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comexpr.c
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/** @file comexpr.c
*
* Compiler routines for statements that involve algebraic expressions.
* These involve definitions, id-statements, the multiply statement
* and the fill statement.
*/
/* #[ License : */
/*
* Copyright (C) 1984-2022 J.A.M. Vermaseren
* When using this file you are requested to refer to the publication
* J.A.M.Vermaseren "New features of FORM" math-ph/0010025
* This is considered a matter of courtesy as the development was paid
* for by FOM the Dutch physics granting agency and we would like to
* be able to track its scientific use to convince FOM of its value
* for the community.
*
* This file is part of FORM.
*
* FORM is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* FORM is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with FORM. If not, see <http://www.gnu.org/licenses/>.
*/
/* #] License : */
/*
#[ Includes : compi2.c
File contains most of what has to do with compiling expressions.
Main supporting file: token.c
*/
#include "form3.h"
static struct id_options {
UBYTE *name;
int code;
int dummy;
} IdOptions[] = {
{(UBYTE *)"multi", SUBMULTI ,0}
,{(UBYTE *)"many", SUBMANY ,0}
,{(UBYTE *)"only", SUBONLY ,0}
,{(UBYTE *)"once", SUBONCE ,0}
,{(UBYTE *)"ifmatch", SUBAFTER ,0}
,{(UBYTE *)"ifnomatch", SUBAFTERNOT ,0}
,{(UBYTE *)"ifnotmatch", SUBAFTERNOT ,0}
,{(UBYTE *)"disorder", SUBDISORDER ,0}
,{(UBYTE *)"select", SUBSELECT ,0}
,{(UBYTE *)"all", SUBALL ,0}
};
/*
#] Includes :
#[ CoLocal :
*/
int CoLocal(UBYTE *inp) { return(DoExpr(inp,LOCALEXPRESSION,0)); }
/*
#] CoLocal :
#[ CoGlobal :
*/
int CoGlobal(UBYTE *inp) { return(DoExpr(inp,GLOBALEXPRESSION,0)); }
/*
#] CoGlobal :
#[ CoLocalFactorized :
*/
int CoLocalFactorized(UBYTE *inp) { return(DoExpr(inp,LOCALEXPRESSION,1)); }
/*
#] CoLocalFactorized :
#[ CoGlobalFactorized :
*/
int CoGlobalFactorized(UBYTE *inp) { return(DoExpr(inp,GLOBALEXPRESSION,1)); }
/*
#] CoGlobalFactorized :
#[ DoExpr:
*/
int DoExpr(UBYTE *inp, int type, int par)
{
GETIDENTITY
int error = 0;
UBYTE *p, *q, c;
WORD *w, i, j = 0, c1, c2, *OldWork = AT.WorkPointer, osize;
WORD jold = 0;
POSITION pos;
while ( *inp == ',' ) inp++;
if ( par ) AC.ToBeInFactors = 1;
else AC.ToBeInFactors = 0;
p = inp;
while ( *p && *p != '=' ) {
if ( *p == '(' ) SKIPBRA4(p)
else if ( *p == '{' ) SKIPBRA5(p)
else if ( *p == '[' ) SKIPBRA1(p)
else p++;
}
if ( *p ) { /* Variety with the = sign */
if ( ( q = SkipAName(inp) ) == 0 || q[-1] == '_' ) {
MesPrint("&Illegal name for expression");
error = 1;
if ( q[-1] == '_' ) {
while ( FG.cTable[*q] < 2 || *q == '_' ) q++;
}
}
else {
c = *q; *q = 0;
if ( GetVar(inp,&c1,&c2,ALLVARIABLES,NOAUTO) != NAMENOTFOUND ) {
if ( c1 == CEXPRESSION ) {
if ( Expressions[c2].status == STOREDEXPRESSION ) {
MesPrint("&Illegal attempt to overwrite a stored expression");
error = 1;
}
else {
HighWarning("Expression is replaced by new definition");
if ( AO.OptimizeResult.nameofexpr != NULL &&
StrCmp(inp,AO.OptimizeResult.nameofexpr) == 0 ) {
ClearOptimize();
}
if ( Expressions[c2].status != DROPPEDEXPRESSION ) {
w = &(Expressions[c2].status);
if ( *w == LOCALEXPRESSION || *w == SKIPLEXPRESSION )
*w = DROPLEXPRESSION;
else if ( *w == GLOBALEXPRESSION || *w == SKIPGEXPRESSION )
*w = DROPGEXPRESSION;
else if ( *w == HIDDENLEXPRESSION )
*w = DROPHLEXPRESSION;
else if ( *w == HIDDENGEXPRESSION )
*w = DROPHGEXPRESSION;
}
AC.TransEname = Expressions[c2].name;
j = EntVar(CEXPRESSION,0,type,0,0,0);
Expressions[j].node = Expressions[c2].node;
Expressions[c2].replace = j;
}
}
else {
MesPrint("&name of expression is also name of a variable");
error = 1;
j = EntVar(CEXPRESSION,inp,type,0,0,0);
}
jold = c2;
}
else {
/*
Here we have to worry about reuse of the expression in the
same module. That will need AS.Oldvflags but that may not
be defined or have the proper value.
*/
j = EntVar(CEXPRESSION,inp,type,0,0,0);
jold = j;
}
*q = c;
OldWork = w = AT.WorkPointer;
*w++ = TYPEEXPRESSION;
*w++ = 3+SUBEXPSIZE;
*w++ = j;
AC.ProtoType = w;
AR.CurExpr = j; /* Block expression j */
*w++ = SUBEXPRESSION;
*w++ = SUBEXPSIZE;
*w++ = j;
*w++ = 1;
*w++ = AC.cbufnum;
FILLSUB(w)
if ( c == '(' ) {
while ( *q == ',' || *q == '(' ) {
inp = q+1;
if ( ( q = SkipAName(inp) ) == 0 ) {
MesPrint("&Illegal name for expression argument");
error = 1;
q = p - 1;
break;
}
c = *q; *q = 0;
if ( GetVar(inp,&c1,&c2,ALLVARIABLES,WITHAUTO) < 0 ) c1 = -1;
switch ( c1 ) {
case CSYMBOL :
*w++ = SYMTOSYM; *w++ = 4; *w++ = c2; *w++ = 0;
break;
case CINDEX :
*w++ = INDTOIND; *w++ = 4;
*w++ = c2 + AM.OffsetIndex; *w++ = 0;
break;
case CVECTOR :
*w++ = VECTOVEC; *w++ = 4;
*w++ = c2 + AM.OffsetVector; *w++ = 0;
break;
case CFUNCTION :
*w++ = FUNTOFUN; *w++ = 4; *w++ = c2 + FUNCTION; *w++ = 0;
break;
default :
MesPrint("&Illegal expression parameter: %s",inp);
error = 1;
break;
}
*q = c;
}
if ( *q != ')' || q+1 != p ) {
MesPrint("&Illegal use of arguments for expression");
error = 1;
}
AC.ProtoType[1] = w - AC.ProtoType;
}
else if ( c != '=' ) {
/*
The dummy accepted L F := RHS;
*/
MesPrint("&Illegal LHS for expression definition");
error = 1;
}
*w++ = 1;
*w++ = 1;
*w++ = 3;
*w++ = 0;
SeekScratch(AR.outfile,&pos);
Expressions[j].counter = 1;
Expressions[j].onfile = pos;
Expressions[j].whichbuffer = 0;
#ifdef PARALLELCODE
Expressions[j].partodo = AC.inparallelflag;
#endif
OldWork[2] = w - OldWork - 3;
AT.WorkPointer = w;
/*
Writing the expression prototype to disk and to the compiler
buffer is done only after the RHS has been compiled because
we don't know the number of the main level RHS yet.
*/
}
inp = p+1;
ClearWildcardNames();
osize = AC.ProtoType[1]; AC.ProtoType[1] = SUBEXPSIZE;
PutInVflags(jold);
if ( ( i = CompileAlgebra(inp,RHSIDE,AC.ProtoType) ) < 0 ) {
AC.ProtoType[1] = osize;
error = 1;
}
else if ( error == 0 ) {
AC.ProtoType[1] = osize;
AC.ProtoType[2] = i;
if ( PutOut(BHEAD OldWork+2,&pos,AR.outfile,0) < 0 ) {
MesPrint("&Cannot create expression");
error = -1;
}
else {
Expressions[j].sizeprototype = OldWork[2];
OldWork[2] = 4+SUBEXPSIZE;
OldWork[4] = SUBEXPSIZE;
OldWork[5] = i;
OldWork[SUBEXPSIZE+3] = 1;
OldWork[SUBEXPSIZE+4] = 1;
OldWork[SUBEXPSIZE+5] = 3;
OldWork[SUBEXPSIZE+6] = 0;
if ( PutOut(BHEAD OldWork+2,&pos,AR.outfile,0) < 0
|| FlushOut(&pos,AR.outfile,0) ) {
MesPrint("&Cannot create expression");
error = -1;
}
AR.outfile->POfull = AR.outfile->POfill;
}
OldWork[2] = j;
/*
Seems unnecessary (13-feb-2018)
AddNtoL(OldWork[1],OldWork);
*/
AT.WorkPointer = OldWork;
if ( AC.dumnumflag ) Add2Com(TYPEDETCURDUM)
}
AC.ToBeInFactors = 0;
}
else { /* Variety in which expressions change property */
/*
This code got a major revision because it didn't
take hidden expressions into account. (1-jun-2010 JV)
*/
do {
if ( ( q = SkipAName(inp) ) == 0 ) {
MesPrint("&Illegal name(s) for expression(s)");
return(1);
}
c = *q; *q = 0;
if ( GetName(AC.exprnames,inp,&c2,NOAUTO) == NAMENOTFOUND ) {
MesPrint("&%s is not a valid expression",inp);
error = 1;
}
else {
w = &(Expressions[c2].status);
if ( type == LOCALEXPRESSION ) {
switch ( *w ) {
case GLOBALEXPRESSION:
*w = LOCALEXPRESSION;
break;
case SKIPGEXPRESSION:
*w = SKIPLEXPRESSION;
break;
case DROPGEXPRESSION:
*w = DROPLEXPRESSION;
break;
case HIDDENGEXPRESSION:
*w = HIDDENLEXPRESSION;
break;
case HIDEGEXPRESSION:
*w = HIDELEXPRESSION;
break;
case UNHIDEGEXPRESSION:
*w = UNHIDELEXPRESSION;
break;
case INTOHIDEGEXPRESSION:
*w = INTOHIDELEXPRESSION;
break;
case DROPHGEXPRESSION:
*w = DROPHLEXPRESSION;
break;
}
}
else if ( type == GLOBALEXPRESSION ) {
switch ( *w ) {
case LOCALEXPRESSION:
*w = GLOBALEXPRESSION;
break;
case SKIPLEXPRESSION:
*w = SKIPGEXPRESSION;
break;
case DROPLEXPRESSION:
*w = DROPGEXPRESSION;
break;
case HIDDENLEXPRESSION:
*w = HIDDENGEXPRESSION;
break;
case HIDELEXPRESSION:
*w = HIDEGEXPRESSION;
break;
case UNHIDELEXPRESSION:
*w = UNHIDEGEXPRESSION;
break;
case INTOHIDELEXPRESSION:
*w = INTOHIDEGEXPRESSION;
break;
case DROPHLEXPRESSION:
*w = DROPHGEXPRESSION;
break;
}
}
/*
old code
if ( type != LOCALEXPRESSION || *w != STOREDEXPRESSION )
*w = type;
*/
}
*q = c; inp = q+1;
} while ( c == ',' );
if ( c ) {
MesPrint("&Illegal object in local or global redefinition");
error = 1;
}
}
return(error);
}
/*
#] DoExpr:
#[ CoIdOld :
*/
int CoIdOld(UBYTE *inp)
{
AC.idoption = 0;
return(CoIdExpression(inp,TYPEIDOLD));
}
/*
#] CoIdOld :
#[ CoId :
*/
int CoId(UBYTE *inp)
{
AC.idoption = 0;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoId :
#[ CoIdNew :
*/
int CoIdNew(UBYTE *inp)
{
AC.idoption = 0;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoIdNew :
#[ CoDisorder :
*/
int CoDisorder(UBYTE *inp)
{
AC.idoption = SUBDISORDER;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoDisorder :
#[ CoMany :
*/
int CoMany(UBYTE *inp)
{
AC.idoption = SUBMANY;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoMany :
#[ CoMulti :
*/
int CoMulti(UBYTE *inp)
{
AC.idoption = SUBMULTI;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoMulti :
#[ CoIfMatch :
*/
int CoIfMatch(UBYTE *inp)
{
AC.idoption = SUBAFTER;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoIfMatch :
#[ CoIfNoMatch :
*/
int CoIfNoMatch(UBYTE *inp)
{
AC.idoption = SUBAFTERNOT;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoIfNoMatch :
#[ CoOnce :
*/
int CoOnce(UBYTE *inp)
{
AC.idoption = SUBONCE;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoOnce :
#[ CoOnly :
*/
int CoOnly(UBYTE *inp)
{
AC.idoption = SUBONLY;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoOnly :
#[ CoSelect :
*/
int CoSelect(UBYTE *inp)
{
AC.idoption = SUBSELECT;
return(CoIdExpression(inp,TYPEIDNEW));
}
/*
#] CoSelect :
#[ CoIdExpression :
First finish dealing with secondary keywords
*/
int CoIdExpression(UBYTE *inp, int type)
{
GETIDENTITY
int i, j, idhead, error = 0, MinusSign = 0, opt, retcode;
WORD *w, *s, *m, *mm, *ww, *FirstWork, *OldWork, c1, numsets = 0,
oldnumrhs, *ow, oldEside;
UBYTE *p, *pp, c;
CBUF *C = cbuf+AC.cbufnum;
LONG oldcpointer, x;
FirstWork = OldWork = AT.WorkPointer;
/*
Don't forget to change in StudyPattern if we change/add_to the
following setup.
if ( type == TYPEIF ) idhead = IDHEAD-1;
else
*/
idhead = IDHEAD;
AR.CurExpr = -1;
w = AT.WorkPointer;
*w++ = type;
*w++ = idhead + SUBEXPSIZE;
w++;
if ( idhead >= IDHEAD ) *w++ = -1;
#if IDHEAD > 4
for ( i = 4; i < idhead; i++ ) *w++ = 0;
#endif
while ( *inp == ',' ) inp++;
p = inp;
if ( AC.idoption == SUBSELECT ) {
p--;
goto findsets;
}
else if ( ( AC.idoption == SUBAFTER ) || ( AC.idoption == SUBAFTERNOT ) ) {
while ( *p && *p != '=' && *p != ',' ) {
if ( *p == '(' ) SKIPBRA4(p)
else if ( *p == '{' ) SKIPBRA5(p)
else if ( *p == '[' ) SKIPBRA1(p)
else p++;
}
if ( *p == '=' || *inp != '-' || inp[1] != '>' ) {
MesPrint("&Illegal use if if[no]match in id statement");
error = 1; goto AllDone;
}
if ( *p == 0 ) {
MesPrint("&id-statement without = sign");
error = 1; goto AllDone;
}
inp += 2; pp = inp;
goto readlabel;
}
for(;;) {
while ( *p && *p != '=' && *p != ',' ) {
if ( *p == '(' ) SKIPBRA4(p)
else if ( *p == '{' ) SKIPBRA5(p)
else if ( *p == '[' ) SKIPBRA1(p)
else p++;
}
if ( *p == '=' ) break;
if ( *p == 0 ) {
MesPrint("&id-statement without = sign");
error = 1; goto AllDone;
}
/*
We have either a secondary option or a syntax error
*/
pp = inp;
while ( FG.cTable[*pp] == 0 ) pp++;
c = *pp; *pp = 0;
i = sizeof(IdOptions)/sizeof(struct id_options);
while ( --i >= 0 ) {
if ( StrICmp(inp,IdOptions[i].name) == 0 ) break;
}
if ( i < 0 ) {
MesPrint("&Illegal option %s in id-statement",inp);
*pp = c; error = 1; p++; inp = p; continue;
}
opt = IdOptions[i].code;
*pp = c;
inp = pp+1;
switch ( opt ) {
case SUBDISORDER:
if ( pp != p ) goto IllField;
AC.idoption |= SUBDISORDER;
p++; inp = p;
break;
case SUBSELECT:
if ( p != pp ) goto IllField;
if ( ( AC.idoption & SUBMASK ) != 0 ) {
if ( AC.idoption == SUBMULTI && type == TYPEIF ) {}
else {
MesPrint("&Conflicting options in id-statement");
error = 1;
}
}
findsets:;
/*
Now we read the sets
*/
numsets = 0;
for(;;) {
inp = ++p;
while ( *p && *p != '=' && *p != ',' ) {
if ( *p == '(' ) SKIPBRA4(p)
else if ( *p == '{' ) SKIPBRA5(p)
else if ( *p == '[' ) SKIPBRA1(p)
else p++;
}
if ( *p == '=' ) break;
if ( *p == 0 ) {
MesPrint("&id-statement without = sign");
error = 1; goto AllDone;
}
/*
We have a set at inp.
*/
if ( *inp == '{' ) {
if ( p[-1] != '}' ) {
c = *p; *p = 0;
MesPrint("&Illegal temporary set: %s",inp);
error = 1; *p = c;
}
else {
inp++;
c = p[-1]; p[-1] = 0;
c1 = DoTempSet(inp,p-1);
*w++ = c1;
p[-1] = c;
numsets++;
if ( w[-1] < 0 ) error = 1;
}
}
else {
c = *p; *p = 0;
if ( GetName(AC.varnames,inp,&c1,NOAUTO) != CSET ) {
MesPrint("&%s is not a set",inp);
error = 1;
}
else {
if ( c1 < AM.NumFixedSets ) {
MesPrint("&Built in sets are not allowed in the select option");
error = 1;
}
else if ( Sets[c1].type == CRANGE ) {
MesPrint("&Ranged sets are not allowed in the select option");
error = 1;
}
numsets++;
*w++ = c1;
}
*p = c;
}
}
/*
Now exchange the positions a bit.
Regular stuff at OldWork, numsets sets at FirstWork[idhead]
*/
OldWork = w;
for ( i = 0; i < idhead; i++ ) *w++ = FirstWork[i];
AC.idoption = SUBSELECT;
break;
case SUBAFTER:
case SUBAFTERNOT:
if ( type == TYPEIF ) {
MesPrint("&The if[no]match->label option is not allowed in an if statement");
error = 1; goto AllDone;
}
if ( pp[0] != '-' || pp[1] != '>' ) goto IllField;
pp += 2; /* points now at the label */
inp = pp;
AC.idoption |= opt;
readlabel:
while ( FG.cTable[*pp] <= 1 ) pp++;
if ( pp != p ) {
c = *p; *p = 0;
MesPrint("&Illegal label %s in if[no]match option of id-statement",inp);
*p = c; error = 1; inp = p+1; continue;
}
c = *p; *p = 0;
OldWork[3] = GetLabel(inp);
*p++ = c; inp = p;
break;
case SUBALL:
x = 0;
if ( *pp == '(' ) {
if ( FG.cTable[*inp] == 1 ) {
while ( *inp >= '0' && *inp <= '9' ) x = 10*x+*inp++ - '0';
}
else {
pp++;
while ( FG.cTable[*inp] == 0 ) inp++;
c = *inp; *inp = 0;
if ( StrICont(pp,(UBYTE *)"normalize") != 0 ) goto IllOpt;
*inp = c;
OldWork[4] |= NORMALIZEFLAG;
}
if ( *inp != ')' || inp+1 != p ) {
c = *inp; *inp = 0;
IllOpt:
MesPrint("&Illegal ALL option in id-statement: ",pp);
*inp++ = c;
error = 1;
continue;
}
pp = inp;
inp = pp+1;
}
/*
Note that the following statement limits x to
*/
if ( x > MAXPOSITIVE ) {
MesPrint("&Requested maximum number of matches %l in ALL option in id-statement is greater than %l ",x,MAXPOSITIVE);
error = 1;
}
OldWork[5] = x;
if ( type != TYPEIDNEW ) {
if ( type == TYPEIDOLD ) {
MesPrint("&Requested ALL option not allowed in idold/also statement.");
error = 1;
}
else if ( type == TYPEIF ) {
MesPrint("&Requested ALL option not allowed in if(match())");
error = 1;
}
else {
MesPrint("&ALL option only allowed in regular id-statement.");
error = 1;
}
}
p++; inp = p;
AC.idoption = opt;
break;
default:
if ( pp != p ) {
IllField: c = *p; *p = 0;
MesPrint("&Illegal optionfield %s in id-statement",inp);
*p = c; error = 1; inp = p+1; continue;
}
i = AC.idoption & SUBMASK;
if ( i && i != opt ) {
MesPrint("&Conflicting options in id-statement");
error = 1; continue;
}
else AC.idoption |= opt;
while ( *p == ',' ) p++;
inp = p;
break;
}
}
if ( ( AC.idoption & SUBMASK ) == 0 ) AC.idoption |= SUBMULTI;
OldWork[2] = AC.idoption;
/*
Now we have a field till the = sign
Now the subexpression prototype
*/
AC.ProtoType = w;
*w++ = SUBEXPRESSION;
*w++ = SUBEXPSIZE;
*w++ = C->numrhs+1;
*w++ = 1;
*w++ = AC.cbufnum;
FILLSUB(w)
AC.WildC = w;
AC.NwildC = 0;
AT.WorkPointer = s = w + 4*AM.MaxWildcards + 8;
/*
Now read the LHS
*/
ClearWildcardNames();
oldcpointer = AddLHS(AC.cbufnum) - C->Buffer;
*p = 0;
oldnumrhs = C->numrhs;
if ( ( retcode = CompileAlgebra(inp,LHSIDE,AC.ProtoType) ) < 0 ) { error = 1; }
else AC.ProtoType[2] = retcode;
*p = '='; inp = p+1;
AT.WorkPointer = s;
if ( AC.NwildC && SortWild(w,AC.NwildC) ) error = 1;
/* Make the LHS pointers ready */
OldWork[1] = AC.WildC-OldWork;
OldWork[idhead+1] = OldWork[1] - idhead;
w = AC.WildC;
AT.WorkPointer = w;
s = C->rhs[C->numrhs];
/*
Now check whether wildcards get converted to dollars (for PARALLEL)
*/
{
WORD *tw, *twstop;
tw = AC.ProtoType; twstop = tw + tw[1]; tw += SUBEXPSIZE;
while ( tw < twstop ) {
if ( *tw == LOADDOLLAR ) {
AddPotModdollar(tw[2]);
}
tw += tw[1];
}
}
/*
We have the expression in the compiler buffers.
The main level is at lhs[numlhs]
The partial lhs (including ProtoType) is in OldWork (in WorkSpace)
We need to load the result at w after the prototype
Because these sort routines don't use the WorkSpace
there should not be a conflict
*/
if ( !error && *s == 0 ) {
IllLeft:MesPrint("&Illegal LHS");
AC.lhdollarflag = 0;
return(1);
}
if ( !error && *(s+*s) != 0 ) {
MesPrint("&LHS should be one term only");
return(1);
}
if ( error == 0 ) {
WORD oldpolyfun = AR.PolyFun;
if ( NewSort(BHEAD0) || NewSort(BHEAD0) ) {
if ( !error ) error = 1;
return(error);
}
AN.RepPoint = AT.RepCount + 1;
ow = (WORD *)(((UBYTE *)(AT.WorkPointer)) + AM.MaxTer);
mm = s; ww = ow; i = *mm;
while ( --i >= 0 ) *ww++ = *mm++; AT.WorkPointer = ww;
AC.lhdollarflag = 0; oldEside = AR.Eside; AR.Eside = LHSIDE;
AR.Cnumlhs = C->numlhs;
AR.PolyFun = 0;
if ( Generator(BHEAD ow,C->numlhs) ) {
AR.Eside = oldEside;
LowerSortLevel(); LowerSortLevel(); AR.PolyFun = oldpolyfun; goto IllLeft;
}
AR.Eside = oldEside;
AT.WorkPointer = w;
if ( EndSort(BHEAD w,0) < 0 ) { LowerSortLevel(); AR.PolyFun = oldpolyfun; goto IllLeft; }
AR.PolyFun = oldpolyfun;
if ( *w == 0 || *(w+*w) != 0 ) {
MesPrint("&LHS must be one term");
AC.lhdollarflag = 0;
return(1);
}
LowerSortLevel();
if ( AC.lhdollarflag ) MarkDirty(w,DIRTYFLAG);
}
AT.WorkPointer = w + *w;
AC.DumNum = 0;
/*
Everything is now after OldWork. We can pop the compilerbuffer.
Next test for illegal things like a coefficient
At this point we have:
w = the term of the LHS
*/
C->Pointer = C->Buffer + oldcpointer;
C->numrhs = oldnumrhs;
C->numlhs--;
m = w + *w - 3;
AC.vectorlikeLHS = 0;
if ( !error ) {
if ( m[2] != 3 || m[1] != 1 || *m != 1 ) {
if ( *m == 1 && m[1] == 1 && m[2] == -3 ) {
MinusSign = 1;
}
else {
MesPrint("&Coefficient in LHS");
error = 1;
AC.DumNum = 0;
*w -= ABS(m[2])-3;
}
}
if ( *w == 7 && w[1] == INDEX && w[3] < 0 ) {
if ( ( AC.idoption & SUBMASK ) != 0 && ( AC.idoption & SUBMASK ) !=
SUBMULTI ) {
MesPrint("&Illegal option for substitution of a vector");
error = 1;
}
AC.DumNum = AM.IndDum;
OldWork[2] = ( OldWork[2] - ( OldWork[2] & SUBMASK ) ) | SUBVECTOR;
c1 = w[3];
/* We overwrite the LHS */
*w++ = INDTOIND;
*w++ = 4;
*w++ = AC.DumNum + WILDOFFSET;
*w++ = 0;
w[0] = 5;
w[1] = VECTOR;
w[2] = 4;
w[3] = c1;
w[4] = AC.DumNum + WILDOFFSET;
OldWork[idhead+1] = w - OldWork - idhead;
AC.vectorlikeLHS = 1;
}
else {
AC.DumNum = 0;
*w -= 3;
i = OldWork[2] & SUBMASK;
m = w + *w;
if ( i == 0 || i == SUBMULTI ) {
s = w+1;
while ( s < m ) {
if ( *s == SYMBOL ) {
j = s[1]/2; s += 2;
while ( --j >= 0 ) {
if ( ABS(s[1]) > 2*MAXPOWER ) {
OldWork[2] = ( OldWork[2] - i ) | SUBONCE;
break;
}
s += 2;
}
if ( j >= 0 ) break;
}
else if ( *s == DOTPRODUCT ) {
j = s[1]/3; s += 2;
while ( --j >= 0 ) {
if ( ABS(s[2]) > 2*MAXPOWER ) {
OldWork[2] = ( OldWork[2] - i ) | SUBONCE;
break;
}
else if ( s[1] >= -(2*WILDOFFSET) || s[0] >= -(2*WILDOFFSET) ) {
OldWork[2] = ( OldWork[2] - i ) | SUBMANY;
i = SUBMANY;
}
s += 3;
}
if ( j >= 0 ) break;
}
else {
OldWork[2] = ( OldWork[2] - i ) | SUBMANY;
break;
}
}
}
if ( ( OldWork[2] & SUBMASK ) == 0 ) OldWork[2] |= SUBMULTI;
}
if ( ( OldWork[2] & SUBMASK ) == SUBSELECT ) {
/*
Paste the SETSET information after the pattern.
Important note: We will still get function information for the
smart patternmatching after it. To distinguish them we need to have
that SETSET != m*n+1 in which m is the number of words per function
and n the number of functions. Currently (29-may-1997) m = 4.
*/
*m++ = SETSET;
*m++ = numsets+2;
s = FirstWork + idhead;
while ( --numsets >= 0 ) *m++ = *s++;
}
else {
m = w + *w;
}
}
/*
We keep the whole thing in OldWork for the moment.
We still have to add the number of the RHS expression.
There is also some opportunity now to be smart about the pattern.
This is needed for complicated wildcarding with symmetric functions.
We do this in a special routine during compile time to make sure
that we loose as little time as possible (during running) if there
is no need to be smart.
*/
*m++ = 0;
OldWork[1] = m - OldWork;
AC.ProtoType = OldWork+idhead;
if ( !error ) {
if ( StudyPattern(OldWork) ) error = 1;
}
AT.WorkPointer = OldWork + OldWork[1];
if ( AC.lhdollarflag ) OldWork[4] |= DOLLARFLAG;
AC.lhdollarflag = 0;
/*
Test whether the id/idold configuration is fine.
*/
if ( type == TYPEIDOLD ) {
WORD ci = C->numlhs;
while ( ci >= 1 ) {
if ( C->lhs[ci][0] == TYPEIDNEW ) {
if ( (C->lhs[ci][2] & SUBMASK) == SUBALL ) {
MesPrint("&Idold/also cannot follow an id,all statement.");
error = 1;
}
break;
}
else if ( C->lhs[ci][0] == TYPEDETCURDUM ) { ci--; continue; }
else if ( C->lhs[ci][0] == TYPEIDOLD ) { ci--; continue; }
else ci = 0;
}
if ( ci < 1 ) {
MesPrint("&Idold/also should follow an id/idnew statement.");
error = 1;
}
}
/*
Now the right hand side.
*/