ARCHIVE/xahaud
3
0
Fork 0
mirror of https://github.com/Xahau/xahaud.git synced 2025-12-06 17:27:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

Optimize / operation.

Browse Source
This commit is contained in:
JoelKatz
2012-04-11 14:24:22 -07:00
parent efd363538c
commit ded4d19a65
1 changed files with 11 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
src/Amount.cpp
View File

@@ -219,24 +219,23 @@ STAmount operator-(STAmount v1, STAmount v2)
STAmount operator/(const STAmount& num, const STAmount& den)
{
CBigNum numerator, denominator, quotient;
CBigNum v;
if (den.value == 0) throw std::runtime_error("illegal offer");
if (num.value == 0) return STAmount();
// Compute (numerator * 10^16) / denominator
if ((BN_add_word(&numerator, num.value) != 1) ||
(BN_add_word(&denominator, den.value) != 1) ||
(BN_mul_word(&numerator, 10000000000000000ull) != 1) ||
(BN_div(&quotient, NULL, &numerator, &denominator, CAutoBN_CTX()) != 1))
if ((BN_add_word(&v, num.value) != 1) ||
(BN_mul_word(&v, 10000000000000000ull) != 1) ||
(BN_div_word(&v, den.value) == ((BN_ULONG)-1)))
{
throw std::runtime_error("internal bn error");
}
// 10^15 <= quotient <= 10^17
assert(BN_num_bytes(&quotient) <= 60);
assert(BN_num_bytes(&v) <= 60);
return STAmount(quotient.getulong(), num.offset - den.offset - 16);
return STAmount(v.getulong(), num.offset - den.offset - 16);
}
STAmount operator*(const STAmount &v1, const STAmount &v2)