X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fadd.cpp;h=717279b57ef65803e76debd4d54be80f7fe4e02a;hp=d376b5d1983937df7a2236142909673ec225164d;hb=f6f99c4d47762da9e3d73a2f5ec6f062e82505b8;hpb=4afb5bbe2c0b0a60928120a042997ba7d89e8f5c

diff --git a/ginac/add.cpp b/ginac/add.cpp
index d376b5d1..717279b5 100644
--- a/ginac/add.cpp
+++ b/ginac/add.cpp
@@ -3,7 +3,7 @@
  *  Implementation of GiNaC's sums 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
@@ -25,12 +25,15 @@
 
 #include "add.h"
 #include "mul.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(add, expairseq)
 
 //////////
 // default constructor, destructor, copy constructor assignment operator and helpers
@@ -50,13 +53,13 @@ add::~add()
     destroy(0);
 }
 
-add::add(add const & other)
+add::add(const add & other)
 {
     debugmsg("add copy constructor",LOGLEVEL_CONSTRUCT);
     copy(other);
 }
 
-add const & add::operator=(add const & other)
+const add & add::operator=(const add & other)
 {
     debugmsg("add operator=",LOGLEVEL_ASSIGNMENT);
     if (this != &other) {
@@ -68,14 +71,14 @@ add const & add::operator=(add const & other)
 
 // protected
 
-void add::copy(add const & other)
+void add::copy(const add & other)
 {
-    expairseq::copy(other);
+    inherited::copy(other);
 }
 
 void add::destroy(bool call_parent)
 {
-    if (call_parent) expairseq::destroy(call_parent);
+    if (call_parent) inherited::destroy(call_parent);
 }
 
 //////////
@@ -84,26 +87,26 @@ void add::destroy(bool call_parent)
 
 // public
 
-add::add(ex const & lh, ex const & rh)
+add::add(const ex & lh, const ex & rh)
 {
     debugmsg("add constructor from ex,ex",LOGLEVEL_CONSTRUCT);
     tinfo_key = TINFO_add;
-    overall_coeff=_ex0();
+    overall_coeff = _ex0();
     construct_from_2_ex(lh,rh);
     GINAC_ASSERT(is_canonical());
 }
 
-add::add(exvector const & v)
+add::add(const exvector & v)
 {
     debugmsg("add constructor from exvector",LOGLEVEL_CONSTRUCT);
     tinfo_key = TINFO_add;
-    overall_coeff=_ex0();
+    overall_coeff = _ex0();
     construct_from_exvector(v);
     GINAC_ASSERT(is_canonical());
 }
 
 /*
-add::add(epvector const & v, bool do_not_canonicalize)
+add::add(const epvector & v, bool do_not_canonicalize)
 {
     debugmsg("add constructor from epvector,bool",LOGLEVEL_CONSTRUCT);
     tinfo_key = TINFO_add;
@@ -119,35 +122,57 @@ add::add(epvector const & v, bool do_not_canonicalize)
 }
 */
 
-add::add(epvector const & v)
+add::add(const epvector & v)
 {
     debugmsg("add constructor from epvector",LOGLEVEL_CONSTRUCT);
     tinfo_key = TINFO_add;
-    overall_coeff=_ex0();
+    overall_coeff = _ex0();
     construct_from_epvector(v);
     GINAC_ASSERT(is_canonical());
 }
 
-add::add(epvector const & v, ex const & oc)
+add::add(const epvector & v, const ex & oc)
 {
     debugmsg("add constructor from epvector,ex",LOGLEVEL_CONSTRUCT);
     tinfo_key = TINFO_add;
-    overall_coeff=oc;
+    overall_coeff = oc;
     construct_from_epvector(v);
     GINAC_ASSERT(is_canonical());
 }
 
-add::add(epvector * vp, ex const & oc)
+add::add(epvector * vp, const ex & oc)
 {
     debugmsg("add constructor from epvector *,ex",LOGLEVEL_CONSTRUCT);
     tinfo_key = TINFO_add;
     GINAC_ASSERT(vp!=0);
-    overall_coeff=oc;
+    overall_coeff = oc;
     construct_from_epvector(*vp);
     delete vp;
     GINAC_ASSERT(is_canonical());
 }
 
+//////////
+// archiving
+//////////
+
+/** Construct object from archive_node. */
+add::add(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
+{
+    debugmsg("add constructor from archive_node", LOGLEVEL_CONSTRUCT);
+}
+
+/** Unarchive the object. */
+ex add::unarchive(const archive_node &n, const lst &sym_lst)
+{
+    return (new add(n, sym_lst))->setflag(status_flags::dynallocated);
+}
+
+/** Archive the object. */
+void add::archive(archive_node &n) const
+{
+    inherited::archive(n);
+}
+
 //////////
 // functions overriding virtual functions from bases classes
 //////////
@@ -160,45 +185,6 @@ basic * add::duplicate() const
     return new add(*this);
 }
 
-/*void add::print(ostream & os, unsigned upper_precedence) const
-{
-    debugmsg("add print",LOGLEVEL_PRINT);
-    if (precedence<=upper_precedence) os << "(";
-    numeric coeff;
-    bool first=true;
-    for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) {
-        coeff = ex_to_numeric(cit->coeff);
-        if (!first) {
-            if (coeff.csgn()==-1) os << '-'; else os << '+';
-        } else {
-            if (coeff.csgn()==-1) os << '-';
-            first=false;
-        }
-        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 << '*';
-        }
-        os << cit->rest;
-    }
-    // print the overall numeric coefficient, if present:
-    if (!overall_coeff.is_zero()) {
-        if (overall_coeff.info(info_flags::positive)) os << '+';
-        os << overall_coeff;
-    }
-    if (precedence<=upper_precedence) os << ")";
-}*/
-
 void add::print(ostream & os, unsigned upper_precedence) const
 {
     debugmsg("add print",LOGLEVEL_PRINT);
@@ -317,15 +303,15 @@ bool add::info(unsigned inf) const
         }
         return overall_coeff.info(inf);
     } else {
-        return expairseq::info(inf);
+        return inherited::info(inf);
     }
 }
 
-int add::degree(symbol const & s) const
+int add::degree(const symbol & s) const
 {
-    int deg=INT_MIN;
+    int deg = INT_MIN;
     if (!overall_coeff.is_equal(_ex0())) {
-        deg=0;
+        deg = 0;
     }
     int cur_deg;
     for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) {
@@ -335,21 +321,21 @@ int add::degree(symbol const & s) const
     return deg;
 }
 
-int add::ldegree(symbol const & s) const
+int add::ldegree(const symbol & s) const
 {
-    int deg=INT_MAX;
+    int deg = INT_MAX;
     if (!overall_coeff.is_equal(_ex0())) {
-        deg=0;
+        deg = 0;
     }
     int cur_deg;
     for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) {
-        cur_deg=(*cit).rest.ldegree(s);
+        cur_deg = (*cit).rest.ldegree(s);
         if (cur_deg<deg) deg=cur_deg;
     }
     return deg;
 }
 
-ex add::coeff(symbol const & s, int const n) const
+ex add::coeff(const symbol & s, int n) const
 {
     epvector coeffseq;
     coeffseq.reserve(seq.size());
@@ -379,7 +365,7 @@ ex add::eval(int level) const
         return (new add(evaled_seqp,overall_coeff))->
                    setflag(status_flags::dynallocated);
     }
-
+    
 #ifdef DO_GINAC_ASSERT
     for (epvector::const_iterator cit=seq.begin(); cit!=seq.end(); ++cit) {
         GINAC_ASSERT(!is_ex_exactly_of_type((*cit).rest,add));
@@ -389,13 +375,13 @@ ex add::eval(int level) const
         GINAC_ASSERT(!is_ex_exactly_of_type((*cit).rest,numeric));
     }
 #endif // def DO_GINAC_ASSERT
-
+    
     if (flags & status_flags::evaluated) {
         GINAC_ASSERT(seq.size()>0);
         GINAC_ASSERT((seq.size()>1)||!overall_coeff.is_equal(_ex0()));
         return *this;
     }
-
+    
     int seq_size=seq.size();
     if (seq_size==0) {
         // +(;c) -> c
@@ -418,24 +404,32 @@ exvector add::get_indices(void) const
     return (seq.begin())->rest.get_indices();
 }    
 
-ex add::simplify_ncmul(exvector const & v) const
+ex add::simplify_ncmul(const exvector & v) const
 {
     if (seq.size()==0) {
-        return expairseq::simplify_ncmul(v);
+        return inherited::simplify_ncmul(v);
     }
     return (*seq.begin()).rest.simplify_ncmul(v);
 }    
 
 // protected
 
-int add::compare_same_type(basic const & other) const
+/** Implementation of ex::diff() for a sum. It differentiates each term.
+ *  @see ex::diff */
+ex add::derivative(const symbol & s) const
 {
-    return expairseq::compare_same_type(other);
+    // D(a+b+c)=D(a)+D(b)+D(c)
+    return (new add(diffchildren(s)))->setflag(status_flags::dynallocated);
 }
 
-bool add::is_equal_same_type(basic const & other) const
+int add::compare_same_type(const basic & other) const
 {
-    return expairseq::is_equal_same_type(other);
+    return inherited::compare_same_type(other);
+}
+
+bool add::is_equal_same_type(const basic & other) const
+{
+    return inherited::is_equal_same_type(other);
 }
 
 unsigned add::return_type(void) const
@@ -454,20 +448,20 @@ unsigned add::return_type_tinfo(void) const
     return (*seq.begin()).rest.return_type_tinfo();
 }
 
-ex add::thisexpairseq(epvector const & v, ex const & oc) const
+ex add::thisexpairseq(const epvector & v, const ex & oc) const
 {
     return (new add(v,oc))->setflag(status_flags::dynallocated);
 }
 
-ex add::thisexpairseq(epvector * vp, ex const & oc) const
+ex add::thisexpairseq(epvector * vp, const ex & oc) const
 {
     return (new add(vp,oc))->setflag(status_flags::dynallocated);
 }
 
-expair add::split_ex_to_pair(ex const & e) const
+expair add::split_ex_to_pair(const ex & e) const
 {
     if (is_ex_exactly_of_type(e,mul)) {
-        mul const & mulref=ex_to_mul(e);
+        const mul & mulref=ex_to_mul(e);
         ex numfactor=mulref.overall_coeff;
         // mul * mulcopyp=static_cast<mul *>(mulref.duplicate());
         mul * mulcopyp=new mul(mulref);
@@ -479,12 +473,12 @@ expair add::split_ex_to_pair(ex const & e) const
     return expair(e,_ex1());
 }
 
-expair add::combine_ex_with_coeff_to_pair(ex const & e,
-                                          ex const & c) const
+expair add::combine_ex_with_coeff_to_pair(const ex & e,
+                                          const ex & c) const
 {
     GINAC_ASSERT(is_ex_exactly_of_type(c,numeric));
     if (is_ex_exactly_of_type(e,mul)) {
-        mul const & mulref=ex_to_mul(e);
+        const mul & mulref=ex_to_mul(e);
         ex numfactor=mulref.overall_coeff;
         //mul * mulcopyp=static_cast<mul *>(mulref.duplicate());
         mul * mulcopyp=new mul(mulref);
@@ -507,8 +501,8 @@ expair add::combine_ex_with_coeff_to_pair(ex const & e,
     return expair(e,c);
 }
     
-expair add::combine_pair_with_coeff_to_pair(expair const & p,
-                                            ex const & c) const
+expair add::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));
@@ -521,7 +515,7 @@ expair add::combine_pair_with_coeff_to_pair(expair const & p,
     return expair(p.rest,ex_to_numeric(p.coeff).mul_dyn(ex_to_numeric(c)));
 }
     
-ex add::recombine_pair_to_ex(expair const & p) const
+ex add::recombine_pair_to_ex(const expair & p) const
 {
     //if (p.coeff.compare(_ex1())==0) {
     //if (are_ex_trivially_equal(p.coeff,_ex1())) {
@@ -534,12 +528,16 @@ ex add::recombine_pair_to_ex(expair const & p) const
 
 ex add::expand(unsigned options) const
 {
-    epvector * vp=expandchildren(options);
+    if (flags & status_flags::expanded)
+        return *this;
+    
+    epvector * vp = expandchildren(options);
     if (vp==0) {
         return *this;
     }
-    return (new add(vp,overall_coeff))->setflag(status_flags::expanded    |
-                                                status_flags::dynallocated );
+    return (new add(vp,overall_coeff))->
+        setflag(status_flags::expanded |
+                status_flags::dynallocated);
 }
 
 //////////
@@ -560,15 +558,15 @@ ex add::expand(unsigned options) const
 
 // protected
 
-unsigned add::precedence=40;
+unsigned add::precedence = 40;
 
 //////////
 // global constants
 //////////
 
 const add some_add;
-type_info const & typeid_add=typeid(some_add);
+const type_info & typeid_add = typeid(some_add);
 
-#ifndef NO_GINAC_NAMESPACE
+#ifndef NO_NAMESPACE_GINAC
 } // namespace GiNaC
-#endif // ndef NO_GINAC_NAMESPACE
+#endif // ndef NO_NAMESPACE_GINAC