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Reorganizing source code. Created util dir

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
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Leonardo de Moura 2012-10-20 10:19:38 -07:00
parent 630ba0c675
commit 2c464d413d
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61
lib/approx_nat.cpp
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@ -1,61 +0,0 @@
/*++
Copyright (c) 2007 Microsoft Corporation
Module Name:
approx_nat.cpp
Abstract:
Approximated natural numbers. It performs operations on the set [0, ..., 2^{n-2}, huge].
Where huge represents all numbers greater than 2^{n-2}.
Author:
Leonardo (leonardo) 2008-01-11
Notes:
--*/
#include"approx_nat.h"
approx_nat::approx_nat(unsigned val) {
m_value = val > m_limit ? UINT_MAX : val;
}
approx_nat & approx_nat::operator=(unsigned val) {
m_value = val > m_limit ? UINT_MAX : val;
return *this;
}
approx_nat & approx_nat::operator+=(unsigned w) {
if (is_huge())
return *this;
if (w > m_limit) {
m_value = UINT_MAX;
return *this;
}
m_value += w;
if (m_value > m_limit)
m_value = UINT_MAX;
return *this;
}
approx_nat & approx_nat::operator*=(unsigned w) {
if (is_huge())
return *this;
unsigned long long r = static_cast<unsigned long long>(m_value) * static_cast<unsigned long long>(w);
if (r > m_limit)
m_value = UINT_MAX;
else
m_value = static_cast<unsigned>(r);
return *this;
}
std::ostream & operator<<(std::ostream & target, approx_nat const & w) {
if (w.is_huge())
target << "[huge]";
else
target << w.get_value();
return target;
}