1 files changed, 104 insertions, 0 deletions
diff --git a/lib/strutil/replace.c b/lib/strutil/replace.c
new file mode 100644
index 0000000..99356ee
--- /dev/null
+++ b/lib/strutil/replace.c
@@ -0,0 +1,104 @@
+/*
+   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);
+}
+
+/* --------------------------------------------------------------------------------------------- */