===================================================================
RCS file: /home/cvs/OpenXM_contrib2/asir2000/engine/A.c,v
retrieving revision 1.1
retrieving revision 1.6
diff -u -p -r1.1 -r1.6
--- OpenXM_contrib2/asir2000/engine/A.c	1999/12/03 07:39:07	1.1
+++ OpenXM_contrib2/asir2000/engine/A.c	2005/07/11 00:24:02	1.6
@@ -1,6 +1,56 @@
-/* $OpenXM: OpenXM/src/asir99/engine/A.c,v 1.1.1.1 1999/11/10 08:12:26 noro Exp $ */
+/*
+ * Copyright (c) 1994-2000 FUJITSU LABORATORIES LIMITED 
+ * All rights reserved.
+ * 
+ * FUJITSU LABORATORIES LIMITED ("FLL") hereby grants you a limited,
+ * non-exclusive and royalty-free license to use, copy, modify and
+ * redistribute, solely for non-commercial and non-profit purposes, the
+ * computer program, "Risa/Asir" ("SOFTWARE"), subject to the terms and
+ * conditions of this Agreement. For the avoidance of doubt, you acquire
+ * only a limited right to use the SOFTWARE hereunder, and FLL or any
+ * third party developer retains all rights, including but not limited to
+ * copyrights, in and to the SOFTWARE.
+ * 
+ * (1) FLL does not grant you a license in any way for commercial
+ * purposes. You may use the SOFTWARE only for non-commercial and
+ * non-profit purposes only, such as academic, research and internal
+ * business use.
+ * (2) The SOFTWARE is protected by the Copyright Law of Japan and
+ * international copyright treaties. If you make copies of the SOFTWARE,
+ * with or without modification, as permitted hereunder, you shall affix
+ * to all such copies of the SOFTWARE the above copyright notice.
+ * (3) An explicit reference to this SOFTWARE and its copyright owner
+ * 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@sec.flab.fujitsu.co.jp of the detailed specification
+ * for such modification or the source code of the modified part of the
+ * SOFTWARE.
+ * 
+ * THE SOFTWARE IS PROVIDED AS IS WITHOUT ANY WARRANTY OF ANY KIND. FLL
+ * MAKES ABSOLUTELY NO WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY, AND
+ * EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF THIRD PARTIES'
+ * RIGHTS. NO FLL DEALER, AGENT, EMPLOYEES IS AUTHORIZED TO MAKE ANY
+ * MODIFICATIONS, EXTENSIONS, OR ADDITIONS TO THIS WARRANTY.
+ * UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, TORT, CONTRACT,
+ * OR OTHERWISE, SHALL FLL BE LIABLE TO YOU OR ANY OTHER PERSON FOR ANY
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE OR CONSEQUENTIAL
+ * DAMAGES OF ANY CHARACTER, INCLUDING, WITHOUT LIMITATION, DAMAGES
+ * ARISING OUT OF OR RELATING TO THE SOFTWARE OR THIS AGREEMENT, DAMAGES
+ * FOR LOSS OF GOODWILL, WORK STOPPAGE, OR LOSS OF DATA, OR FOR ANY
+ * DAMAGES, EVEN IF FLL SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF
+ * SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. EVEN IF A PART
+ * OF THE SOFTWARE HAS BEEN DEVELOPED BY A THIRD PARTY, THE THIRD PARTY
+ * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
+ * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
+ *
+ * $OpenXM: OpenXM_contrib2/asir2000/engine/A.c,v 1.5 2001/10/09 01:36:09 noro Exp $ 
+*/
 #include "ca.h"
 
+int get_lprime();
+
 void pdiva(vl,p0,p1,p2,pr)
 VL vl;
 P p1,p2,p0;
@@ -221,9 +271,7 @@ P p,p0,*pr;
 	wt = W_UMALLOC(m+n); ws = W_UMALLOC(m+n);
 	wm = W_UMALLOC(m+n); 
 	for ( q = ONE, t = 0, c = 0, index = 0; ; ) {
-		mod = lprime[index++];
-		if ( !mod )
-			error("pinva : lprime[] exhausted.");
+		mod = get_lprime(index++);
 		if ( !rem(NM((Q)LC(p)),mod) || !rem(NM((Q)LC(p0)),mod) ) 
 			continue;
 		ptomp(mod,p,&tg); ptomp(mod,p0,&th); srchump(mod,tg,th,&tr);
@@ -250,4 +298,65 @@ P p,p0,*pr;
 			break;
 	}
 	ptozp(c,1,&s,pr); 
+}
+
+/* 
+ * compute g s.t. h*p0+g*p = res(v,p0,p)
+ */
+
+void inva_chrem(P p0, P p, NODE *pr)
+{
+	V v;
+	Q f,q,q1;
+	Q u,t,a,b,s,dn;
+	P c,c0,c1;
+	P tg,th,tr;
+	P z,zz,zzz;
+	UM wg,wh,ws,wt,wm;
+	int n,m,modres,mod,index,i;
+
+	v = VR(p); n=deg(v,p); m=deg(v,p0);
+	norm(p,&a); norm(p0,&b);
+	STOQ(m,u); pwrq(a,u,&t); STOQ(n,u); pwrq(b,u,&s); 
+	mulq(t,s,&u); 
+	factorial(n+m,&t); mulq(u,t,&s); addq(s,s,&f); 
+	wg = W_UMALLOC(m+n); wh = W_UMALLOC(m+n);
+	wt = W_UMALLOC(m+n); ws = W_UMALLOC(m+n);
+	wm = W_UMALLOC(m+n); 
+	for ( q = ONE, t = 0, c = 0, index = 0; ; ) {
+		mod = get_lprime(index++);
+		if ( !rem(NM((Q)LC(p)),mod) || !rem(NM((Q)LC(p0)),mod) ) 
+			continue;
+		ptomp(mod,p,&tg); ptomp(mod,p0,&th); srchump(mod,tg,th,&tr);
+		if ( !tr )
+			continue;
+		else
+			modres = CONT((MQ)tr);
+		mptoum(tg,wg); mptoum(th,wh); 
+		eucum(mod,wg,wh,ws,wt); /* wg * ws + wh * wt = 1 */
+		DEG(wm) = 0; COEF(wm)[0] = modres;
+		mulum(mod,ws,wm,wt);
+		for ( i = DEG(wt); i >= 0; i-- ) 
+			if ( ( COEF(wt)[i] * 2 ) > mod ) 
+				COEF(wt)[i] -= mod;
+		chnrem(mod,v,c,q,wt,&c1,&q1); 
+		if ( !ucmpp(c,c1) ) {
+			mulp(CO,c,p,&z); divsrp(CO,z,p0,&zz,&zzz);
+			if ( NUM(zzz) ) {
+				q = (Q)zzz; break;
+			}
+		}
+		q = q1; c = c1;
+		if ( cmpq(f,q) < 0 ) {
+			mulp(CO,c,p,&z); divsrp(CO,z,p0,&zz,&zzz);
+			q = (Q)zzz;
+			break;
+		}
+	}
+	/* c*p = q mod p0 */
+	/* c = s*c0 */
+	ptozp(c,1,&s,&c0); 
+	/* c/q = c0/(q/s) */
+	divq(q,s,&dn);
+	*pr = (NODE)mknode(2,c0,dn);
 }