Add `String.reverse` method

2 files changed, 18 insertions, 0 deletions

diff --git a/core/string/ustring.cpp b/core/string/ustring.cpp
index c276f20f99..6a77f077e5 100644
--- a/core/string/ustring.cpp
+++ b/core/string/ustring.cpp
@@ -3616,6 +3616,23 @@ String String::repeat(int p_count) const {
 	return new_string;
 }
 
+String String::reverse() const {
+	int len = length();
+	if (len <= 1) {
+		return *this;
+	}
+	String new_string;
+	new_string.resize(len + 1);
+
+	const char32_t *src = ptr();
+	char32_t *dst = new_string.ptrw();
+	for (int i = 0; i < len; i++) {
+		dst[i] = src[len - i - 1];
+	}
+	dst[len] = _null;
+	return new_string;
+}
+
 String String::left(int p_len) const {
 	if (p_len < 0) {
 		p_len = length() + p_len;
diff --git a/core/string/ustring.h b/core/string/ustring.h
index 782ca47507..317fef6232 100644
--- a/core/string/ustring.h
+++ b/core/string/ustring.h
@@ -304,6 +304,7 @@ public:
 	String replace(const char *p_key, const char *p_with) const;
 	String replacen(const String &p_key, const String &p_with) const;
 	String repeat(int p_count) const;
+	String reverse() const;
 	String insert(int p_at_pos, const String &p_string) const;
 	String erase(int p_pos, int p_chars = 1) const;
 	String pad_decimals(int p_digits) const;