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

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This commit is contained in:
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 
Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/13ed6aba712
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5633
Reviewed-by: https://github.com/gmta
10 changed files with 183 additions and 11 deletions
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26
AK/Utf16StringData.cpp
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@@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Stream.h>
#include <AK/TypedTransfer.h>
#include <AK/Utf16StringData.h>
#include <AK/Utf32View.h>
@@ -158,6 +159,31 @@ NonnullRefPtr<Utf16StringData> Utf16StringData::from_string_builder(StringBuilde
return adopt_ref(*new (buffer->buffer.data()) Utf16StringData { storage_type, code_unit_length });
}
ErrorOr<NonnullRefPtr<Utf16StringData>> Utf16StringData::from_ipc_stream(Stream& stream, size_t length_in_code_units, bool is_ascii)
{
RefPtr<Utf16StringData> string;
if (is_ascii) {
string = create_uninitialized(StorageType::ASCII, length_in_code_units);
Bytes bytes { string->m_ascii_data, length_in_code_units };
TRY(stream.read_until_filled(bytes));
if (!string->ascii_view().is_ascii())
return Error::from_string_literal("Stream contains invalid ASCII data");
} else {
string = create_uninitialized(StorageType::UTF16, length_in_code_units);
Bytes bytes { reinterpret_cast<u8*>(string->m_utf16_data), length_in_code_units * sizeof(char16_t) };
TRY(stream.read_until_filled(bytes));
if (!string->utf16_view().validate())
return Error::from_string_literal("Stream contains invalid UTF-16 data");
}
return string.release_nonnull();
}
NonnullRefPtr<Utf16StringData> Utf16StringData::to_well_formed(Utf16View const& utf16_string)
{
VERIFY(!utf16_string.has_ascii_storage());