exp-log.hpp Gecode Gecode::Float Gecode::Float::Transcendental /*-*-mode:C++;c-basic-offset:2;indent-tabs-mode:nil-*-*/ /* *Mainauthors: *VincentBarichard<Vincent.Barichard@univ-angers.fr> * *Copyright: *VincentBarichard,2012 * *Lastmodified: *$Date:2012-07-2710:25:47+0200(Fri,27Jul2012)$by$Author:vbarichard$ *$Revision:12971$ * *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{namespaceTranscendental{ /* *Boundsconsistentexponentialoperator * */ template<classA,classB> forceinline Exp<A,B>::Exp(Homehome,Ax0,Bx1) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1){} template<classA,classB> ExecStatus Exp<A,B>::post(Homehome,Ax0,Bx1){ if(same(x0,x1)){ returnES_FAILED; }else{ GECODE_ME_CHECK(x1.gq(home,0.0)); } (void)new(home)Exp<A,B>(home,x0,x1); returnES_OK; } template<classA,classB> forceinline Exp<A,B>::Exp(Space&home,boolshare,Exp<A,B>&p) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p){} template<classA,classB> Actor* Exp<A,B>::copy(Space&home,boolshare){ returnnew(home)Exp<A,B>(home,share,*this); } template<classA,classB> ExecStatus Exp<A,B>::propagate(Space&home,constModEventDelta&){ GECODE_ME_CHECK(x1.eq(home,exp(x0.domain()))); if(x1.max()==0.0) returnES_FAILED; GECODE_ME_CHECK(x0.eq(home,log(x1.domain()))); returnx0.assigned()?home.ES_SUBSUMED(*this):ES_FIX; } /* *Boundsconsistentlogarithmoperatorwithbase * */ template<classA,classB> forceinline Pow<A,B>::Pow(Homehome,FloatNumbase0,Ax0,Bx1) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1), base(base0){} template<classA,classB> ExecStatus Pow<A,B>::post(Homehome,FloatNumbase,Ax0,Bx1){ if(base<=0)returnES_FAILED; if(same(x0,x1)){ GECODE_ME_CHECK(x0.eq(home,0.0)); }else{ GECODE_ME_CHECK(x1.gq(home,0.0)); (void)new(home)Pow<A,B>(home,base,x0,x1); } 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), base(p.base){} 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(x1.max()==0.0) returnES_FAILED; GECODE_ME_CHECK(x0.eq(home,log(x1.domain())/log(base))); GECODE_ME_CHECK(x1.eq(home,exp(x0.domain()*log(base)))); returnx0.assigned()?home.ES_SUBSUMED(*this):ES_FIX; } }}} //STATISTICS:float-prop