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more scaffolding

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This commit is contained in:
Nikolaj Bjorner 2021-03-21 11:31:14 -07:00
parent a1f484fa35
commit 2fef6dc502
16 changed files with 476 additions and 152 deletions
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18
src/util/rational.h
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@ -308,6 +308,10 @@ public:
bool is_even() const {
return m().is_even(m_val);
}
bool is_odd() const {
return !is_even();
}
friend inline rational floor(rational const & r) {
rational f;
@ -333,6 +337,8 @@ public:
return m().is_power_of_two(m_val, shift);
}
bool mult_inverse(unsigned num_bits, rational & result);
static rational const & zero() {
return m_zero;
}
@ -459,6 +465,18 @@ public:
return get_num_digits(rational(10));
}
bool get_bit(unsigned index) const {
return m().get_bit(m_val, index);
}
unsigned trailing_zeros() const {
if (is_zero())
return 0;
unsigned k = 0;
for (; !get_bit(k); ++k);
return k;
}
static bool limit_denominator(rational &num, rational const& limit);
};