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LibCrypto: Add naive implementation of {Un,}SignedBigInteger::to_double

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This commit is contained in:
Idan Horowitz
2021-09-06 21:20:20 +03:00
committed by Linus Groh
parent 62bc238ac3
commit bcdad57670
Notes: sideshowbarker 2024-07-18 04:34:19 +09:00 
Author: https://github.com/IdanHo
Commit: https://github.com/SerenityOS/serenity/commit/bcdad576700
Pull-request: https://github.com/SerenityOS/serenity/pull/9859
Reviewed-by: https://github.com/linusg ✅
4 changed files with 16 additions and 0 deletions
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8
Userland/Libraries/LibCrypto/BigInt/SignedBigInteger.cpp
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@@ -63,6 +63,14 @@ u64 SignedBigInteger::to_u64() const
return ~(unsigned_value - 1); // equivalent to `-unsigned_value`, but doesnt trigger UBSAN
}
double SignedBigInteger::to_double() const
{
double unsigned_value = m_unsigned_data.to_double();
if (!m_sign)
return unsigned_value;
return -unsigned_value;
}
FLATTEN SignedBigInteger SignedBigInteger::plus(const SignedBigInteger& other) const
{
// If both are of the same sign, just add the unsigned data and return.