pow-nroot.hpp /usr/include/gecode/float/arithmetic.hh /usr/include/gecode/float/arithmetic/pow-nroot.hpp /usr/include/gecode/float/arithmetic.hh Gecode Gecode::Float Gecode::Float::Arithmetic /*-*-mode:C++;c-basic-offset:2;indent-tabs-mode:nil-*-*/ /* *Mainauthors: *VincentBarichard<Vincent.Barichard@univ-angers.fr> * *Copyright: *VincentBarichard,2012 * *Lastmodified: *$Date:2013-01-3010:22:34+0100(Wed,30Jan2013)$by$Author:vbarichard$ *$Revision:13250$ * *ThisfileispartofGecode,thegenericconstraint *developmentenvironment: *http://www.gecode.org * *Permissionisherebygranted,freeofcharge,toanypersonobtaining *acopyofthissoftwareandassociateddocumentationfiles(the *"Software"),todealintheSoftwarewithoutrestriction,including *withoutlimitationtherightstouse,copy,modify,merge,publish, *distribute,sublicense,and/orsellcopiesoftheSoftware,andto *permitpersonstowhomtheSoftwareisfurnishedtodoso,subjectto *thefollowingconditions: * *Theabovecopyrightnoticeandthispermissionnoticeshallbe *includedinallcopiesorsubstantialportionsoftheSoftware. * *THESOFTWAREISPROVIDED"ASIS",WITHOUTWARRANTYOFANYKIND, *EXPRESSORIMPLIED,INCLUDINGBUTNOTLIMITEDTOTHEWARRANTIESOF *MERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEAND *NONINFRINGEMENT.INNOEVENTSHALLTHEAUTHORSORCOPYRIGHTHOLDERSBE *LIABLEFORANYCLAIM,DAMAGESOROTHERLIABILITY,WHETHERINANACTION *OFCONTRACT,TORTOROTHERWISE,ARISINGFROM,OUTOFORINCONNECTION *WITHTHESOFTWAREORTHEUSEOROTHERDEALINGSINTHESOFTWARE. * */ namespaceGecode{namespaceFloat{namespaceArithmetic{ /* *Boundsconsistentsquareoperator * */ template<classA,classB> forceinline Pow<A,B>::Pow(Homehome,Ax0,Bx1,intn) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1),m_n(n){} template<classA,classB> ExecStatus Pow<A,B>::post(Homehome,Ax0,Bx1,intn){ if(n==0){ if((x0.min()==0.0)&&(x0.max()==0.0))returnES_FAILED; GECODE_ME_CHECK(x1.eq(home,1.0)); returnES_OK; } GECODE_ME_CHECK(x1.eq(home,pow(x0.domain(),n))); if((x1.min()==0.0)&&(x1.max()==0.0)){ GECODE_ME_CHECK(x1.eq(home,0.0)); returnES_OK; } if((n%2)==0) { if(x0.min()>=0) GECODE_ME_CHECK(x0.eq(home,nroot(x1.domain(),n))); elseif(x0.max()<=0) GECODE_ME_CHECK(x0.eq(home,-nroot(x1.domain(),n))); else GECODE_ME_CHECK(x0.eq(home, hull( nroot(x1.domain(),n), -nroot(x1.domain(),n) ) )); }else GECODE_ME_CHECK(x0.eq(home,nroot(x1.domain(),n))); if(!x0.assigned())(void)new(home)Pow<A,B>(home,x0,x1,n); returnES_OK; } template<classA,classB> forceinline Pow<A,B>::Pow(Space&home,boolshare,Pow<A,B>&p) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p),m_n(p.m_n){} template<classA,classB> Actor* Pow<A,B>::copy(Space&home,boolshare){ returnnew(home)Pow<A,B>(home,share,*this); } template<classA,classB> ExecStatus Pow<A,B>::propagate(Space&home,constModEventDelta&){ if((x0.min()==0.0)&&(x0.max()==0.0))returnES_FAILED; GECODE_ME_CHECK(x1.eq(home,pow(x0.domain(),m_n))); if((x1.min()==0.0)&&(x1.max()==0.0)){ GECODE_ME_CHECK(x1.eq(home,0.0)); returnhome.ES_SUBSUMED(*this); } if((m_n%2)==0) { if(x0.min()>=0) GECODE_ME_CHECK(x0.eq(home,nroot(x1.domain(),m_n))); elseif(x0.max()<=0) GECODE_ME_CHECK(x0.eq(home,-nroot(x1.domain(),m_n))); else GECODE_ME_CHECK(x0.eq(home, hull( nroot(x1.domain(),m_n), -nroot(x1.domain(),m_n) ) )); }else GECODE_ME_CHECK(x0.eq(home,nroot(x1.domain(),m_n))); returnx0.assigned()?home.ES_SUBSUMED(*this):ES_FIX; } /* *Boundsconsistentsquarerootoperator * */ template<classA,classB> forceinline NthRoot<A,B>::NthRoot(Homehome,Ax0,Bx1,intn) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1),m_n(n){} template<classA,classB> ExecStatus NthRoot<A,B>::post(Homehome,Ax0,Bx1,intn){ if(n==0)returnES_FAILED; GECODE_ME_CHECK(x0.gq(home,0.0)); (void)new(home)NthRoot<A,B>(home,x0,x1,n); returnES_OK; } template<classA,classB> forceinline NthRoot<A,B>::NthRoot(Space&home,boolshare,NthRoot<A,B>&p) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p),m_n(p.m_n){} template<classA,classB> Actor* NthRoot<A,B>::copy(Space&home,boolshare){ returnnew(home)NthRoot<A,B>(home,share,*this); } template<classA,classB> ExecStatus NthRoot<A,B>::propagate(Space&home,constModEventDelta&){ GECODE_ME_CHECK(x1.eq(home,nroot(x0.domain(),m_n))); GECODE_ME_CHECK(x0.eq(home,pow(x1.domain(),m_n))); returnx0.assigned()?home.ES_SUBSUMED(*this):ES_FIX; } }}} //STATISTICS:float-prop