5e1499d104
This commit un-deprecates DeprecatedString, and repurposes it as a byte
string.
As the null state has already been removed, there are no other
particularly hairy blockers in repurposing this type as a byte string
(what it _really_ is).
This commit is auto-generated:
$ xs=$(ack -l \bDeprecatedString\b\|deprecated_string AK Userland \
Meta Ports Ladybird Tests Kernel)
$ perl -pie 's/\bDeprecatedString\b/ByteString/g;
s/deprecated_string/byte_string/g' $xs
$ clang-format --style=file -i \
$(git diff --name-only | grep \.cpp\|\.h)
$ gn format $(git ls-files '*.gn' '*.gni')
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
/*
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* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2020-2022, Idan Horowitz <idan.horowitz@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibJS/Runtime/BigInt.h>
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#include <LibJS/Runtime/PrimitiveString.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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struct ValueTraits : public Traits<Value> {
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static unsigned hash(Value value)
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{
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VERIFY(!value.is_empty());
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if (value.is_string()) {
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// FIXME: Propagate this error.
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return value.as_string().byte_string().hash();
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}
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if (value.is_bigint())
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return value.as_bigint().big_integer().hash();
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if (value.is_negative_zero())
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value = Value(0);
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// In the IEEE 754 standard a NaN value is encoded as any value from 0x7ff0000000000001 to 0x7fffffffffffffff,
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// with the least significant bits (referred to as the 'payload') carrying some kind of diagnostic information
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// indicating the source of the NaN. Since ECMA262 does not differentiate between different kinds of NaN values,
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// Sets and Maps must not differentiate between them either.
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// This is achieved by replacing any NaN value by a canonical qNaN.
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else if (value.is_nan())
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value = js_nan();
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return u64_hash(value.encoded()); // FIXME: Is this the best way to hash pointers, doubles & ints?
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}
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static bool equals(const Value a, const Value b)
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{
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return same_value_zero(a, b);
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}
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};
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}
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