* Implementation of GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2003 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 <string>
#include <stdexcept>
+#include <iostream>
#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() : basic(TINFO_constant), ef(0), number(0), serial(next_serial++) {}
// 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;
+ TeX_name = other.TeX_name;
+ serial = other.serial;
+ ef = other.ef;
+ if (other.number != 0)
number = new numeric(*other.number);
- } else {
+ else
number = 0;
- }
}
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)
+constant::constant(const std::string & initname, evalffunctype efun, const std::string & texname)
: basic(TINFO_constant), name(initname), ef(efun), number(0), serial(next_serial++)
{
- debugmsg("constant constructor from string, function",LOGLEVEL_CONSTRUCT);
+ if (texname.empty())
+ TeX_name = "\\mbox{" + name + "}";
+ else
+ TeX_name = texname;
+ setflag(status_flags::evaluated | status_flags::expanded);
}
-constant::constant(const std::string & initname, const numeric & initnumber)
+constant::constant(const std::string & initname, const numeric & initnumber, const std::string & texname)
: basic(TINFO_constant), name(initname), ef(0), number(new numeric(initnumber)), serial(next_serial++)
{
- debugmsg("constant constructor from string, numeric",LOGLEVEL_CONSTRUCT);
+ if (texname.empty())
+ TeX_name = "\\mbox{" + name + "}";
+ else
+ TeX_name = texname;
+ setflag(status_flags::evaluated | status_flags::expanded);
}
//////////
// 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);
-}
+constant::constant(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst) {}
-/** 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);
}
//////////
-// functions overriding virtual functions from bases classes
+// functions overriding virtual functions from base classes
//////////
// public
-void constant::print(std::ostream & os, unsigned upper_precedence) const
-{
- debugmsg("constant print",LOGLEVEL_PRINT);
- os << name;
-}
-
-void constant::printraw(std::ostream & os) const
-{
- debugmsg("constant printraw",LOGLEVEL_PRINT);
- os << "constant(" << name << ")";
-}
-
-void constant::printtree(std::ostream & os, unsigned indent) 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;
-}
-
-void constant::printcsrc(std::ostream & os, unsigned type, unsigned upper_precedence) const
-{
- debugmsg("constant print csrc",LOGLEVEL_PRINT);
- os << name;
+void constant::print(const print_context & c, unsigned level) const
+{
+ if (is_a<print_tree>(c)) {
+ c.s << std::string(level, ' ') << name << " (" << class_name() << ")"
+ << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
+ << std::endl;
+ } else if (is_a<print_latex>(c)) {
+ c.s << TeX_name;
+ } else if (is_a<print_python_repr>(c)) {
+ c.s << class_name() << "('" << name << "'";
+ if (TeX_name != "\\mbox{" + name + "}")
+ c.s << ",TeX_name='" << TeX_name << "'";
+ c.s << ')';
+ } else
+ c.s << name;
}
ex constant::evalf(int level) const
if (ef!=0) {
return ef();
} else if (number != 0) {
- return *number;
+ return number->evalf();
}
return *this;
}
// protected
-/** Implementation of ex::diff() for a constant. It always returns 0.
+/** Implementation of ex::diff() for a constant always returns 0.
*
* @see ex::diff */
ex constant::derivative(const symbol & s) const
{
- return _ex0();
+ return _ex0;
}
int constant::compare_same_type(const basic & other) const
{
- GINAC_ASSERT(is_exactly_of_type(other, constant));
- // const constant & o=static_cast<constant &>(const_cast<basic &>(other));
- // return name.compare(o.name);
- const constant *o = static_cast<const constant *>(&other);
- if (serial==o->serial) return 0;
- return serial < o->serial ? -1 : 1;
+ GINAC_ASSERT(is_exactly_a<constant>(other));
+ const constant &o = static_cast<const constant &>(other);
+
+ if (serial == o.serial)
+ return 0;
+ else
+ return serial < o.serial ? -1 : 1;
}
bool constant::is_equal_same_type(const basic & other) const
{
- GINAC_ASSERT(is_exactly_of_type(other, constant));
- const constant *o = static_cast<const constant *>(&other);
- return serial==o->serial;
+ GINAC_ASSERT(is_exactly_a<constant>(other));
+ const constant &o = static_cast<const constant &>(other);
+
+ 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;
}
//////////
// static member variables
//////////
-unsigned constant::next_serial=0;
+unsigned constant::next_serial = 0;
//////////
// global constants
//////////
/** Pi. (3.14159...) Diverts straight into CLN for evalf(). */
-const constant Pi("Pi", PiEvalf);
+const constant Pi("Pi", PiEvalf, "\\pi");
/** Euler's constant. (0.57721...) Sometimes called Euler-Mascheroni constant.
* Diverts straight into CLN for evalf(). */
-const constant Euler("Euler", EulerEvalf);
+const constant Euler("Euler", EulerEvalf, "\\gamma_E");
/** Catalan's constant. (0.91597...) Diverts straight into CLN for evalf(). */
-const constant Catalan("Catalan", CatalanEvalf);
+const constant Catalan("Catalan", CatalanEvalf, "G");
-#ifndef NO_NAMESPACE_GINAC
} // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC
git://www.ginac.de / ginac.git / blobdiff