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deal with unsigned / bignum #4361

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-05-18 14:42:06 -07:00
parent 78a4717c06
commit 1072bf1536
2 changed files with 30 additions and 13 deletions
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21
src/util/rational.h
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@ -417,18 +417,25 @@ public:
static bool is_rational() { return true; }
unsigned get_num_bits() const {
rational two(2);
unsigned get_num_digits(rational const& base) const {
SASSERT(is_int());
SASSERT(!is_neg());
rational n(*this);
unsigned num_bits = 1;
n = div(n, two);
unsigned num_digits = 1;
n = div(n, base);
while (n.is_pos()) {
++num_bits;
n = div(n, two);
++num_digits;
n = div(n, base);
}
return num_bits;
return num_digits;
}
unsigned get_num_bits() const {
return get_num_digits(rational(2));
}
unsigned get_num_decimal() const {
return get_num_digits(rational(10));
}
static bool limit_denominator(rational &num, rational const& limit);