summaryrefslogtreecommitdiffstats
path: root/kmines/solver/solver.cpp
blob: 656df8a2dfbbd4eb3b15ba2e193cabbfdca15c1e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
/*
 * Copyright (c) 2001 Mikhail Kourinny (mkourinny@yahoo.com)
 * Copyright (c) 2002 Nicolas HADACEK  (hadacek@kde.org)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include "solver.h"
#include "solver.moc"

#include <algorithm>
#include <assert.h>

#include <tqtimer.h>
#include <layout.h>
#include <tqlabel.h>
#include <kprogress.h>

#include <klocale.h>

#include "headerP.h"


//-----------------------------------------------------------------------------
class SolverPrivate
{
 public:
    SolverPrivate() : facts(0), rules(0) {}
    ~SolverPrivate() {
        delete facts;
        delete rules;
    }

    AdviseFast::FactSet *facts;
    AdviseFast::RuleSet *rules;
#ifdef DEBUG
    unsigned long t0, t;
#endif
};

Solver::Solver(TQObject *parent)
    : TQObject(parent)
{
    d = new SolverPrivate;

#ifdef DEBUG
#define PRINT_ELAPSED(purpose) \
    d->t = time(0); \
    cout << "Spent " << d->t - d->t0 << " seconds on " purpose << endl; \
    d->t0 = d->t;

#endif
}

Solver::~Solver()
{
    delete d;
}

Coord Solver::advise(BaseField &field, float &probability)
{
    Coord point;
    probability = 1;
    delete d->facts;
    d->facts = new AdviseFast::FactSet(&field);
    delete d->rules;
    d->rules = new AdviseFast::RuleSet(d->facts);

	if( AdviseFast::adviseFast(&point, d->facts, d->rules) ) return point;

	CoordSet surePoints;
	AdviseFull::ProbabilityMap probabilities;
	AdviseFull::adviseFull(d->facts, &surePoints, &probabilities);

    // return one of the sure point (random choice to limit the tropism) [NH]
	if( !surePoints.empty() ) {
        KRandomSequence r;
        uint k = r.getLong(surePoints.size());
        CoordSet::iterator it = surePoints.begin();
        for (uint i=0; i<k; i++) ++it;
        return *it;
    }

	// Just a minimum probability logic here
	if( !probabilities.empty() ){
		probability = probabilities.begin()->first;
		return probabilities.begin()->second;
	}

	// Otherwise the Field is already solved :)
	return Coord(-1,-1);
}

void Solver::solve(BaseField &field, bool noGuess)
{
    _field = &field;
    initSolve(false, noGuess);
}

bool Solver::initSolve(bool oneStep, bool noGuess)
{
    _inOneStep = oneStep;
    _noGuess = noGuess;
    delete d->facts;
    d->facts = new AdviseFast::FactSet(_field);
    delete d->rules;
    d->rules = new AdviseFast::RuleSet(d->facts);
#ifdef DEBUG
    d->t0 = time(0);
#endif
    return solveStep();
}

bool Solver::solveStep()
{
    if ( _field->isSolved() ) {
        emit solvingDone(true);
        return true;
    }

    d->rules->solve();

#ifdef DEBUG
	PRINT_ELAPSED("fast rules")
#endif

    if( _field->isSolved() ) {
        emit solvingDone(true);
        return true;
    }

    CoordSet surePoints;
	AdviseFull::ProbabilityMap probabilities;
	AdviseFull::adviseFull(d->facts, &surePoints, &probabilities);

#ifdef DEBUG
	PRINT_ELAPSED("full rules")
#endif

	if(!surePoints.empty()){
		CoordSet::iterator i;
		for(i=surePoints.begin(); i!=surePoints.end(); ++i) {
            bool b = d->rules->reveal(*i);
			assert(b);
        }
	} else if ( !_noGuess ) {
#ifdef DEBUG
	cout << "Applying heuristics!" << endl;
	cout << *_field << endl;
#endif
        // Minimum probability logic
        assert(!probabilities.empty());
#ifdef DEBUG
		AdviseFull::ProbabilityMap::iterator i=probabilities.begin();
		cout << "Probability is " << i->first << endl;
#endif
		bool success = d->rules->reveal(probabilities.begin()->second);
        if ( !success ) {
            emit solvingDone(false);
            return false;
        }
    }

    if (_inOneStep) return solveStep();
    else TQTimer::singleShot(0, this, TQT_SLOT(solveStep()));
    return false;
}

bool Solver::solveOneStep(BaseField &field)
{
    _field = &field;
    return initSolve(true, false);
}


//-----------------------------------------------------------------------------
SolvingRateDialog::SolvingRateDialog(const BaseField &field, TQWidget *parent)
    : KDialogBase(Plain, i18n("Compute Solving Rate"), Ok|Close,
                  Close, parent, "compute_solving_rate", true, true),
      _refField(field)
{
    connect(&_solver, TQT_SIGNAL(solvingDone(bool)), TQT_SLOT(solvingDone(bool)));

	KGuiItem item = KStdGuiItem::ok();
	item.setText(i18n("Start"));
	setButtonOK(item);
    
    TQVBoxLayout *top = new TQVBoxLayout(plainPage(), 0, spacingHint());
    TQLabel *label = new TQLabel(i18n("Width: %1").arg(field.width()),
                               plainPage());
    top->addWidget(label);
    label = new TQLabel(i18n("Height: %1").arg(field.height()), plainPage());
    top->addWidget(label);
    label = new TQLabel(i18n("Mines: %1 (%2%)").arg(field.nbMines())
          .arg( field.nbMines() * 100.0 / field.size()),
                       plainPage());
    top->addWidget(label);

    top->addSpacing(spacingHint());

    _progress = new KProgress(NB_STEPS, plainPage());
    _progress->setTextEnabled(true);
    _progress->setFormat("%v");
    top->addWidget(_progress);

    _label = new TQLabel(i18n("Success rate:"), plainPage());
    top->addWidget(_label);
}

void SolvingRateDialog::slotOk()
{
    enableButtonOK(false);
    _i = 0;
    _success = 0;
    _progress->setValue(0);
    TQTimer::singleShot(0, this, TQT_SLOT(step()));
}

void SolvingRateDialog::step()
{
    if ( _i==NB_STEPS ) {
        enableButtonOK(true);
        return;
    }
    _i++;
    _field.reset(_refField.width(), _refField.height(), _refField.nbMines());
    _solver.solve(_field, false);
}

void SolvingRateDialog::solvingDone(bool success)
{
    if (success) _success++;
    _label->setText(i18n("Success rate: %1%")
                    .arg(_success * 100.0 / _i, 0, 'f', 3));
    _progress->advance(1);
    TQTimer::singleShot(0, this, TQT_SLOT(step()));
}