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Division operator for GTElement (e1/e2) #438

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Division operator for GTElement (e1/e2) #438

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d72fa47
Added division operator for GTElement
kofi-dalvik Oct 21, 2023
ee44e35
Added test for GT division operator
kofi-dalvik Oct 25, 2023
28ec4cf
Added test for GT division operator
kofi-dalvik Oct 25, 2023
b0dd82c
Merge remote-tracking branch 'origin/main'
kofi-dalvik Nov 10, 2023
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10 changes: 10 additions & 0 deletions src/elements.cpp
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Expand Up @@ -474,6 +474,16 @@ GTElement operator*(GTElement& a, GTElement& b)
return ans;
}

GTElement operator/(GTElement& a, GTElement& b)
{
GTElement ans;
GTElement b_inv;
blst_fp12_inverse(&(b_inv.r), &(b.r));
blst_fp12_mul(&(ans.r), &(a.r), &(b_inv.r));

return ans;
}

void GTElement::Serialize(uint8_t* buffer) const
{
memcpy(buffer, &r, GTElement::SIZE);
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1 change: 1 addition & 0 deletions src/elements.hpp
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Expand Up @@ -130,6 +130,7 @@ class GTElement {
friend bool operator!=(GTElement const &a, GTElement const &b);
friend std::ostream &operator<<(std::ostream &os, const GTElement &s);
friend GTElement operator*(GTElement &a, GTElement &b);
friend GTElement operator/(GTElement &a, GTElement &b);

private:
blst_fp12 r;
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5 changes: 5 additions & 0 deletions src/test.cpp
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Expand Up @@ -1525,6 +1525,11 @@ TEST_CASE("GTElement")
auto agg_sig_pair = G1Element::Generator().Pair(aggsig);

REQUIRE(pair == agg_sig_pair);

// test division operator
GTElement gt1 = G1Element::Generator().Pair(G2Element::Generator());
GTElement gt2 = G1Element::Generator().Pair(G2Element::Generator());
REQUIRE(gt1 / gt2 == gt2 / gt1 );
}
}

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