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-rw-r--r--lib/strutil/replace.c104
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diff --git a/lib/strutil/replace.c b/lib/strutil/replace.c
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+/*
+ Functions for replacing substrings in strings.
+
+ Copyright (C) 2013-2023
+ Free Software Foundation, Inc.
+
+ Written by:
+ Slava Zanko <slavazanko@gmail.com>, 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 "lib/global.h"
+#include "lib/strescape.h"
+#include "lib/strutil.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** forward declarations (file scope functions) *************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Replace all substrings 'needle' in string 'haystack' by 'replacement'.
+ * If the 'needle' in the 'haystack' is escaped by backslash,
+ * then this occurrence isn't be replaced.
+ *
+ * @param haystack string contains substrings for replacement. Cannot be NULL.
+ * @param needle string for search. Cannot be NULL.
+ * @param replacement string for replace. Cannot be NULL.
+ * @return newly allocated string with replaced substrings or NULL if @haystack is empty.
+ */
+
+char *
+str_replace_all (const char *haystack, const char *needle, const char *replacement)
+{
+ size_t needle_len, replacement_len;
+ GString *return_str = NULL;
+ char *needle_in_str;
+
+ needle_len = strlen (needle);
+ replacement_len = strlen (replacement);
+
+ while ((needle_in_str = strstr (haystack, needle)) != NULL)
+ {
+ if (return_str == NULL)
+ return_str = g_string_sized_new (32);
+
+ if (strutils_is_char_escaped (haystack, needle_in_str))
+ {
+ char *backslash = needle_in_str - 1;
+
+ if (haystack != backslash)
+ g_string_append_len (return_str, haystack, backslash - haystack);
+ g_string_append_len (return_str, needle_in_str, needle_in_str - backslash);
+ haystack = needle_in_str + 1;
+ }
+ else
+ {
+ if (needle_in_str != haystack)
+ g_string_append_len (return_str, haystack, needle_in_str - haystack);
+ g_string_append_len (return_str, replacement, replacement_len);
+ haystack = needle_in_str + needle_len;
+ }
+ }
+
+ if (*haystack != '\0')
+ {
+ if (return_str == NULL)
+ return strdup (haystack);
+
+ g_string_append (return_str, haystack);
+ }
+
+ return (return_str != NULL ? g_string_free (return_str, FALSE) : NULL);
+}
+
+/* --------------------------------------------------------------------------------------------- */