songsenand
/
cgal
mirror of https://github.com/CGAL/cgal
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Number_types/include/CGAL/GMP/Gmpq_type.h
View File

@ -228,6 +228,12 @@ public:
double to_double() const noexcept; double to_double() const noexcept;
Sign sign() 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; } const mpq_t & mpq() const noexcept { return Ptr()->mpQ; }
mpq_t & mpq() noexcept { return ptr()->mpQ; } mpq_t & mpq() noexcept { return ptr()->mpQ; }