=================================================================== RCS file: /home/cvs/OpenXM_contrib2/asir2000/engine/P.c,v retrieving revision 1.2 retrieving revision 1.12 diff -u -p -r1.2 -r1.12 --- OpenXM_contrib2/asir2000/engine/P.c 2000/08/21 08:31:25 1.2 +++ OpenXM_contrib2/asir2000/engine/P.c 2018/03/29 01:32:51 1.12 @@ -23,7 +23,7 @@ * shall be made on your publication or presentation in any form of the * results obtained by use of the SOFTWARE. * (4) In the event that you modify the SOFTWARE, you shall notify FLL by - * e-mail at risa-admin@flab.fujitsu.co.jp of the detailed specification + * e-mail at risa-admin@sec.flab.fujitsu.co.jp of the detailed specification * for such modification or the source code of the modified part of the * SOFTWARE. * @@ -45,7 +45,7 @@ * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE, * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE. * - * $OpenXM: OpenXM_contrib2/asir2000/engine/P.c,v 1.1.1.1 1999/12/03 07:39:08 noro Exp $ + * $OpenXM: OpenXM_contrib2/asir2000/engine/P.c,v 1.11 2004/08/18 01:10:59 noro Exp $ */ #ifndef FBASE #define FBASE @@ -54,348 +54,48 @@ #include "b.h" #include "ca.h" -void D_ADDP(vl,p1,p2,pr) -VL vl; -P p1,p2,*pr; -{ - register DCP dc1,dc2,dcr0,dcr; - V v1,v2; - P t; +#include "poly.c" - if ( !p1 ) - *pr = p2; - else if ( !p2 ) - *pr = p1; - else if ( NUM(p1) ) - if ( NUM(p2) ) - ADDNUM(p1,p2,pr); - else - ADDPQ(p2,p1,pr); - else if ( NUM(p2) ) - ADDPQ(p1,p2,pr); - else if ( ( v1 = VR(p1) ) == ( v2 = VR(p2) ) ) { - for ( dc1 = DC(p1), dc2 = DC(p2), dcr0 = 0; dc1 && dc2; ) - switch ( cmpq(DEG(dc1),DEG(dc2)) ) { - case 0: - ADDP(vl,COEF(dc1),COEF(dc2),&t); - if ( t ) { - NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc1); COEF(dcr) = t; - } - dc1 = NEXT(dc1); dc2 = NEXT(dc2); break; - case 1: - NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc1); COEF(dcr) = COEF(dc1); - dc1 = NEXT(dc1); break; - case -1: - NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc2); COEF(dcr) = COEF(dc2); - dc2 = NEXT(dc2); break; - } - if ( !dcr0 ) - if ( dc1 ) - dcr0 = dc1; - else if ( dc2 ) - dcr0 = dc2; - else { - *pr = 0; - return; - } - else - if ( dc1 ) - NEXT(dcr) = dc1; - else if ( dc2 ) - NEXT(dcr) = dc2; - else - NEXT(dcr) = 0; - MKP(v1,dcr0,*pr); - } else { - while ( v1 != VR(vl) && v2 != VR(vl) ) - vl = NEXT(vl); - if ( v1 == VR(vl) ) - ADDPTOC(vl,p1,p2,pr); - else - ADDPTOC(vl,p2,p1,pr); - } -} - -void D_ADDPQ(p,q,pr) -P p,q,*pr; -{ - DCP dc,dcr,dcr0; - P t; - - if ( NUM(p) ) - ADDNUM(p,q,pr); - else { - for ( dcr0 = 0, dc = DC(p); dc && DEG(dc); dc = NEXT(dc) ) { - NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc); COEF(dcr) = COEF(dc); - } - if ( !dc ) { - NEWDC(NEXT(dcr)); dcr = NEXT(dcr); DEG(dcr) = 0; COEF(dcr) = q; - } else { - ADDPQ(COEF(dc),q,&t); - if ( t ) { - NEWDC(NEXT(dcr)); dcr = NEXT(dcr); DEG(dcr) = 0; COEF(dcr) = t; - } - } - NEXT(dcr) = 0; MKP(VR(p),dcr0,*pr); - } -} - -void D_ADDPTOC(vl,p,c,pr) -VL vl; -P p,c,*pr; -{ - DCP dc,dcr,dcr0; - P t; - - for ( dcr0 = 0, dc = DC(p); dc && DEG(dc); dc = NEXT(dc) ) { - NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc); COEF(dcr) = COEF(dc); - } - if ( !dc ) { - NEWDC(NEXT(dcr)); dcr = NEXT(dcr); DEG(dcr) = 0; COEF(dcr) = c; - } else { - ADDP(vl,COEF(dc),c,&t); - if ( t ) { - NEWDC(NEXT(dcr)); dcr = NEXT(dcr); DEG(dcr) = 0; COEF(dcr) = t; - } - } - NEXT(dcr) = 0; MKP(VR(p),dcr0,*pr); -} - -void D_SUBP(vl,p1,p2,pr) -VL vl; -P p1,p2,*pr; -{ - P t; - - if ( !p2 ) - *pr = p1; - else { - CHSGNP(p2,&t); ADDP(vl,p1,t,pr); - } -} - -void D_MULP(vl,p1,p2,pr) -VL vl; -P p1,p2,*pr; -{ - register DCP dc,dct,dcr,dcr0; - V v1,v2; - P t,s,u; - int n1,n2; - - if ( !p1 || !p2 ) *pr = 0; - else if ( NUM(p1) ) - MULPQ(p2,p1,pr); - else if ( NUM(p2) ) - MULPQ(p1,p2,pr); - else if ( ( v1 = VR(p1) ) == ( v2 = VR(p2) ) ) { - for ( dc = DC(p1), n1 = 0; dc; dc = NEXT(dc), n1++ ); - for ( dc = DC(p2), n2 = 0; dc; dc = NEXT(dc), n2++ ); - if ( n1 > n2 ) - for ( dc = DC(p2), s = 0; dc; dc = NEXT(dc) ) { - for ( dcr0 = 0, dct = DC(p1); dct; dct = NEXT(dct) ) { - NEXTDC(dcr0,dcr); MULP(vl,COEF(dct),COEF(dc),&COEF(dcr)); - addq(DEG(dct),DEG(dc),&DEG(dcr)); - } - NEXT(dcr) = 0; MKP(v1,dcr0,t); - ADDP(vl,s,t,&u); s = u; t = u = 0; - } - else - for ( dc = DC(p1), s = 0; dc; dc = NEXT(dc) ) { - for ( dcr0 = 0, dct = DC(p2); dct; dct = NEXT(dct) ) { - NEXTDC(dcr0,dcr); MULP(vl,COEF(dct),COEF(dc),&COEF(dcr)); - addq(DEG(dct),DEG(dc),&DEG(dcr)); - } - NEXT(dcr) = 0; MKP(v1,dcr0,t); - ADDP(vl,s,t,&u); s = u; t = u = 0; - } - *pr = s; - } else { - while ( v1 != VR(vl) && v2 != VR(vl) ) - vl = NEXT(vl); - if ( v1 == VR(vl) ) - MULPC(vl,p1,p2,pr); - else - MULPC(vl,p2,p1,pr); - } -} - -void D_MULPQ(p,q,pr) -P p,q,*pr; -{ - DCP dc,dcr,dcr0; - P t; - - if (!p || !q) - *pr = 0; - else if ( Uniq(q) ) - *pr = p; - else if ( NUM(p) ) - MULNUM(p,q,pr); - else { - for ( dcr0 = 0, dc = DC(p); dc; dc = NEXT(dc) ) { - MULPQ(COEF(dc),q,&t); - if ( t ) { - NEXTDC(dcr0,dcr); COEF(dcr) = t; DEG(dcr) = DEG(dc); - } - } - if ( dcr0 ) { - NEXT(dcr) = 0; MKP(VR(p),dcr0,*pr); - } else - *pr = 0; - } -} - -void D_MULPC(vl,p,c,pr) -VL vl; -P p,c,*pr; -{ - DCP dc,dcr,dcr0; - P t; - - if ( NUM(c) ) - MULPQ(p,c,pr); - else { - for ( dcr0 = 0, dc = DC(p); dc; dc = NEXT(dc) ) { - MULP(vl,COEF(dc),c,&t); - if ( t ) { - NEXTDC(dcr0,dcr); COEF(dcr) = t; DEG(dcr) = DEG(dc); - } - } - if ( dcr0 ) { - NEXT(dcr) = 0; MKP(VR(p),dcr0,*pr); - } else - *pr = 0; - } -} - -void D_PWRP(vl,p,q,pr) -VL vl; -P p,*pr; -Q q; -{ - DCP dc,dcr; - int n,i; - P *x,*y; - P t,s,u; - DCP dct; - P *pt; - - if ( !q ) { - *pr = (P)One; - } else if ( !p ) - *pr = 0; - else if ( UNIQ(q) ) - *pr = p; - else if ( NUM(p) ) - PWRNUM(p,q,pr); - else { - dc = DC(p); - if ( !NEXT(dc) ) { - NEWDC(dcr); - PWRP(vl,COEF(dc),q,&COEF(dcr)); mulq(DEG(dc),q,&DEG(dcr)); - NEXT(dcr) = 0; MKP(VR(p),dcr,*pr); - } else if ( !INT(q) ) { - error("pwrp: can't calculate fractional power."); *pr = 0; - } else if ( PL(NM(q)) == 1 ) { - n = QTOS(q); x = (P *)ALLOCA((n+1)*sizeof(pointer)); - NEWDC(dct); DEG(dct) = DEG(dc); COEF(dct) = COEF(dc); - NEXT(dct) = 0; MKP(VR(p),dct,t); - for ( i = 0, u = (P)One; i < n; i++ ) { - x[i] = u; MULP(vl,u,t,&s); u = s; - } - x[n] = u; y = (P *)ALLOCA((n+1)*sizeof(pointer)); - if ( DEG(NEXT(dc)) ) { - dct = NEXT(dc); MKP(VR(p),dct,t); - } else - t = COEF(NEXT(dc)); - for ( i = 0, u = (P)One; i < n; i++ ) { - y[i] = u; MULP(vl,u,t,&s); u = s; - } - y[n] = u; - pt = (P *)ALLOCA((n+1)*sizeof(pointer)); MKBC(n,pt); - for ( i = 0, u = 0; i <= n; i++ ) { - MULP(vl,x[i],y[n-i],&t); MULP(vl,t,pt[i],&s); - ADDP(vl,u,s,&t); u = t; - } - *pr = u; - } else { - error("exponent too big"); - *pr = 0; - } - } -} - -void D_CHSGNP(p,pr) -P p,*pr; -{ - register DCP dc,dcr,dcr0; - P t; - - if ( !p ) - *pr = NULL; - else if ( NUM(p) ) { -#if defined(THINK_C) || defined(_PA_RISC1_1) || defined(__alpha) || defined(mips) -#ifdef FBASE - chsgnnum((Num)p,(Num *)pr); -#else - MQ mq; - - NEWMQ(mq); CONT(mq)=mod-CONT((MQ)p); *pr = (P)mq; -#endif -#else - CHSGNNUM(p,t); *pr = t; -#endif - } else { - for ( dcr0 = 0, dc = DC(p); dc; dc = NEXT(dc) ) { - NEXTDC(dcr0,dcr); CHSGNP(COEF(dc),&COEF(dcr)); DEG(dcr) = DEG(dc); - } - NEXT(dcr) = 0; MKP(VR(p),dcr0,*pr); - } -} - - -#ifdef FBASE void ptozp(p,sgn,c,pr) P p; int sgn; Q *c; P *pr; { - N nm,dn; + N nm,dn; - if ( !p ) { - *c = 0; *pr = 0; - } else { - lgp(p,&nm,&dn); - if ( UNIN(dn) ) - NTOQ(nm,sgn,*c); - else - NDTOQ(nm,dn,sgn,*c); - divcp(p,*c,pr); - } + if ( !p ) { + *c = 0; *pr = 0; + } else { + lgp(p,&nm,&dn); + if ( UNIN(dn) ) + NTOQ(nm,sgn,*c); + else + NDTOQ(nm,dn,sgn,*c); + divcp(p,*c,pr); + } } void lgp(p,g,l) P p; N *g,*l; { - N g1,g2,l1,l2,l3,l4,tmp; - DCP dc; + N g1,g2,l1,l2,l3,l4,tmp; + DCP dc; - if ( NUM(p) ) { - *g = NM((Q)p); - if ( INT((Q)p) ) - *l = ONEN; - else - *l = DN((Q)p); - } else { - dc = DC(p); lgp(COEF(dc),g,l); - for ( dc = NEXT(dc); dc; dc = NEXT(dc) ) { - lgp(COEF(dc),&g1,&l1); gcdn(*g,g1,&g2); *g = g2; - gcdn(*l,l1,&l2); kmuln(*l,l1,&l3); divn(l3,l2,&l4,&tmp); *l = l4; - } - } + if ( NUM(p) ) { + *g = NM((Q)p); + if ( INT((Q)p) ) + *l = ONEN; + else + *l = DN((Q)p); + } else { + dc = DC(p); lgp(COEF(dc),g,l); + for ( dc = NEXT(dc); dc; dc = NEXT(dc) ) { + lgp(COEF(dc),&g1,&l1); gcdn(*g,g1,&g2); *g = g2; + gcdn(*l,l1,&l2); kmuln(*l,l1,&l3); divn(l3,l2,&l4,&tmp); *l = l4; + } + } } void divcp(f,q,rp) @@ -403,19 +103,19 @@ P f; Q q; P *rp; { - DCP dc,dcr,dcr0; + DCP dc,dcr,dcr0; - if ( !f ) - *rp = 0; - else if ( NUM(f) ) - DIVNUM(f,q,rp); - else { - for ( dc = DC(f), dcr0 = 0; dc; dc = NEXT(dc) ) { - NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc); - divcp(COEF(dc),q,&COEF(dcr)); - } - NEXT(dcr) = 0; MKP(VR(f),dcr0,*rp); - } + if ( !f ) + *rp = 0; + else if ( NUM(f) ) + DIVNUM(f,q,rp); + else { + for ( dc = DC(f), dcr0 = 0; dc; dc = NEXT(dc) ) { + NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc); + divcp(COEF(dc),q,&COEF(dcr)); + } + NEXT(dcr) = 0; MKP(VR(f),dcr0,*rp); + } } void diffp(vl,p,v,r) @@ -424,128 +124,204 @@ P p; V v; P *r; { - P t; - DCP dc,dcr,dcr0; + P t; + DCP dc,dcr,dcr0; - if ( !p || NUM(p) ) - *r = 0; - else { - if ( v == VR(p) ) { - for ( dc = DC(p), dcr0 = 0; - dc && DEG(dc); dc = NEXT(dc) ) { - MULPQ(COEF(dc),(P)DEG(dc),&t); - if ( t ) { - NEXTDC(dcr0,dcr); SUBQ(DEG(dc),ONE,&DEG(dcr)); - COEF(dcr) = t; - } - } - if ( !dcr0 ) - *r = 0; - else { - NEXT(dcr) = 0; MKP(v,dcr0,*r); - } - } else { - for ( dc = DC(p), dcr0 = 0; dc; dc = NEXT(dc) ) { - diffp(vl,COEF(dc),v,&t); - if ( t ) { - NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc); COEF(dcr) = t; - } - } - if ( !dcr0 ) - *r = 0; - else { - NEXT(dcr) = 0; MKP(VR(p),dcr0,*r); - } - } - } + if ( !p || NUM(p) ) + *r = 0; + else { + if ( v == VR(p) ) { + for ( dc = DC(p), dcr0 = 0; dc; dc = NEXT(dc) ) { + if ( !DEG(dc) ) continue; + MULPQ(COEF(dc),(P)DEG(dc),&t); + if ( t ) { + NEXTDC(dcr0,dcr); SUBQ(DEG(dc),ONE,&DEG(dcr)); + COEF(dcr) = t; + } + } + if ( !dcr0 ) + *r = 0; + else { + NEXT(dcr) = 0; MKP(v,dcr0,*r); + } + } else { + for ( dc = DC(p), dcr0 = 0; dc; dc = NEXT(dc) ) { + diffp(vl,COEF(dc),v,&t); + if ( t ) { + NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc); COEF(dcr) = t; + } + } + if ( !dcr0 ) + *r = 0; + else { + NEXT(dcr) = 0; MKP(VR(p),dcr0,*r); + } + } + } } +/* Euler derivation */ +void ediffp(vl,p,v,r) +VL vl; +P p; +V v; +P *r; +{ + P t; + DCP dc,dcr,dcr0; + + if ( !p || NUM(p) ) + *r = 0; + else { + if ( v == VR(p) ) { + for ( dc = DC(p), dcr0 = 0; dc; dc = NEXT(dc) ) { + if ( !DEG(dc) ) continue; + MULPQ(COEF(dc),(P)DEG(dc),&t); + if ( t ) { + NEXTDC(dcr0,dcr); + DEG(dcr) = DEG(dc); + COEF(dcr) = t; + } + } + if ( !dcr0 ) + *r = 0; + else { + NEXT(dcr) = 0; MKP(v,dcr0,*r); + } + } else { + for ( dc = DC(p), dcr0 = 0; dc; dc = NEXT(dc) ) { + ediffp(vl,COEF(dc),v,&t); + if ( t ) { + NEXTDC(dcr0,dcr); DEG(dcr) = DEG(dc); COEF(dcr) = t; + } + } + if ( !dcr0 ) + *r = 0; + else { + NEXT(dcr) = 0; MKP(VR(p),dcr0,*r); + } + } + } +} + void coefp(p,d,pr) P p; int d; P *pr; { - DCP dc; - int sgn; - Q dq; + DCP dc; + int sgn; + Q dq; - if ( NUM(p) ) - if ( d == 0 ) - *pr = p; - else - *pr = 0; - else { - for ( STOQ(d,dq), dc = DC(p); dc; dc = NEXT(dc) ) - if ( (sgn = cmpq(DEG(dc),dq)) > 0 ) - continue; - else if ( sgn == 0 ) { - *pr = COEF(dc); - return; - } else { - *pr = 0; - break; - } - *pr = 0; - } + if ( NUM(p) ) + if ( d == 0 ) + *pr = p; + else + *pr = 0; + else { + for ( STOQ(d,dq), dc = DC(p); dc; dc = NEXT(dc) ) + if ( (sgn = cmpq(DEG(dc),dq)) > 0 ) + continue; + else if ( sgn == 0 ) { + *pr = COEF(dc); + return; + } else { + *pr = 0; + break; + } + *pr = 0; + } } int compp(vl,p1,p2) VL vl; P p1,p2; { - DCP dc1,dc2; - V v1,v2; + DCP dc1,dc2; + V v1,v2; - if ( !p1 ) - return p2 ? -1 : 0; - else if ( !p2 ) - return 1; - else if ( NUM(p1) ) - return NUM(p2) ? (*cmpnumt[MAX(NID(p1),NID(p2))])(p1,p2) : -1; - else if ( NUM(p2) ) - return 1; - if ( (v1 = VR(p1)) == (v2 = VR(p2)) ) { - for ( dc1 = DC(p1), dc2 = DC(p2); - dc1 && dc2; dc1 = NEXT(dc1), dc2 = NEXT(dc2) ) - switch ( cmpq(DEG(dc1),DEG(dc2)) ) { - case 1: - return 1; break; - case -1: - return -1; break; - default: - switch ( compp(vl,COEF(dc1),COEF(dc2)) ) { - case 1: - return 1; break; - case -1: - return -1; break; - default: - break; - } - break; - } - return dc1 ? 1 : (dc2 ? -1 : 0); - } else { - for ( ; v1 != VR(vl) && v2 != VR(vl); vl = NEXT(vl) ); - return v1 == VR(vl) ? 1 : -1; - } + if ( !p1 ) + return p2 ? -1 : 0; + else if ( !p2 ) + return 1; + else if ( NUM(p1) ) + return NUM(p2) ? (*cmpnumt[MAX(NID(p1),NID(p2))])(p1,p2) : -1; + else if ( NUM(p2) ) + return 1; + if ( (v1 = VR(p1)) == (v2 = VR(p2)) ) { + for ( dc1 = DC(p1), dc2 = DC(p2); + dc1 && dc2; dc1 = NEXT(dc1), dc2 = NEXT(dc2) ) + switch ( cmpq(DEG(dc1),DEG(dc2)) ) { + case 1: + return 1; break; + case -1: + return -1; break; + default: + switch ( compp(vl,COEF(dc1),COEF(dc2)) ) { + case 1: + return 1; break; + case -1: + return -1; break; + default: + break; + } + break; + } + return dc1 ? 1 : (dc2 ? -1 : 0); + } else { + for ( ; v1 != VR(vl) && v2 != VR(vl); vl = NEXT(vl) ); + return v1 == VR(vl) ? 1 : -1; + } } +int equalp(vl,p1,p2) +VL vl; +P p1,p2; +{ + DCP dc1,dc2; + V v1,v2; + + if ( !p1 ) { + if ( !p2 ) return 1; + else return 0; + } + /* p1 != 0 */ + if ( !p2 ) return 0; + + /* p1 != 0, p2 != 0 */ + if ( NUM(p1) ) { + if ( !NUM(p2) ) return 0; + /* p1 and p2 are numbers */ + if ( NID((Num)p1) != NID((Num)p2) ) return 0; + if ( !(*cmpnumt[NID(p1),NID(p1)])(p1,p2) ) return 1; + return 0; + } + if ( VR(p1) != VR(p2) ) return 0; + for ( dc1 = DC(p1), dc2 = DC(p2); + dc1 && dc2; dc1 = NEXT(dc1), dc2 = NEXT(dc2) ) { + if ( cmpq(DEG(dc1),DEG(dc2)) ) return 0; + else if ( !equalp(vl,COEF(dc1),COEF(dc2)) ) return 0; + } + if ( dc1 || dc2 ) return 0; + else return 1; +} + void csump(vl,p,c) VL vl; P p; Q *c; { - DCP dc; - Q s,s1,s2; + DCP dc; + Q s,s1,s2; - if ( !p || NUM(p) ) - *c = (Q)p; - else { - for ( dc = DC(p), s = 0; dc; dc = NEXT(dc) ) { - csump(vl,COEF(dc),&s1); addq(s,s1,&s2); s = s2; - } - *c = s; - } + if ( !p || NUM(p) ) + *c = (Q)p; + else { + for ( dc = DC(p), s = 0; dc; dc = NEXT(dc) ) { + csump(vl,COEF(dc),&s1); addq(s,s1,&s2); s = s2; + } + *c = s; + } } void degp(v,p,d) @@ -553,20 +329,190 @@ V v; P p; Q *d; { - DCP dc; - Q m,m1; - - if ( !p || NUM(p) ) - *d = 0; - else if ( v == VR(p) ) - *d = DEG(DC(p)); - else { - for ( dc = DC(p), m = 0; dc; dc = NEXT(dc) ) { - degp(v,COEF(dc),&m1); - if ( cmpq(m,m1) < 0 ) - m = m1; - } - *d = m; - } + DCP dc; + Q m,m1; + + if ( !p || NUM(p) ) + *d = 0; + else if ( v == VR(p) ) + *d = DEG(DC(p)); + else { + for ( dc = DC(p), m = 0; dc; dc = NEXT(dc) ) { + degp(v,COEF(dc),&m1); + if ( cmpq(m,m1) < 0 ) + m = m1; + } + *d = m; + } } -#endif + +void mulpc_trunc(VL vl,P p,P c,VN vn,P *pr); +void mulpq_trunc(P p,Q q,VN vn,P *pr); +void mulp_trunc(VL vl,P p1,P p2,VN vn,P *pr); + +void mulp_trunc(VL vl,P p1,P p2,VN vn,P *pr) +{ + register DCP dc,dct,dcr,dcr0; + V v1,v2; + P t,s,u; + int n1,n2,i,d,d1; + + if ( !p1 || !p2 ) *pr = 0; + else if ( NUM(p1) ) + mulpq_trunc(p2,(Q)p1,vn,pr); + else if ( NUM(p2) ) + mulpq_trunc(p1,(Q)p2,vn,pr); + else if ( ( v1 = VR(p1) ) == ( v2 = VR(p2) ) ) { + for ( ; vn->v && vn->v != v1; vn++ ) + if ( vn->n ) { + /* p1,p2 do not contain vn->v */ + *pr = 0; + return; + } + if ( !vn->v ) + error("mulp_trunc : invalid vn"); + d = vn->n; + for ( dc = DC(p2), s = 0; dc; dc = NEXT(dc) ) { + for ( dcr0 = 0, dct = DC(p1); dct; dct = NEXT(dct) ) { + d1 = QTOS(DEG(dct))+QTOS(DEG(dc)); + if ( d1 >= d ) { + mulp_trunc(vl,COEF(dct),COEF(dc),vn+1,&t); + if ( t ) { + NEXTDC(dcr0,dcr); + STOQ(d1,DEG(dcr)); + COEF(dcr) = t; + } + } + } + if ( dcr0 ) { + NEXT(dcr) = 0; MKP(v1,dcr0,t); + addp(vl,s,t,&u); s = u; t = u = 0; + } + } + *pr = s; + } else { + while ( v1 != VR(vl) && v2 != VR(vl) ) + vl = NEXT(vl); + if ( v1 == VR(vl) ) + mulpc_trunc(vl,p1,p2,vn,pr); + else + mulpc_trunc(vl,p2,p1,vn,pr); + } +} + +void mulpq_trunc(P p,Q q,VN vn,P *pr) +{ + DCP dc,dcr,dcr0; + P t; + int i,d; + V v; + + if (!p || !q) + *pr = 0; + else if ( NUM(p) ) { + for ( ; vn->v; vn++ ) + if ( vn->n ) { + *pr = 0; + return; + } + MULNUM(p,q,pr); + } else { + v = VR(p); + for ( ; vn->v && vn->v != v; vn++ ) { + if ( vn->n ) { + /* p does not contain vn->v */ + *pr = 0; + return; + } + } + if ( !vn->v ) + error("mulpq_trunc : invalid vn"); + d = vn->n; + for ( dcr0 = 0, dc = DC(p); dc && QTOS(DEG(dc)) >= d; dc = NEXT(dc) ) { + mulpq_trunc(COEF(dc),q,vn+1,&t); + if ( t ) { + NEXTDC(dcr0,dcr); COEF(dcr) = t; DEG(dcr) = DEG(dc); + } + } + if ( dcr0 ) { + NEXT(dcr) = 0; MKP(VR(p),dcr0,*pr); + } else + *pr = 0; + } +} + +void mulpc_trunc(VL vl,P p,P c,VN vn,P *pr) +{ + DCP dc,dcr,dcr0; + P t; + V v; + int i,d; + + if ( NUM(c) ) + mulpq_trunc(p,(Q)c,vn,pr); + else { + v = VR(p); + for ( ; vn->v && vn->v != v; vn++ ) + if ( vn->n ) { + /* p,c do not contain vn->v */ + *pr = 0; + return; + } + if ( !vn->v ) + error("mulpc_trunc : invalid vn"); + d = vn->n; + for ( dcr0 = 0, dc = DC(p); dc && QTOS(DEG(dc)) >= d; dc = NEXT(dc) ) { + mulp_trunc(vl,COEF(dc),c,vn+1,&t); + if ( t ) { + NEXTDC(dcr0,dcr); COEF(dcr) = t; DEG(dcr) = DEG(dc); + } + } + if ( dcr0 ) { + NEXT(dcr) = 0; MKP(VR(p),dcr0,*pr); + } else + *pr = 0; + } +} + +void quop_trunc(VL vl,P p1,P p2,VN vn,P *pr) +{ + DCP dc,dcq0,dcq; + P t,s,m,lc2,qt; + V v1,v2; + Q d2; + VN vn1; + + if ( !p1 ) + *pr = 0; + else if ( NUM(p2) ) + divsp(vl,p1,p2,pr); + else if ( (v1 = VR(p1)) != (v2 = VR(p2)) ) { + for ( dcq0 = 0, dc = DC(p1); dc; dc = NEXT(dc) ) { + NEXTDC(dcq0,dcq); + DEG(dcq) = DEG(dc); + quop_trunc(vl,COEF(dc),p2,vn,&COEF(dcq)); + } + NEXT(dcq) = 0; + MKP(v1,dcq0,*pr); + } else { + d2 = DEG(DC(p2)); + lc2 = COEF(DC(p2)); + t = p1; + dcq0 = 0; + /* vn1 = degree list of LC(p2) */ + for ( vn1 = vn; vn1->v != v1; vn1++ ); + vn1++; + while ( t ) { + dc = DC(t); + NEXTDC(dcq0,dcq); + subq(DEG(dc),d2,&DEG(dcq)); + quop_trunc(vl,COEF(dc),lc2,vn1,&COEF(dcq)); + NEXT(dcq) = 0; + MKP(v1,dcq,qt); + mulp_trunc(vl,p2,qt,vn,&m); + subp(vl,t,m,&s); t = s; + } + NEXT(dcq) = 0; + MKP(v1,dcq0,*pr); + } +}