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Add Gmpq::is_zero()

This commit is contained in:
Andreas Fabri 2021-04-04 21:39:00 +01:00
parent 102eb0140a
commit 93fc1aee41
1 changed files with 6 additions and 0 deletions
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6
Number_types/include/CGAL/GMP/Gmpq_type.h
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@ -228,6 +228,12 @@ public:
double to_double() const noexcept;
Sign sign() const noexcept;
bool is_zero() const
{
const __mpz_struct* zn = mpq_numref(mpq());
return mpn_zero_p(zn->_mp_d, zn->_mp_size);
}
const mpq_t & mpq() const noexcept { return Ptr()->mpQ; }
mpq_t & mpq() noexcept { return ptr()->mpQ; }