event.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, 2015
*
* 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 {
forceinline void
Event::init(Event::Type e0, int t0, int i0) {
ei=static_cast<unsigned int>(e0 | (i0 << 3)); t=t0;
}
forceinline Event::Type
Event::type(void) const {
return static_cast<Type>(ei & 7);
}
forceinline int
Event::time(void) const {
return t;
}
forceinline int
Event::idx(void) const {
return static_cast<int>(ei >> 3);;
}
forceinline bool
Event::operator <(const Event& e) const {
if (time() == e.time())
return type() < e.type();
return time() < e.time();
}
template<class Char, class Traits>
inline std::basic_ostream<Char,Traits>&
operator <<(std::basic_ostream<Char,Traits>& os, const Event& e) {
std::basic_ostringstream<Char,Traits> s;
s.copyfmt(os); s.width(0);
s << '[';
switch (e.type()) {
case Event::LRT: s << "LRT"; break;
case Event::LCT: s << "LCT"; break;
case Event::EST: s << "EST"; break;
case Event::ZRO: s << "ZRO"; break;
case Event::ERT: s << "ERT"; break;
default: GECODE_NEVER;
}
s << ',' << e.time() << ',' << e.idx() << ']';
return os << s.str();
}
template<class Task>
forceinline Event*
Event::events(Region& r, const TaskArray<Task>& t, bool& assigned) {
Event* e = r.alloc<Event>(4*t.size()+1);
// Initialize events
assigned=true;
bool required=false;
int n=0;
for (int i=0; i<t.size(); i++)
if (t[i].assigned()) {
// Only add required part
if (t[i].pmin() > 0) {
required = true;
e[n++].init(Event::ERT,t[i].lst(),i);
e[n++].init(Event::LRT,t[i].ect(),i);
} else if (t[i].pmax() == 0) {
required = true;
e[n++].init(Event::ZRO,t[i].lst(),i);
}
} else {
assigned = false;
e[n++].init(Event::EST,t[i].est(),i);
e[n++].init(Event::LCT,t[i].lct(),i);
// Check whether task has required part
if (t[i].lst() < t[i].ect()) {
required = true;
e[n++].init(Event::ERT,t[i].lst(),i);
e[n++].init(Event::LRT,t[i].ect(),i);
}
}
if (!required)
return NULL;
// Sort events
Support::quicksort(e, n);
// Write end marker
e[n++].init(Event::END,Limits::infinity,0);
return e;
}
template<class Task>
forceinline Event*
Event::events(Region& r, const TaskArray<Task>& t) {
Event* e = r.alloc<Event>(2*t.size()+1);
// Only add assigned and mandatory tasks
int n=0;
for (int i=0; i<t.size(); i++)
if (t[i].assigned() && t[i].mandatory()) {
if (t[i].pmin() > 0) {
e[n++].init(Event::ERT,t[i].lst(),i);
e[n++].init(Event::LRT,t[i].ect(),i);
} else if (t[i].pmax() == 0) {
e[n++].init(Event::ZRO,t[i].lst(),i);
}
} else {
assert(!t[i].excluded());
return NULL;
}
// Sort events
Support::quicksort(e, n);
// Write end marker
e[n++].init(Event::END,Limits::infinity,0);
return e;
}
}}
// STATISTICS: int-prop
Gecode::Int::Event
Time-tabling event for task.
Definition task.hh:490
Gecode::Int::Event::t
int t
Time of event.
Definition task.hh:505
Gecode::Int::Event::idx
int idx(void) const
Return event index.
Definition event.hpp:50
Gecode::Int::Event::events
static Event * events(Region &r, const TaskArray< Task > &t, bool &assigned)
Allocate from r and initialize event array with tasks t.
Definition event.hpp:83
Gecode::Int::Event::ei
unsigned int ei
Combines type and number of task.
Definition task.hh:503
Gecode::Int::Event::init
void init(Type e, int t, int i)
Initialize event.
Definition event.hpp:37
Gecode::Int::Event::Type
Type
Event type for task with order in which they are processed.
Definition task.hh:493
Gecode::Int::Event::ZRO
@ ZRO
Zero-length task start time.
Definition task.hh:497
Gecode::Int::Event::ERT
@ ERT
Earliest required time of task.
Definition task.hh:498
Gecode::Int::Event::LRT
@ LRT
Latest required time of task.
Definition task.hh:494
Gecode::Int::Event::EST
@ EST
Earliest start time of task.
Definition task.hh:496
Gecode::Int::Event::END
@ END
End marker.
Definition task.hh:499
Gecode::Int::Event::LCT
@ LCT
Latest completion time of task.
Definition task.hh:495
Gecode::Int::Event::time
int time(void) const
Return event time.
Definition event.hpp:46
Gecode::Int::Event::type
Type type(void) const
Return event type.
Definition event.hpp:42
Gecode::Int::Event::operator<
bool operator<(const Event &e) const
Order among events.
Definition event.hpp:55
Gecode::Int::TaskArray
Task array.
Definition task.hh:165
Gecode::Region
Handle to region.
Definition region.hpp:55
Gecode::Int::Limits::infinity
const int infinity
Infinity for integers.
Definition int.hh:120
Gecode::Int
Finite domain integers.
Gecode::Int::operator<<
std::basic_ostream< Char, Traits > & operator<<(std::basic_ostream< Char, Traits > &os, const IdxViewArray< View > &x)
Definition idx-view.hpp:167
Gecode::Support::quicksort
void quicksort(Type *l, Type *r, Less &less)
Standard quick sort.
Definition sort.hpp:130
Gecode
Gecode toplevel namespace
forceinline
#define forceinline
Definition config.hpp:187
GECODE_NEVER
#define GECODE_NEVER
Assert that this command is never executed.
Definition macros.hpp:56