)
+        {
+            lc_mc_search->error = MC_SEARCH_E_REGEX;
+            g_free (lc_mc_search->error_str);
+            lc_mc_search->error_str =
+                str_conv_gerror_message (mcerror, _("Regular expression error"));
+            g_error_free (mcerror);
+            return COND__FOUND_ERROR;
+        }
+        return COND__NOT_FOUND;
+    }
+    lc_mc_search->num_results = g_match_info_get_match_count (lc_mc_search->regex_match_info);
+#else /* SEARCH_TYPE_GLIB */
+    lc_mc_search->num_results = pcre_exec (regex, lc_mc_search->regex_match_info,
+                                           search_str->str, search_str->len, 0, 0,
+                                           lc_mc_search->iovector, MC_SEARCH__NUM_REPLACE_ARGS);
+    if (lc_mc_search->num_results < 0)
+    {
+        return COND__NOT_FOUND;
+    }
+#endif /* SEARCH_TYPE_GLIB */
+    return COND__FOUND_OK;
+
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static mc_search__found_cond_t
+mc_search__regex_found_cond (mc_search_t * lc_mc_search, GString * search_str)
+{
+    gsize loop1;
+
+    for (loop1 = 0; loop1 < lc_mc_search->prepared.conditions->len; loop1++)
+    {
+        mc_search_cond_t *mc_search_cond;
+        mc_search__found_cond_t ret;
+
+        mc_search_cond =
+            (mc_search_cond_t *) g_ptr_array_index (lc_mc_search->prepared.conditions, loop1);
+
+        if (!mc_search_cond->regex_handle)
+            continue;
+
+        ret =
+            mc_search__regex_found_cond_one (lc_mc_search, mc_search_cond->regex_handle,
+                                             search_str);
+        if (ret != COND__NOT_FOUND)
+            return ret;
+    }
+    return COND__NOT_ALL_FOUND;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+mc_search_regex__get_max_num_of_replace_tokens (const gchar * str, gsize len)
+{
+    int max_token = 0;
+    gsize loop;
+    for (loop = 0; loop < len - 1; loop++)
+    {
+        if (str[loop] == '\\' && g_ascii_isdigit (str[loop + 1]))
+        {
+            if (strutils_is_char_escaped (str, &str[loop]))
+                continue;
+            if (max_token < str[loop + 1] - '0')
+                max_token = str[loop + 1] - '0';
+            continue;
+        }
+        if (str[loop] == '$' && str[loop + 1] == '{')
+        {
+            gsize tmp_len;
+
+            if (strutils_is_char_escaped (str, &str[loop]))
+                continue;
+
+            for (tmp_len = 0;
+                 loop + tmp_len + 2 < len && (str[loop + 2 + tmp_len] & (char) 0xf0) == 0x30;
+                 tmp_len++);
+
+            if (str[loop + 2 + tmp_len] == '}')
+            {
+                int tmp_token;
+                char *tmp_str;
+
+                tmp_str = g_strndup (&str[loop + 2], tmp_len);
+                tmp_token = atoi (tmp_str);
+                if (max_token < tmp_token)
+                    max_token = tmp_token;
+                g_free (tmp_str);
+            }
+        }
+    }
+    return max_token;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static char *
+mc_search_regex__get_token_by_num (const mc_search_t * lc_mc_search, gsize lc_index)
+{
+    int fnd_start = 0, fnd_end = 0;
+
+#ifdef SEARCH_TYPE_GLIB
+    g_match_info_fetch_pos (lc_mc_search->regex_match_info, lc_index, &fnd_start, &fnd_end);
+#else /* SEARCH_TYPE_GLIB */
+    fnd_start = lc_mc_search->iovector[lc_index * 2 + 0];
+    fnd_end = lc_mc_search->iovector[lc_index * 2 + 1];
+#endif /* SEARCH_TYPE_GLIB */
+
+    if (fnd_end == fnd_start)
+        return g_strdup ("");
+
+    return g_strndup (lc_mc_search->regex_buffer->str + fnd_start, fnd_end - fnd_start);
+
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+mc_search_regex__replace_handle_esc_seq (const GString * replace_str, const gsize current_pos,
+                                         gsize * skip_len, int *ret)
+{
+    char *curr_str = &(replace_str->str[current_pos]);
+    char c = curr_str[1];
+
+    if (replace_str->len > current_pos + 2)
+    {
+        if (c == '{')
+        {
+            for (*skip_len = 2; /* \{ */
+                 current_pos + *skip_len < replace_str->len && curr_str[*skip_len] >= '0'
+                 && curr_str[*skip_len] <= '7'; (*skip_len)++)
+                ;
+
+            if (current_pos + *skip_len < replace_str->len && curr_str[*skip_len] == '}')
+            {
+                (*skip_len)++;
+                *ret = REPLACE_PREPARE_T_ESCAPE_SEQ;
+                return FALSE;
+            }
+            else
+            {
+                *ret = REPLACE_PREPARE_T_NOTHING_SPECIAL;
+                return TRUE;
+            }
+        }
+
+        if (c == 'x')
+        {
+            *skip_len = 2;      /* \x */
+            c = curr_str[2];
+            if (c == '{')
+            {
+                for (*skip_len = 3;     /* \x{ */
+                     current_pos + *skip_len < replace_str->len
+                     && g_ascii_isxdigit ((guchar) curr_str[*skip_len]); (*skip_len)++)
+                    ;
+
+                if (current_pos + *skip_len < replace_str->len && curr_str[*skip_len] == '}')
+                {
+                    (*skip_len)++;
+                    *ret = REPLACE_PREPARE_T_ESCAPE_SEQ;
+                    return FALSE;
+                }
+                else
+                {
+                    *ret = REPLACE_PREPARE_T_NOTHING_SPECIAL;
+                    return TRUE;
+                }
+            }
+            else if (!g_ascii_isxdigit ((guchar) c))
+            {
+                *skip_len = 2;  /* \x without number behind */
+                *ret = REPLACE_PREPARE_T_NOTHING_SPECIAL;
+                return FALSE;
+            }
+            else
+            {
+                c = curr_str[3];
+                if (!g_ascii_isxdigit ((guchar) c))
+                    *skip_len = 3;      /* \xH */
+                else
+                    *skip_len = 4;      /* \xHH */
+                *ret = REPLACE_PREPARE_T_ESCAPE_SEQ;
+                return FALSE;
+            }
+        }
+    }
+
+    if (strchr ("ntvbrfa", c) != NULL)
+    {
+        *skip_len = 2;
+        *ret = REPLACE_PREPARE_T_ESCAPE_SEQ;
+        return FALSE;
+    }
+    return TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+mc_search_regex__process_replace_str (const GString * replace_str, const gsize current_pos,
+                                      gsize * skip_len, replace_transform_type_t * replace_flags)
+{
+    int ret = -1;
+    const char *curr_str = &(replace_str->str[current_pos]);
+
+    if (current_pos > replace_str->len)
+        return REPLACE_PREPARE_T_NOTHING_SPECIAL;
+
+    *skip_len = 0;
+
+    if (replace_str->len > current_pos + 2 && curr_str[0] == '$' && curr_str[1] == '{'
+        && (curr_str[2] & (char) 0xf0) == 0x30)
+    {
+        char *tmp_str;
+
+        if (strutils_is_char_escaped (replace_str->str, curr_str))
+        {
+            *skip_len = 1;
+            return REPLACE_PREPARE_T_NOTHING_SPECIAL;
+        }
+
+        for (*skip_len = 0;
+             current_pos + *skip_len + 2 < replace_str->len
+             && (curr_str[2 + *skip_len] & (char) 0xf0) == 0x30; (*skip_len)++)
+            ;
+
+        if (curr_str[2 + *skip_len] != '}')
+            return REPLACE_PREPARE_T_NOTHING_SPECIAL;
+
+        tmp_str = g_strndup (curr_str + 2, *skip_len);
+        if (tmp_str == NULL)
+            return REPLACE_PREPARE_T_NOTHING_SPECIAL;
+
+        ret = atoi (tmp_str);
+        g_free (tmp_str);
+
+        *skip_len += 3;         /* ${} */
+        return ret;             /* capture buffer index >= 0 */
+    }
+
+    if (curr_str[0] == '\\' && replace_str->len > current_pos + 1)
+    {
+        if (strutils_is_char_escaped (replace_str->str, curr_str))
+        {
+            *skip_len = 1;
+            return REPLACE_PREPARE_T_NOTHING_SPECIAL;
+        }
+
+        if (g_ascii_isdigit (curr_str[1]))
+        {
+            ret = g_ascii_digit_value (curr_str[1]);    /* capture buffer index >= 0 */
+            *skip_len = 2;      /* \\ and one digit */
+            return ret;
+        }
+
+        if (!mc_search_regex__replace_handle_esc_seq (replace_str, current_pos, skip_len, &ret))
+            return ret;
+
+        ret = REPLACE_PREPARE_T_REPLACE_FLAG;
+        *skip_len += 2;
+
+        switch (curr_str[1])
+        {
+        case 'U':
+            *replace_flags |= REPLACE_T_UPP_TRANSFORM;
+            *replace_flags &= ~REPLACE_T_LOW_TRANSFORM;
+            break;
+        case 'u':
+            *replace_flags |= REPLACE_T_UPP_TRANSFORM_CHAR;
+            break;
+        case 'L':
+            *replace_flags |= REPLACE_T_LOW_TRANSFORM;
+            *replace_flags &= ~REPLACE_T_UPP_TRANSFORM;
+            break;
+        case 'l':
+            *replace_flags |= REPLACE_T_LOW_TRANSFORM_CHAR;
+            break;
+        case 'E':
+            *replace_flags = REPLACE_T_NO_TRANSFORM;
+            break;
+        default:
+            ret = REPLACE_PREPARE_T_NOTHING_SPECIAL;
+            break;
+        }
+    }
+    return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_search_regex__process_append_str (GString * dest_str, const char *from, gsize len,
+                                     replace_transform_type_t * replace_flags)
+{
+    gsize loop;
+    gsize char_len;
+
+    if (len == (gsize) (-1))
+        len = strlen (from);
+
+    if (*replace_flags == REPLACE_T_NO_TRANSFORM)
+    {
+        g_string_append_len (dest_str, from, len);
+        return;
+    }
+
+    for (loop = 0; loop < len; loop += char_len)
+    {
+        GString *tmp_string = NULL;
+        GString *s;
+
+        s = mc_search__get_one_symbol (NULL, from + loop, len - loop, NULL);
+        char_len = s->len;
+
+        if ((*replace_flags & REPLACE_T_UPP_TRANSFORM_CHAR) != 0)
+        {
+            *replace_flags &= ~REPLACE_T_UPP_TRANSFORM_CHAR;
+            tmp_string = mc_search__toupper_case_str (NULL, s);
+            g_string_append_len (dest_str, tmp_string->str, tmp_string->len);
+        }
+        else if ((*replace_flags & REPLACE_T_LOW_TRANSFORM_CHAR) != 0)
+        {
+            *replace_flags &= ~REPLACE_T_LOW_TRANSFORM_CHAR;
+            tmp_string = mc_search__tolower_case_str (NULL, s);
+            g_string_append_len (dest_str, tmp_string->str, tmp_string->len);
+        }
+        else if ((*replace_flags & REPLACE_T_UPP_TRANSFORM) != 0)
+        {
+            tmp_string = mc_search__toupper_case_str (NULL, s);
+            g_string_append_len (dest_str, tmp_string->str, tmp_string->len);
+        }
+        else if ((*replace_flags & REPLACE_T_LOW_TRANSFORM) != 0)
+        {
+            tmp_string = mc_search__tolower_case_str (NULL, s);
+            g_string_append_len (dest_str, tmp_string->str, tmp_string->len);
+        }
+
+        g_string_free (s, TRUE);
+        if (tmp_string != NULL)
+            g_string_free (tmp_string, TRUE);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_search_regex__process_escape_sequence (GString * dest_str, const char *from, gsize len,
+                                          replace_transform_type_t * replace_flags,
+                                          gboolean is_utf8)
+{
+    gsize i = 0;
+    unsigned int c = 0;
+    char b;
+
+    if (len == (gsize) (-1))
+        len = strlen (from);
+    if (len == 0)
+        return;
+
+    if (from[i] == '{')
+        i++;
+    if (i >= len)
+        return;
+
+    if (from[i] == 'x')
+    {
+        i++;
+        if (i < len && from[i] == '{')
+            i++;
+        for (; i < len; i++)
+        {
+            if (from[i] >= '0' && from[i] <= '9')
+                c = c * 16 + from[i] - '0';
+            else if (from[i] >= 'a' && from[i] <= 'f')
+                c = c * 16 + 10 + from[i] - 'a';
+            else if (from[i] >= 'A' && from[i] <= 'F')
+                c = c * 16 + 10 + from[i] - 'A';
+            else
+                break;
+        }
+    }
+    else if (from[i] >= '0' && from[i] <= '7')
+        for (; i < len && from[i] >= '0' && from[i] <= '7'; i++)
+            c = c * 8 + from[i] - '0';
+    else
+    {
+        switch (from[i])
+        {
+        case 'n':
+            c = '\n';
+            break;
+        case 't':
+            c = '\t';
+            break;
+        case 'v':
+            c = '\v';
+            break;
+        case 'b':
+            c = '\b';
+            break;
+        case 'r':
+            c = '\r';
+            break;
+        case 'f':
+            c = '\f';
+            break;
+        case 'a':
+            c = '\a';
+            break;
+        default:
+            mc_search_regex__process_append_str (dest_str, from, len, replace_flags);
+            return;
+        }
+    }
+
+    if (c < 0x80 || !is_utf8)
+        g_string_append_c (dest_str, (char) c);
+    else if (c < 0x800)
+    {
+        b = 0xC0 | (c >> 6);
+        g_string_append_c (dest_str, b);
+        b = 0x80 | (c & 0x3F);
+        g_string_append_c (dest_str, b);
+    }
+    else if (c < 0x10000)
+    {
+        b = 0xE0 | (c >> 12);
+        g_string_append_c (dest_str, b);
+        b = 0x80 | ((c >> 6) & 0x3F);
+        g_string_append_c (dest_str, b);
+        b = 0x80 | (c & 0x3F);
+        g_string_append_c (dest_str, b);
+    }
+    else if (c < 0x10FFFF)
+    {
+        b = 0xF0 | (c >> 16);
+        g_string_append_c (dest_str, b);
+        b = 0x80 | ((c >> 12) & 0x3F);
+        g_string_append_c (dest_str, b);
+        b = 0x80 | ((c >> 6) & 0x3F);
+        g_string_append_c (dest_str, b);
+        b = 0x80 | (c & 0x3F);
+        g_string_append_c (dest_str, b);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mc_search__cond_struct_new_init_regex (const char *charset, mc_search_t * lc_mc_search,
+                                       mc_search_cond_t * mc_search_cond)
+{
+    if (lc_mc_search->whole_words && !lc_mc_search->is_entire_line)
+    {
+        /* NOTE: \b as word boundary doesn't allow search
+         * whole words with non-ASCII symbols.
+         * Update: Is it still true nowadays? Probably not. #2396, #3524 */
+        g_string_prepend (mc_search_cond->str, "(?<![\\p{L}\\p{N}_])");
+        g_string_append (mc_search_cond->str, "(?![\\p{L}\\p{N}_])");
+    }
+
+    {
+#ifdef SEARCH_TYPE_GLIB
+        GError *mcerror = NULL;
+        GRegexCompileFlags g_regex_options = G_REGEX_OPTIMIZE | G_REGEX_DOTALL;
+
+        if (str_isutf8 (charset) && mc_global.utf8_display)
+        {
+            if (!lc_mc_search->is_case_sensitive)
+                g_regex_options |= G_REGEX_CASELESS;
+        }
+        else
+        {
+            g_regex_options |= G_REGEX_RAW;
+
+            if (!lc_mc_search->is_case_sensitive)
+            {
+                GString *tmp;
+
+                tmp = mc_search_cond->str;
+                mc_search_cond->str = mc_search__cond_struct_new_regex_ci_str (charset, tmp);
+                g_string_free (tmp, TRUE);
+            }
+        }
+
+        mc_search_cond->regex_handle =
+            g_regex_new (mc_search_cond->str->str, g_regex_options, 0, &mcerror);
+
+        if (mcerror != NULL)
+        {
+            lc_mc_search->error = MC_SEARCH_E_REGEX_COMPILE;
+            g_free (lc_mc_search->error_str);
+            lc_mc_search->error_str =
+                str_conv_gerror_message (mcerror, _("Regular expression error"));
+            g_error_free (mcerror);
+            return;
+        }
+#else /* SEARCH_TYPE_GLIB */
+        const char *error;
+        int erroffset;
+        int pcre_options = PCRE_EXTRA | PCRE_MULTILINE;
+
+        if (str_isutf8 (charset) && mc_global.utf8_display)
+        {
+            pcre_options |= PCRE_UTF8;
+            if (!lc_mc_search->is_case_sensitive)
+                pcre_options |= PCRE_CASELESS;
+        }
+        else if (!lc_mc_search->is_case_sensitive)
+        {
+            GString *tmp;
+
+            tmp = mc_search_cond->str;
+            mc_search_cond->str = mc_search__cond_struct_new_regex_ci_str (charset, tmp);
+            g_string_free (tmp, TRUE);
+        }
+
+        mc_search_cond->regex_handle =
+            pcre_compile (mc_search_cond->str->str, pcre_options, &error, &erroffset, NULL);
+        if (mc_search_cond->regex_handle == NULL)
+        {
+            mc_search_set_error (lc_mc_search, MC_SEARCH_E_REGEX_COMPILE, "%s", error);
+            return;
+        }
+        lc_mc_search->regex_match_info = pcre_study (mc_search_cond->regex_handle, 0, &error);
+        if (lc_mc_search->regex_match_info == NULL && error != NULL)
+        {
+            mc_search_set_error (lc_mc_search, MC_SEARCH_E_REGEX_COMPILE, "%s", error);
+            MC_PTR_FREE (mc_search_cond->regex_handle);
+            return;
+        }
+#endif /* SEARCH_TYPE_GLIB */
+    }
+
+    lc_mc_search->is_utf8 = str_isutf8 (charset);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_search__run_regex (mc_search_t * lc_mc_search, const void *user_data,
+                      gsize start_search, gsize end_search, gsize * found_len)
+{
+    mc_search_cbret_t ret = MC_SEARCH_CB_NOTFOUND;
+    gsize current_pos, virtual_pos;
+    gint start_pos;
+    gint end_pos;
+
+    if (lc_mc_search->regex_buffer != NULL)
+        g_string_set_size (lc_mc_search->regex_buffer, 0);
+    else
+        lc_mc_search->regex_buffer = g_string_sized_new (64);
+
+    virtual_pos = current_pos = start_search;
+    while (virtual_pos <= end_search)
+    {
+        g_string_set_size (lc_mc_search->regex_buffer, 0);
+        lc_mc_search->start_buffer = current_pos;
+
+        if (lc_mc_search->search_fn != NULL)
+        {
+            while (TRUE)
+            {
+                int current_chr = '\n'; /* stop search symbol */
+
+                ret = lc_mc_search->search_fn (user_data, current_pos, &current_chr);
+
+                if (ret == MC_SEARCH_CB_ABORT)
+                    break;
+
+                if (ret == MC_SEARCH_CB_INVALID)
+                    continue;
+
+                current_pos++;
+
+                if (ret == MC_SEARCH_CB_SKIP)
+                    continue;
+
+                virtual_pos++;
+
+                g_string_append_c (lc_mc_search->regex_buffer, (char) current_chr);
+
+                if ((char) current_chr == '\n' || virtual_pos > end_search)
+                    break;
+            }
+        }
+        else
+        {
+            /* optimization for standard case (for search from file manager)
+             *  where there is no MC_SEARCH_CB_INVALID or MC_SEARCH_CB_SKIP
+             *  return codes, so we can copy line at regex buffer all at once
+             */
+            while (TRUE)
+            {
+                const char current_chr = ((const char *) user_data)[current_pos];
+
+                if (current_chr == '\0')
+                    break;
+
+                current_pos++;
+
+                if (current_chr == '\n' || current_pos > end_search)
+                    break;
+            }
+
+            /* use virtual_pos as index of start of current chunk */
+            g_string_append_len (lc_mc_search->regex_buffer, (const char *) user_data + virtual_pos,
+                                 current_pos - virtual_pos);
+            virtual_pos = current_pos;
+        }
+
+        switch (mc_search__regex_found_cond (lc_mc_search, lc_mc_search->regex_buffer))
+        {
+        case COND__FOUND_OK:
+#ifdef SEARCH_TYPE_GLIB
+            g_match_info_fetch_pos (lc_mc_search->regex_match_info, 0, &start_pos, &end_pos);
+#else /* SEARCH_TYPE_GLIB */
+            start_pos = lc_mc_search->iovector[0];
+            end_pos = lc_mc_search->iovector[1];
+#endif /* SEARCH_TYPE_GLIB */
+            if (found_len != NULL)
+                *found_len = end_pos - start_pos;
+            lc_mc_search->normal_offset = lc_mc_search->start_buffer + start_pos;
+            return TRUE;
+        case COND__NOT_ALL_FOUND:
+            break;
+        default:
+            g_string_free (lc_mc_search->regex_buffer, TRUE);
+            lc_mc_search->regex_buffer = NULL;
+            return FALSE;
+        }
+
+        if ((lc_mc_search->update_fn != NULL) &&
+            ((lc_mc_search->update_fn) (user_data, current_pos) == MC_SEARCH_CB_ABORT))
+            ret = MC_SEARCH_CB_ABORT;
+
+        if (ret == MC_SEARCH_CB_ABORT || ret == MC_SEARCH_CB_NOTFOUND)
+            break;
+    }
+
+    g_string_free (lc_mc_search->regex_buffer, TRUE);
+    lc_mc_search->regex_buffer = NULL;
+
+    MC_PTR_FREE (lc_mc_search->error_str);
+    lc_mc_search->error = ret == MC_SEARCH_CB_ABORT ? MC_SEARCH_E_ABORT : MC_SEARCH_E_NOTFOUND;
+
+    return FALSE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+GString *
+mc_search_regex_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
+{
+    GString *ret;
+
+    int num_replace_tokens;
+    gsize loop;
+    gsize prev = 0;
+    replace_transform_type_t replace_flags = REPLACE_T_NO_TRANSFORM;
+
+    num_replace_tokens =
+        mc_search_regex__get_max_num_of_replace_tokens (replace_str->str, replace_str->len);
+
+    if (lc_mc_search->num_results < 0)
+        return mc_g_string_dup (replace_str);
+
+    if (num_replace_tokens > lc_mc_search->num_results - 1
+        || num_replace_tokens > MC_SEARCH__NUM_REPLACE_ARGS)
+    {
+        mc_search_set_error (lc_mc_search, MC_SEARCH_E_REGEX_REPLACE, "%s",
+                             _(STR_E_RPL_NOT_EQ_TO_FOUND));
+        return NULL;
+    }
+
+    ret = g_string_sized_new (64);
+
+    for (loop = 0; loop < replace_str->len - 1; loop++)
+    {
+        int lc_index;
+        gchar *tmp_str;
+        gsize len = 0;
+
+        lc_index = mc_search_regex__process_replace_str (replace_str, loop, &len, &replace_flags);
+
+        if (lc_index == REPLACE_PREPARE_T_NOTHING_SPECIAL)
+        {
+            if (len != 0)
+            {
+                mc_search_regex__process_append_str (ret, replace_str->str + prev, loop - prev,
+                                                     &replace_flags);
+                mc_search_regex__process_append_str (ret, replace_str->str + loop + 1, len - 1,
+                                                     &replace_flags);
+                prev = loop + len;
+                loop = prev - 1;        /* prepare to loop++ */
+            }
+
+            continue;
+        }
+
+        if (lc_index == REPLACE_PREPARE_T_REPLACE_FLAG)
+        {
+            if (loop != 0)
+                mc_search_regex__process_append_str (ret, replace_str->str + prev, loop - prev,
+                                                     &replace_flags);
+            prev = loop + len;
+            loop = prev - 1;    /* prepare to loop++ */
+            continue;
+        }
+
+        /* escape sequence */
+        if (lc_index == REPLACE_PREPARE_T_ESCAPE_SEQ)
+        {
+            mc_search_regex__process_append_str (ret, replace_str->str + prev, loop - prev,
+                                                 &replace_flags);
+            /* call process_escape_sequence without starting '\\' */
+            mc_search_regex__process_escape_sequence (ret, replace_str->str + loop + 1, len - 1,
+                                                      &replace_flags, lc_mc_search->is_utf8);
+            prev = loop + len;
+            loop = prev - 1;    /* prepare to loop++ */
+            continue;
+        }
+
+        /* invalid capture buffer number */
+        if (lc_index > lc_mc_search->num_results)
+        {
+            g_string_free (ret, TRUE);
+            mc_search_set_error (lc_mc_search, MC_SEARCH_E_REGEX_REPLACE,
+                                 _(STR_E_RPL_INVALID_TOKEN), lc_index);
+            return NULL;
+        }
+
+        tmp_str = mc_search_regex__get_token_by_num (lc_mc_search, lc_index);
+
+        if (loop != 0)
+            mc_search_regex__process_append_str (ret, replace_str->str + prev, loop - prev,
+                                                 &replace_flags);
+
+        mc_search_regex__process_append_str (ret, tmp_str, -1, &replace_flags);
+        g_free (tmp_str);
+
+        prev = loop + len;
+        loop = prev - 1;        /* prepare to loop++ */
+    }
+
+    mc_search_regex__process_append_str (ret, replace_str->str + prev, replace_str->len - prev,
+                                         &replace_flags);
+
+    return ret;
+}
diff --git a/lib/search/search.c b/lib/search/search.c
new file mode 100644
index 0000000..3fdbc26
--- /dev/null
+++ b/lib/search/search.c
@@ -0,0 +1,521 @@
+/*
+   Search text engine.
+   Interface functions
+
+   Copyright (C) 2009-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Slava Zanko <slavazanko@gmail.com>, 2009
+   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 <stdarg.h>
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include "lib/global.h"
+#include "lib/strutil.h"
+#include "lib/search.h"
+#include "lib/util.h"
+#ifdef HAVE_CHARSET
+#include "lib/charsets.h"
+#endif
+
+#include "internal.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+static const mc_search_type_str_t mc_search__list_types[] = {
+    {N_("No&rmal"), MC_SEARCH_T_NORMAL},
+    {N_("Re&gular expression"), MC_SEARCH_T_REGEX},
+    {N_("He&xadecimal"), MC_SEARCH_T_HEX},
+    {N_("Wil&dcard search"), MC_SEARCH_T_GLOB},
+    {NULL, MC_SEARCH_T_INVALID}
+};
+
+/*** file scope functions ************************************************************************/
+
+static mc_search_cond_t *
+mc_search__cond_struct_new (mc_search_t * lc_mc_search, const GString * str, const char *charset)
+{
+    mc_search_cond_t *mc_search_cond;
+
+    mc_search_cond = g_malloc0 (sizeof (mc_search_cond_t));
+    mc_search_cond->str = mc_g_string_dup (str);
+    mc_search_cond->charset = g_strdup (charset);
+
+    switch (lc_mc_search->search_type)
+    {
+    case MC_SEARCH_T_GLOB:
+        mc_search__cond_struct_new_init_glob (charset, lc_mc_search, mc_search_cond);
+        break;
+    case MC_SEARCH_T_NORMAL:
+        mc_search__cond_struct_new_init_normal (charset, lc_mc_search, mc_search_cond);
+        break;
+    case MC_SEARCH_T_REGEX:
+        mc_search__cond_struct_new_init_regex (charset, lc_mc_search, mc_search_cond);
+        break;
+    case MC_SEARCH_T_HEX:
+        mc_search__cond_struct_new_init_hex (charset, lc_mc_search, mc_search_cond);
+        break;
+    default:
+        break;
+    }
+    return mc_search_cond;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_search__cond_struct_free (mc_search_cond_t * mc_search_cond)
+{
+    if (mc_search_cond->upper != NULL)
+        g_string_free (mc_search_cond->upper, TRUE);
+
+    if (mc_search_cond->lower != NULL)
+        g_string_free (mc_search_cond->lower, TRUE);
+
+    g_string_free (mc_search_cond->str, TRUE);
+    g_free (mc_search_cond->charset);
+
+#ifdef SEARCH_TYPE_GLIB
+    if (mc_search_cond->regex_handle != NULL)
+        g_regex_unref (mc_search_cond->regex_handle);
+#else /* SEARCH_TYPE_GLIB */
+    g_free (mc_search_cond->regex_handle);
+#endif /* SEARCH_TYPE_GLIB */
+
+    g_free (mc_search_cond);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mc_search__conditions_free (GPtrArray * array)
+{
+    g_ptr_array_foreach (array, (GFunc) mc_search__cond_struct_free, NULL);
+    g_ptr_array_free (array, TRUE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+/* Init search descriptor.
+ *
+ * @param original pattern to search
+ * @param original_charset charset of #original. If NULL then cp_display will be used
+ *
+ * @return new mc_search_t object. Use #mc_search_free() to free it.
+ */
+
+mc_search_t *
+mc_search_new (const gchar * original, const gchar * original_charset)
+{
+    if (original == NULL)
+        return NULL;
+
+    return mc_search_new_len (original, strlen (original), original_charset);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* Init search descriptor.
+ *
+ * @param original pattern to search
+ * @param original_len length of #original or -1 if #original is NULL-terminated
+ * @param original_charset charset of #original. If NULL then cp_display will be used
+ *
+ * @return new mc_search_t object. Use #mc_search_free() to free it.
+ */
+
+mc_search_t *
+mc_search_new_len (const gchar * original, gsize original_len, const gchar * original_charset)
+{
+    mc_search_t *lc_mc_search;
+
+    if (original == NULL || original_len == 0)
+        return NULL;
+
+    lc_mc_search = g_new0 (mc_search_t, 1);
+    lc_mc_search->original.str = g_string_new_len (original, original_len);
+#ifdef HAVE_CHARSET
+    lc_mc_search->original.charset =
+        g_strdup (original_charset != NULL
+                  && *original_charset != '\0' ? original_charset : cp_display);
+#else
+    (void) original_charset;
+#endif
+
+    return lc_mc_search;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mc_search_free (mc_search_t * lc_mc_search)
+{
+    if (lc_mc_search == NULL)
+        return;
+
+    g_string_free (lc_mc_search->original.str, TRUE);
+#ifdef HAVE_CHARSET
+    g_free (lc_mc_search->original.charset);
+#endif
+    g_free (lc_mc_search->error_str);
+
+    if (lc_mc_search->prepared.conditions != NULL)
+        mc_search__conditions_free (lc_mc_search->prepared.conditions);
+
+#ifdef SEARCH_TYPE_GLIB
+    if (lc_mc_search->regex_match_info != NULL)
+        g_match_info_free (lc_mc_search->regex_match_info);
+#else /* SEARCH_TYPE_GLIB */
+    g_free (lc_mc_search->regex_match_info);
+#endif /* SEARCH_TYPE_GLIB */
+
+    if (lc_mc_search->regex_buffer != NULL)
+        g_string_free (lc_mc_search->regex_buffer, TRUE);
+
+    g_free (lc_mc_search);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_search_prepare (mc_search_t * lc_mc_search)
+{
+    GPtrArray *ret;
+
+    if (lc_mc_search->prepared.conditions != NULL)
+        return lc_mc_search->prepared.result;
+
+    ret = g_ptr_array_new ();
+#ifdef HAVE_CHARSET
+    if (!lc_mc_search->is_all_charsets)
+        g_ptr_array_add (ret,
+                         mc_search__cond_struct_new (lc_mc_search, lc_mc_search->original.str,
+                                                     lc_mc_search->original.charset));
+    else
+    {
+        gsize loop1;
+
+        for (loop1 = 0; loop1 < codepages->len; loop1++)
+        {
+            const char *id;
+
+            id = ((codepage_desc *) g_ptr_array_index (codepages, loop1))->id;
+            if (g_ascii_strcasecmp (id, lc_mc_search->original.charset) == 0)
+                g_ptr_array_add (ret,
+                                 mc_search__cond_struct_new (lc_mc_search,
+                                                             lc_mc_search->original.str,
+                                                             lc_mc_search->original.charset));
+            else
+            {
+                GString *buffer;
+
+                buffer =
+                    mc_search__recode_str (lc_mc_search->original.str->str,
+                                           lc_mc_search->original.str->len,
+                                           lc_mc_search->original.charset, id);
+                g_ptr_array_add (ret, mc_search__cond_struct_new (lc_mc_search, buffer, id));
+                g_string_free (buffer, TRUE);
+            }
+        }
+    }
+#else
+    g_ptr_array_add (ret,
+                     mc_search__cond_struct_new (lc_mc_search, lc_mc_search->original.str,
+                                                 str_detect_termencoding ()));
+#endif
+    lc_mc_search->prepared.conditions = ret;
+    lc_mc_search->prepared.result = (lc_mc_search->error == MC_SEARCH_E_OK);
+
+    return lc_mc_search->prepared.result;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/**
+ * Carries out the search.
+ *
+ * Returns TRUE if found.
+ *
+ * Returns FALSE if not found. In this case, lc_mc_search->error reveals
+ * the reason:
+ *
+ *   - MC_SEARCH_E_NOTFOUND: the pattern isn't in the subject string.
+ *   - MC_SEARCH_E_ABORT: the user aborted the search.
+ *   - For any other reason (but not for the above two!): the description
+ *     is in lc_mc_search->error_str.
+ */
+gboolean
+mc_search_run (mc_search_t * lc_mc_search, const void *user_data,
+               gsize start_search, gsize end_search, gsize * found_len)
+{
+    gboolean ret = FALSE;
+
+    if (lc_mc_search == NULL || user_data == NULL)
+        return FALSE;
+    if (!mc_search_is_type_avail (lc_mc_search->search_type))
+    {
+        mc_search_set_error (lc_mc_search, MC_SEARCH_E_INPUT, "%s", _(STR_E_UNKNOWN_TYPE));
+        return FALSE;
+    }
+#ifdef SEARCH_TYPE_GLIB
+    if (lc_mc_search->regex_match_info != NULL)
+    {
+        g_match_info_free (lc_mc_search->regex_match_info);
+        lc_mc_search->regex_match_info = NULL;
+    }
+#endif /* SEARCH_TYPE_GLIB */
+
+    mc_search_set_error (lc_mc_search, MC_SEARCH_E_OK, NULL);
+
+    if (!mc_search_prepare (lc_mc_search))
+        return FALSE;
+
+    switch (lc_mc_search->search_type)
+    {
+    case MC_SEARCH_T_NORMAL:
+        ret = mc_search__run_normal (lc_mc_search, user_data, start_search, end_search, found_len);
+        break;
+    case MC_SEARCH_T_REGEX:
+        ret = mc_search__run_regex (lc_mc_search, user_data, start_search, end_search, found_len);
+        break;
+    case MC_SEARCH_T_GLOB:
+        ret = mc_search__run_glob (lc_mc_search, user_data, start_search, end_search, found_len);
+        break;
+    case MC_SEARCH_T_HEX:
+        ret = mc_search__run_hex (lc_mc_search, user_data, start_search, end_search, found_len);
+        break;
+    default:
+        break;
+    }
+    return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_search_is_type_avail (mc_search_type_t search_type)
+{
+    switch (search_type)
+    {
+    case MC_SEARCH_T_GLOB:
+    case MC_SEARCH_T_NORMAL:
+    case MC_SEARCH_T_REGEX:
+    case MC_SEARCH_T_HEX:
+        return TRUE;
+    default:
+        break;
+    }
+    return FALSE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+const mc_search_type_str_t *
+mc_search_types_list_get (size_t * num)
+{
+    /* don't count last NULL item */
+    if (num != NULL)
+        *num = G_N_ELEMENTS (mc_search__list_types) - 1;
+
+    return mc_search__list_types;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+GString *
+mc_search_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
+{
+    GString *ret;
+
+    if (replace_str == NULL || replace_str->len == 0)
+        return g_string_new ("");
+
+    if (lc_mc_search == NULL)
+        return mc_g_string_dup (replace_str);
+
+    switch (lc_mc_search->search_type)
+    {
+    case MC_SEARCH_T_REGEX:
+        ret = mc_search_regex_prepare_replace_str (lc_mc_search, replace_str);
+        break;
+    case MC_SEARCH_T_GLOB:
+        ret = mc_search_glob_prepare_replace_str (lc_mc_search, replace_str);
+        break;
+    case MC_SEARCH_T_NORMAL:
+        ret = mc_search_normal_prepare_replace_str (lc_mc_search, replace_str);
+        break;
+    case MC_SEARCH_T_HEX:
+        ret = mc_search_hex_prepare_replace_str (lc_mc_search, replace_str);
+        break;
+    default:
+        ret = mc_g_string_dup (replace_str);
+        break;
+    }
+    return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+char *
+mc_search_prepare_replace_str2 (mc_search_t * lc_mc_search, const char *replace_str)
+{
+    GString *ret;
+    GString *replace_str2;
+
+    replace_str2 = g_string_new (replace_str);
+    ret = mc_search_prepare_replace_str (lc_mc_search, replace_str2);
+    g_string_free (replace_str2, TRUE);
+    return (ret != NULL) ? g_string_free (ret, FALSE) : NULL;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_search_is_fixed_search_str (const mc_search_t * lc_mc_search)
+{
+    if (lc_mc_search == NULL)
+        return FALSE;
+    switch (lc_mc_search->search_type)
+    {
+    case MC_SEARCH_T_REGEX:
+    case MC_SEARCH_T_GLOB:
+        return FALSE;
+    default:
+        return TRUE;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* Search specified pattern in specified string.
+ *
+ * @param pattern string to search
+ * @param pattern_charset charset of #pattern. If NULL then cp_display will be used
+ * @param str string where search #pattern
+ * @param search type (normal, regex, hex or glob)
+ *
+ * @return TRUE if found is successful, FALSE otherwise.
+ */
+
+gboolean
+mc_search (const gchar * pattern, const gchar * pattern_charset, const gchar * str,
+           mc_search_type_t type)
+{
+    gboolean ret;
+    mc_search_t *search;
+
+    if (str == NULL)
+        return FALSE;
+
+    search = mc_search_new (pattern, pattern_charset);
+    if (search == NULL)
+        return FALSE;
+
+    search->search_type = type;
+    search->is_case_sensitive = TRUE;
+
+    if (type == MC_SEARCH_T_GLOB)
+        search->is_entire_line = TRUE;
+
+    ret = mc_search_run (search, str, 0, strlen (str), NULL);
+    mc_search_free (search);
+    return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+mc_search_getstart_result_by_num (mc_search_t * lc_mc_search, int lc_index)
+{
+    if (lc_mc_search == NULL)
+        return 0;
+    if (lc_mc_search->search_type == MC_SEARCH_T_NORMAL)
+        return 0;
+#ifdef SEARCH_TYPE_GLIB
+    {
+        gint start_pos;
+        gint end_pos;
+
+        g_match_info_fetch_pos (lc_mc_search->regex_match_info, lc_index, &start_pos, &end_pos);
+        return (int) start_pos;
+    }
+#else /* SEARCH_TYPE_GLIB */
+    return lc_mc_search->iovector[lc_index * 2];
+#endif /* SEARCH_TYPE_GLIB */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+int
+mc_search_getend_result_by_num (mc_search_t * lc_mc_search, int lc_index)
+{
+    if (lc_mc_search == NULL)
+        return 0;
+    if (lc_mc_search->search_type == MC_SEARCH_T_NORMAL)
+        return 0;
+#ifdef SEARCH_TYPE_GLIB
+    {
+        gint start_pos;
+        gint end_pos;
+
+        g_match_info_fetch_pos (lc_mc_search->regex_match_info, lc_index, &start_pos, &end_pos);
+        return (int) end_pos;
+    }
+#else /* SEARCH_TYPE_GLIB */
+    return lc_mc_search->iovector[lc_index * 2 + 1];
+#endif /* SEARCH_TYPE_GLIB */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Replace an old error code and message of an mc_search_t object.
+ *
+ * @param mc_search mc_search_t object
+ * @param code error code, one of mc_search_error_t values
+ * @param format format of error message. If NULL, the old error string is free'd and become NULL
+ */
+
+void
+mc_search_set_error (mc_search_t * lc_mc_search, mc_search_error_t code, const gchar * format, ...)
+{
+    lc_mc_search->error = code;
+
+    MC_PTR_FREE (lc_mc_search->error_str);
+
+    if (format != NULL)
+    {
+        va_list args;
+
+        va_start (args, format);
+        lc_mc_search->error_str = g_strdup_vprintf (format, args);
+        va_end (args);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */