115baa7e32
This makes construction of Utf16String fallible in OOM conditions. The immediate impact is that PrimitiveString must then be fallible as well, as it may either transcode UTF-8 to UTF-16, or create a UTF-16 string from ropes. There are a couple of places where it is very non-trivial to propagate the error further. A FIXME has been added to those locations.
125 lines
3.1 KiB
C++
125 lines
3.1 KiB
C++
/*
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* Copyright (c) 2021-2023, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/StringView.h>
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#include <LibJS/Runtime/Utf16String.h>
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#include <LibJS/Runtime/VM.h>
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namespace JS {
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namespace Detail {
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static ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> the_empty_utf16_string(VM& vm)
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{
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static NonnullRefPtr<Utf16StringImpl> empty_string = TRY(Utf16StringImpl::create(vm));
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return empty_string;
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}
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Utf16StringImpl::Utf16StringImpl(Utf16Data string)
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: m_string(move(string))
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{
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}
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ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm)
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{
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return TRY_OR_THROW_OOM(vm, adopt_nonnull_ref_or_enomem(new (nothrow) Utf16StringImpl()));
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}
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ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, Utf16Data string)
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{
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return TRY_OR_THROW_OOM(vm, adopt_nonnull_ref_or_enomem(new (nothrow) Utf16StringImpl(move(string))));
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}
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ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, StringView string)
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{
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return create(vm, TRY_OR_THROW_OOM(vm, utf8_to_utf16(string)));
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}
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ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, Utf16View const& view)
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{
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Utf16Data string;
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TRY_OR_THROW_OOM(vm, string.try_ensure_capacity(view.length_in_code_units()));
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string.unchecked_append(view.data(), view.length_in_code_units());
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return create(vm, move(string));
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}
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Utf16Data const& Utf16StringImpl::string() const
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{
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return m_string;
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}
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Utf16View Utf16StringImpl::view() const
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{
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return Utf16View { m_string };
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}
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}
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ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm)
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{
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return Utf16String { TRY(Detail::the_empty_utf16_string(vm)) };
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}
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ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, Utf16Data string)
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{
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return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, move(string))) };
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}
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ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, StringView string)
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{
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return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, string)) };
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}
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ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, Utf16View const& string)
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{
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return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, string)) };
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}
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Utf16String::Utf16String(NonnullRefPtr<Detail::Utf16StringImpl> string)
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: m_string(move(string))
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{
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}
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Utf16Data const& Utf16String::string() const
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{
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return m_string->string();
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}
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Utf16View Utf16String::view() const
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{
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return m_string->view();
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}
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Utf16View Utf16String::substring_view(size_t code_unit_offset, size_t code_unit_length) const
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{
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return view().substring_view(code_unit_offset, code_unit_length);
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}
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Utf16View Utf16String::substring_view(size_t code_unit_offset) const
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{
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return view().substring_view(code_unit_offset);
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}
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ThrowCompletionOr<DeprecatedString> Utf16String::to_utf8(VM& vm) const
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{
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return TRY_OR_THROW_OOM(vm, view().to_utf8(Utf16View::AllowInvalidCodeUnits::Yes));
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}
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u16 Utf16String::code_unit_at(size_t index) const
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{
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return view().code_unit_at(index);
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}
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size_t Utf16String::length_in_code_units() const
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{
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return view().length_in_code_units();
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}
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bool Utf16String::is_empty() const
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{
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return view().is_empty();
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}
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}
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