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LibJS+Everywhere: Make PrimitiveString and Utf16String fallible

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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.
This commit is contained in:
Timothy Flynn 2023-01-07 12:24:05 -05:00 • committed by Linus Groh
parent d793262beb
commit 115baa7e32
57 changed files with 306 additions and 295 deletions
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45
Userland/Libraries/LibJS/Runtime/Utf16String.cpp
View file

@ -11,9 +11,9 @@
namespace JS {
namespace Detail {
static NonnullRefPtr<Utf16StringImpl> the_empty_utf16_string()
static ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> the_empty_utf16_string(VM& vm)
{
static NonnullRefPtr<Utf16StringImpl> empty_string = Utf16StringImpl::create();
static NonnullRefPtr<Utf16StringImpl> empty_string = TRY(Utf16StringImpl::create(vm));
return empty_string;
}
@ -22,27 +22,27 @@ Utf16StringImpl::Utf16StringImpl(Utf16Data string)
{
}
NonnullRefPtr<Utf16StringImpl> Utf16StringImpl::create()
ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm)
{
return adopt_ref(*new Utf16StringImpl());
return TRY_OR_THROW_OOM(vm, adopt_nonnull_ref_or_enomem(new (nothrow) Utf16StringImpl()));
}
NonnullRefPtr<Utf16StringImpl> Utf16StringImpl::create(Utf16Data string)
ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, Utf16Data string)
{
return adopt_ref(*new Utf16StringImpl(move(string)));
return TRY_OR_THROW_OOM(vm, adopt_nonnull_ref_or_enomem(new (nothrow) Utf16StringImpl(move(string))));
}
NonnullRefPtr<Utf16StringImpl> Utf16StringImpl::create(StringView string)
ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, StringView string)
{
return create(AK::utf8_to_utf16(string).release_value_but_fixme_should_propagate_errors());
return create(vm, TRY_OR_THROW_OOM(vm, utf8_to_utf16(string)));
}
NonnullRefPtr<Utf16StringImpl> Utf16StringImpl::create(Utf16View const& view)
ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, Utf16View const& view)
{
Utf16Data string;
string.ensure_capacity(view.length_in_code_units());
string.append(view.data(), view.length_in_code_units());
return create(move(string));
TRY_OR_THROW_OOM(vm, string.try_ensure_capacity(view.length_in_code_units()));
string.unchecked_append(view.data(), view.length_in_code_units());
return create(vm, move(string));
}
Utf16Data const& Utf16StringImpl::string() const
@ -57,23 +57,28 @@ Utf16View Utf16StringImpl::view() const
}
Utf16String::Utf16String()
: m_string(Detail::the_empty_utf16_string())
ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm)
{
return Utf16String { TRY(Detail::the_empty_utf16_string(vm)) };
}
Utf16String::Utf16String(Utf16Data string)
: m_string(Detail::Utf16StringImpl::create(move(string)))
ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, Utf16Data string)
{
return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, move(string))) };
}
Utf16String::Utf16String(StringView string)
: m_string(Detail::Utf16StringImpl::create(move(string)))
ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, StringView string)
{
return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, string)) };
}
Utf16String::Utf16String(Utf16View const& string)
: m_string(Detail::Utf16StringImpl::create(move(string)))
ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, Utf16View const& string)
{
return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, string)) };
}
Utf16String::Utf16String(NonnullRefPtr<Detail::Utf16StringImpl> string)
: m_string(move(string))
{
}