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bit_vector: fix operator==() for the case that num_bits is a multiple of 32

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Signed-off-by: Nuno Lopes <t-nclaud@microsoft.com>
This commit is contained in:
Nuno Lopes 2013-03-22 11:50:41 -07:00
parent 39d7246251
commit c824178e7e
2 changed files with 4 additions and 3 deletions
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3
src/util/bit_vector.cpp
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@ -116,7 +116,7 @@ void bit_vector::shift_right(unsigned k) {
}
}
bool bit_vector::operator==(bit_vector const & source) {
bool bit_vector::operator==(bit_vector const & source) const {
if (m_num_bits != source.m_num_bits)
return false;
unsigned n = num_words();
@ -129,6 +129,7 @@ bool bit_vector::operator==(bit_vector const & source) {
}
unsigned bit_rest = source.m_num_bits % 32;
unsigned mask = (1 << bit_rest) - 1;
if (mask == 0) mask = UINT_MAX;
return (m_data[i] & mask) == (source.m_data[i] & mask);
}