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fix bugs reported by Nuno Lopes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-06-04 12:55:35 -07:00
parent aa0d921240
commit b6d9d8a601
3 changed files with 11 additions and 4 deletions
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10
src/util/bit_vector.cpp
View file

@ -22,6 +22,8 @@ Revision History:
#define DEFAULT_CAPACITY 2
#define MK_MASK(_num_bits_) ((1U << _num_bits_) - 1)
void bit_vector::expand_to(unsigned new_capacity) {
unsigned * new_data = alloc_svect(unsigned, new_capacity);
memset(new_data, 0, new_capacity * sizeof(unsigned));
@ -51,7 +53,7 @@ void bit_vector::resize(unsigned new_size, bool val) {
unsigned ewidx = num_words(new_size);
unsigned * begin = m_data + bwidx;
unsigned pos = m_num_bits % 32;
unsigned mask = (1 << pos) - 1;
unsigned mask = MK_MASK(pos);
int cval;
if (val) {
@ -128,7 +130,7 @@ bool bit_vector::operator==(bit_vector const & source) const {
return false;
}
unsigned bit_rest = source.m_num_bits % 32;
unsigned mask = (1 << bit_rest) - 1;
unsigned mask = MK_MASK(bit_rest);
if (mask == 0) mask = UINT_MAX;
return (m_data[i] & mask) == (source.m_data[i] & mask);
}
@ -149,7 +151,7 @@ bit_vector & bit_vector::operator|=(bit_vector const & source) {
unsigned i = 0;
for (i = 0; i < n2 - 1; i++)
m_data[i] |= source.m_data[i];
unsigned mask = (1 << bit_rest) - 1;
unsigned mask = MK_MASK(bit_rest);
m_data[i] |= source.m_data[i] & mask;
}
return *this;
@ -175,7 +177,7 @@ bit_vector & bit_vector::operator&=(bit_vector const & source) {
else {
for (i = 0; i < n2 - 1; i++)
m_data[i] &= source.m_data[i];
unsigned mask = (1 << bit_rest) - 1;
unsigned mask = MK_MASK(bit_rest);
m_data[i] &= (source.m_data[i] & mask);
}

1
src/util/bit_vector.h
View file

@ -69,6 +69,7 @@ public:
m_num_bits(0),
m_capacity(num_words(reserve_num_bits)),
m_data(alloc_svect(unsigned, m_capacity)) {
memset(m_data, 0, m_capacity * sizeof(unsigned));
}
bit_vector(bit_vector const & source):