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AK+LibIPC: Implement an encoder/decoder for UTF-16 strings

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Timothy Flynn 2025-07-28 16:11:50 -04:00 • committed by Tim Flynn
parent e36df5ea0a
commit 13ed6aba71
Notes: github-actions[bot] 2025-08-02 17:11:30 +00:00
10 changed files with 183 additions and 11 deletions
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74
Tests/AK/TestUtf16String.cpp
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@ -9,6 +9,7 @@
#include <AK/Array.h>
#include <AK/CharacterTypes.h>
#include <AK/Enumerate.h>
#include <AK/MemoryStream.h>
#include <AK/StringBuilder.h>
#include <AK/Utf16String.h>
#include <AK/Utf32View.h>
@ -411,6 +412,79 @@ TEST_CASE(repeated)
EXPECT_DEATH("Creating a string from an invalid code point", (void)Utf16String::repeated(0xffffffff, 1));
}
TEST_CASE(from_ipc_stream)
{
{
auto data = "abc"sv;
FixedMemoryStream stream { data.bytes() };
auto string = TRY_OR_FAIL(Utf16String::from_ipc_stream(stream, data.length(), true));
EXPECT(string.is_ascii());
EXPECT(!string.has_long_ascii_storage());
EXPECT(string.has_short_ascii_storage());
EXPECT_EQ(string.length_in_code_units(), 3uz);
EXPECT_EQ(string, data);
}
{
auto data = "abcdefghijklmnopqrstuvwxyz"sv;
FixedMemoryStream stream { data.bytes() };
auto string = TRY_OR_FAIL(Utf16String::from_ipc_stream(stream, data.length(), true));
EXPECT(string.is_ascii());
EXPECT(string.has_long_ascii_storage());
EXPECT(!string.has_short_ascii_storage());
EXPECT_EQ(string.length_in_code_units(), 26uz);
EXPECT_EQ(string, data);
}
{
auto data = u"hello 😀 there!"sv;
StringBuilder builder(StringBuilder::Mode::UTF16);
builder.append(data);
auto buffer = MUST(builder.to_byte_buffer());
FixedMemoryStream stream { buffer.bytes() };
auto string = TRY_OR_FAIL(Utf16String::from_ipc_stream(stream, data.length_in_code_units(), false));
EXPECT(!string.is_ascii());
EXPECT(!string.has_long_ascii_storage());
EXPECT(!string.has_short_ascii_storage());
EXPECT_EQ(string.length_in_code_units(), 15uz);
EXPECT_EQ(string, data);
}
{
auto data = "abc"sv;
FixedMemoryStream stream { data.bytes() };
auto result = Utf16String::from_ipc_stream(stream, data.length() + 1, true);
EXPECT(result.is_error());
}
{
auto data = u"😀"sv;
StringBuilder builder(StringBuilder::Mode::UTF16);
builder.append(data);
auto buffer = MUST(builder.to_byte_buffer());
FixedMemoryStream stream { buffer.bytes() };
auto result = Utf16String::from_ipc_stream(stream, data.length_in_code_units(), true);
EXPECT(result.is_error());
}
{
auto data = u"hello 😀 there!"sv;
StringBuilder builder(StringBuilder::Mode::UTF16);
builder.append(data);
auto buffer = MUST(builder.to_byte_buffer());
FixedMemoryStream stream { buffer.bytes() };
auto result = Utf16String::from_ipc_stream(stream, data.length_in_code_units(), true);
EXPECT(result.is_error());
}
}
TEST_CASE(to_lowercase_unconditional_special_casing)
{
// LATIN SMALL LETTER SHARP S