1 files changed, 117 insertions, 0 deletions
diff --git a/lib/strutil/replace.c b/lib/strutil/replace.c
new file mode 100644
index 0000000..48255e5
--- /dev/null
+++ b/lib/strutil/replace.c
@@ -0,0 +1,117 @@
+/*
+   Functions for replacing substrings in strings.
+
+   Copyright (C) 2013-2022
+   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 ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static GString *
+str_ptr_array_join (const GPtrArray * str_splints)
+{
+    GString *return_str;
+    guint i;
+
+    return_str = g_string_sized_new (32);
+    for (i = 0; i < str_splints->len; i++)
+        g_string_append (return_str, g_ptr_array_index (str_splints, i));
+
+    return return_str;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Replace all substrings 'needle' in string 'haystack' by 'replacement'.
+ * If the 'needle' in the 'haystack' will be escaped by backslash,
+ * then this occurrence isn't be replaced.
+ *
+ * @param haystack    string contains substrings for replacement
+ * @param needle      string for search
+ * @param replacement string for replace
+ * @return newly allocated string with replaced substrings
+ */
+
+char *
+str_replace_all (const char *haystack, const char *needle, const char *replacement)
+{
+    size_t needle_len;
+    GPtrArray *str_splints;
+    GString *return_str;
+
+    needle_len = strlen (needle);
+
+    str_splints = g_ptr_array_new_with_free_func (g_free);
+
+    while (TRUE)
+    {
+        char *needle_in_str;
+
+        needle_in_str = strstr (haystack, needle);
+        if (needle_in_str == NULL)
+        {
+            if (*haystack != '\0')
+                g_ptr_array_add (str_splints, g_strdup (haystack));
+            break;
+        }
+
+        if (strutils_is_char_escaped (haystack, needle_in_str))
+        {
+            char *backslash = needle_in_str - 1;
+
+            if (haystack != backslash)
+                g_ptr_array_add (str_splints, g_strndup (haystack, backslash - haystack));
+
+            g_ptr_array_add (str_splints, g_strndup (backslash + 1, needle_in_str - backslash));
+            haystack = needle_in_str + 1;
+            continue;
+        }
+        if (needle_in_str - haystack > 0)
+            g_ptr_array_add (str_splints, g_strndup (haystack, needle_in_str - haystack));
+        g_ptr_array_add (str_splints, g_strdup (replacement));
+        haystack = needle_in_str + needle_len;
+    }
+    return_str = str_ptr_array_join (str_splints);
+
+    g_ptr_array_free (str_splints, TRUE);
+
+    return g_string_free (return_str, FALSE);
+}
+
+/* --------------------------------------------------------------------------------------------- */