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00042 #include <algorithm>
00043 #include <gecode/search.hh>
00044
00045 namespace Gecode { namespace Search {
00046
00047 unsigned long int
00048 CutoffConstant::operator ()(void) const {
00049 return c;
00050 }
00051 unsigned long int
00052 CutoffConstant::operator ++(void) {
00053 return c;
00054 }
00055
00056
00057 unsigned long int
00058 CutoffLinear::operator ()(void) const {
00059 return n;
00060 }
00061 unsigned long int
00062 CutoffLinear::operator ++(void) {
00063 n += scale;
00064 return n;
00065 }
00066
00067
00068 unsigned long int
00069 CutoffLuby::start[CutoffLuby::n_start] = {
00070 1,1,2,1,1,2,4,1,1,2,1,1,2,4,8,1,1,2,1,1,2,4,1,1,2,1,1,2,4,8,16,
00071 1,1,2,1,1,2,4,1,1,2,1,1,2,4,8,1,1,2,1,1,2,4,1,1,2,1,1,2,4,8,16,32
00072 };
00073 unsigned long int
00074 CutoffLuby::operator ()(void) const {
00075 return scale*luby(i);
00076 }
00077 unsigned long int
00078 CutoffLuby::operator ++(void) {
00079 return scale*luby(i++);
00080 }
00081
00082
00083 unsigned long int
00084 CutoffGeometric::operator ()(void) const {
00085 return static_cast<unsigned long int>(scale * n);
00086 }
00087 unsigned long int
00088 CutoffGeometric::operator ++(void) {
00089 n *= base;
00090 return static_cast<unsigned long int>(scale * n);
00091 }
00092
00093
00094 unsigned long int
00095 CutoffRandom::operator ++(void) {
00096 cur = min+step*rnd(n);
00097 return cur;
00098 }
00099 unsigned long int
00100 CutoffRandom::operator ()(void) const {
00101 return cur;
00102 }
00103
00104
00105 unsigned long int
00106 CutoffAppend::operator ()(void) const {
00107 if (n > 0) {
00108 return (*c1)();
00109 } else {
00110 return (*c2)();
00111 }
00112 }
00113 unsigned long int
00114 CutoffAppend::operator ++(void) {
00115 if (n > 0) {
00116 n--;
00117 return ++(*c1);
00118 } else {
00119 return ++(*c2);
00120 }
00121 }
00122
00123
00124 unsigned long int
00125 CutoffMerge::operator ()(void) const {
00126 return (*c1)();
00127 }
00128 unsigned long int
00129 CutoffMerge::operator ++(void) {
00130 (void) ++(*c1);
00131 std::swap(c1,c2);
00132 return (*c1)();
00133 }
00134
00135
00136 unsigned long int
00137 CutoffRepeat::operator ()(void) const {
00138 return cutoff;
00139 }
00140 unsigned long int
00141 CutoffRepeat::operator ++(void) {
00142 i++;
00143 if (i == n) {
00144 cutoff = (*c)();
00145 i = 0;
00146 }
00147 return cutoff;
00148 }
00149
00150
00151 Cutoff*
00152 Cutoff::constant(unsigned long int scale) {
00153 return new CutoffConstant(scale);
00154 }
00155 Cutoff*
00156 Cutoff::linear(unsigned long int scale) {
00157 return new CutoffLinear(scale);
00158 }
00159 Cutoff*
00160 Cutoff::luby(unsigned long int scale) {
00161 return new CutoffLuby(scale);
00162 }
00163 Cutoff*
00164 Cutoff::geometric(unsigned long int base, double scale) {
00165 return new CutoffGeometric(base,scale);
00166 }
00167 Cutoff*
00168 Cutoff::rnd(unsigned int seed,
00169 unsigned long int min,
00170 unsigned long int max,
00171 unsigned long int n) {
00172 return new CutoffRandom(seed,min,max,n);
00173 }
00174 Cutoff*
00175 Cutoff::append(Cutoff* c1, unsigned long int n, Cutoff* c2) {
00176 return new CutoffAppend(c1,n,c2);
00177 }
00178 Cutoff*
00179 Cutoff::merge(Cutoff* c1, Cutoff* c2) {
00180 return new CutoffMerge(c1,c2);
00181 }
00182 Cutoff*
00183 Cutoff::repeat(Cutoff* c, unsigned long int n) {
00184 return new CutoffRepeat(c,n);
00185 }
00186
00187 }}
00188
00189