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Merge pull request #78529 from Chaosus/string_reverse

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Add `String.reverse` method
This commit is contained in:
Rémi Verschelde 2023-08-16 16:53:40 +02:00
commit 20e24bd2bb
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6 changed files with 36 additions and 0 deletions
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17
core/string/ustring.cpp
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@ -3635,6 +3635,23 @@ 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;

1
core/string/ustring.h
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@ -305,6 +305,7 @@ 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;

1
core/variant/variant_call.cpp
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@ -1659,6 +1659,7 @@ static void _register_variant_builtin_methods() {
bind_string_methodv(replace, static_cast<String (String::*)(const String &, const String &) const>(&String::replace), sarray("what", "forwhat"), varray());
bind_string_method(replacen, sarray("what", "forwhat"), varray());
bind_string_method(repeat, sarray("count"), varray());
bind_string_method(reverse, sarray(), varray());
bind_string_method(insert, sarray("position", "what"), varray());
bind_string_method(erase, sarray("position", "chars"), varray(1));
bind_string_method(capitalize, sarray(), varray());

6
doc/classes/String.xml
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@ -720,6 +720,12 @@
Replaces all [b]case-insensitive[/b] occurrences of [param what] inside the string with the given [param forwhat].
</description>
</method>
<method name="reverse" qualifiers="const">
<return type="String" />
<description>
Returns the copy of this string in reverse order.
</description>
</method>
<method name="rfind" qualifiers="const">
<return type="int" />
<param index="0" name="what" type="String" />

6
doc/classes/StringName.xml
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@ -627,6 +627,12 @@
Replaces all [b]case-insensitive[/b] occurrences of [param what] inside the string with the given [param forwhat].
</description>
</method>
<method name="reverse" qualifiers="const">
<return type="String" />
<description>
Returns the copy of this string in reverse order.
</description>
</method>
<method name="rfind" qualifiers="const">
<return type="int" />
<param index="0" name="what" type="String" />

5
tests/core/string/test_string.h
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@ -1609,6 +1609,11 @@ TEST_CASE("[String] Repeat") {
CHECK(t == s);
}
TEST_CASE("[String] Reverse") {
String s = "Abcd";
CHECK(s.reverse() == "dcbA");
}
TEST_CASE("[String] SHA1/SHA256/MD5") {
String s = "Godot";
String sha1 = "a1e91f39b9fce6a9998b14bdbe2aa2b39dc2d201";