* Implementation of sequences of expression pairs. */
/*
- * 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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <iostream>
#include <algorithm>
#include <string>
#include <stdexcept>
#include "expairseq.h"
#include "lst.h"
+#include "mul.h"
+#include "power.h"
#include "relational.h"
+#include "wildcard.h"
#include "print.h"
#include "archive.h"
-#include "debugmsg.h"
+#include "operators.h"
#include "utils.h"
#if EXPAIRSEQ_USE_HASHTAB
namespace GiNaC {
-GINAC_IMPLEMENT_REGISTERED_CLASS_NO_CTORS(expairseq, basic)
+
+GINAC_IMPLEMENT_REGISTERED_CLASS(expairseq, basic)
//////////
// helper classes
};
//////////
-// default ctor, dtor, copy ctor assignment operator and helpers
+// default constructor
//////////
// public
-expairseq::expairseq(const expairseq &other)
-{
- debugmsg("expairseq copy ctor",LOGLEVEL_CONSTRUCT);
- copy(other);
-}
-
-const expairseq &expairseq::operator=(const expairseq &other)
-{
- debugmsg("expairseq operator=",LOGLEVEL_ASSIGNMENT);
- if (this != &other) {
- destroy(true);
- copy(other);
- }
- return *this;
-}
+expairseq::expairseq() : inherited(TINFO_expairseq)
+#if EXPAIRSEQ_USE_HASHTAB
+ , hashtabsize(0)
+#endif // EXPAIRSEQ_USE_HASHTAB
+{}
// protected
+#if 0
/** For use by copy ctor and assignment operator. */
void expairseq::copy(const expairseq &other)
{
- inherited::copy(other);
seq = other.seq;
overall_coeff = other.overall_coeff;
#if EXPAIRSEQ_USE_HASHTAB
}
#endif // EXPAIRSEQ_USE_HASHTAB
}
-
-DEFAULT_DESTROY(expairseq)
+#endif
//////////
-// other ctors
+// other constructors
//////////
expairseq::expairseq(const ex &lh, const ex &rh) : inherited(TINFO_expairseq)
{
- debugmsg("expairseq ctor from ex,ex",LOGLEVEL_CONSTRUCT);
construct_from_2_ex(lh,rh);
GINAC_ASSERT(is_canonical());
}
expairseq::expairseq(const exvector &v) : inherited(TINFO_expairseq)
{
- debugmsg("expairseq ctor from exvector",LOGLEVEL_CONSTRUCT);
construct_from_exvector(v);
GINAC_ASSERT(is_canonical());
}
expairseq::expairseq(const epvector &v, const ex &oc)
: inherited(TINFO_expairseq), overall_coeff(oc)
{
- debugmsg("expairseq ctor from epvector,ex",LOGLEVEL_CONSTRUCT);
+ GINAC_ASSERT(is_a<numeric>(oc));
construct_from_epvector(v);
GINAC_ASSERT(is_canonical());
}
expairseq::expairseq(epvector *vp, const ex &oc)
: inherited(TINFO_expairseq), overall_coeff(oc)
{
- debugmsg("expairseq ctor from epvector *,ex",LOGLEVEL_CONSTRUCT);
GINAC_ASSERT(vp!=0);
+ GINAC_ASSERT(is_a<numeric>(oc));
construct_from_epvector(*vp);
delete vp;
GINAC_ASSERT(is_canonical());
// archiving
//////////
-expairseq::expairseq(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
+expairseq::expairseq(const archive_node &n, lst &sym_lst) : inherited(n, sym_lst)
#if EXPAIRSEQ_USE_HASHTAB
, hashtabsize(0)
#endif
{
- debugmsg("expairseq ctor from archive_node", LOGLEVEL_CONSTRUCT);
for (unsigned int i=0; true; i++) {
ex rest;
ex coeff;
else
break;
}
+
n.find_ex("overall_coeff", overall_coeff, sym_lst);
+
+ canonicalize();
+ GINAC_ASSERT(is_canonical());
}
void expairseq::archive(archive_node &n) const
DEFAULT_UNARCHIVE(expairseq)
//////////
-// functions overriding virtual functions from bases classes
+// functions overriding virtual functions from base classes
//////////
// public
-basic *expairseq::duplicate() const
-{
- debugmsg("expairseq duplicate",LOGLEVEL_DUPLICATE);
- return new expairseq(*this);
-}
-
-void expairseq::print(const print_context & c, unsigned level) const
+void expairseq::print(const print_context &c, unsigned level) const
{
- debugmsg("expairseq print",LOGLEVEL_PRINT);
-
- if (is_of_type(c, print_tree)) {
+ if (is_a<print_tree>(c)) {
unsigned delta_indent = static_cast<const print_tree &>(c).delta_indent;
<< std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
<< ", nops=" << nops()
<< std::endl;
- for (unsigned i=0; i<seq.size(); ++i) {
+ size_t num = seq.size();
+ for (size_t i=0; i<num; ++i) {
seq[i].rest.print(c, level + delta_indent);
seq[i].coeff.print(c, level + delta_indent);
- if (i != seq.size()-1)
+ if (i != num - 1)
c.s << std::string(level + delta_indent, ' ') << "-----" << std::endl;
}
if (!overall_coeff.is_equal(default_overall_coeff())) {
c.s << *it-seq.begin() << " ";
++this_bin_fill;
}
- os << std::endl;
+ c.s << std::endl;
cum_fill += this_bin_fill;
cum_fill_sq += this_bin_fill*this_bin_fill;
}
return inherited::info(inf);
}
-unsigned expairseq::nops() const
+size_t expairseq::nops() const
{
if (overall_coeff.is_equal(default_overall_coeff()))
return seq.size();
return seq.size()+1;
}
-ex expairseq::op(int i) const
+ex expairseq::op(size_t i) const
{
- if (unsigned(i)<seq.size())
+ if (i < seq.size())
return recombine_pair_to_ex(seq[i]);
GINAC_ASSERT(!overall_coeff.is_equal(default_overall_coeff()));
return overall_coeff;
}
-ex &expairseq::let_op(int i)
-{
- throw(std::logic_error("let_op not defined for expairseq and derived classes (add,mul,...)"));
-}
-
-ex expairseq::map(map_function & f) const
+ex expairseq::map(map_function &f) const
{
epvector *v = new epvector;
v->reserve(seq.size());
epvector::const_iterator cit = seq.begin(), last = seq.end();
while (cit != last) {
v->push_back(split_ex_to_pair(f(recombine_pair_to_ex(*cit))));
- cit++;
+ ++cit;
}
- return thisexpairseq(v, f(overall_coeff));
+ if (overall_coeff.is_equal(default_overall_coeff()))
+ return thisexpairseq(v, default_overall_coeff());
+ else
+ return thisexpairseq(v, f(overall_coeff));
}
+/** Perform coefficient-wise automatic term rewriting rules in this class. */
ex expairseq::eval(int level) const
{
if ((level==1) && (flags &status_flags::evaluated))
return (new expairseq(vp,overall_coeff))->setflag(status_flags::dynallocated | status_flags::evaluated);
}
-ex expairseq::evalf(int level) const
-{
- return thisexpairseq(evalfchildren(level),overall_coeff.evalf(level-1));
-}
-
-ex expairseq::normal(lst &sym_lst, lst &repl_lst, int level) const
-{
- ex n = thisexpairseq(normalchildren(level),overall_coeff);
- return n.bp->basic::normal(sym_lst,repl_lst,level);
-}
-
bool expairseq::match(const ex & pattern, lst & repl_lst) const
{
// This differs from basic::match() because we want "a+b+c+d" to
// match "d+*+b" with "*" being "a+c", and we want to honor commutativity
- if (tinfo() == pattern.bp->tinfo()) {
+ if (this->tinfo() == ex_to<basic>(pattern).tinfo()) {
// Check whether global wildcard (one that matches the "rest of the
// expression", like "*" above) is present
bool has_global_wildcard = false;
ex global_wildcard;
- for (
unsigned int i=0; i<pattern.nops(); i++) {
- if (is_ex_exactly_of_type(pattern.op(i), wildcard)) {
+ for (
size_t i=0; i<pattern.nops(); i++) {
+ if (is_exactly_a<wildcard>(pattern.op(i))) {
has_global_wildcard = true;
global_wildcard = pattern.op(i);
break;
// Chop into terms
exvector ops;
ops.reserve(nops());
- for (unsigned i=0; i<nops(); i++)
+ for (size_t i=0; i<nops(); i++)
ops.push_back(op(i));
// Now, for every term of the pattern, look for a matching term in
// the expression and remove the match
- for (
unsigned i=0; i<pattern.nops(); i++) {
+ for (
size_t i=0; i<pattern.nops(); i++) {
ex p = pattern.op(i);
if (has_global_wildcard && p.is_equal(global_wildcard))
continue;
ops.erase(it);
goto found;
}
- it++;
+ ++it;
}
return false; // no match found
found: ;
// Assign all the remaining terms to the global wildcard (unless
// it has already been matched before, in which case the matches
// must be equal)
+ size_t num = ops.size();
epvector *vp = new epvector();
- vp->reserve(ops.size());
- for (unsigned i=0; i<ops.size(); i++)
+ vp->reserve(num);
+ for (size_t i=0; i<num; i++)
vp->push_back(split_ex_to_pair(ops[i]));
ex rest = thisexpairseq(vp, default_overall_coeff());
- for (unsigned i=0; i<repl_lst.nops(); i++) {
- if (repl_lst.op(i).op(0).is_equal(global_wildcard))
- return rest.is_equal(*repl_lst.op(i).op(1).bp);
+ for (lst::const_iterator it = repl_lst.begin(); it != repl_lst.end(); ++it) {
+ if (it->op(0).is_equal(global_wildcard))
+ return rest.is_equal(it->op(1));
}
repl_lst.append(global_wildcard == rest);
return true;
return inherited::match(pattern, repl_lst);
}
-ex expairseq::subs(const lst &ls, const lst &lr, bool no_pattern) const
+ex expairseq::subs(const exmap & m, unsigned options) const
{
- epvector *vp = subschildren(ls, lr, no_pattern);
+ epvector *vp = subschildren(m, options);
if (vp)
- return thisexpairseq(vp, overall_coeff).bp->basic::subs(ls, lr, no_pattern);
+ return ex_to<basic>(thisexpairseq(vp, overall_coeff));
+ else if ((options & subs_options::algebraic) && is_exactly_a<mul>(*this))
+ return static_cast<const mul *>(this)->algebraic_subs_mul(m, options);
else
- return basic::subs(ls, lr, no_pattern);
+ return subs_one_level(m, options);
}
// protected
-/** Implementation of ex::diff() for an expairseq.
- * It differentiates all elements of the sequence.
- * @see ex::diff */
-ex expairseq::derivative(const symbol &s) const
-{
- return thisexpairseq(diffchildren(s),overall_coeff);
-}
-
int expairseq::compare_same_type(const basic &other) const
{
- GINAC_ASSERT(is_of_type(other, expairseq));
- const expairseq &o = static_cast<const expairseq &>(const_cast<basic &>(other));
+ GINAC_ASSERT(is_a<expairseq>(other));
+ const expairseq &o = static_cast<const expairseq &>(other);
int cmpval;
bool expairseq::is_equal_same_type(const basic &other) const
{
- const expairseq &o = dynamic_cast<const expairseq &>(const_cast<basic &>(other));
+ const expairseq &o = static_cast<const expairseq &>(other);
// compare number of elements
if (seq.size()!=o.seq.size())
#endif // EXPAIRSEQ_USE_HASHTAB
}
-unsigned expairseq::return_type(void) const
+unsigned expairseq::return_type() const
{
return return_types::noncommutative_composite;
}
-unsigned expairseq::calchash(void) const
+unsigned expairseq::calchash() const
{
- unsigned v = golden_ratio_hash(tinfo());
- for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) {
+ unsigned v = golden_ratio_hash(this->tinfo());
+ epvector::const_iterator i = seq.begin();
+ const epvector::const_iterator end = seq.end();
+ while (i != end) {
+ v ^= i->rest.gethash();
#if !EXPAIRSEQ_USE_HASHTAB
- v = rotate_left_31(v); // rotation would spoil commutativity
-#endif // EXPAIRSEQ_USE_HASHTAB
- v ^= cit->rest.gethash();
-#if !EXPAIRSEQ_USE_HASHTAB
- v = rotate_left_31(v);
- v ^= cit->coeff.gethash();
-#endif // EXPAIRSEQ_USE_HASHTAB
+ // rotation spoils commutativity!
+ v = rotate_left(v);
+ v ^= i->coeff.gethash();
+#endif // !EXPAIRSEQ_USE_HASHTAB
+ ++i;
}
-
+
v ^= overall_coeff.gethash();
- v &= 0x7FFFFFFFU;
-
+
// store calculated hash value only if object is already evaluated
if (flags &status_flags::evaluated) {
setflag(status_flags::hash_calculated);
ex expairseq::expand(unsigned options) const
{
epvector *vp = expandchildren(options);
- if (vp==0) {
- // the terms have not changed, so it is safe to declare this expanded
- setflag(status_flags::expanded);
- return *this;
- }
-
- return thisexpairseq(vp,overall_coeff);
+ if (vp == NULL) {
+ // The terms have not changed, so it is safe to declare this expanded
+ return (options == 0) ? setflag(status_flags::expanded) : *this;
+ } else
+ return thisexpairseq(vp, overall_coeff);
}
//////////
void expairseq::printpair(const print_context & c, const expair & p, unsigned upper_precedence) const
{
c.s << "[[";
- p.rest.bp->print(c, precedence());
+ p.rest.print(c, precedence());
c.s << ",";
- p.coeff.bp->print(c, precedence());
+ p.coeff.print(c, precedence());
c.s << "]]";
}
* @see expairseq::recombine_pair_to_ex() */
expair expairseq::split_ex_to_pair(const ex &e) const
{
- return expair(e,_ex1());
+ return expair(e,_ex1);
}
expair expairseq::combine_ex_with_coeff_to_pair(const ex &e,
const ex &c) const
{
- GINAC_ASSERT(is_ex_exactly_of_type(c,numeric));
+ GINAC_ASSERT(is_exactly_a<numeric>(c));
return expair(e,c);
}
expair expairseq::combine_pair_with_coeff_to_pair(const expair &p,
const ex &c) const
{
- GINAC_ASSERT(is_ex_exactly_of_type(p.coeff,numeric));
- GINAC_ASSERT(is_ex_exactly_of_type(c,numeric));
+ GINAC_ASSERT(is_exactly_a<numeric>(p.coeff));
+ GINAC_ASSERT(is_exactly_a<numeric>(c));
- return expair(p.rest,ex_to_numeric(p.coeff).mul_dyn(ex_to_numeric(c)));
+ return expair(p.rest,ex_to<numeric>(p.coeff).mul_dyn(ex_to<numeric>(c)));
}
return false;
}
-ex expairseq::default_overall_coeff(void) const
+ex expairseq::default_overall_coeff() const
{
- return _ex0();
+ return _ex0;
}
void expairseq::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).add_dyn(ex_to_numeric(c));
+ GINAC_ASSERT(is_exactly_a<numeric>(overall_coeff));
+ GINAC_ASSERT(is_exactly_a<numeric>(c));
+ overall_coeff = ex_to<numeric>(overall_coeff).add_dyn(ex_to<numeric>(c));
}
void expairseq::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));
- GINAC_ASSERT(is_ex_exactly_of_type(c2,numeric));
- overall_coeff = ex_to_numeric(overall_coeff).
- add_dyn(ex_to_numeric(c1).mul(ex_to_numeric(c2)));
+ GINAC_ASSERT(is_exactly_a<numeric>(overall_coeff));
+ GINAC_ASSERT(is_exactly_a<numeric>(c1));
+ GINAC_ASSERT(is_exactly_a<numeric>(c2));
+ overall_coeff = ex_to<numeric>(overall_coeff).
+ add_dyn(ex_to<numeric>(c1).mul(ex_to<numeric>(c2)));
}
bool expairseq::can_make_flat(const expair &p) const
void expairseq::construct_from_2_ex(const ex &lh, const ex &rh)
{
- if (lh.bp->tinfo()==tinfo()) {
- if (rh.bp->tinfo()==tinfo()) {
+ if (ex_to<basic>(lh).tinfo()==this->tinfo()) {
+ if (ex_to<basic>(rh).tinfo()==this->tinfo()) {
#if EXPAIRSEQ_USE_HASHTAB
- unsigned totalsize = ex_to_expairseq(lh).seq.size() +
- ex_to_expairseq(rh).seq.size();
+ unsigned totalsize = ex_to<expairseq>(lh).seq.size() +
+ ex_to<expairseq>(rh).seq.size();
if (calc_hashtabsize(totalsize)!=0) {
construct_from_2_ex_via_exvector(lh,rh);
} else {
#endif // EXPAIRSEQ_USE_HASHTAB
- construct_from_2_expairseq(ex_to_expairseq(lh),
- ex_to_expairseq(rh));
+ construct_from_2_expairseq(ex_to<expairseq>(lh),
+ ex_to<expairseq>(rh));
#if EXPAIRSEQ_USE_HASHTAB
}
#endif // EXPAIRSEQ_USE_HASHTAB
return;
} else {
#if EXPAIRSEQ_USE_HASHTAB
- unsigned totalsize = ex_to_expairseq(lh).seq.size()+1;
+ unsigned totalsize = ex_to<expairseq>(lh).seq.size()+1;
if (calc_hashtabsize(totalsize)!=0) {
construct_from_2_ex_via_exvector(lh, rh);
} else {
#endif // EXPAIRSEQ_USE_HASHTAB
- construct_from_expairseq_ex(ex_to_expairseq(lh), rh);
+ construct_from_expairseq_ex(ex_to<expairseq>(lh), rh);
#if EXPAIRSEQ_USE_HASHTAB
}
#endif // EXPAIRSEQ_USE_HASHTAB
return;
}
- } else if (rh.bp->tinfo()==tinfo()) {
+ } else if (ex_to<basic>(rh).tinfo()==this->tinfo()) {
#if EXPAIRSEQ_USE_HASHTAB
- unsigned totalsize=ex_to_expairseq(rh).seq.size()+1;
+ unsigned totalsize=ex_to<expairseq>(rh).seq.size()+1;
if (calc_hashtabsize(totalsize)!=0) {
construct_from_2_ex_via_exvector(lh,rh);
} else {
#endif // EXPAIRSEQ_USE_HASHTAB
- construct_from_expairseq_ex(ex_to_expairseq(rh),lh);
+ construct_from_expairseq_ex(ex_to<expairseq>(rh),lh);
#if EXPAIRSEQ_USE_HASHTAB
}
#endif // EXPAIRSEQ_USE_HASHTAB
hashtabsize = 0;
#endif // EXPAIRSEQ_USE_HASHTAB
- if (is_ex_exactly_of_type(lh,numeric)) {
- if (is_ex_exactly_of_type(rh,numeric)) {
+ if (is_exactly_a<numeric>(lh)) {
+ if (is_exactly_a<numeric>(rh)) {
combine_overall_coeff(lh);
combine_overall_coeff(rh);
} else {
seq.push_back(split_ex_to_pair(rh));
}
} else {
- if (is_ex_exactly_of_type(rh,numeric)) {
+ if (is_exactly_a<numeric>(rh)) {
combine_overall_coeff(rh);
seq.push_back(split_ex_to_pair(lh));
} else {
int cmpval = p1.rest.compare(p2.rest);
if (cmpval==0) {
- p1.coeff=ex_to_numeric(p1.coeff).add_dyn(ex_to_numeric(p2.coeff));
- if (!ex_to_numeric(p1.coeff).is_zero()) {
+ p1.coeff = ex_to<numeric>(p1.coeff).add_dyn(ex_to<numeric>(p2.coeff));
+ if (!ex_to<numeric>(p1.coeff).is_zero()) {
// no further processing is necessary, since this
// one element will usually be recombined in eval()
seq.push_back(p1);
int cmpval = (*first1).rest.compare((*first2).rest);
if (cmpval==0) {
// combine terms
- const numeric &newcoeff = ex_to_numeric((*first1).coeff).
- add(ex_to_numeric((*first2).coeff));
+ const numeric &newcoeff = ex_to<numeric>(first1->coeff).
+ add(ex_to<numeric>(first2->coeff));
if (!newcoeff.is_zero()) {
- seq.push_back(expair((*first1).rest,newcoeff));
+ seq.push_back(expair(first1->rest,newcoeff));
if (expair_needs_further_processing(seq.end()-1)) {
needs_further_processing = true;
}
const ex &e)
{
combine_overall_coeff(s.overall_coeff);
- if (is_ex_exactly_of_type(e,numeric)) {
+ if (is_exactly_a<numeric>(e)) {
combine_overall_coeff(e);
seq = s.seq;
return;
// merge p into s.seq
while (first!=last) {
- int cmpval=(*first).rest.compare(p.rest);
+ int cmpval = (*first).rest.compare(p.rest);
if (cmpval==0) {
// combine terms
- const numeric &newcoeff = ex_to_numeric((*first).coeff).
- add(ex_to_numeric(p.coeff));
+ const numeric &newcoeff = ex_to<numeric>(first->coeff).
+ add(ex_to<numeric>(p.coeff));
if (!newcoeff.is_zero()) {
- seq.push_back(expair((*first).rest,newcoeff));
- if (expair_needs_further_processing(seq.end()-1)) {
+ seq.push_back(expair(first->rest,newcoeff));
+ if (expair_needs_further_processing(seq.end()-1))
needs_further_processing = true;
- }
}
++first;
p_pushed = true;
canonicalize();
combine_same_terms_sorted_seq();
#endif // EXPAIRSEQ_USE_HASHTAB
- return;
}
void expairseq::construct_from_epvector(const epvector &v)
canonicalize();
combine_same_terms_sorted_seq();
#endif // EXPAIRSEQ_USE_HASHTAB
- return;
}
/** Combine this expairseq with argument exvector.
cit = v.begin();
while (cit!=v.end()) {
- if (cit->bp->tinfo()==this->tinfo()) {
+ if (ex_to<basic>(*cit).tinfo()==this->tinfo()) {
++nexpairseqs;
- noperands += ex_to_expairseq(*cit).seq.size();
+ noperands += ex_to<expairseq>(*cit).seq.size();
}
++cit;
}
// copy elements and split off numerical part
cit = v.begin();
while (cit!=v.end()) {
- if (cit->bp->tinfo()==this->tinfo()) {
- const expairseq &subseqref = ex_to_expairseq(*cit);
+ if (ex_to<basic>(*cit).tinfo()==this->tinfo()) {
+ const expairseq &subseqref = ex_to<expairseq>(*cit);
combine_overall_coeff(subseqref.overall_coeff);
epvector::const_iterator cit_s = subseqref.seq.begin();
while (cit_s!=subseqref.seq.end()) {
++cit_s;
}
} else {
- if (is_ex_exactly_of_type(*cit,numeric))
+ if (is_exactly_a<numeric>(*cit))
combine_overall_coeff(*cit);
else
seq.push_back(split_ex_to_pair(*cit));
}
++cit;
}
-
- return;
}
/** Combine this expairseq with argument epvector.
cit = v.begin();
while (cit!=v.end()) {
- if (cit->rest.bp->tinfo()==this->tinfo()) {
+ if (ex_to<basic>(cit->rest).tinfo()==this->tinfo()) {
++nexpairseqs;
- noperands += ex_to_expairseq((*cit).rest).seq.size();
+ noperands += ex_to<expairseq>(cit->rest).seq.size();
}
++cit;
}
// copy elements and split off numerical part
cit = v.begin();
while (cit!=v.end()) {
- if (cit->rest.bp->tinfo()==this->tinfo() &&
+ if (ex_to<basic>(cit->rest).tinfo()==this->tinfo() &&
this->can_make_flat(*cit)) {
- const expairseq &subseqref = ex_to_expairseq((*cit).rest);
- combine_overall_coeff(ex_to_numeric(subseqref.overall_coeff),
- ex_to_numeric((*cit).coeff));
+ const expairseq &subseqref = ex_to<expairseq>(cit->rest);
+ combine_overall_coeff(ex_to<numeric>(subseqref.overall_coeff),
+ ex_to<numeric>(cit->coeff));
epvector::const_iterator cit_s = subseqref.seq.begin();
while (cit_s!=subseqref.seq.end()) {
- seq.push_back(expair((*cit_s).rest,
- ex_to_numeric((*cit_s).coeff).mul_dyn(ex_to_numeric((*cit).coeff))));
+ seq.push_back(expair(cit_s->rest,
+ ex_to<numeric>(cit_s->coeff).mul_dyn(ex_to<numeric>(cit->coeff))));
//seq.push_back(combine_pair_with_coeff_to_pair(*cit_s,
// (*cit).coeff));
++cit_s;
}
++cit;
}
- return;
}
/** Brings this expairseq into a sorted (canonical) form. */
-void expairseq::canonicalize(void)
+void expairseq::canonicalize()
{
- // canonicalize
- sort(seq.begin(),seq.end(),expair_is_less());
- return;
+ std::sort(seq.begin(), seq.end(), expair_rest_is_less());
}
/** Compact a presorted expairseq by combining all matching expairs to one
* each. On an add object, this is responsible for 2*x+3*x+y -> 5*x+y, for
* instance. */
-void expairseq::combine_same_terms_sorted_seq(void)
+void expairseq::combine_same_terms_sorted_seq()
{
+ if (seq.size()<2)
+ return;
+
bool needs_further_processing = false;
-
- if (seq.size()>1) {
- epvector::iterator itin1 = seq.begin();
- epvector::iterator itin2 = itin1+1;
- epvector::iterator itout = itin1;
- epvector::iterator last = seq.end();
- // must_copy will be set to true the first time some combination is
- // possible from then on the sequence has changed and must be compacted
- bool must_copy = false;
- while (itin2!=last) {
- if ((*itin1).rest.compare((*itin2).rest)==0) {
- (*itin1).coeff = ex_to_numeric((*itin1).coeff).
- add_dyn(ex_to_numeric((*itin2).coeff));
- if (expair_needs_further_processing(itin1))
- needs_further_processing = true;
- must_copy = true;
- } else {
- if (!ex_to_numeric((*itin1).coeff).is_zero()) {
- if (must_copy)
- *itout = *itin1;
- ++itout;
- }
- itin1 = itin2;
+
+ epvector::iterator itin1 = seq.begin();
+ epvector::iterator itin2 = itin1+1;
+ epvector::iterator itout = itin1;
+ epvector::iterator last = seq.end();
+ // must_copy will be set to true the first time some combination is
+ // possible from then on the sequence has changed and must be compacted
+ bool must_copy = false;
+ while (itin2!=last) {
+ if (itin1->rest.compare(itin2->rest)==0) {
+ itin1->coeff = ex_to<numeric>(itin1->coeff).
+ add_dyn(ex_to<numeric>(itin2->coeff));
+ if (expair_needs_further_processing(itin1))
+ needs_further_processing = true;
+ must_copy = true;
+ } else {
+ if (!ex_to<numeric>(itin1->coeff).is_zero()) {
+ if (must_copy)
+ *itout = *itin1;
+ ++itout;
}
- ++itin2;
- }
- if (!ex_to_numeric((*itin1).coeff).is_zero()) {
- if (must_copy)
- *itout = *itin1;
- ++itout;
+ itin1 = itin2;
}
- if (itout!=last)
- seq.erase(itout,last);
+ ++itin2;
}
-
+ if (!ex_to<numeric>(itin1->coeff).is_zero()) {
+ if (must_copy)
+ *itout = *itin1;
+ ++itout;
+ }
+ if (itout!=last)
+ seq.erase(itout,last);
+
if (needs_further_processing) {
epvector v = seq;
seq.clear();
construct_from_epvector(v);
}
- return;
}
#if EXPAIRSEQ_USE_HASHTAB
size = nearest_power_of_2/hashtabfactor;
if (size<minhashtabsize)
return 0;
- GINAC_ASSERT(hashtabsize<=0x8000000U); // really max size due to 31 bit hashing
+
// hashtabsize must be a power of 2
GINAC_ASSERT((1U << log2(size))==size);
return size;
unsigned expairseq::calc_hashindex(const ex &e) const
{
// calculate hashindex
- unsigned hash = e.gethash();
unsigned hashindex;
- if (is_a_numeric_hash(hash)) {
+ if (is_a<numeric>(e)) {
hashindex = hashmask;
} else {
- hashindex = hash &hashmask;
+ hashindex = e.gethash() & hashmask;
// last hashtab entry is reserved for numerics
if (hashindex==hashmask) hashindex = 0;
}
- GINAC_ASSERT(hashindex>=0);
GINAC_ASSERT((hashindex<hashtabsize)||(hashtabsize==0));
return hashindex;
}
-void expairseq::shrink_hashtab(void)
+void expairseq::shrink_hashtab()
{
unsigned new_hashtabsize;
while (hashtabsize!=(new_hashtabsize=calc_hashtabsize(seq.size()))) {
++epplit;
}
if (!erased) {
- printtree(cout,0);
- cout << "tried to erase " << element-seq.begin() << std::endl;
- cout << "size " << seq.end()-seq.begin() << std::endl;
+ std::cout << "tried to erase " << element-seq.begin() << std::endl;
+ std::cout << "size " << seq.end()-seq.begin() << std::endl;
- unsigned hashindex = calc_hashindex((*element).rest);
+ unsigned hashindex = calc_hashindex(element->rest);
epplist &eppl = hashtab[hashindex];
- epplist::iterator epplit=eppl.begin();
- bool erased=false;
+ epplist::iterator epplit = eppl.begin();
+ bool erased = false;
while (epplit!=eppl.end()) {
if (*epplit == element) {
eppl.erase(epplit);
GINAC_ASSERT(epplit!=eppl.end());
}
-void expairseq::sorted_insert(epplist &eppl, epp elem)
+void expairseq::sorted_insert(epplist &eppl, epvector::const_iterator elem)
{
- epplist::iterator current = eppl.begin();
- while ((current!=eppl.end())&&((*(*current)).is_less(*elem))) {
+ epplist::const_iterator current = eppl.begin();
+ while ((current!=eppl.end()) && ((*current)->is_less(*elem))) {
++current;
}
eppl.insert(current,elem);
std::vector<bool> &touched,
unsigned &number_of_zeroes)
{
- epp current=seq.begin();
+ epp current = seq.begin();
while (current!=first_numeric) {
- if (is_ex_exactly_of_type((*current).rest,numeric)) {
+ if (is_exactly_a<numeric>(current->rest)) {
--first_numeric;
iter_swap(current,first_numeric);
} else {
// calculate hashindex
- unsigned currenthashindex = calc_hashindex((*current).rest);
+ unsigned currenthashindex = calc_hashindex(current->rest);
// test if there is already a matching expair in the hashtab-list
epplist &eppl=hashtab[currenthashindex];
epplist::iterator epplit = eppl.begin();
while (epplit!=eppl.end()) {
- if ((*current).rest.is_equal((*(*epplit)).rest))
+ if (current->rest.is_equal((*epplit)->rest))
break;
++epplit;
}
++current;
} else {
// epplit points to a matching expair, combine it with current
- (*(*epplit)).coeff = ex_to_numeric((*(*epplit)).coeff).
- add_dyn(ex_to_numeric((*current).coeff));
+ (*epplit)->coeff = ex_to<numeric>((*epplit)->coeff).
+ add_dyn(ex_to<numeric>(current->coeff));
// move obsolete current expair to end by swapping with last_non_zero element
// if this was a numeric, it is swapped with the expair before first_numeric
--last_non_zero;
++number_of_zeroes;
// test if combined term has coeff 0 and can be removed is done later
- touched[(*epplit)-seq.begin()]=true;
+ touched[(*epplit)-seq.begin()] = true;
}
}
}
// move terms with coeff 0 to end and remove them from hashtab
// check only those elements which have been touched
epp current = seq.begin();
- unsigned i = 0;
+ size_t i = 0;
while (current!=first_numeric) {
if (!touched[i]) {
++current;
++i;
- } else if (!ex_to_numeric((*current).coeff).is_zero()) {
+ } else if (!ex_to<numeric>((*current).coeff).is_zero()) {
++current;
++i;
} else {
if (current!=last_non_zero) {
iter_swap(current,last_non_zero);
--first_numeric;
- bool numeric_swapped=first_numeric!=last_non_zero;
- if (numeric_swapped) iter_swap(first_numeric,current);
+ bool numeric_swapped = first_numeric!=last_non_zero;
+ if (numeric_swapped)
+ iter_swap(first_numeric,current);
epvector::iterator changed_entry;
if (numeric_swapped)
/** True if one of the coeffs vanishes, otherwise false.
* This would be an invariant violation, so this should only be used for
* debugging purposes. */
-bool expairseq::has_coeff_0(void) const
+bool expairseq::has_coeff_0() const
{
- for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) {
- if ((*cit).coeff.is_zero())
+ epvector::const_iterator i = seq.begin(), end = seq.end();
+ while (i != end) {
+ if (i->coeff.is_zero())
return true;
+ ++i;
}
return false;
}
void expairseq::add_numerics_to_hashtab(epvector::iterator first_numeric,
epvector::const_iterator last_non_zero)
{
- if (first_numeric==seq.end()) return; // no numerics
+ if (first_numeric == seq.end()) return; // no numerics
- epvector::iterator current = first_numeric;
- epvector::const_iterator last = last_non_zero+1;
- while (current!=last) {
- sorted_insert(hashtab[hashmask],current);
+ epvector::const_iterator current = first_numeric, last = last_non_zero + 1;
+ while (current != last) {
+ sorted_insert(hashtab[hashmask], current);
++current;
}
}
-void expairseq::combine_same_terms(void)
+void expairseq::combine_same_terms()
{
// combine same terms, drop term with coeff 0, move numerics to end
epvector::iterator first_numeric = seq.end();
epvector::iterator last_non_zero = seq.end()-1;
- std::vector<bool> touched;
- touched.reserve(seq.size());
- for (unsigned i=0; i<seq.size(); ++i) touched[i]=false;
+ size_t num = seq.size();
+ std::vector<bool> touched(num);
unsigned number_of_zeroes = 0;
GINAC_ASSERT(!has_coeff_0());
build_hashtab_and_combine(first_numeric,last_non_zero,touched,number_of_zeroes);
- /*
- cout << "in combine:" << std::endl;
- printtree(cout,0);
- cout << "size=" << seq.end() - seq.begin() << std::endl;
- cout << "first_numeric=" << first_numeric - seq.begin() << std::endl;
- cout << "last_non_zero=" << last_non_zero - seq.begin() << std::endl;
- for (unsigned i=0; i<seq.size(); ++i) {
- if (touched[i]) cout << i << " is touched" << std::endl;
- }
- cout << "end in combine" << std::endl;
- */
// there should not be any terms with coeff 0 from the beginning,
// so it should be safe to skip this step
if (number_of_zeroes!=0) {
drop_coeff_0_terms(first_numeric,last_non_zero,touched,number_of_zeroes);
- /*
- cout << "in combine after drop:" << std::endl;
- printtree(cout,0);
- cout << "size=" << seq.end() - seq.begin() << std::endl;
- cout << "first_numeric=" << first_numeric - seq.begin() << std::endl;
- cout << "last_non_zero=" << last_non_zero - seq.begin() << std::endl;
- for (unsigned i=0; i<seq.size(); ++i) {
- if (touched[i]) cout << i << " is touched" << std::endl;
- }
- cout << "end in combine after drop" << std::endl;
- */
}
add_numerics_to_hashtab(first_numeric,last_non_zero);
if (hashtabsize > 0) return 1; // not canoncalized
#endif // EXPAIRSEQ_USE_HASHTAB
- epvector::const_iterator it = seq.begin();
+ epvector::const_iterator it = seq.begin(), itend = seq.end();
epvector::const_iterator it_last = it;
- for (++it; it!=seq.end(); it_last=it, ++it) {
- if (!((*it_last).is_less(*it) || (*it_last).is_equal(*it))) {
- if (!is_ex_exactly_of_type((*it_last).rest,numeric) ||
- !is_ex_exactly_of_type((*it).rest,numeric)) {
+ for (++it; it!=itend; it_last=it, ++it) {
+ if (!(it_last->is_less(*it) || it_last->is_equal(*it))) {
+ if (!is_exactly_a<numeric>(it_last->rest) ||
+ !is_exactly_a<numeric>(it->rest)) {
// double test makes it easier to set a breakpoint...
- if (!is_ex_exactly_of_type((*it_last).rest,numeric) ||
- !is_ex_exactly_of_type((*it).rest,numeric)) {
+ if (!is_exactly_a<numeric>(it_last->rest) ||
+ !is_exactly_a<numeric>(it->rest)) {
printpair(std::clog, *it_last, 0);
std::clog << ">";
printpair(std::clog, *it, 0);
std::clog << "\n";
std::clog << "pair1:" << std::endl;
- (*it_last).rest.print(print_tree(std::clog));
- (*it_last).coeff.print(print_tree(std::clog));
+ it_last->rest.print(print_tree(std::clog));
+ it_last->coeff.print(print_tree(std::clog));
std::clog << "pair2:" << std::endl;
- (*it).rest.print(print_tree(std::clog));
- (*it).coeff.print(print_tree(std::clog));
+ it->rest.print(print_tree(std::clog));
+ it->coeff.print(print_tree(std::clog));
return 0;
}
}
* if no members were changed. */
epvector * expairseq::expandchildren(unsigned options) const
{
- epvector::const_iterator last = seq.end();
+ const epvector::const_iterator last = seq.end();
epvector::const_iterator cit = seq.begin();
while (cit!=last) {
- const ex &expanded_ex = (*cit).rest.expand(options);
- if (!are_ex_trivially_equal((*cit).rest,expanded_ex)) {
+ const ex &expanded_ex = cit->rest.expand(options);
+ if (!are_ex_trivially_equal(cit->rest,expanded_ex)) {
// something changed, copy seq, eval and return it
epvector *s = new epvector;
}
// copy first changed element
s->push_back(combine_ex_with_coeff_to_pair(expanded_ex,
- (*cit2).coeff));
+ cit2->coeff));
++cit2;
// copy rest
while (cit2!=last) {
- s->push_back(combine_ex_with_coeff_to_pair((*cit2).rest.expand(options),
- (*cit2).coeff));
+ s->push_back(combine_ex_with_coeff_to_pair(cit2->rest.expand(options),
+ cit2->coeff));
++cit2;
}
return s;
throw(std::runtime_error("max recursion level reached"));
--level;
- epvector::const_iterator last=seq.end();
- epvector::const_iterator cit=seq.begin();
+ epvector::const_iterator last = seq.end();
+ epvector::const_iterator cit = seq.begin();
while (cit!=last) {
- const ex &evaled_ex = (*cit).rest.eval(level);
- if (!are_ex_trivially_equal((*cit).rest,evaled_ex)) {
+ const ex &evaled_ex = cit->rest.eval(level);
+ if (!are_ex_trivially_equal(cit->rest,evaled_ex)) {
// something changed, copy seq, eval and return it
epvector *s = new epvector;
}
// copy first changed element
s->push_back(combine_ex_with_coeff_to_pair(evaled_ex,
- (*cit2).coeff));
+ cit2->coeff));
++cit2;
// copy rest
while (cit2!=last) {
- s->push_back(combine_ex_with_coeff_to_pair((*cit2).rest.eval(level),
- (*cit2).coeff));
+ s->push_back(combine_ex_with_coeff_to_pair(cit2->rest.eval(level),
+ cit2->coeff));
++cit2;
}
return s;
}
-/** Member-wise evaluate numerically all expairs in this sequence.
- *
- * @see expairseq::evalf()
- * @return epvector with all entries evaluated numerically. */
-epvector expairseq::evalfchildren(int level) const
-{
- if (level==1)
- return seq;
-
- if (level==-max_recursion_level)
- throw(std::runtime_error("max recursion level reached"));
-
- epvector s;
- s.reserve(seq.size());
-
- --level;
- for (epvector::const_iterator it=seq.begin(); it!=seq.end(); ++it) {
- s.push_back(combine_ex_with_coeff_to_pair((*it).rest.evalf(level),
- (*it).coeff.evalf(level)));
- }
- return s;
-}
-
-
-/** Member-wise normalize all expairs in this sequence.
- *
- * @see expairseq::normal()
- * @return epvector with all entries normalized. */
-epvector expairseq::normalchildren(int level) const
-{
- if (level==1)
- return seq;
-
- if (level==-max_recursion_level)
- throw(std::runtime_error("max recursion level reached"));
-
- epvector s;
- s.reserve(seq.size());
-
- --level;
- for (epvector::const_iterator it=seq.begin(); it!=seq.end(); ++it) {
- s.push_back(combine_ex_with_coeff_to_pair((*it).rest.normal(level),
- (*it).coeff));
- }
- return s;
-}
-
-
-/** Member-wise differentiate all expairs in this sequence.
- *
- * @see expairseq::diff()
- * @return epvector with all entries differentiated. */
-epvector expairseq::diffchildren(const symbol &y) const
-{
- epvector s;
- s.reserve(seq.size());
-
- for (epvector::const_iterator it=seq.begin(); it!=seq.end(); ++it) {
- s.push_back(combine_ex_with_coeff_to_pair((*it).rest.diff(y),
- (*it).coeff));
- }
- return s;
-}
-
-
/** Member-wise substitute in this sequence.
*
* @see expairseq::subs()
* @return pointer to epvector containing pairs after application of subs,
* or NULL pointer if no members were changed. */
-epvector * expairseq::subschildren(const lst &ls, const lst &lr, bool no_pattern) const
+epvector * expairseq::subschildren(const exmap & m, unsigned options) const
{
- GINAC_ASSERT(ls.nops()==lr.nops());
-
- // The substitution is "complex" when any of the objects to be substituted
- // is a product or power. In this case we have to recombine the pairs
- // because the numeric coefficients may be part of the search pattern.
- bool complex_subs = false;
- for (unsigned i=0; i<ls.nops(); i++)
- if (is_ex_exactly_of_type(ls.op(i), mul) || is_ex_exactly_of_type(ls.op(i), power)) {
- complex_subs = true;
- break;
+ // When any of the objects to be substituted is a product or power
+ // we have to recombine the pairs because the numeric coefficients may
+ // be part of the search pattern.
+ if (!(options & (subs_options::pattern_is_product | subs_options::pattern_is_not_product))) {
+
+ // Search the list of substitutions and cache our findings
+ for (exmap::const_iterator it = m.begin(); it != m.end(); ++it) {
+ if (is_exactly_a<mul>(it->first) || is_exactly_a<power>(it->first)) {
+ options |= subs_options::pattern_is_product;
+ break;
+ }
}
+ if (!(options & subs_options::pattern_is_product))
+ options |= subs_options::pattern_is_not_product;
+ }
- if (complex_subs) {
+ if (options & subs_options::pattern_is_product) {
// Substitute in the recombined pairs
epvector::const_iterator cit = seq.begin(), last = seq.end();
while (cit != last) {
const ex &orig_ex = recombine_pair_to_ex(*cit);
- const ex &subsed_ex = orig_ex.subs(ls, lr, no_pattern);
+ const ex &subsed_ex = orig_ex.subs(m, options);
if (!are_ex_trivially_equal(orig_ex, subsed_ex)) {
// Something changed, copy seq, subs and return it
// Copy rest
while (cit != last) {
- s->push_back(split_ex_to_pair(recombine_pair_to_ex(*cit).subs(ls, lr, no_pattern)));
+ s->push_back(split_ex_to_pair(recombine_pair_to_ex(*cit).subs(m, options)));
++cit;
}
return s;
epvector::const_iterator cit = seq.begin(), last = seq.end();
while (cit != last) {
- const ex &subsed_ex = cit->rest.subs(ls, lr, no_pattern);
+ const ex &subsed_ex = cit->rest.subs(m, options);
if (!are_ex_trivially_equal(cit->rest, subsed_ex)) {
// Something changed, copy seq, subs and return it
// Copy rest
while (cit != last) {
- s->push_back(combine_ex_with_coeff_to_pair(cit->rest.subs(ls, lr, no_pattern),
+ s->push_back(combine_ex_with_coeff_to_pair(cit->rest.subs(m, options),
cit->coeff));
++cit;
}
git://www.ginac.de / ginac.git / blobdiff