===================================================================
RCS file: /home/cvs/OpenXM_contrib2/asir2000/builtin/dp-supp.c,v
retrieving revision 1.20
retrieving revision 1.23
diff -u -p -r1.20 -r1.23
--- OpenXM_contrib2/asir2000/builtin/dp-supp.c	2001/10/09 01:36:05	1.20
+++ OpenXM_contrib2/asir2000/builtin/dp-supp.c	2003/01/04 09:06:15	1.23
@@ -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/builtin/dp-supp.c,v 1.19 2001/09/19 09:10:34 noro Exp $ 
+ * $OpenXM: OpenXM_contrib2/asir2000/builtin/dp-supp.c,v 1.22 2002/12/27 07:37:57 noro Exp $ 
 */
 #include "ca.h"
 #include "base.h"
@@ -162,7 +162,8 @@ void dp_mbase(NODE hlist,NODE *mbase)
 	while ( 1 ) {
 		insert_to_node(d,mbase,nvar);
 		for ( i = nvar-1; i >= 0; ) {
-			d->d[i]++; d->td++;
+			d->d[i]++;
+			d->td += MUL_WEIGHT(1,i);
 			for ( j = 0; j < n; j++ ) {
 				if ( _dl_redble(dl[j],d,nvar) )
 					break;
@@ -171,7 +172,7 @@ void dp_mbase(NODE hlist,NODE *mbase)
 				for ( j = nvar-1; j >= i; j-- )
 					d->d[j] = 0;
 				for ( j = 0, td = 0; j < i; j++ )
-					td += d->d[j];
+					td += MUL_WEIGHT(d->d[j],j);
 				d->td = td;
 				i--;
 			} else
@@ -370,6 +371,22 @@ void dp_ptozp2_d(DP p0,DP p1,DP *hp,DP *rp)
 	*hp = h; *rp = r;
 }
 
+int have_sf_coef(P p)
+{
+	DCP dc;
+
+	if ( !p )
+		return 0;
+	else if ( NUM(p) )
+		return NID((Num)p) == N_GFS ? 1 : 0;
+	else {
+		for ( dc = DC(p); dc; dc = NEXT(dc) )
+			if ( have_sf_coef(COEF(dc)) )
+				return 1;
+		return 0;
+	}
+}
+
 void dp_prim(DP p,DP *rp)
 {
 	P t,g;
@@ -382,7 +399,29 @@ void dp_prim(DP p,DP *rp)
 
 	if ( !p )
 		*rp = 0;
-	else if ( dp_fcoeffs )
+	else if ( dp_fcoeffs == N_GFS ) {
+		for ( m = BDY(p); m; m = NEXT(m) )
+			if ( OID(m->c) == O_N ) {
+				/* GCD of coeffs = 1 */
+				*rp = p;
+				return;
+			} else break;
+		/* compute GCD over the finite fieid */
+		for ( m = BDY(p), n = 0; m; m = NEXT(m), n++ );
+		w = (P *)ALLOCA(n*sizeof(P));
+		for ( m = BDY(p), i = 0; i < n; m = NEXT(m), i++ )
+			w[i] = m->c;
+		gcdsf(CO,w,n,&g);
+		if ( NUM(g) )
+			*rp = p;
+		else {
+			for ( mr0 = 0, m = BDY(p); m; m = NEXT(m) ) {
+				NEXTMP(mr0,mr); divsp(CO,m->c,g,&mr->c); mr->dl = m->dl;
+			}
+			NEXT(mr) = 0; MKDP(p->nv,mr0,*rp); (*rp)->sugar = p->sugar;
+		}
+		return;
+	} else if ( dp_fcoeffs )
 		*rp = p;
 	else if ( NoGCD )
 		dp_ptozp(p,rp);
@@ -500,7 +539,7 @@ void dp_sp(DP p1,DP p2,DP *rp)
 	n = p1->nv; d1 = BDY(p1)->dl; d2 = BDY(p2)->dl;
 	w = (int *)ALLOCA(n*sizeof(int));
 	for ( i = 0, td = 0; i < n; i++ ) {
-		w[i] = MAX(d1->d[i],d2->d[i]); td += w[i];
+		w[i] = MAX(d1->d[i],d2->d[i]); td += MUL_WEIGHT(w[i],i);
 	}
 
 	NEWDL(d,n); d->td = td - d1->td;
@@ -553,7 +592,7 @@ void _dp_sp_dup(DP p1,DP p2,DP *rp)
 	n = p1->nv; d1 = BDY(p1)->dl; d2 = BDY(p2)->dl;
 	w = (int *)ALLOCA(n*sizeof(int));
 	for ( i = 0, td = 0; i < n; i++ ) {
-		w[i] = MAX(d1->d[i],d2->d[i]); td += w[i];
+		w[i] = MAX(d1->d[i],d2->d[i]); td += MUL_WEIGHT(w[i],i);
 	}
 
 	_NEWDL(d,n); d->td = td - d1->td;
@@ -604,7 +643,7 @@ void dp_sp_mod(DP p1,DP p2,int mod,DP *rp)
 	n = p1->nv; d1 = BDY(p1)->dl; d2 = BDY(p2)->dl;
 	w = (int *)ALLOCA(n*sizeof(int));
 	for ( i = 0, td = 0; i < n; i++ ) {
-		w[i] = MAX(d1->d[i],d2->d[i]); td += w[i];
+		w[i] = MAX(d1->d[i],d2->d[i]); td += MUL_WEIGHT(w[i],i);
 	}
 	NEWDL_NOINIT(d,n); d->td = td - d1->td;
 	for ( i = 0; i < n; i++ )
@@ -630,7 +669,7 @@ void _dp_sp_mod_dup(DP p1,DP p2,int mod,DP *rp)
 	n = p1->nv; d1 = BDY(p1)->dl; d2 = BDY(p2)->dl;
 	w = (int *)ALLOCA(n*sizeof(int));
 	for ( i = 0, td = 0; i < n; i++ ) {
-		w[i] = MAX(d1->d[i],d2->d[i]); td += w[i];
+		w[i] = MAX(d1->d[i],d2->d[i]); td += MUL_WEIGHT(w[i],i);
 	}
 	_NEWDL(d,n); d->td = td - d1->td;
 	for ( i = 0; i < n; i++ )
@@ -656,7 +695,7 @@ void _dp_sp_mod(DP p1,DP p2,int mod,DP *rp)
 	n = p1->nv; d1 = BDY(p1)->dl; d2 = BDY(p2)->dl;
 	w = (int *)ALLOCA(n*sizeof(int));
 	for ( i = 0, td = 0; i < n; i++ ) {
-		w[i] = MAX(d1->d[i],d2->d[i]); td += w[i];
+		w[i] = MAX(d1->d[i],d2->d[i]); td += MUL_WEIGHT(w[i],i);
 	}
 	NEWDL(d,n); d->td = td - d1->td;
 	for ( i = 0; i < n; i++ )
@@ -687,13 +726,18 @@ void dp_red(DP p0,DP p1,DP p2,DP *head,DP *rest,P *dnp
 	Q c,c1,c2;
 	N gn,tn;
 	P g,a;
+	P p[2];
 
 	n = p1->nv; d1 = BDY(p1)->dl; d2 = BDY(p2)->dl;
 	NEWDL(d,n); d->td = d1->td - d2->td;
 	for ( i = 0; i < n; i++ )
 		d->d[i] = d1->d[i]-d2->d[i];
 	c1 = (Q)BDY(p1)->c; c2 = (Q)BDY(p2)->c;
-	if ( dp_fcoeffs ) {
+	if ( dp_fcoeffs == N_GFS ) {
+		p[0] = (P)c1; p[1] = (P)c2;
+		gcdsf(CO,p,2,&g);
+		divsp(CO,(P)c1,g,&a); c1 = (Q)a; divsp(CO,(P)c2,g,&a); c2 = (Q)a;
+	} else if ( dp_fcoeffs ) {
 		/* do nothing */
 	} else if ( INT(c1) && INT(c2) ) {
 		gcdn(NM(c1),NM(c2),&gn);
@@ -1537,12 +1581,14 @@ void dp_rest(DP p,DP *rp)
 
 DL lcm_of_DL(int nv,DL dl1,DL dl2,DL dl)
 {
-	register int n, *d1, *d2, *d, td;
+	register int i, *d1, *d2, *d, td;
 
 	if ( !dl ) NEWDL(dl,nv);
 	d = dl->d,  d1 = dl1->d,  d2 = dl2->d;
-	for ( td = 0, n = nv; --n >= 0; d1++, d2++, d++ )
-		td += (*d = *d1 > *d2 ? *d1 : *d2 );
+	for ( td = 0, i = 0; i < nv; d1++, d2++, d++, i++ ) {
+		*d = *d1 > *d2 ? *d1 : *d2;
+		td += MUL_WEIGHT(*d,i);
+	}
 	dl->td = td;
 	return dl;
 }