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feat(big): add SBigBitLen

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fallenoak 2023-02-01 22:54:33 -06:00
parent 5edf49dae7
commit 24c6a5134c
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3 changed files with 87 additions and 0 deletions
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17
storm/Big.cpp
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@ -7,6 +7,23 @@ void SBigAdd(BigData* a, BigData* b, BigData* c) {
Add(a->Primary(), b->Primary(), c->Primary());
}
void SBigBitLen(BigData* num, uint32_t* len) {
auto& buffer = num->Primary();
buffer.Trim();
auto index = buffer.Count() - 1;
auto high = buffer[index];
uint32_t bitIndex;
for (bitIndex = 31; bitIndex > 0; bitIndex--) {
if (((1 << bitIndex) & high)) {
break;
}
}
*len = (index * 32) + bitIndex + 1;
}
int32_t SBigCompare(BigData* a, BigData* b) {
return Compare(a->Primary(), b->Primary());
}

2
storm/Big.hpp
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@ -6,6 +6,8 @@
void SBigAdd(BigData* a, BigData* b, BigData* c);
void SBigBitLen(BigData* num, uint32_t* len);
int32_t SBigCompare(BigData* a, BigData* b);
void SBigDel(BigData* num);