X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fconstant.cpp;h=b2308609d774a7cfa769054de76e27610d36fa4b;hp=749803f00123abcc73f36fe5c73bf7f79448bde2;hb=073bf40a73e419a3dbcb6dfa190947ce2cc3bdce;hpb=da64e515abf7243bc4c84ca3631470931c4e6691 diff --git a/ginac/constant.cpp b/ginac/constant.cpp index 749803f0..b2308609 100644 --- a/ginac/constant.cpp +++ b/ginac/constant.cpp @@ -3,7 +3,7 @@ * Implementation of GiNaC's constant types and some special constants. */ /* - * GiNaC Copyright (C) 1999-2005 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2011 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 @@ -20,15 +20,16 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -#include -#include -#include - #include "constant.h" #include "numeric.h" #include "ex.h" #include "archive.h" #include "utils.h" +#include "inifcns.h" + +#include +#include +#include namespace GiNaC { @@ -44,7 +45,7 @@ GINAC_IMPLEMENT_REGISTERED_CLASS_OPT(constant, basic, // public -constant::constant() : basic(TINFO_constant), ef(0), serial(next_serial++) +constant::constant() : ef(0), serial(next_serial++), domain(domain::complex) { setflag(status_flags::evaluated | status_flags::expanded); } @@ -55,21 +56,21 @@ constant::constant() : basic(TINFO_constant), ef(0), serial(next_serial++) // public -constant::constant(const std::string & initname, evalffunctype efun, const std::string & texname) - : basic(TINFO_constant), name(initname), ef(efun), serial(next_serial++) +constant::constant(const std::string & initname, evalffunctype efun, const std::string & texname, unsigned dm) + : name(initname), ef(efun), serial(next_serial++), domain(dm) { if (texname.empty()) - TeX_name = "\\mbox{" + name + "}"; + TeX_name = "\\mathrm{" + name + "}"; else TeX_name = texname; setflag(status_flags::evaluated | status_flags::expanded); } -constant::constant(const std::string & initname, const numeric & initnumber, const std::string & texname) - : basic(TINFO_constant), name(initname), ef(0), number(initnumber), serial(next_serial++) +constant::constant(const std::string & initname, const numeric & initnumber, const std::string & texname, unsigned dm) + : name(initname), ef(0), number(initnumber), serial(next_serial++), domain(dm) { if (texname.empty()) - TeX_name = "\\mbox{" + name + "}"; + TeX_name = "\\mathrm{" + name + "}"; else TeX_name = texname; setflag(status_flags::evaluated | status_flags::expanded); @@ -79,25 +80,24 @@ constant::constant(const std::string & initname, const numeric & initnumber, con // archiving ////////// -constant::constant(const archive_node &n, lst &sym_lst) : inherited(n, sym_lst) {} - -ex constant::unarchive(const archive_node &n, lst &sym_lst) +void constant::read_archive(const archive_node &n, lst &sym_lst) { // Find constant by name (!! this is bad: 'twould be better if there // was a list of all global constants that we could search) std::string s; if (n.find_string("name", s)) { if (s == Pi.name) - return Pi; + *this = Pi; else if (s == Catalan.name) - return Catalan; + *this = Catalan; else if (s == Euler.name) - return Euler; + *this = Euler; else throw (std::runtime_error("unknown constant '" + s + "' in archive")); } else throw (std::runtime_error("unnamed constant in archive")); } +GINAC_BIND_UNARCHIVER(constant); void constant::archive(archive_node &n) const { @@ -131,11 +131,23 @@ void constant::do_print_latex(const print_latex & c, unsigned level) const void constant::do_print_python_repr(const print_python_repr & c, unsigned level) const { c.s << class_name() << "('" << name << "'"; - if (TeX_name != "\\mbox{" + name + "}") + if (TeX_name != "\\mathrm{" + name + "}") c.s << ",TeX_name='" << TeX_name << "'"; c.s << ')'; } +bool constant::info(unsigned inf) const +{ + if (inf == info_flags::polynomial) + return true; + if (inf == info_flags::real) + return domain==domain::real || domain==domain::positive ; + if (inf==info_flags::positive || inf==info_flags::nonnegative) + return domain == domain::positive; + else + return inherited::info(inf); +} + ex constant::evalf(int level) const { if (ef!=0) { @@ -146,6 +158,32 @@ ex constant::evalf(int level) const return *this; } +bool constant::is_polynomial(const ex & var) const +{ + return true; +} + +ex constant::conjugate() const +{ + if ( domain==domain::real || domain==domain::positive ) + return *this; + return conjugate_function(*this).hold(); +} + +ex constant::real_part() const +{ + if ( domain==domain::real || domain==domain::positive ) + return *this; + return real_part_function(*this).hold(); +} + +ex constant::imag_part() const +{ + if ( domain==domain::real || domain==domain::positive ) + return 0; + return imag_part_function(*this).hold(); +} + // protected /** Implementation of ex::diff() for a constant always returns 0. @@ -177,7 +215,8 @@ bool constant::is_equal_same_type(const basic & other) const unsigned constant::calchash() const { - hashvalue = golden_ratio_hash(tinfo() ^ serial); + const void* typeid_this = (const void*)typeid(*this).name(); + hashvalue = golden_ratio_hash((p_int)typeid_this ^ serial); setflag(status_flags::hash_calculated); @@ -207,13 +246,13 @@ unsigned constant::next_serial = 0; ////////// /** Pi. (3.14159...) Diverts straight into CLN for evalf(). */ -const constant Pi("Pi", PiEvalf, "\\pi"); +const constant Pi("Pi", PiEvalf, "\\pi", domain::positive); /** Euler's constant. (0.57721...) Sometimes called Euler-Mascheroni constant. * Diverts straight into CLN for evalf(). */ -const constant Euler("Euler", EulerEvalf, "\\gamma_E"); +const constant Euler("Euler", EulerEvalf, "\\gamma_E", domain::positive); /** Catalan's constant. (0.91597...) Diverts straight into CLN for evalf(). */ -const constant Catalan("Catalan", CatalanEvalf, "G"); +const constant Catalan("Catalan", CatalanEvalf, "G", domain::positive); } // namespace GiNaC