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LibCrypto: Add SignedBigInteger::negated_value()

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Return the negated value of the current number.
This commit is contained in:
Lucas CHOLLET 2022-01-04 16:33:33 +01:00 • committed by Sam Atkins
commit d589898f5b
Notes: sideshowbarker 2024-07-17 07:09:23 +09:00
2 changed files with 9 additions and 0 deletions
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7
Userland/Libraries/LibCrypto/BigInt/SignedBigInteger.cpp
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@ -292,6 +292,13 @@ FLATTEN SignedDivisionResult SignedBigInteger::divided_by(SignedBigInteger const
}; };
} }
FLATTEN SignedBigInteger SignedBigInteger::negated_value() const
{
auto result { *this };
result.negate();
return result;
}
u32 SignedBigInteger::hash() const u32 SignedBigInteger::hash() const
{ {
return m_unsigned_data.hash() * (1 - (2 * m_sign)); return m_unsigned_data.hash() * (1 - (2 * m_sign));

2
Userland/Libraries/LibCrypto/BigInt/SignedBigInteger.h
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@ -121,6 +121,8 @@ public:
[[nodiscard]] SignedBigInteger multiplied_by(UnsignedBigInteger const& other) const; [[nodiscard]] SignedBigInteger multiplied_by(UnsignedBigInteger const& other) const;
[[nodiscard]] SignedDivisionResult divided_by(UnsignedBigInteger const& divisor) const; [[nodiscard]] SignedDivisionResult divided_by(UnsignedBigInteger const& divisor) const;
[[nodiscard]] SignedBigInteger negated_value() const;
[[nodiscard]] u32 hash() const; [[nodiscard]] u32 hash() const;
void set_bit_inplace(size_t bit_index); void set_bit_inplace(size_t bit_index);