support-values.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2008
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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namespace Gecode { namespace Int {
template<class View, class A>
forceinline void
SupportValues<View,A>::reset(void) {
rp = rp_fst; v = rp->min;
max = rp->min + static_cast<int>((rp+1)->pos - rp->pos) - 1;
}
template<class View, class A>
inline
SupportValues<View,A>::SupportValues(A& a0, View x0)
: a(a0), x(x0), bs(a,x.size(),true) {
unsigned int n = 0;
for (ViewRanges<View> r(x); r(); ++r)
n++;
rp_fst = a.template alloc<RangePos>(n+1);
rp_lst = rp_fst + n;
unsigned int p = 0;
int i = 0;
for (ViewRanges<View> r(x); r(); ++r) {
rp_fst[i].min = r.min();
rp_fst[i].pos = p;
p += r.width(); i++;
}
rp_fst[i].pos=p;
reset();
}
template<class View, class A>
forceinline
SupportValues<View,A>::~SupportValues(void) {
bs.dispose(a);
a.free(rp_fst,static_cast<unsigned long int>(rp_lst-rp_fst+1));
}
template<class View, class A>
forceinline void
SupportValues<View,A>::operator ++(void) {
if (++v > max)
if (++rp < rp_lst) {
v = rp->min;
max = rp->min + static_cast<int>((rp+1)->pos - rp->pos) - 1;
}
}
template<class View, class A>
forceinline bool
SupportValues<View,A>::operator ()(void) const {
return rp < rp_lst;
}
template<class View, class A>
forceinline int
SupportValues<View,A>::val(void) const {
return v;
}
template<class View, class A>
forceinline void
SupportValues<View,A>::support(void) {
bs.clear(rp->pos + static_cast<unsigned int>(v-rp->min));
}
template<class View, class A>
forceinline bool
SupportValues<View,A>::_support(int n) {
RangePos* l = rp_fst;
RangePos* r = rp_lst-1;
while (true) {
if (l > r) return false;
RangePos* m = l + (r-l)/2;
int max = m->min + static_cast<int>((m+1)->pos - m->pos) - 1;
if ((n >= m->min) && (n <= max)) {
bs.clear(m->pos + static_cast<unsigned int>(n-m->min));
return true;
}
if (l == r) return false;
if (n < m->min)
r=m-1;
else
l=m+1;
}
GECODE_NEVER;
return false;
}
template<class View, class A>
forceinline bool
SupportValues<View,A>::support(int n) {
if ((n < x.min()) || (n > x.max()))
return false;
return _support(n);
}
template<class View, class A>
forceinline bool
SupportValues<View,A>::support(long long int n) {
if ((n < x.min()) || (n > x.max()))
return false;
return _support(static_cast<int>(n));
}
template<class View, class A>
forceinline void
SupportValues<View,A>::Unsupported::find(void) {
// Skip all supported positions
while ((p < sv.x.size()) && !sv.bs.get(p))
p = sv.bs.next(p);
// Move to matching range
while ((rp < sv.rp_lst) && (p >= (rp+1)->pos))
rp++;
}
template<class View, class A>
forceinline
SupportValues<View,A>::Unsupported::Unsupported(SupportValues& sv0)
: rp(sv0.rp_fst), p(0), sv(sv0) {
find();
}
template<class View, class A>
forceinline void
SupportValues<View,A>::Unsupported::operator ++(void) {
p++; find();
}
template<class View, class A>
forceinline bool
SupportValues<View,A>::Unsupported::operator ()(void) const {
return rp < sv.rp_lst;
}
template<class View, class A>
forceinline int
SupportValues<View,A>::Unsupported::val(void) const {
return static_cast<int>(rp->min+(p-rp->pos));
}
template<class View, class A>
inline ModEvent
SupportValues<View,A>::tell(Space& home) {
Unsupported u(*this);
return x.minus_v(home,u,false);
}
}}
// STATISTICS: int-prop
Gecode::Int::SupportValues
Support value iterator and recorder
Definition support-values.hh:48
Gecode::Int::SupportValues::val
int val(void) const
Return current value.
Definition support-values.hpp:88
Gecode::Int::SupportValues::support
void support(void)
Mark current (iterator) value as supported.
Definition support-values.hpp:94
Gecode::Int::SupportValues::~SupportValues
~SupportValues(void)
Destructor.
Definition support-values.hpp:65
Gecode::Int::SupportValues::SupportValues
SupportValues(A &a, View x)
Initialize for view x.
Definition support-values.hpp:45
Gecode::Int::SupportValues::tell
ModEvent tell(Space &home)
Remove all unsupported values.
Definition support-values.hpp:175
Gecode::Int::SupportValues::operator++
void operator++(void)
Move iterator to next value (if possible).
Definition support-values.hpp:72
Gecode::Int::SupportValues::reset
void reset(void)
Reset iterator.
Definition support-values.hpp:38
Gecode::Int::SupportValues::operator()
bool operator()(void) const
Test whether iterator is still at a value or done.
Definition support-values.hpp:82
Gecode::Int::ViewRanges
Range iterator for integer views.
Definition view.hpp:54
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::Support::BitSetBase::get
bool get(unsigned int i) const
Access value at bit i.
Definition bitset-base.hpp:590
Gecode::Support::BitSetBase::next
unsigned int next(unsigned int i) const
Return position greater or equal i of next set bit (i is allowed to be equal to size).
Definition bitset-base.hpp:606
Gecode::View
Gecode::Int
Finite domain integers.
Gecode
Gecode toplevel namespace
Gecode::min
void min(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition arithmetic.cpp:67
Gecode::max
void max(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition arithmetic.cpp:49
Gecode::ModEvent
int ModEvent
Type for modification events.
Definition core.hpp:62
forceinline
#define forceinline
Definition config.hpp:187
GECODE_NEVER
#define GECODE_NEVER
Assert that this command is never executed.
Definition macros.hpp:56