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/*======================================================================
EC1(c,L,Bs)
Establish Children of the root.
\Input
\parm{c} is the root cell.
\parm{L} is a list of real roots. (See CONSTRUCT for detail.)
\parm{Bs} is the basis.
\Output
The children of the cell \v{c} are established.
======================================================================*/
#include "qepcad.h"
void EC1(Word c, Word L, Word Bs)
{
Word B,I,J,Lp,M,N,S,Sp,P,a,b,kp,l,r,s,xb,xp,Lp1,OL;
/* hide kp,xp; */
Word T;
Step1: /* Initialize. */
S = NIL; Lp = L; kp = 1; xp = 0;
M = PMON(1,1); J = LIST2(0,0);
Step2: /* No real root. */
if (Lp != NIL) goto Step3;
a = CSSP(NIL,NIL);
b = LIST1(a); s = LIST3(M,J,b);
xp = xp + 1; xb = LIST1(xp);
P = LIST1(0);
Sp = MCELL(kp,NIL,FALSE,LELTI(c,TRUTH),s,xb,P,LELTI(c,HOWTV),NIL,NIL); S = COMP(Sp,S);
SLELTI(c,CHILD,S);
goto Return;
Step3: /* First sector. */
ADV(Lp,&Lp1,&Lp);
FIRST3(Lp1,&B,&I,&OL); FIRST2(I,&l,&r);
a = AFFRN(CSSP(NIL,l));
T = r;
b = LIST1(a); s = LIST3(M,J,b);
xp = xp + 1; xb = LIST1(xp);
P = LIST1(0);
Sp = MCELL(kp,NIL,FALSE,LELTI(c,TRUTH),s,xb,P,LELTI(c,HOWTV),NIL,NIL); S = COMP(Sp,S);
Step4: /* First section. */
if (PDEG(B) == 1)
{ a = IUPRLP(B); a = AFFRN(a); b = LIST1(a); s = LIST3(M,J,b); }
else
{ a = AFGEN(); b = LIST1(a); s = LIST3(B,I,b); }
xp = xp + 1; xb = LIST1(xp);
P = LIST1(0);
N = NIL;
for(Word X = OL; X != NIL; X = RED(X)) { N = COMP(LIST2(THIRD(LELTI(FIRST(X),PO_LABEL)),1),N); }
Sp = MCELL(kp,NIL,FALSE,LELTI(c,TRUTH),s,xb,P,LELTI(c,HOWTV),NIL,N); S = COMP(Sp,S);
Step5: /* Check if there are more roots. */
if (Lp == NIL) goto Step9;
Step6: /* Next sector. */
ADV(Lp,&Lp1,&Lp);
FIRST3(Lp1,&B,&I,&OL); FIRST2(I,&l,&r);
a = AFFRN(CSSP(T,l));
T = r;
b = LIST1(a); s = LIST3(M,J,b);
xp = xp + 1; xb = LIST1(xp);
P = LIST1(0);
Sp = MCELL(kp,NIL,FALSE,LELTI(c,TRUTH),s,xb,P,LELTI(c,HOWTV),NIL,NIL); S = COMP(Sp,S);
Step7: /* Next section. */
if (PDEG(B) == 1)
{ a = IUPRLP(B); a = AFFRN(a); b = LIST1(a); s = LIST3(M,J,b); }
else
{ a = AFGEN(); b = LIST1(a); s = LIST3(B,I,b); }
xp = xp + 1; xb = LIST1(xp);
P = LIST1(0);
N = NIL;
for(Word X = OL; X != NIL; X = RED(X)) { N = COMP(LIST2(THIRD(LELTI(FIRST(X),PO_LABEL)),1),N); }
Sp = MCELL(kp,NIL,FALSE,LELTI(c,TRUTH),s,xb,P,LELTI(c,HOWTV),NIL,N); S = COMP(Sp,S);
Step8: /* Loop. */
goto Step5;
Step9: /* Last sector. */
a = AFFRN(CSSP(T,NIL));
b = LIST1(a); s = LIST3(M,J,b);
xp = xp + 1; xb = LIST1(xp);
P = LIST1(0);
Sp = MCELL(kp,NIL,FALSE,LELTI(c,TRUTH),s,xb,P,LELTI(c,HOWTV),NIL,NIL); S = COMP(Sp,S);
Step10: /* Finalize. */
S = INV(S); SLELTI(c,CHILD,S); goto Return;
Return: /* Prepare for return. */
return;
}
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