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AK: Add String::from_utf8_with_replacement_character

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This takes a byte sequence and converts it to a UTF-8 string with the
replacement character.
This commit is contained in:
Shannon Booth 2024-08-10 17:16:01 +12:00 committed by Andreas Kling
parent 84a09476ba
commit 033ea0e7fb
Notes: github-actions[bot] 2024-08-10 08:47:28 +00:00 
Author: https://github.com/shannonbooth
Commit: https://github.com/LadybirdBrowser/ladybird/commit/033ea0e7fb0
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1023
Reviewed-by: https://github.com/awesomekling
3 changed files with 26 additions and 0 deletions
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10
AK/String.cpp
View file

@ -20,6 +20,16 @@
namespace AK {
String String::from_utf8_with_replacement_character(StringView view)
{
StringBuilder builder;
for (auto c : Utf8View { view })
builder.append_code_point(c);
return builder.to_string_without_validation();
}
String String::from_utf8_without_validation(ReadonlyBytes bytes)
{
String result;

3
AK/String.h
View file

@ -51,6 +51,9 @@ public:
// Creates a new String from a sequence of UTF-8 encoded code points.
static ErrorOr<String> from_utf8(StringView);
// Creates a new String using the replacement character for invalid bytes
[[nodiscard]] static String from_utf8_with_replacement_character(StringView);
template<typename T>
requires(IsOneOf<RemoveCVReference<T>, ByteString, DeprecatedFlyString, FlyString, String>)
static ErrorOr<String> from_utf8(T&&) = delete;

13
Tests/AK/TestString.cpp
View file

@ -173,6 +173,19 @@ TEST_CASE(invalid_utf8)
EXPECT(string3.error().string_literal().contains("Input was not valid UTF-8"sv));
}
TEST_CASE(with_replacement_character)
{
auto string1 = String::from_utf8_with_replacement_character("long string \xf4\x8f\xbf\xc0"sv); // U+110000
Array<u8, 24> string1_expected { 0x6c, 0x6f, 0x6e, 0x67, 0x20, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x20, 0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd };
EXPECT_EQ(string1.bytes(), string1_expected);
auto string3 = String::from_utf8_with_replacement_character("A valid string!"sv);
EXPECT_EQ(string3, "A valid string!"sv);
auto string4 = String::from_utf8_with_replacement_character(""sv);
EXPECT_EQ(string4, ""sv);
}
TEST_CASE(from_code_points)
{
for (u32 code_point = 0; code_point < 0x80; ++code_point) {