* Implementation of GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2001 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
#include "constant.h"
#include "numeric.h"
#include "ex.h"
+#include "print.h"
#include "archive.h"
#include "debugmsg.h"
+#include "utils.h"
-#ifndef NO_NAMESPACE_GINAC
namespace GiNaC {
-#endif // ndef NO_NAMESPACE_GINAC
GINAC_IMPLEMENT_REGISTERED_CLASS(constant, basic)
//////////
-// default constructor, destructor, copy constructor assignment operator and helpers
+// default ctor, dtor, copy ctor assignment operator and helpers
//////////
// public
constant::constant() : basic(TINFO_constant), name(""), ef(0), number(0), serial(next_serial++)
{
- debugmsg("constant default constructor",LOGLEVEL_CONSTRUCT);
-}
-
-constant::~constant()
-{
- debugmsg("constant destructor",LOGLEVEL_DESTRUCT);
- destroy(0);
-}
-
-constant::constant(const constant & other)
-{
- debugmsg("constant copy constructor",LOGLEVEL_CONSTRUCT);
- copy(other);
+ debugmsg("constant default ctor",LOGLEVEL_CONSTRUCT);
}
// protected
+/** For use by copy ctor and assignment operator. */
void constant::copy(const constant & other)
{
- basic::copy(other);
- name=other.name;
- serial=other.serial;
- ef=other.ef;
- if (other.number != 0) {
+ inherited::copy(other);
+ name = other.name;
+ serial = other.serial;
+ ef = other.ef;
+ if (other.number != 0)
number = new numeric(*other.number);
- } else {
+ else
number = 0;
- }
- // fct_assigned=other.fct_assigned;
}
void constant::destroy(bool call_parent)
{
delete number;
if (call_parent)
- basic::destroy(call_parent);
+ inherited::destroy(call_parent);
}
//////////
-// other constructors
+// other ctors
//////////
// public
constant::constant(const std::string & initname, evalffunctype efun)
: basic(TINFO_constant), name(initname), ef(efun), number(0), serial(next_serial++)
{
- debugmsg("constant constructor from string, function",LOGLEVEL_CONSTRUCT);
+ debugmsg("constant ctor from string, function",LOGLEVEL_CONSTRUCT);
+ setflag(status_flags::evaluated);
}
constant::constant(const std::string & initname, const numeric & initnumber)
: basic(TINFO_constant), name(initname), ef(0), number(new numeric(initnumber)), serial(next_serial++)
{
- debugmsg("constant constructor from string, numeric",LOGLEVEL_CONSTRUCT);
+ debugmsg("constant ctor from string, numeric",LOGLEVEL_CONSTRUCT);
+ setflag(status_flags::evaluated);
}
//////////
// archiving
//////////
-/** Construct object from archive_node. */
constant::constant(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
{
- debugmsg("constant constructor from archive_node", LOGLEVEL_CONSTRUCT);
+ debugmsg("constant ctor from archive_node", LOGLEVEL_CONSTRUCT);
}
-/** Unarchive the object. */
ex constant::unarchive(const archive_node &n, const lst &sym_lst)
{
// Find constant by name (!! this is bad: 'twould be better if there
throw (std::runtime_error("unnamed constant in archive"));
}
-/** Archive the object. */
void constant::archive(archive_node &n) const
{
inherited::archive(n);
// public
-basic * constant::duplicate() const
-{
- debugmsg("constant duplicate",LOGLEVEL_DUPLICATE);
- return new constant(*this);
-}
-
-void constant::print(std::ostream & os, unsigned upper_precedence) const
-{
- debugmsg("constant print",LOGLEVEL_PRINT);
- os << name;
+void constant::print(const print_context & c, unsigned level) const
+{
+ debugmsg("constant print", LOGLEVEL_PRINT);
+
+ if (is_of_type(c, print_tree)) {
+ c.s << std::string(level, ' ') << name << " (" << class_name() << ")"
+ << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
+ << std::endl;
+ } else if (is_of_type(c, print_latex)) {
+ if (name=="Pi")
+ c.s << "\\pi";
+ else if (name=="Euler")
+ c.s << "\\gamma_E";
+ else if (name=="Catalan")
+ c.s << "G";
+ else
+ c.s << "\\mbox{"+name+"}";
+ } else
+ c.s << name;
}
-void constant::printraw(std::ostream & os) const
+int constant::degree(const ex & s) const
{
- debugmsg("constant printraw",LOGLEVEL_PRINT);
- os << "constant(" << name << ")";
+ return is_equal(*s.bp) ? 1 : 0;
}
-void constant::printtree(std::ostream & os, unsigned indent) const
+int constant::ldegree(const ex & s) const
{
- debugmsg("constant printtree",LOGLEVEL_PRINT);
- os << std::string(indent,' ') << name
- << ", type=" << class_name()
- << ", hash=" << hashvalue
- << " (0x" << std::hex << hashvalue << std::dec << ")"
- << ", flags=" << flags << std::endl;
+ return is_equal(*s.bp) ? 1 : 0;
}
-void constant::printcsrc(std::ostream & os, unsigned type, unsigned upper_precedence) const
+ex constant::coeff(const ex & s, int n) const
{
- debugmsg("constant print csrc",LOGLEVEL_PRINT);
- os << name;
+ if (is_equal(*s.bp))
+ return n==1 ? _ex1() : _ex0();
+ else
+ return n==0 ? *this : _ex0();
}
ex constant::evalf(int level) const
if (ef!=0) {
return ef();
} else if (number != 0) {
- return *number;
+ return number->evalf();
}
return *this;
}
return serial==o->serial;
}
+unsigned constant::calchash(void) const
+{
+ hashvalue = golden_ratio_hash(tinfo() ^ serial);
+ // mask out numeric hashes:
+ hashvalue &= 0x7FFFFFFFU;
+
+ setflag(status_flags::hash_calculated);
+
+ return hashvalue;
+}
+
//////////
// new virtual functions which can be overridden by derived classes
//////////
// static member variables
//////////
-unsigned constant::next_serial=0;
+unsigned constant::next_serial = 0;
//////////
// global constants
//////////
-const constant some_constant;
-const type_info & typeid_constant=typeid(some_constant);
-
/** Pi. (3.14159...) Diverts straight into CLN for evalf(). */
const constant Pi("Pi", PiEvalf);
+
/** Euler's constant. (0.57721...) Sometimes called Euler-Mascheroni constant.
* Diverts straight into CLN for evalf(). */
const constant Euler("Euler", EulerEvalf);
+
/** Catalan's constant. (0.91597...) Diverts straight into CLN for evalf(). */
const constant Catalan("Catalan", CatalanEvalf);
-#ifndef NO_NAMESPACE_GINAC
} // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC