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feat(big): add SetZero

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fallenoak 2023-01-31 12:17:51 -06:00
parent f1cf4af382
commit 8413214ae0
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3 changed files with 22 additions and 0 deletions
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4
storm/big/Ops.cpp
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@ -82,6 +82,10 @@ void Mul(BigBuffer& a, const BigBuffer& b, const BigBuffer& c, BigStack& stack)
stack.UnmakeDistinct(a, aa); stack.UnmakeDistinct(a, aa);
} }
void SetZero(BigBuffer& buffer) {
buffer.Clear();
}
void ToBinaryAppend(TSGrowableArray<uint8_t>& output, const BigBuffer& buffer) { void ToBinaryAppend(TSGrowableArray<uint8_t>& output, const BigBuffer& buffer) {
for (uint32_t i = 0; i < buffer.Count() * 4; i++) { for (uint32_t i = 0; i < buffer.Count() * 4; i++) {
auto byte = buffer[i / 4] >> (8 * (i & 3)); auto byte = buffer[i / 4] >> (8 * (i & 3));

2
storm/big/Ops.hpp
View file

@ -21,6 +21,8 @@ void Mul(BigBuffer& a, const BigBuffer& b, uint64_t c);
void Mul(BigBuffer& a, const BigBuffer& b, const BigBuffer& c, BigStack& stack); void Mul(BigBuffer& a, const BigBuffer& b, const BigBuffer& c, BigStack& stack);
void SetZero(BigBuffer& buffer);
void ToBinary(TSGrowableArray<uint8_t>& output, const BigBuffer& buffer); void ToBinary(TSGrowableArray<uint8_t>& output, const BigBuffer& buffer);
#endif #endif

16
test/Big.cpp
View file

@ -420,3 +420,19 @@ TEST_CASE("SBigToBinaryBuffer", "[big]") {
SBigDel(num); SBigDel(num);
} }
} }
TEST_CASE("SetZero", "[big]") {
SECTION("sets buffer to zero") {
BigData* num;
SBigNew(&num);
SBigFromUnsigned(num, 0x12345678);
CHECK(num->Primary().Count() == 1);
SetZero(num->Primary());
CHECK(num->Primary().Count() == 0);
SBigDel(num);
}
}