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1.8.1.2
gecode
int
val-set.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2011
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*
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* Last modified:
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* $Date: 2011-08-23 05:43:31 +1000 (Tue, 23 Aug 2011) $ by $Author: schulte $
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* $Revision: 12335 $
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace
Gecode {
namespace
Int {
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/*
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* Value sets
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*
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*/
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forceinline
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ValSet::ValSet
(
void
)
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: fst(NULL), lst(NULL), n(0) {}
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forceinline
void
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ValSet::add
(
Space
& home,
int
v
) {
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RangeList
*
c
=
fst
;
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RangeList
** p = &
fst
;
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while
(c != NULL) {
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if
(v < c->
min
()) {
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if
(v+1 == c->
min
()) {
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c->
min
(v);
n
++;
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return
;
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}
else
{
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*p =
new
(home)
RangeList
(v,v,c);
n
++;
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return
;
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}
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}
else
if
(v <= c->
max
()) {
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// Value already included
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return
;
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}
else
if
(v == c->
max
()+1) {
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if
((c->
next
() != NULL) && (v+1 == c->
next
()->
min
())) {
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c->
next
()->
min
(c->
min
());
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*p = c->
next
();
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c->
dispose
(home,c);
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}
else
{
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c->
max
(v);
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}
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n
++;
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return
;
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}
else
{
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// FIXME: HOW TO CAST HERE?
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p =
reinterpret_cast<
RangeList
**
>
(c->
nextRef
());
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c = *p;
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}
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}
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*p =
new
(home)
RangeList
(v,v,NULL);
n
++;
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lst
= *p;
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}
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forceinline
int
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ValSet::size
(
void
)
const
{
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return
n
;
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}
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forceinline
bool
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ValSet::empty
(
void
)
const
{
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return
n
== 0;
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}
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forceinline
int
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ValSet::min
(
void
)
const
{
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return
fst
->
min
();
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}
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forceinline
int
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ValSet::max
(
void
)
const
{
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return
lst
->
max
();
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}
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forceinline
void
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ValSet::update
(
Space
& home,
bool
share,
ValSet
& vs) {
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(void) share;
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if
(vs.
n
> 0) {
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n
= vs.
n
;
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// Count number of ranges
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int
m
= 0;
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for
(
RangeList
*
c
= vs.
fst
;
c
!= NULL;
c
=
c
->next())
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m++;
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fst
= home.
alloc
<
RangeList
>(
m
);
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lst
=
fst
+ (m-1);
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int
i
=0;
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for
(
RangeList
*
c
= vs.
fst
;
c
!= NULL;
c
=
c
->next()) {
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fst
[
i
].
min
(
c
->
min
());
fst
[
i
].
max
(
c
->
max
());
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fst
[
i
].
next
(
fst
+i+1);
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i++;
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}
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lst->
next
(NULL);
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}
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}
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forceinline
void
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ValSet::flush
(
void
) {
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fst
=
lst
= NULL;
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}
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forceinline
void
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ValSet::dispose
(
Space
& home) {
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if
(
fst
!= NULL)
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fst
->
dispose
(home,
lst
);
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}
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forceinline
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ValSet::Ranges::Ranges
(
const
ValSet
& vs)
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:
c
(vs.fst) {}
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forceinline
bool
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ValSet::Ranges::operator ()
(
void
)
const
{
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return
c
!= NULL;
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}
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forceinline
void
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ValSet::Ranges::operator ++
(
void
) {
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c
=
c
->next();
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}
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forceinline
int
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ValSet::Ranges::min
(
void
)
const
{
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return
c
->
min
();
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}
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forceinline
int
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ValSet::Ranges::max
(
void
)
const
{
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return
c
->
max
();
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}
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forceinline
unsigned
int
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ValSet::Ranges::width
(
void
)
const
{
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return
c
->
width
();
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}
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template
<
class
View>
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forceinline
Iter::Ranges::CompareStatus
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ValSet::compare
(View x)
const
{
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if
(
empty
() || (x.max() <
min
()) || (x.min() >
max
()))
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return
Iter::Ranges::CS_DISJOINT
;
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ValSet::Ranges
vsr(*
this
);
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ViewRanges<View>
xr(x);
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return
Iter::Ranges::compare
(xr,vsr);
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}
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template
<
class
View>
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forceinline
bool
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ValSet::subset
(View x)
const
{
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if
(
empty
() || (x.min() <
min
()) || (x.max() >
max
()))
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return
false
;
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ValSet::Ranges
vsr(*
this
);
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ViewRanges<View>
xr(x);
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return
Iter::Ranges::subset
(xr,vsr);
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}
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}}
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// STATISTICS: int-other