X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fmul.cpp;h=6a32fb58033ebb604efaa5d49a9efcaa1e0eea03;hp=aea28d6355982bbfc21a762d6ac5638cf24d3210;hb=97af29c12bb3074cfb4e674d71000f0712c51ba2;hpb=b0265215a51a081d20fe68475e080716afc2d45a diff --git a/ginac/mul.cpp b/ginac/mul.cpp index aea28d63..6a32fb58 100644 --- a/ginac/mul.cpp +++ b/ginac/mul.cpp @@ -3,7 +3,7 @@ * Implementation of GiNaC's products of expressions. */ /* - * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany * * 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 @@ -26,11 +26,15 @@ #include "mul.h" #include "add.h" #include "power.h" +#include "archive.h" #include "debugmsg.h" +#include "utils.h" -#ifndef NO_GINAC_NAMESPACE +#ifndef NO_NAMESPACE_GINAC namespace GiNaC { -#endif // ndef NO_GINAC_NAMESPACE +#endif // ndef NO_NAMESPACE_GINAC + +GINAC_IMPLEMENT_REGISTERED_CLASS(mul, expairseq) ////////// // default constructor, destructor, copy constructor assignment operator and helpers @@ -50,13 +54,13 @@ mul::~mul() destroy(0); } -mul::mul(mul const & other) +mul::mul(const mul & other) { debugmsg("mul copy constructor",LOGLEVEL_CONSTRUCT); copy(other); } -mul const & mul::operator=(mul const & other) +const mul & mul::operator=(const mul & other) { debugmsg("mul operator=",LOGLEVEL_ASSIGNMENT); if (this != &other) { @@ -68,14 +72,14 @@ mul const & mul::operator=(mul const & other) // protected -void mul::copy(mul const & other) +void mul::copy(const mul & other) { - expairseq::copy(other); + inherited::copy(other); } void mul::destroy(bool call_parent) { - if (call_parent) expairseq::destroy(call_parent); + if (call_parent) inherited::destroy(call_parent); } ////////// @@ -84,26 +88,26 @@ void mul::destroy(bool call_parent) // public -mul::mul(ex const & lh, ex const & rh) +mul::mul(const ex & lh, const ex & rh) { debugmsg("mul constructor from ex,ex",LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_mul; - overall_coeff=exONE(); + overall_coeff=_ex1(); construct_from_2_ex(lh,rh); GINAC_ASSERT(is_canonical()); } -mul::mul(exvector const & v) +mul::mul(const exvector & v) { debugmsg("mul constructor from exvector",LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_mul; - overall_coeff=exONE(); + overall_coeff=_ex1(); construct_from_exvector(v); GINAC_ASSERT(is_canonical()); } /* -mul::mul(epvector const & v, bool do_not_canonicalize) +mul::mul(const epvector & v, bool do_not_canonicalize) { debugmsg("mul constructor from epvector,bool",LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_mul; @@ -119,16 +123,16 @@ mul::mul(epvector const & v, bool do_not_canonicalize) } */ -mul::mul(epvector const & v) +mul::mul(const epvector & v) { debugmsg("mul constructor from epvector",LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_mul; - overall_coeff=exONE(); + overall_coeff=_ex1(); construct_from_epvector(v); GINAC_ASSERT(is_canonical()); } -mul::mul(epvector const & v, ex const & oc) +mul::mul(const epvector & v, const ex & oc) { debugmsg("mul constructor from epvector,ex",LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_mul; @@ -137,7 +141,7 @@ mul::mul(epvector const & v, ex const & oc) GINAC_ASSERT(is_canonical()); } -mul::mul(epvector * vp, ex const & oc) +mul::mul(epvector * vp, const ex & oc) { debugmsg("mul constructor from epvector *,ex",LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_mul; @@ -148,7 +152,7 @@ mul::mul(epvector * vp, ex const & oc) GINAC_ASSERT(is_canonical()); } -mul::mul(ex const & lh, ex const & mh, ex const & rh) +mul::mul(const ex & lh, const ex & mh, const ex & rh) { debugmsg("mul constructor from ex,ex,ex",LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_mul; @@ -157,11 +161,33 @@ mul::mul(ex const & lh, ex const & mh, ex const & rh) factors.push_back(lh); factors.push_back(mh); factors.push_back(rh); - overall_coeff=exONE(); + overall_coeff=_ex1(); construct_from_exvector(factors); GINAC_ASSERT(is_canonical()); } +////////// +// archiving +////////// + +/** Construct object from archive_node. */ +mul::mul(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst) +{ + debugmsg("mul constructor from archive_node", LOGLEVEL_CONSTRUCT); +} + +/** Unarchive the object. */ +ex mul::unarchive(const archive_node &n, const lst &sym_lst) +{ + return (new mul(n, sym_lst))->setflag(status_flags::dynallocated); +} + +/** Archive the object. */ +void mul::archive(archive_node &n) const +{ + inherited::archive(n); +} + ////////// // functions overriding virtual functions from bases classes ////////// @@ -174,23 +200,123 @@ basic * mul::duplicate() const return new mul(*this); } +void mul::print(ostream & os, unsigned upper_precedence) const +{ + debugmsg("mul print",LOGLEVEL_PRINT); + if (precedence<=upper_precedence) os << "("; + bool first=true; + // first print the overall numeric coefficient: + numeric coeff = ex_to_numeric(overall_coeff); + if (coeff.csgn()==-1) os << '-'; + if (!coeff.is_equal(_num1()) && + !coeff.is_equal(_num_1())) { + if (coeff.is_rational()) { + if (coeff.is_negative()) + os << -coeff; + else + os << coeff; + } else { + if (coeff.csgn()==-1) + (-coeff).print(os, precedence); + else + coeff.print(os, precedence); + } + os << '*'; + } + // then proceed with the remaining factors: + for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) { + if (!first) { + os << '*'; + } else { + first=false; + } + recombine_pair_to_ex(*cit).print(os,precedence); + } + if (precedence<=upper_precedence) os << ")"; +} + +void mul::printraw(ostream & os) const +{ + debugmsg("mul printraw",LOGLEVEL_PRINT); + + os << "*("; + for (epvector::const_iterator it=seq.begin(); it!=seq.end(); ++it) { + os << "("; + (*it).rest.bp->printraw(os); + os << ","; + (*it).coeff.bp->printraw(os); + os << "),"; + } + os << ",hash=" << hashvalue << ",flags=" << flags; + os << ")"; +} + +void mul::printcsrc(ostream & os, unsigned type, unsigned upper_precedence) const +{ + debugmsg("mul print csrc", LOGLEVEL_PRINT); + if (precedence <= upper_precedence) + os << "("; + + if (!overall_coeff.is_equal(_ex1())) { + overall_coeff.bp->printcsrc(os,type,precedence); + os << "*"; + } + + // Print arguments, separated by "*" or "/" + epvector::const_iterator it = seq.begin(); + epvector::const_iterator itend = seq.end(); + while (it != itend) { + + // If the first argument is a negative integer power, it gets printed as "1.0/" + if (it == seq.begin() && ex_to_numeric(it->coeff).is_integer() && it->coeff.compare(_num0()) < 0) { + if (type == csrc_types::ctype_cl_N) + os << "recip("; + else + os << "1.0/"; + } + + // If the exponent is 1 or -1, it is left out + if (it->coeff.compare(_ex1()) == 0 || it->coeff.compare(_num_1()) == 0) + it->rest.bp->printcsrc(os, type, precedence); + else + // outer parens around ex needed for broken gcc-2.95 parser: + (ex(power(it->rest, abs(ex_to_numeric(it->coeff))))).bp->printcsrc(os, type, upper_precedence); + + // Separator is "/" for negative integer powers, "*" otherwise + it++; + if (it != itend) { + if (ex_to_numeric(it->coeff).is_integer() && it->coeff.compare(_num0()) < 0) + os << "/"; + else + os << "*"; + } + } + if (precedence <= upper_precedence) + os << ")"; +} + bool mul::info(unsigned inf) const { // TODO: optimize - if (inf==info_flags::polynomial || inf==info_flags::integer_polynomial || inf==info_flags::rational_polynomial || inf==info_flags::rational_function) { + if (inf==info_flags::polynomial || + inf==info_flags::integer_polynomial || + inf==info_flags::cinteger_polynomial || + inf==info_flags::rational_polynomial || + inf==info_flags::crational_polynomial || + inf==info_flags::rational_function) { for (epvector::const_iterator it=seq.begin(); it!=seq.end(); ++it) { if (!(recombine_pair_to_ex(*it).info(inf))) return false; } - return true; + return overall_coeff.info(inf); } else { - return expairseq::info(inf); + return inherited::info(inf); } } typedef vector intvector; -int mul::degree(symbol const & s) const +int mul::degree(const symbol & s) const { int deg_sum=0; for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) { @@ -199,7 +325,7 @@ int mul::degree(symbol const & s) const return deg_sum; } -int mul::ldegree(symbol const & s) const +int mul::ldegree(const symbol & s) const { int deg_sum=0; for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) { @@ -208,7 +334,7 @@ int mul::ldegree(symbol const & s) const return deg_sum; } -ex mul::coeff(symbol const & s, int const n) const +ex mul::coeff(const symbol & s, int n) const { exvector coeffseq; coeffseq.reserve(seq.size()+1); @@ -243,7 +369,7 @@ ex mul::coeff(symbol const & s, int const n) const return (new mul(coeffseq))->setflag(status_flags::dynallocated); } - return exZERO(); + return _ex0(); } ex mul::eval(int level) const @@ -281,25 +407,25 @@ ex mul::eval(int level) const if (flags & status_flags::evaluated) { GINAC_ASSERT(seq.size()>0); - GINAC_ASSERT((seq.size()>1)||!overall_coeff.is_equal(exONE())); + GINAC_ASSERT((seq.size()>1)||!overall_coeff.is_equal(_ex1())); return *this; } int seq_size=seq.size(); - if (overall_coeff.is_equal(exZERO())) { + if (overall_coeff.is_equal(_ex0())) { // *(...,x;0) -> 0 - return exZERO(); + return _ex0(); } else if (seq_size==0) { // *(;c) -> c return overall_coeff; - } else if ((seq_size==1)&&overall_coeff.is_equal(exONE())) { + } else if ((seq_size==1)&&overall_coeff.is_equal(_ex1())) { // *(x;1) -> x return recombine_pair_to_ex(*(seq.begin())); } else if ((seq_size==1) && is_ex_exactly_of_type((*seq.begin()).rest,add) && - ex_to_numeric((*seq.begin()).coeff).is_equal(numONE())) { + ex_to_numeric((*seq.begin()).coeff).is_equal(_num1())) { // *(+(x,y,...);c) -> +(*(x,c),*(y,c),...) (c numeric(), no powers of +()) - add const & addref=ex_to_add((*seq.begin()).rest); + const add & addref=ex_to_add((*seq.begin()).rest); epvector distrseq; distrseq.reserve(addref.seq.size()); for (epvector::const_iterator cit=addref.seq.begin(); cit!=addref.seq.end(); ++cit) { @@ -329,21 +455,39 @@ exvector mul::get_indices(void) const return iv; } -ex mul::simplify_ncmul(exvector const & v) const +ex mul::simplify_ncmul(const exvector & v) const { throw(std::logic_error("mul::simplify_ncmul() should never have been called!")); } // protected -int mul::compare_same_type(basic const & other) const +/** Implementation of ex::diff() for a product. It applies the product rule. + * @see ex::diff */ +ex mul::derivative(const symbol & s) const +{ + exvector new_seq; + new_seq.reserve(seq.size()); + + // D(a*b*c)=D(a)*b*c+a*D(b)*c+a*b*D(c) + for (unsigned i=0; i!=seq.size(); i++) { + epvector sub_seq=seq; + sub_seq[i] = split_ex_to_pair(sub_seq[i].coeff* + power(sub_seq[i].rest,sub_seq[i].coeff-1)* + sub_seq[i].rest.diff(s)); + new_seq.push_back((new mul(sub_seq,overall_coeff))->setflag(status_flags::dynallocated)); + } + return (new add(new_seq))->setflag(status_flags::dynallocated); +} + +int mul::compare_same_type(const basic & other) const { - return expairseq::compare_same_type(other); + return inherited::compare_same_type(other); } -bool mul::is_equal_same_type(basic const & other) const +bool mul::is_equal_same_type(const basic & other) const { - return expairseq::is_equal_same_type(other); + return inherited::is_equal_same_type(other); } unsigned mul::return_type(void) const @@ -366,10 +510,10 @@ unsigned mul::return_type(void) const all_commutative=0; } if ((rt==return_types::noncommutative)&&(!all_commutative)) { - // another nc element found, compare type_infos + // another nc element found, compare type_infos if ((*cit_noncommutative_element).rest.return_type_tinfo()!=(*cit).rest.return_type_tinfo()) { - // diffent types -> mul is ncc - return return_types::noncommutative_composite; + // diffent types -> mul is ncc + return return_types::noncommutative_composite; } } } @@ -393,58 +537,58 @@ unsigned mul::return_type_tinfo(void) const return tinfo_key; } -ex mul::thisexpairseq(epvector const & v, ex const & oc) const +ex mul::thisexpairseq(const epvector & v, const ex & oc) const { return (new mul(v,oc))->setflag(status_flags::dynallocated); } -ex mul::thisexpairseq(epvector * vp, ex const & oc) const +ex mul::thisexpairseq(epvector * vp, const ex & oc) const { return (new mul(vp,oc))->setflag(status_flags::dynallocated); } -expair mul::split_ex_to_pair(ex const & e) const +expair mul::split_ex_to_pair(const ex & e) const { if (is_ex_exactly_of_type(e,power)) { - power const & powerref=ex_to_power(e); + const power & powerref=ex_to_power(e); if (is_ex_exactly_of_type(powerref.exponent,numeric)) { return expair(powerref.basis,powerref.exponent); } } - return expair(e,exONE()); + return expair(e,_ex1()); } -expair mul::combine_ex_with_coeff_to_pair(ex const & e, - ex const & c) const +expair mul::combine_ex_with_coeff_to_pair(const ex & e, + const ex & c) const { // to avoid duplication of power simplification rules, // we create a temporary power object // otherwise it would be hard to correctly simplify // expression like (4^(1/3))^(3/2) - if (are_ex_trivially_equal(c,exONE())) { + if (are_ex_trivially_equal(c,_ex1())) { return split_ex_to_pair(e); } return split_ex_to_pair(power(e,c)); } -expair mul::combine_pair_with_coeff_to_pair(expair const & p, - ex const & c) const +expair mul::combine_pair_with_coeff_to_pair(const expair & p, + const ex & c) const { // to avoid duplication of power simplification rules, // we create a temporary power object // otherwise it would be hard to correctly simplify // expression like (4^(1/3))^(3/2) - if (are_ex_trivially_equal(c,exONE())) { + if (are_ex_trivially_equal(c,_ex1())) { return p; } return split_ex_to_pair(power(recombine_pair_to_ex(p),c)); } -ex mul::recombine_pair_to_ex(expair const & p) const +ex mul::recombine_pair_to_ex(const expair & p) const { - // if (p.coeff.compare(exONE())==0) { - // if (are_ex_trivially_equal(p.coeff,exONE())) { - if (ex_to_numeric(p.coeff).is_equal(numONE())) { + // if (p.coeff.compare(_ex1())==0) { + // if (are_ex_trivially_equal(p.coeff,_ex1())) { + if (ex_to_numeric(p.coeff).is_equal(_num1())) { return p.rest; } else { return power(p.rest,p.coeff); @@ -466,7 +610,7 @@ bool mul::expair_needs_further_processing(epp it) *it=ep; return true; } - if (ex_to_numeric((*it).coeff).is_equal(numONE())) { + if (ex_to_numeric((*it).coeff).is_equal(_num1())) { // combined pair has coeff 1 and must be moved to the end return true; } @@ -476,17 +620,17 @@ bool mul::expair_needs_further_processing(epp it) ex mul::default_overall_coeff(void) const { - return exONE(); + return _ex1(); } -void mul::combine_overall_coeff(ex const & c) +void mul::combine_overall_coeff(const ex & c) { GINAC_ASSERT(is_ex_exactly_of_type(overall_coeff,numeric)); GINAC_ASSERT(is_ex_exactly_of_type(c,numeric)); overall_coeff = ex_to_numeric(overall_coeff).mul_dyn(ex_to_numeric(c)); } -void mul::combine_overall_coeff(ex const & c1, ex const & c2) +void mul::combine_overall_coeff(const ex & c1, const ex & c2) { GINAC_ASSERT(is_ex_exactly_of_type(overall_coeff,numeric)); GINAC_ASSERT(is_ex_exactly_of_type(c1,numeric)); @@ -495,13 +639,13 @@ void mul::combine_overall_coeff(ex const & c1, ex const & c2) mul_dyn(ex_to_numeric(c1).power(ex_to_numeric(c2))); } -bool mul::can_make_flat(expair const & p) const +bool mul::can_make_flat(const expair & p) const { GINAC_ASSERT(is_ex_exactly_of_type(p.coeff,numeric)); // this assertion will probably fail somewhere // it would require a more careful make_flat, obeying the power laws // probably should return true only if p.coeff is integer - return ex_to_numeric(p.coeff).is_equal(numONE()); + return ex_to_numeric(p.coeff).is_equal(_num1()); } ex mul::expand(unsigned options) const @@ -512,7 +656,7 @@ ex mul::expand(unsigned options) const epvector * expanded_seqp=expandchildren(options); - epvector const & expanded_seq = expanded_seqp==0 ? seq : *expanded_seqp; + const epvector & expanded_seq = expanded_seqp==0 ? seq : *expanded_seqp; positions_of_adds.resize(expanded_seq.size()); number_of_add_operands.resize(expanded_seq.size()); @@ -524,10 +668,10 @@ ex mul::expand(unsigned options) const epvector::const_iterator last=expanded_seq.end(); for (epvector::const_iterator cit=expanded_seq.begin(); cit!=last; ++cit) { if (is_ex_exactly_of_type((*cit).rest,add)&& - (ex_to_numeric((*cit).coeff).is_equal(numONE()))) { + (ex_to_numeric((*cit).coeff).is_equal(_num1()))) { positions_of_adds[number_of_adds]=current_position; - add const & expanded_addref=ex_to_add((*cit).rest); - int addref_nops=expanded_addref.nops(); + const add & expanded_addref=ex_to_add((*cit).rest); + unsigned addref_nops=expanded_addref.nops(); number_of_add_operands[number_of_adds]=addref_nops; number_of_expanded_terms *= addref_nops; number_of_adds++; @@ -559,8 +703,8 @@ ex mul::expand(unsigned options) const epvector term; term=expanded_seq; for (l=0; l