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LibJS: Add all of the DataView.prototype.set* methods

This commit is contained in:
Idan Horowitz 2021-06-14 02:02:53 +03:00 committed by Linus Groh
parent c54b9a6920
commit d7a70eb77c
8 changed files with 203 additions and 0 deletions

View file

@ -55,6 +55,14 @@ String SignedBigInteger::to_base10() const
return builder.to_string();
}
u64 SignedBigInteger::to_u64() const
{
u64 unsigned_value = m_unsigned_data.to_u64();
if (!m_sign)
return unsigned_value;
return ~(unsigned_value - 1); // equivalent to `-unsigned_value`, but doesnt trigger UBSAN
}
FLATTEN SignedBigInteger SignedBigInteger::plus(const SignedBigInteger& other) const
{
// If both are of the same sign, just add the unsigned data and return.

View file

@ -65,6 +65,8 @@ public:
static SignedBigInteger from_base10(StringView str);
String to_base10() const;
u64 to_u64() const;
const UnsignedBigInteger& unsigned_value() const { return m_unsigned_data; }
const Vector<u32, STARTING_WORD_SIZE> words() const { return m_unsigned_data.words(); }
bool is_negative() const { return m_sign; }

View file

@ -102,6 +102,17 @@ String UnsignedBigInteger::to_base10() const
return builder.to_string();
}
u64 UnsignedBigInteger::to_u64() const
{
VERIFY(sizeof(Word) == 4);
if (!length())
return 0;
u64 value = m_words[0];
if (length() > 1)
value |= static_cast<u64>(m_words[1]) << 32;
return value;
}
void UnsignedBigInteger::set_to_0()
{
m_words.clear_with_capacity();

View file

@ -56,6 +56,8 @@ public:
static UnsignedBigInteger from_base10(const String& str);
String to_base10() const;
u64 to_u64() const;
const Vector<Word, STARTING_WORD_SIZE>& words() const { return m_words; }
void set_to_0();