version 1.15, 2001/08/02 03:59:15 |
version 1.35, 2020/10/04 03:14:08 |
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/* $OpenXM: OpenXM_contrib2/asir2000/engine/Hgfs.c,v 1.14 2001/07/03 01:41:25 noro Exp $ */ |
/* $OpenXM: OpenXM_contrib2/asir2000/engine/Hgfs.c,v 1.34 2018/03/29 01:32:51 noro Exp $ */ |
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#include "ca.h" |
#include "ca.h" |
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#include "inline.h" |
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struct p_pair { |
int debug_sfbfctr; |
UM p0; |
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UM p1; |
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struct p_pair *next; |
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}; |
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void canzassf(UM,int,UM *); |
void lnfsf(int n,UM p0,UM p1,struct p_pair *list,UM np0,UM np1); |
void lnfsf(int,UM,UM,struct p_pair *,UM,UM); |
void extractcoefbm(BM f,int dx,UM r); |
void minipolysf(UM,UM,UM); |
void sqfrsf(VL vl, P f, DCP *dcp); |
void czsfum(UM,UM *); |
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void gensqfrsfum(UM,DUM); |
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void sfbmtop(BM,V,V,P *); |
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void cont_pp_sfp(VL,P,P *,P *); |
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void sfcsump(VL,P,P *); |
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void mulsfbmarray(int,BM,ML,int,int *,V,V,P *); |
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void const_term(P,UM); |
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void sfbsqfr(P,V,V,DCP *); |
int comp_dum(DUM a,DUM b) |
void sfusqfr(P,DCP *); |
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int comp_dum(a,b) |
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DUM a,b; |
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{ |
{ |
if ( DEG(a->f) > DEG(b->f) ) |
if ( DEG(a->f) > DEG(b->f) ) |
return -1; |
return -1; |
else if ( DEG(a->f) < DEG(b->f) ) |
else if ( DEG(a->f) < DEG(b->f) ) |
return 1; |
return 1; |
else |
else |
return 0; |
return 0; |
} |
} |
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void fctrsf(p,dcp) |
void ufctrsf(P p,DCP *dcp) |
P p; |
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DCP *dcp; |
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{ |
{ |
int n,i,j,k; |
int n,i,j,k; |
DCP dc,dc0; |
DCP dc,dc0; |
P lc; |
P lc; |
P zp; |
UM mp; |
UM mp; |
UM *tl; |
UM *tl; |
Obj obj; |
struct oDUM *udc,*udc1; |
struct oDUM *udc,*udc1; |
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simp_ff(p,&zp); p = zp; |
simp_ff((Obj)p,&obj); p = (P)obj; |
if ( !p ) { |
if ( !p ) { |
*dcp = 0; return; |
NEWDC(dc); COEF(dc) = 0; DEG(dc) = ONE; |
} |
NEXT(dc) = 0; *dcp = dc; |
mp = W_UMALLOC(UDEG(p)); |
return; |
ptosfum(p,mp); |
} |
if ( (n = DEG(mp)) < 0 ) { |
mp = W_UMALLOC(UDEG(p)); |
*dcp = 0; return; |
ptosfum(p,mp); |
} else if ( n == 0 ) { |
if ( (n = DEG(mp)) < 0 ) { |
NEWDC(dc); COEF(dc) = p; DEG(dc) = ONE; |
*dcp = 0; return; |
NEXT(dc) = 0; *dcp = dc; |
} else if ( n == 0 ) { |
return; |
NEWDC(dc); COEF(dc) = p; DEG(dc) = ONE; |
} |
NEXT(dc) = 0; *dcp = dc; |
lc = COEF(DC(p)); |
return; |
if ( !_isonesf(COEF(mp)[n]) ) { |
} |
monicsfum(mp); |
lc = COEF(DC(p)); |
} |
if ( !_isonesf(COEF(mp)[n]) ) { |
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monicsfum(mp); |
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} |
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W_CALLOC(n+1,struct oDUM,udc); |
W_CALLOC(n+1,struct oDUM,udc); |
gensqfrsfum(mp,udc); |
gensqfrsfum(mp,udc); |
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tl = (UM *)ALLOCA((n+1)*sizeof(UM)); |
tl = (UM *)ALLOCA((n+1)*sizeof(UM)); |
W_CALLOC(DEG(mp)+1,struct oDUM,udc1); |
W_CALLOC(DEG(mp)+1,struct oDUM,udc1); |
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for ( i = 0,j = 0; udc[i].f; i++ ) |
for ( i = 0,j = 0; udc[i].f; i++ ) |
if ( DEG(udc[i].f) == 1 ) { |
if ( DEG(udc[i].f) == 1 ) { |
udc1[j].f = udc[i].f; udc1[j].n = udc[i].n; j++; |
udc1[j].f = udc[i].f; udc1[j].n = udc[i].n; j++; |
} else { |
} else { |
bzero((char *)tl,(n+1)*sizeof(UM)); |
bzero((char *)tl,(n+1)*sizeof(UM)); |
czsfum(udc[i].f,tl); |
czsfum(udc[i].f,tl); |
for ( k = 0; tl[k]; k++, j++ ) { |
for ( k = 0; tl[k]; k++, j++ ) { |
udc1[j].f = tl[k]; udc1[j].n = udc[i].n; |
udc1[j].f = tl[k]; udc1[j].n = udc[i].n; |
} |
} |
} |
} |
udc = udc1; |
udc = udc1; |
for ( i = 0; udc[i].f; i++ ); |
for ( i = 0; udc[i].f; i++ ); |
qsort(udc,i,sizeof(struct oDUM), |
qsort(udc,i,sizeof(struct oDUM), |
(int (*)(const void *,const void *))comp_dum); |
(int (*)(const void *,const void *))comp_dum); |
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NEWDC(dc0); COEF(dc0) = lc; DEG(dc0) = ONE; dc = dc0; |
NEWDC(dc0); COEF(dc0) = lc; DEG(dc0) = ONE; dc = dc0; |
for ( n = 0; udc[n].f; n++ ) { |
for ( n = 0; udc[n].f; n++ ) { |
NEWDC(NEXT(dc)); dc = NEXT(dc); |
NEWDC(NEXT(dc)); dc = NEXT(dc); |
STOQ(udc[n].n,DEG(dc)); sfumtop(VR(p),udc[n].f,&COEF(dc)); |
STOQ(udc[n].n,DEG(dc)); sfumtop(VR(p),udc[n].f,&COEF(dc)); |
} |
} |
NEXT(dc) = 0; *dcp = dc0; |
NEXT(dc) = 0; *dcp = dc0; |
} |
} |
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void gensqfrsfum(p,dc) |
void gensqfrsfum(UM p,struct oDUM *dc) |
UM p; |
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struct oDUM *dc; |
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{ |
{ |
int n,i,j,d,mod; |
int n,i,j,d,mod; |
UM t,s,g,f,f1,b; |
UM t,s,g,f,f1,b; |
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GFS u,v; |
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if ( (n = DEG(p)) == 1 ) { |
if ( (n = DEG(p)) == 1 ) { |
dc[0].f = UMALLOC(DEG(p)); cpyum(p,dc[0].f); dc[0].n = 1; |
dc[0].f = UMALLOC(DEG(p)); cpyum(p,dc[0].f); dc[0].n = 1; |
return; |
return; |
} |
} |
t = W_UMALLOC(n); s = W_UMALLOC(n); g = W_UMALLOC(n); |
t = W_UMALLOC(n); s = W_UMALLOC(n); g = W_UMALLOC(n); |
f = W_UMALLOC(n); f1 = W_UMALLOC(n); b = W_UMALLOC(n); |
f = W_UMALLOC(n); f1 = W_UMALLOC(n); b = W_UMALLOC(n); |
diffsfum(p,t); cpyum(p,s); gcdsfum(t,s,g); |
diffsfum(p,t); cpyum(p,s); gcdsfum(t,s,g); |
if ( !DEG(g) ) { |
if ( !DEG(g) ) { |
dc[0].f = UMALLOC(DEG(p)); cpyum(p,dc[0].f); dc[0].n = 1; |
dc[0].f = UMALLOC(DEG(p)); cpyum(p,dc[0].f); dc[0].n = 1; |
return; |
return; |
} |
} |
cpyum(p,b); cpyum(p,t); divsfum(t,g,f); |
cpyum(p,b); cpyum(p,t); divsfum(t,g,f); |
for ( i = 0, d = 0; DEG(f); i++ ) { |
for ( i = 0, d = 0; DEG(f); i++ ) { |
while ( 1 ) { |
while ( 1 ) { |
cpyum(b,t); |
cpyum(b,t); |
if ( divsfum(t,f,s) >= 0 ) |
if ( divsfum(t,f,s) >= 0 ) |
break; |
break; |
else { |
else { |
cpyum(s,b); d++; |
cpyum(s,b); d++; |
} |
} |
} |
} |
cpyum(b,t); cpyum(f,s); gcdsfum(t,s,f1); |
cpyum(b,t); cpyum(f,s); gcdsfum(t,s,f1); |
divsfum(f,f1,s); cpyum(f1,f); |
divsfum(f,f1,s); cpyum(f1,f); |
dc[i].f = UMALLOC(DEG(s)); cpyum(s,dc[i].f); dc[i].n = d; |
dc[i].f = UMALLOC(DEG(s)); cpyum(s,dc[i].f); dc[i].n = d; |
} |
} |
mod = characteristic_sf(); |
mod = characteristic_sf(); |
if ( DEG(b) > 0 ) { |
if ( DEG(b) > 0 ) { |
d = 1; |
d = 1; |
while ( 1 ) { |
while ( 1 ) { |
cpyum(b,t); |
cpyum(b,t); |
for ( j = DEG(t); j >= 0; j-- ) |
for ( j = DEG(t); j >= 0; j-- ) |
if ( COEF(t)[j] && (j % mod) ) |
if ( COEF(t)[j] && (j % mod) ) |
break; |
break; |
if ( j >= 0 ) |
if ( j >= 0 ) |
break; |
break; |
else { |
else { |
DEG(s) = DEG(t)/mod; |
DEG(s) = DEG(t)/mod; |
for ( j = 0; j <= DEG(t); j++ ) |
for ( j = 0; j <= DEG(t); j++ ) { |
COEF(s)[j] = COEF(t)[j*mod]; |
iftogfs(COEF(t)[j*mod],&u); |
cpyum(s,b); d *= mod; |
pthrootgfs(u,&v); |
} |
COEF(s)[j] = v?FTOIF(CONT(v)):0; |
} |
} |
gensqfrsfum(b,dc+i); |
cpyum(s,b); d *= mod; |
for ( j = i; dc[j].f; j++ ) |
} |
dc[j].n *= d; |
} |
} |
gensqfrsfum(b,dc+i); |
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for ( j = i; dc[j].f; j++ ) |
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dc[j].n *= d; |
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} |
} |
} |
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void randsfum(d,p) |
void randsfum(int d,UM p) |
int d; |
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UM p; |
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{ |
{ |
int i; |
int i; |
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for ( i = 0; i < d; i++ ) |
for ( i = 0; i < d; i++ ) |
COEF(p)[i] = _randomsf(); |
COEF(p)[i] = _randomsf(); |
for ( i = d-1; i >= 0 && !COEF(p)[i]; i-- ); |
for ( i = d-1; i >= 0 && !COEF(p)[i]; i-- ); |
p->d = i; |
p->d = i; |
} |
} |
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void pwrmodsfum(p,e,f,pr) |
void pwrmodsfum(UM p,int e,UM f,UM pr) |
int e; |
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UM p,f,pr; |
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{ |
{ |
UM wt,ws,q; |
UM wt,ws,q; |
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if ( e == 0 ) { |
if ( e == 0 ) { |
DEG(pr) = 0; COEF(pr)[0] = _onesf(); |
DEG(pr) = 0; COEF(pr)[0] = _onesf(); |
} else if ( DEG(p) < 0 ) |
} else if ( DEG(p) < 0 ) |
DEG(pr) = -1; |
DEG(pr) = -1; |
else if ( e == 1 ) { |
else if ( e == 1 ) { |
q = W_UMALLOC(DEG(p)); cpyum(p,pr); |
q = W_UMALLOC(DEG(p)); cpyum(p,pr); |
DEG(pr) = divsfum(pr,f,q); |
DEG(pr) = divsfum(pr,f,q); |
} else if ( DEG(p) == 0 ) { |
} else if ( DEG(p) == 0 ) { |
DEG(pr) = 0; COEF(pr)[0] = _pwrsf(COEF(p)[0],e); |
DEG(pr) = 0; COEF(pr)[0] = _pwrsf(COEF(p)[0],e); |
} else { |
} else { |
wt = W_UMALLOC(2*DEG(f)); ws = W_UMALLOC(2*DEG(f)); |
wt = W_UMALLOC(2*DEG(f)); ws = W_UMALLOC(2*DEG(f)); |
q = W_UMALLOC(2*DEG(f)); |
q = W_UMALLOC(2*DEG(f)); |
pwrmodsfum(p,e/2,f,wt); |
pwrmodsfum(p,e/2,f,wt); |
if ( !(e%2) ) { |
if ( !(e%2) ) { |
mulsfum(wt,wt,pr); DEG(pr) = divsfum(pr,f,q); |
mulsfum(wt,wt,pr); DEG(pr) = divsfum(pr,f,q); |
} else { |
} else { |
mulsfum(wt,wt,ws); |
mulsfum(wt,wt,ws); |
DEG(ws) = divsfum(ws,f,q); |
DEG(ws) = divsfum(ws,f,q); |
mulsfum(ws,p,pr); |
mulsfum(ws,p,pr); |
DEG(pr) = divsfum(pr,f,q); |
DEG(pr) = divsfum(pr,f,q); |
} |
} |
} |
} |
} |
} |
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void spwrsfum(m,f,e,r) |
void spwrsfum(UM m,UM f,N e,UM r) |
UM f,m,r; |
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N e; |
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{ |
{ |
UM t,s,q; |
UM t,s,q; |
N e1; |
N e1; |
int a; |
int a; |
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if ( !e ) { |
if ( !e ) { |
DEG(r) = 0; COEF(r)[0] = _onesf(); |
DEG(r) = 0; COEF(r)[0] = _onesf(); |
} else if ( UNIN(e) ) |
} else if ( UNIN(e) ) |
cpyum(f,r); |
cpyum(f,r); |
else { |
else { |
a = divin(e,2,&e1); |
a = divin(e,2,&e1); |
t = W_UMALLOC(2*DEG(m)); spwrsfum(m,f,e1,t); |
t = W_UMALLOC(2*DEG(m)); spwrsfum(m,f,e1,t); |
s = W_UMALLOC(2*DEG(m)); q = W_UMALLOC(2*DEG(m)); |
s = W_UMALLOC(2*DEG(m)); q = W_UMALLOC(2*DEG(m)); |
mulsfum(t,t,s); DEG(s) = divsfum(s,m,q); |
mulsfum(t,t,s); DEG(s) = divsfum(s,m,q); |
if ( a ) { |
if ( a ) { |
mulsfum(s,f,t); DEG(t) = divsfum(t,m,q); cpyum(t,r); |
mulsfum(s,f,t); DEG(t) = divsfum(t,m,q); cpyum(t,r); |
} else |
} else |
cpyum(s,r); |
cpyum(s,r); |
} |
} |
} |
} |
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void tracemodsfum(m,f,e,r) |
void tracemodsfum(UM m,UM f,int e,UM r) |
UM f,m,r; |
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int e; |
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{ |
{ |
UM t,s,q,u; |
UM t,s,q,u; |
int i; |
int i; |
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q = W_UMALLOC(2*DEG(m)+DEG(f)); /* XXX */ |
q = W_UMALLOC(2*DEG(m)+DEG(f)); /* XXX */ |
t = W_UMALLOC(2*DEG(m)); |
t = W_UMALLOC(2*DEG(m)); |
s = W_UMALLOC(2*DEG(m)); |
s = W_UMALLOC(2*DEG(m)); |
u = W_UMALLOC(2*DEG(m)); |
u = W_UMALLOC(2*DEG(m)); |
DEG(f) = divsfum(f,m,q); |
DEG(f) = divsfum(f,m,q); |
cpyum(f,s); |
cpyum(f,s); |
cpyum(f,t); |
cpyum(f,t); |
for ( i = 1; i < e; i++ ) { |
for ( i = 1; i < e; i++ ) { |
mulsfum(t,t,u); |
mulsfum(t,t,u); |
DEG(u) = divsfum(u,m,q); cpyum(u,t); |
DEG(u) = divsfum(u,m,q); cpyum(u,t); |
addsfum(t,s,u); cpyum(u,s); |
addsfum(t,s,u); cpyum(u,s); |
} |
} |
cpyum(s,r); |
cpyum(s,r); |
} |
} |
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void make_qmatsf(p,tab,mp) |
void make_qmatsf(UM p,UM *tab,int ***mp) |
UM p; |
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UM *tab; |
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int ***mp; |
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{ |
{ |
int n,i,j; |
int n,i,j; |
int *c; |
int *c; |
UM q,r; |
UM q,r; |
int **mat; |
int **mat; |
int one; |
int one; |
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n = DEG(p); |
n = DEG(p); |
*mp = mat = almat(n,n); |
*mp = mat = almat(n,n); |
for ( j = 0; j < n; j++ ) { |
for ( j = 0; j < n; j++ ) { |
r = W_UMALLOC(DEG(tab[j])); q = W_UMALLOC(DEG(tab[j])); |
r = W_UMALLOC(DEG(tab[j])); q = W_UMALLOC(DEG(tab[j])); |
cpyum(tab[j],r); DEG(r) = divsfum(r,p,q); |
cpyum(tab[j],r); DEG(r) = divsfum(r,p,q); |
for ( i = 0, c = COEF(r); i <= DEG(r); i++ ) |
for ( i = 0, c = COEF(r); i <= DEG(r); i++ ) |
mat[i][j] = c[i]; |
mat[i][j] = c[i]; |
} |
} |
one = _onesf(); |
one = _onesf(); |
for ( i = 0; i < n; i++ ) |
for ( i = 0; i < n; i++ ) |
mat[i][i] = _subsf(mat[i][i],one); |
mat[i][i] = _subsf(mat[i][i],one); |
} |
} |
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void nullsf(mat,n,ind) |
void nullsf(int **mat,int n,int *ind) |
int **mat; |
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int *ind; |
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int n; |
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{ |
{ |
int i,j,l,s,h,inv; |
int i,j,l,s,h,inv; |
int *t,*u; |
int *t,*u; |
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bzero((char *)ind,n*sizeof(int)); |
bzero((char *)ind,n*sizeof(int)); |
ind[0] = 0; |
ind[0] = 0; |
for ( i = j = 0; j < n; i++, j++ ) { |
for ( i = j = 0; j < n; i++, j++ ) { |
for ( ; j < n; j++ ) { |
for ( ; j < n; j++ ) { |
for ( l = i; l < n; l++ ) |
for ( l = i; l < n; l++ ) |
if ( mat[l][j] ) |
if ( mat[l][j] ) |
break; |
break; |
if ( l < n ) { |
if ( l < n ) { |
t = mat[i]; mat[i] = mat[l]; mat[l] = t; break; |
t = mat[i]; mat[i] = mat[l]; mat[l] = t; break; |
} else |
} else |
ind[j] = 1; |
ind[j] = 1; |
} |
} |
if ( j == n ) |
if ( j == n ) |
break; |
break; |
inv = _invsf(mat[i][j]); |
inv = _invsf(mat[i][j]); |
for ( s = j, t = mat[i]; s < n; s++ ) |
for ( s = j, t = mat[i]; s < n; s++ ) |
t[s] = _mulsf(t[s],inv); |
t[s] = _mulsf(t[s],inv); |
for ( l = 0; l < n; l++ ) { |
for ( l = 0; l < n; l++ ) { |
if ( l == i ) |
if ( l == i ) |
continue; |
continue; |
u = mat[l]; h = _chsgnsf(u[j]); |
u = mat[l]; h = _chsgnsf(u[j]); |
for ( s = j; s < n; s++ ) |
for ( s = j; s < n; s++ ) |
u[s] = _addsf(_mulsf(h,t[s]),u[s]); |
u[s] = _addsf(_mulsf(h,t[s]),u[s]); |
} |
} |
} |
} |
} |
} |
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void null_to_solsf(mat,ind,n,r) |
void null_to_solsf(int **mat,int *ind,int n,UM *r) |
int **mat; |
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int *ind; |
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int n; |
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UM *r; |
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{ |
{ |
int i,j,k,l; |
int i,j,k,l; |
int *c; |
int *c; |
UM w; |
UM w; |
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for ( i = 0, l = 0; i < n; i++ ) { |
for ( i = 0, l = 0; i < n; i++ ) { |
if ( !ind[i] ) |
if ( !ind[i] ) |
continue; |
continue; |
w = UMALLOC(n); |
w = UMALLOC(n); |
for ( j = k = 0, c = COEF(w); j < n; j++ ) |
for ( j = k = 0, c = COEF(w); j < n; j++ ) |
if ( ind[j] ) |
if ( ind[j] ) |
c[j] = 0; |
c[j] = 0; |
else |
else |
c[j] = mat[k++][i]; |
c[j] = mat[k++][i]; |
c[i] = _chsgnsf(_onesf()); |
c[i] = _chsgnsf(_onesf()); |
for ( j = n; j >= 0; j-- ) |
for ( j = n; j >= 0; j-- ) |
if ( c[j] ) |
if ( c[j] ) |
break; |
break; |
DEG(w) = j; |
DEG(w) = j; |
r[l++] = w; |
r[l++] = w; |
} |
} |
} |
} |
/* |
/* |
make_qmatsf(p,tab,mp) |
make_qmatsf(p,tab,mp) |
Line 327 nullsf(mat,n,ind) |
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Line 297 nullsf(mat,n,ind) |
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null_to_solsf(ind,n,r) |
null_to_solsf(ind,n,r) |
*/ |
*/ |
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void czsfum(f,r) |
void czsfum(UM f,UM *r) |
UM f,*r; |
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{ |
{ |
int i,j; |
int i,j; |
int d,n,ord; |
int d,n,ord; |
UM s,t,u,v,w,g,x,m,q; |
UM s,t,u,v,w,g,x,m,q; |
UM *base; |
UM *base; |
|
|
n = DEG(f); base = (UM *)ALLOCA(n*sizeof(UM)); |
n = DEG(f); base = (UM *)ALLOCA(n*sizeof(UM)); |
bzero((char *)base,n*sizeof(UM)); |
bzero((char *)base,n*sizeof(UM)); |
|
|
w = W_UMALLOC(2*n); q = W_UMALLOC(2*n); m = W_UMALLOC(2*n); |
w = W_UMALLOC(2*n); q = W_UMALLOC(2*n); m = W_UMALLOC(2*n); |
|
|
base[0] = W_UMALLOC(0); DEG(base[0]) = 0; COEF(base[0])[0] = _onesf(); |
base[0] = W_UMALLOC(0); DEG(base[0]) = 0; COEF(base[0])[0] = _onesf(); |
|
|
t = W_UMALLOC(1); DEG(t) = 1; COEF(t)[0] = 0; COEF(t)[1] = _onesf(); |
t = W_UMALLOC(1); DEG(t) = 1; COEF(t)[0] = 0; COEF(t)[1] = _onesf(); |
|
|
ord = field_order_sf(); |
ord = field_order_sf(); |
pwrmodsfum(t,ord,f,w); |
pwrmodsfum(t,ord,f,w); |
base[1] = W_UMALLOC(DEG(w)); |
base[1] = W_UMALLOC(DEG(w)); |
cpyum(w,base[1]); |
cpyum(w,base[1]); |
|
|
for ( i = 2; i < n; i++ ) { |
for ( i = 2; i < n; i++ ) { |
mulsfum(base[i-1],base[1],m); |
mulsfum(base[i-1],base[1],m); |
DEG(m) = divsfum(m,f,q); |
DEG(m) = divsfum(m,f,q); |
base[i] = W_UMALLOC(DEG(m)); cpyum(m,base[i]); |
base[i] = W_UMALLOC(DEG(m)); cpyum(m,base[i]); |
} |
} |
|
|
v = W_UMALLOC(n); cpyum(f,v); |
v = W_UMALLOC(n); cpyum(f,v); |
DEG(w) = 1; COEF(w)[0] = 0; COEF(w)[1] = _onesf(); |
DEG(w) = 1; COEF(w)[0] = 0; COEF(w)[1] = _onesf(); |
x = W_UMALLOC(1); DEG(x) = 1; COEF(x)[0] = 0; COEF(x)[1] = _onesf(); |
x = W_UMALLOC(1); DEG(x) = 1; COEF(x)[0] = 0; COEF(x)[1] = _onesf(); |
t = W_UMALLOC(n); s = W_UMALLOC(n); u = W_UMALLOC(n); g = W_UMALLOC(n); |
t = W_UMALLOC(n); s = W_UMALLOC(n); u = W_UMALLOC(n); g = W_UMALLOC(n); |
|
|
for ( j = 0, d = 1; 2*d <= DEG(v); d++ ) { |
for ( j = 0, d = 1; 2*d <= DEG(v); d++ ) { |
for ( DEG(t) = -1, i = 0; i <= DEG(w); i++ ) |
for ( DEG(t) = -1, i = 0; i <= DEG(w); i++ ) |
if ( COEF(w)[i] ) { |
if ( COEF(w)[i] ) { |
mulssfum(base[i],COEF(w)[i],s); |
mulssfum(base[i],COEF(w)[i],s); |
addsfum(s,t,u); cpyum(u,t); |
addsfum(s,t,u); cpyum(u,t); |
} |
} |
cpyum(t,w); cpyum(v,s); subsfum(w,x,t); |
cpyum(t,w); cpyum(v,s); subsfum(w,x,t); |
gcdsfum(s,t,g); |
gcdsfum(s,t,g); |
if ( DEG(g) >= 1 ) { |
if ( DEG(g) >= 1 ) { |
berlekampsf(g,d,base,r+j); j += DEG(g)/d; |
berlekampsf(g,d,base,r+j); j += DEG(g)/d; |
divsfum(v,g,q); cpyum(q,v); |
divsfum(v,g,q); cpyum(q,v); |
DEG(w) = divsfum(w,v,q); |
DEG(w) = divsfum(w,v,q); |
for ( i = 0; i < DEG(v); i++ ) |
for ( i = 0; i < DEG(v); i++ ) |
DEG(base[i]) = divsfum(base[i],v,q); |
DEG(base[i]) = divsfum(base[i],v,q); |
} |
} |
} |
} |
if ( DEG(v) ) { |
if ( DEG(v) ) { |
r[j] = UMALLOC(DEG(v)); cpyum(v,r[j]); j++; |
r[j] = UMALLOC(DEG(v)); cpyum(v,r[j]); j++; |
} |
} |
r[j] = 0; |
r[j] = 0; |
} |
} |
|
|
int berlekampsf(p,df,tab,r) |
int berlekampsf(UM p,int df,UM *tab,UM *r) |
UM p; |
|
int df; |
|
UM *tab,*r; |
|
{ |
{ |
int n,i,j,k,nf,d,nr; |
int n,i,j,k,nf,d,nr; |
int **mat; |
int **mat; |
int *ind; |
int *ind; |
UM mp,w,q,gcd,w1,w2; |
UM mp,w,q,gcd,w1,w2; |
UM *u; |
UM *u; |
int *root; |
int *root; |
|
|
n = DEG(p); |
n = DEG(p); |
ind = ALLOCA(n*sizeof(int)); |
ind = ALLOCA(n*sizeof(int)); |
make_qmatsf(p,tab,&mat); |
make_qmatsf(p,tab,&mat); |
nullsf(mat,n,ind); |
nullsf(mat,n,ind); |
for ( i = 0, d = 0; i < n; i++ ) |
for ( i = 0, d = 0; i < n; i++ ) |
if ( ind[i] ) |
if ( ind[i] ) |
d++; |
d++; |
if ( d == 1 ) { |
if ( d == 1 ) { |
r[0] = UMALLOC(n); cpyum(p,r[0]); return 1; |
r[0] = UMALLOC(n); cpyum(p,r[0]); return 1; |
} |
} |
u = ALLOCA(d*sizeof(UM *)); |
u = ALLOCA(d*sizeof(UM *)); |
r[0] = UMALLOC(n); cpyum(p,r[0]); |
r[0] = UMALLOC(n); cpyum(p,r[0]); |
null_to_solsf(mat,ind,n,u); |
null_to_solsf(mat,ind,n,u); |
root = ALLOCA(d*sizeof(int)); |
root = ALLOCA(d*sizeof(int)); |
w = W_UMALLOC(n); mp = W_UMALLOC(d); |
w = W_UMALLOC(n); mp = W_UMALLOC(d); |
w1 = W_UMALLOC(n); w2 = W_UMALLOC(n); |
w1 = W_UMALLOC(n); w2 = W_UMALLOC(n); |
for ( i = 1, nf = 1; i < d; i++ ) { |
for ( i = 1, nf = 1; i < d; i++ ) { |
minipolysf(u[i],p,mp); |
minipolysf(u[i],p,mp); |
nr = find_rootsf(mp,root); |
nr = find_rootsf(mp,root); |
for ( j = 0; j < nf; j++ ) { |
for ( j = 0; j < nf; j++ ) { |
if ( DEG(r[j]) == df ) |
if ( DEG(r[j]) == df ) |
continue; |
continue; |
for ( k = 0; k < nr; k++ ) { |
for ( k = 0; k < nr; k++ ) { |
cpyum(u[i],w1); cpyum(r[j],w2); |
cpyum(u[i],w1); cpyum(r[j],w2); |
COEF(w1)[0] = _chsgnsf(root[k]); |
COEF(w1)[0] = _chsgnsf(root[k]); |
gcdsfum(w1,w2,w); |
gcdsfum(w1,w2,w); |
if ( DEG(w) > 0 && DEG(w) < DEG(r[j]) ) { |
if ( DEG(w) > 0 && DEG(w) < DEG(r[j]) ) { |
gcd = UMALLOC(DEG(w)); |
gcd = UMALLOC(DEG(w)); |
q = UMALLOC(DEG(r[j])-DEG(w)); |
q = UMALLOC(DEG(r[j])-DEG(w)); |
cpyum(w,gcd); divsfum(r[j],w,q); |
cpyum(w,gcd); divsfum(r[j],w,q); |
r[j] = q; r[nf++] = gcd; |
r[j] = q; r[nf++] = gcd; |
} |
} |
if ( nf == d ) |
if ( nf == d ) |
return d; |
return d; |
} |
} |
} |
} |
} |
} |
|
/* NOT REACHED */ |
|
error("berlekampsf : cannot happen"); |
|
return 0; |
} |
} |
|
|
void minipolysf(f,p,mp) |
void minipolysf(UM f,UM p,UM mp) |
UM f,p,mp; |
|
{ |
{ |
struct p_pair *list,*l,*l1,*lprev; |
struct p_pair *list,*l,*l1,*lprev; |
int n,d; |
int n,d; |
UM u,p0,p1,np0,np1,q,w; |
UM u,p0,p1,np0,np1,q,w; |
|
|
list = (struct p_pair *)MALLOC(sizeof(struct p_pair)); |
list = (struct p_pair *)MALLOC(sizeof(struct p_pair)); |
list->p0 = u = W_UMALLOC(0); DEG(u) = 0; COEF(u)[0] = _onesf(); |
list->p0 = u = W_UMALLOC(0); DEG(u) = 0; COEF(u)[0] = _onesf(); |
list->p1 = W_UMALLOC(0); cpyum(list->p0,list->p1); |
list->p1 = W_UMALLOC(0); cpyum(list->p0,list->p1); |
list->next = 0; |
list->next = 0; |
n = DEG(p); w = UMALLOC(2*n); |
n = DEG(p); w = UMALLOC(2*n); |
p0 = UMALLOC(2*n); cpyum(list->p0,p0); |
p0 = UMALLOC(2*n); cpyum(list->p0,p0); |
p1 = UMALLOC(2*n); cpyum(list->p1,p1); |
p1 = UMALLOC(2*n); cpyum(list->p1,p1); |
q = W_UMALLOC(2*n); |
q = W_UMALLOC(2*n); |
while ( 1 ) { |
while ( 1 ) { |
COEF(p0)[DEG(p0)] = 0; DEG(p0)++; COEF(p0)[DEG(p0)] = _onesf(); |
COEF(p0)[DEG(p0)] = 0; DEG(p0)++; COEF(p0)[DEG(p0)] = _onesf(); |
mulsfum(f,p1,w); DEG(w) = divsfum(w,p,q); cpyum(w,p1); |
mulsfum(f,p1,w); DEG(w) = divsfum(w,p,q); cpyum(w,p1); |
np0 = UMALLOC(n); np1 = UMALLOC(n); |
np0 = UMALLOC(n); np1 = UMALLOC(n); |
lnfsf(n,p0,p1,list,np0,np1); |
lnfsf(n,p0,p1,list,np0,np1); |
if ( DEG(np1) < 0 ) { |
if ( DEG(np1) < 0 ) { |
cpyum(np0,mp); return; |
cpyum(np0,mp); return; |
} else { |
} else { |
l1 = (struct p_pair *)MALLOC(sizeof(struct p_pair)); |
l1 = (struct p_pair *)MALLOC(sizeof(struct p_pair)); |
l1->p0 = np0; l1->p1 = np1; |
l1->p0 = np0; l1->p1 = np1; |
for ( l = list, lprev = 0, d = DEG(np1); |
for ( l = list, lprev = 0, d = DEG(np1); |
l && (DEG(l->p1) > d); lprev = l, l = l->next ); |
l && (DEG(l->p1) > d); lprev = l, l = l->next ); |
if ( lprev ) { |
if ( lprev ) { |
lprev->next = l1; l1->next = l; |
lprev->next = l1; l1->next = l; |
} else { |
} else { |
l1->next = list; list = l1; |
l1->next = list; list = l1; |
} |
} |
} |
} |
} |
} |
} |
} |
|
|
void lnfsf(n,p0,p1,list,np0,np1) |
void lnfsf(int n,UM p0,UM p1,struct p_pair *list,UM np0,UM np1) |
int n; |
|
UM p0,p1; |
|
struct p_pair *list; |
|
UM np0,np1; |
|
{ |
{ |
int inv,h,d1; |
int h,d1; |
UM t0,t1,s0,s1; |
UM t0,t1,s0,s1; |
struct p_pair *l; |
struct p_pair *l; |
|
|
cpyum(p0,np0); cpyum(p1,np1); |
cpyum(p0,np0); cpyum(p1,np1); |
t0 = W_UMALLOC(n); t1 = W_UMALLOC(n); |
t0 = W_UMALLOC(n); t1 = W_UMALLOC(n); |
s0 = W_UMALLOC(n); s1 = W_UMALLOC(n); |
s0 = W_UMALLOC(n); s1 = W_UMALLOC(n); |
for ( l = list; l; l = l->next ) { |
for ( l = list; l; l = l->next ) { |
d1 = DEG(np1); |
d1 = DEG(np1); |
if ( d1 == DEG(l->p1) ) { |
if ( d1 == DEG(l->p1) ) { |
h = _divsf(COEF(np1)[d1],_chsgnsf(COEF(l->p1)[d1])); |
h = _divsf(COEF(np1)[d1],_chsgnsf(COEF(l->p1)[d1])); |
mulssfum(l->p0,h,t0); addsfum(np0,t0,s0); cpyum(s0,np0); |
mulssfum(l->p0,h,t0); addsfum(np0,t0,s0); cpyum(s0,np0); |
mulssfum(l->p1,h,t1); addsfum(np1,t1,s1); cpyum(s1,np1); |
mulssfum(l->p1,h,t1); addsfum(np1,t1,s1); cpyum(s1,np1); |
} |
} |
} |
} |
} |
} |
|
|
int find_rootsf(p,root) |
int find_rootsf(UM p,int *root) |
UM p; |
|
int *root; |
|
{ |
{ |
UM *r; |
UM *r; |
int i,j,n; |
int i,n; |
|
|
n = DEG(p); |
n = DEG(p); |
r = ALLOCA((DEG(p))*sizeof(UM)); |
r = ALLOCA((DEG(p))*sizeof(UM)); |
canzassf(p,1,r); |
canzassf(p,1,r); |
for ( i = 0; i < n; i++ ) |
for ( i = 0; i < n; i++ ) |
root[i] = _chsgnsf(COEF(r[i])[0]); |
root[i] = _chsgnsf(COEF(r[i])[0]); |
return n; |
return n; |
} |
} |
|
|
void canzassf(f,d,r) |
void canzassf(UM f,int d,UM *r) |
UM f,*r; |
|
int d; |
|
{ |
{ |
UM t,s,u,w,g,o; |
UM t,s,u,w,g,o; |
N n1,n2,n3,n4,n5; |
N n1,n2,n3,n4,n5; |
UM *b; |
UM *b; |
int n,m,i,q,ed; |
int n,q,ed; |
|
|
if ( DEG(f) == d ) { |
if ( DEG(f) == d ) { |
r[0] = UMALLOC(d); cpyum(f,r[0]); |
r[0] = UMALLOC(d); cpyum(f,r[0]); |
return; |
return; |
} else { |
} else { |
n = DEG(f); b = (UM *)ALLOCA(n*sizeof(UM)); |
n = DEG(f); b = (UM *)ALLOCA(n*sizeof(UM)); |
bzero((char *)b,n*sizeof(UM)); |
bzero((char *)b,n*sizeof(UM)); |
|
|
t = W_UMALLOC(2*d); |
t = W_UMALLOC(2*d); |
s = W_UMALLOC(DEG(f)); u = W_UMALLOC(DEG(f)); |
s = W_UMALLOC(DEG(f)); u = W_UMALLOC(DEG(f)); |
w = W_UMALLOC(DEG(f)); g = W_UMALLOC(DEG(f)); |
w = W_UMALLOC(DEG(f)); g = W_UMALLOC(DEG(f)); |
o = W_UMALLOC(0); DEG(o) = 0; COEF(o)[0] = _onesf(); |
o = W_UMALLOC(0); DEG(o) = 0; COEF(o)[0] = _onesf(); |
q = field_order_sf(); |
q = field_order_sf(); |
if ( q % 2 ) { |
if ( q % 2 ) { |
STON(q,n1); pwrn(n1,d,&n2); subn(n2,ONEN,&n3); |
STON(q,n1); pwrn(n1,d,&n2); subn(n2,ONEN,&n3); |
STON(2,n4); divsn(n3,n4,&n5); |
STON(2,n4); divsn(n3,n4,&n5); |
} else |
} else |
ed = d*extdeg_sf(); |
ed = d*extdeg_sf(); |
while ( 1 ) { |
while ( 1 ) { |
randsfum(2*d,t); |
randsfum(2*d,t); |
if ( q % 2 ) { |
if ( q % 2 ) { |
spwrsfum(f,t,n5,s); subsfum(s,o,u); |
spwrsfum(f,t,n5,s); subsfum(s,o,u); |
} else |
} else |
tracemodsfum(f,t,ed,u); |
tracemodsfum(f,t,ed,u); |
cpyum(f,w); |
cpyum(f,w); |
gcdsfum(w,u,g); |
gcdsfum(w,u,g); |
if ( (DEG(g) >= 1) && (DEG(g) < DEG(f)) ) { |
if ( (DEG(g) >= 1) && (DEG(g) < DEG(f)) ) { |
canzassf(g,d,r); |
canzassf(g,d,r); |
cpyum(f,w); divsfum(w,g,s); |
cpyum(f,w); divsfum(w,g,s); |
canzassf(s,d,r+DEG(g)/d); |
canzassf(s,d,r+DEG(g)/d); |
return; |
return; |
} |
} |
} |
} |
} |
} |
} |
} |
|
|
/* Hensel related functions */ |
/* Hensel related functions */ |
|
|
int sfberle(VL,P,int,GFS *,DCP *); |
int sfberle(V,V,P,int,GFS *,DCP *); |
void sfgcdgen(P,ML,ML *); |
void sfgcdgen(P,ML,ML *); |
void sfhenmain2(BM,UM,UM,int,BM *); |
void sfhenmain2(BM,UM,UM,int,BM *); |
void ptosfbm(int,P,BM); |
void ptosfbm(int,P,BM); |
|
void sfhensel(int count,P f,V x,V y,int degbound,GFS *evp,P *sfp,ML *listp); |
|
|
/* f = f(x,y) */ |
/* f = f(x,y) */ |
|
|
void sfhensel(count,f,x,evp,sfp,listp) |
void sfhensel(int count,P f,V x,V y,int degbound,GFS *evp,P *sfp,ML *listp) |
int count; |
|
P f; |
|
V x; |
|
GFS *evp; |
|
P *sfp; |
|
ML *listp; |
|
{ |
{ |
int i,j; |
int i; |
int fn,n; |
int fn; |
ML rlist; |
ML rlist; |
BM fl; |
BM fl; |
VL vl,nvl; |
VL vl,nvl; |
V y; |
int dx,dy,bound; |
int dx,dy,mev; |
GFS ev; |
GFS ev; |
P f1,t,c,sf; |
P f1,t,yev,c,sf; |
DCP dc,dct,dc0; |
DCP dc; |
UM q,fm,hm; |
UM w,w1,q,fm,hm; |
UM *gm; |
UM *gm; |
struct oEGT tmp0,tmp1,eg_hensel,eg_hensel_t; |
struct oEGT tmp0,tmp1,eg_hensel,eg_hensel_t; |
|
|
|
clctv(CO,f,&vl); |
clctv(CO,f,&vl); |
if ( vl->v != x ) { |
if ( vl->v != x ) { |
reordvar(vl,x,&nvl); reorderp(nvl,vl,f,&f1); |
reordvar(vl,x,&nvl); reorderp(nvl,vl,f,&f1); |
vl = nvl; f = f1; |
vl = nvl; f = f1; |
} |
} |
y = vl->next->v; |
if ( vl->next ) |
dx = getdeg(x,f); |
y = vl->next->v; |
dy = getdeg(y,f); |
dx = getdeg(x,f); |
if ( dx == 1 ) { |
dy = getdeg(y,f); |
*listp = rlist = MLALLOC(1); rlist->n = 1; rlist->c[0] = 0; |
if ( dx == 1 ) { |
return; |
*listp = rlist = MLALLOC(1); rlist->n = 1; rlist->c[0] = 0; |
} |
return; |
fn = sfberle(vl,f,count,&ev,&dc); |
} |
if ( fn <= 1 ) { |
fn = sfberle(x,y,f,count,&ev,&dc); |
/* fn == 0 => short of evaluation points */ |
if ( fn <= 1 ) { |
*listp = rlist = MLALLOC(1); rlist->n = fn; rlist->c[0] = 0; |
/* fn == 0 => short of evaluation points */ |
return; |
*listp = rlist = MLALLOC(1); rlist->n = fn; rlist->c[0] = 0; |
} |
return; |
/* pass the the leading coeff. to the first element */ |
} |
c = dc->c; dc = NEXT(dc); |
if ( degbound >= 0 ) { |
mulp(vl,dc->c,c,&t); dc->c = t; |
/* |
|
* reconstruct dc so that |
|
* dc[1],... : factors satisfy degree bound |
|
* dc[0] : product of others |
|
*/ |
|
c = dc->c; dc = NEXT(dc); |
|
dc0 = 0; |
|
fn = 0; |
|
while ( dc ) { |
|
if ( getdeg(x,COEF(dc)) <= degbound ) { |
|
dct = NEXT(dc); NEXT(dc) = dc0; dc0 = dc; dc = dct; |
|
fn++; |
|
} else { |
|
mulp(vl,COEF(dc),c,&t); c = t; |
|
dc = NEXT(dc); |
|
} |
|
} |
|
if ( OID(c) == O_P ) { |
|
NEWDC(dc); COEF(dc) = c; DEG(dc) = ONE; NEXT(dc) = dc0; |
|
fn++; |
|
} else { |
|
mulp(vl,dc0->c,c,&t); dc0->c = t; dc = dc0; |
|
} |
|
} else { |
|
/* pass the the leading coeff. to the first element */ |
|
c = dc->c; dc = NEXT(dc); |
|
mulp(vl,dc->c,c,&t); dc->c = t; |
|
} |
|
|
/* convert mod y-a factors into UM */ |
/* convert mod y-a factors into UM */ |
gm = (UM *)ALLOCA(fn*sizeof(UM)); |
gm = (UM *)ALLOCA(fn*sizeof(UM)); |
for ( i = 0; i < fn; i++, dc = NEXT(dc) ) { |
for ( i = 0; i < fn; i++, dc = NEXT(dc) ) { |
gm[i] = W_UMALLOC(UDEG(dc->c)); |
gm[i] = W_UMALLOC(UDEG(dc->c)); |
ptosfum(dc->c,gm[i]); |
ptosfum(dc->c,gm[i]); |
} |
} |
|
|
/* f(x,y) -> f(x,y+ev) */ |
/* set bound */ |
fl = BMALLOC(dx,dy); |
/* g | f, lc_y(g) = lc_y(f) => deg_y(g) <= deg_y(f) */ |
ptosfbm(dy,f,fl); |
/* so, bound = dy is sufficient, but we use slightly large value */ |
if ( ev ) shiftsfbm(fl,FTOIF(CONT(ev))); |
bound = dy+2; |
|
|
/* sf = f(x+ev) */ |
/* f(x,y) -> f(x,y+ev) */ |
sfbmtop(fl,x,y,&sf); |
fl = BMALLOC(dx,bound); |
|
ptosfbm(bound,f,fl); |
|
if ( ev ) shiftsfbm(fl,FTOIF(CONT(ev))); |
|
|
/* fm = fl mod y */ |
/* sf = f(x+ev) */ |
fm = W_UMALLOC(dx); |
sfbmtop(fl,x,y,&sf); |
cpyum(COEF(fl)[0],fm); |
|
hm = W_UMALLOC(dx); |
|
|
|
q = W_UMALLOC(dx); |
/* fm = fl mod y */ |
rlist = MLALLOC(fn); rlist->n = fn; rlist->bound = dy; |
fm = W_UMALLOC(dx); |
fprintf(asir_out,"%d candidates\n",fn); |
cpyum(COEF(fl)[0],fm); |
init_eg(&eg_hensel); |
hm = W_UMALLOC(dx); |
for ( i = 0; i < fn-1; i++ ) { |
|
fprintf(asir_out,"deg(fm) = %d, deg(gm[%d]) = %d\n", |
|
DEG(fm),i,DEG(gm[i])); |
|
init_eg(&eg_hensel_t); |
|
get_eg(&tmp0); |
|
/* fl = gm[i]*hm mod y */ |
|
divsfum(fm,gm[i],hm); |
|
/* fl is replaced by the cofactor of gk mod y^dy */ |
|
/* rlist->c[i] = gk */ |
|
sfhenmain2(fl,gm[i],hm,dy,(BM *)&rlist->c[i]); |
|
cpyum(hm,fm); |
|
get_eg(&tmp1); add_eg(&eg_hensel_t,&tmp0,&tmp1); |
|
add_eg(&eg_hensel,&tmp0,&tmp1); |
|
print_eg("Hensel",&eg_hensel_t); |
|
fprintf(asir_out,"\n"); |
|
} |
|
print_eg("Hensel total",&eg_hensel); |
|
fprintf(asir_out,"\n"); |
|
/* finally, fl must be the lift of gm[fn-1] */ |
|
rlist->c[i] = fl; |
|
|
|
|
q = W_UMALLOC(dx); |
|
rlist = MLALLOC(fn); rlist->n = fn; rlist->bound = bound; |
|
if ( debug_sfbfctr ) |
|
fprintf(asir_out,"%d candidates\n",fn); |
|
init_eg(&eg_hensel); |
|
for ( i = 0; i < fn-1; i++ ) { |
|
if ( debug_sfbfctr ) |
|
fprintf(asir_out,"deg(fm) = %d, deg(gm[%d]) = %d\n", |
|
DEG(fm),i,DEG(gm[i])); |
|
init_eg(&eg_hensel_t); |
|
get_eg(&tmp0); |
|
/* fl = gm[i]*hm mod y */ |
|
divsfum(fm,gm[i],hm); |
|
/* fl is replaced by the cofactor of gk mod y^bound */ |
|
/* rlist->c[i] = gk */ |
|
sfhenmain2(fl,gm[i],hm,bound,(BM *)&rlist->c[i]); |
|
cpyum(hm,fm); |
|
get_eg(&tmp1); add_eg(&eg_hensel_t,&tmp0,&tmp1); |
|
add_eg(&eg_hensel,&tmp0,&tmp1); |
|
if ( debug_sfbfctr) { |
|
print_eg("Hensel",&eg_hensel_t); |
|
fprintf(asir_out,"\n"); |
|
} |
|
} |
|
if ( debug_sfbfctr) { |
|
print_eg("Hensel total",&eg_hensel); |
|
fprintf(asir_out,"\n"); |
|
} |
|
/* finally, fl must be the lift of gm[fn-1] */ |
|
rlist->c[i] = fl; |
|
|
#if 0 |
#if 0 |
/* y -> y-a */ |
/* y -> y-a */ |
mev = _chsgnsf(FTOIF(CONT(ev))); |
mev = _chsgnsf(FTOIF(CONT(ev))); |
for ( i = 0; i < fn; i++ ) |
for ( i = 0; i < fn; i++ ) |
shiftsfbm((BM)(rlist->c[i]),mev); |
shiftsfbm((BM)(rlist->c[i]),mev); |
#endif |
#endif |
*evp = ev; |
*evp = ev; |
*sfp = sf; |
*sfp = sf; |
*listp = rlist; |
*listp = rlist; |
} |
} |
|
|
/* main variable of f = x */ |
/* main variable of f = x */ |
|
|
int sfberle(vl,f,count,ev,dcp) |
int sfberle(V x,V y,P f,int count,GFS *ev,DCP *dcp) |
VL vl; |
|
P f; |
|
int count; |
|
GFS *ev; |
|
DCP *dcp; |
|
{ |
{ |
UM wf,wf1,wf2,wfs,gcd; |
UM wf,wf1,wf2,wfs,gcd; |
ML flist; |
int fn,n; |
int fn,fn1,n; |
GFS m,fm; |
GFS m,fm; |
DCP dc,dct,dc0; |
DCP dc,dct,dc0; |
VL vl; |
VL nvl; |
P lc,lc0,f0; |
V x,y; |
Obj obj; |
P g,lc,lc0,f0; |
int j,q,index,i; |
int j,q1,index,i; |
|
|
|
clctv(vl,f,&nvl); vl = nvl; |
NEWVL(vl); vl->v = x; |
x = vl->v; y = vl->next->v; |
NEWVL(NEXT(vl)); NEXT(vl)->v = y; |
simp_ff(f,&g); g = f; |
NEXT(NEXT(vl)) =0; |
n = QTOS(DEG(DC(f))); |
simp_ff((Obj)f,&obj); f = (P)obj; |
wf = W_UMALLOC(n); wf1 = W_UMALLOC(n); wf2 = W_UMALLOC(n); |
n = QTOS(DEG(DC(f))); |
wfs = W_UMALLOC(n); gcd = W_UMALLOC(n); |
wf = W_UMALLOC(n); wf1 = W_UMALLOC(n); wf2 = W_UMALLOC(n); |
q1 = field_order_sf()-1; |
wfs = W_UMALLOC(n); gcd = W_UMALLOC(n); |
lc = DC(f)->c; |
q = field_order_sf(); |
for ( j = 0, fn = n + 1, index = 0; |
lc = DC(f)->c; |
index < q1 && j < count && fn > 1; index++ ) { |
for ( j = 0, fn = n + 1, index = 0; |
MKGFS(index,m); |
index < q && j < count && fn > 1; index++ ) { |
substp(vl,lc,y,(P)m,&lc0); |
indextogfs(index,&m); |
if ( lc0 ) { |
substp(vl,lc,y,(P)m,&lc0); |
substp(vl,f,y,(P)m,&f0); |
if ( lc0 ) { |
ptosfum(f0,wf); cpyum(wf,wf1); |
substp(vl,f,y,(P)m,&f0); |
diffsfum(wf1,wf2); gcdsfum(wf1,wf2,gcd); |
ptosfum(f0,wf); cpyum(wf,wf1); |
if ( DEG(gcd) == 0 ) { |
diffsfum(wf1,wf2); gcdsfum(wf1,wf2,gcd); |
fctrsf(f0,&dc); |
if ( DEG(gcd) == 0 ) { |
for ( dct = NEXT(dc), i = 0; dct; dct = NEXT(dct), i++ ); |
ufctrsf(f0,&dc); |
if ( i < fn ) { |
for ( dct = NEXT(dc), i = 0; dct; dct = NEXT(dct), i++ ); |
dc0 = dc; fn = i; fm = m; |
if ( i < fn ) { |
} |
dc0 = dc; fn = i; fm = m; |
j++; |
} |
} |
j++; |
} |
} |
} |
} |
if ( index == q1 ) |
} |
return 0; |
if ( index == q ) |
else if ( fn == 1 ) |
return 0; |
return 1; |
else if ( fn == 1 ) |
else { |
return 1; |
*dcp = dc0; |
else { |
*ev = fm; |
*dcp = dc0; |
return fn; |
*ev = fm; |
} |
return fn; |
|
} |
} |
} |
|
|
void sfgcdgen(f,blist,clistp) |
void sfgcdgen(P f,ML blist,ML *clistp) |
P f; |
|
ML blist,*clistp; |
|
{ |
{ |
int i; |
int i; |
int n,d,np; |
int n,d,np; |
UM wf,wm,wx,wy,wu,wv,wa,wb,wg,q,tum; |
UM wf,wm,wx,wy,wu,wv,wa,wb,wg,q,tum; |
UM *in,*out; |
UM *in,*out; |
ML clist; |
ML clist; |
|
|
n = UDEG(f); np = blist->n; |
n = UDEG(f); np = blist->n; |
d = 2*n; |
d = 2*n; |
q = W_UMALLOC(d); wf = W_UMALLOC(d); |
q = W_UMALLOC(d); wf = W_UMALLOC(d); |
wm = W_UMALLOC(d); wx = W_UMALLOC(d); |
wm = W_UMALLOC(d); wx = W_UMALLOC(d); |
wy = W_UMALLOC(d); wu = W_UMALLOC(d); |
wy = W_UMALLOC(d); wu = W_UMALLOC(d); |
wv = W_UMALLOC(d); wg = W_UMALLOC(d); |
wv = W_UMALLOC(d); wg = W_UMALLOC(d); |
wa = W_UMALLOC(d); wb = W_UMALLOC(d); |
wa = W_UMALLOC(d); wb = W_UMALLOC(d); |
ptosfum(f,wf); DEG(wg) = 0; COEF(wg)[0] = _onesf(); |
ptosfum(f,wf); DEG(wg) = 0; COEF(wg)[0] = _onesf(); |
*clistp = clist = MLALLOC(np); clist->n = np; |
*clistp = clist = MLALLOC(np); clist->n = np; |
for ( i = 0, in = (UM *)blist->c, out = (UM *)clist->c; i < np; i++ ) { |
for ( i = 0, in = (UM *)blist->c, out = (UM *)clist->c; i < np; i++ ) { |
divsfum(wf,in[i],q); tum = wf; wf = q; q = tum; |
divsfum(wf,in[i],q); tum = wf; wf = q; q = tum; |
cpyum(wf,wx); cpyum(in[i],wy); |
cpyum(wf,wx); cpyum(in[i],wy); |
eucsfum(wx,wy,wa,wb); mulsfum(wa,wg,wm); |
eucsfum(wx,wy,wa,wb); mulsfum(wa,wg,wm); |
DEG(wm) = divsfum(wm,in[i],q); out[i] = UMALLOC(DEG(wm)); |
DEG(wm) = divsfum(wm,in[i],q); out[i] = UMALLOC(DEG(wm)); |
cpyum(wm,out[i]); mulsfum(q,wf,wu); |
cpyum(wm,out[i]); mulsfum(q,wf,wu); |
mulsfum(wg,wb,wv); addsfum(wu,wv,wg); |
mulsfum(wg,wb,wv); addsfum(wu,wv,wg); |
} |
} |
} |
} |
|
|
/* f = g0*h0 mod y -> f = gk*hk mod y^(dy+1), f is replaced by hk */ |
/* f = g0*h0 mod y -> f = gk*hk mod y^(dy+1), f is replaced by hk */ |
|
|
void sfhenmain2(f,g0,h0,dy,gp) |
void sfhenmain2(BM f,UM g0,UM h0,int dy,BM *gp) |
BM f; |
|
UM g0,h0; |
|
int dy; |
|
BM *gp; |
|
{ |
{ |
int i,j,k,l; |
int i,k; |
int *px,*py; |
int dx; |
int **pp,**pp1; |
UM wt,wa,wb,q,w1,w2,wh1,wg1,ws; |
int dx,np,dr,tmp; |
UM wc,wd,we,wz; |
UM wt,wa,wb,wm,q,w1,w2,wh1,wg1,ws; |
BM wb0,wb1; |
UM wc,wd,we,wz; |
int dg,dh; |
BM wb0,wb1; |
BM fk,gk,hk; |
int dg,dh; |
|
BM fk,gk,hk; |
if ( DEG(f) < dy ) |
|
error("sfhenmain2 : invalid input"); |
if ( DEG(f) < dy ) |
|
error("sfhenmain2 : invalid input"); |
|
|
|
dx = degbm(f); |
dx = degbm(f); |
dg = DEG(g0); |
dg = DEG(g0); |
dh = DEG(h0); |
dh = DEG(h0); |
|
|
W_BMALLOC(dx,dy,wb0); W_BMALLOC(dx,dy,wb1); |
W_BMALLOC(dx,dy,wb0); W_BMALLOC(dx,dy,wb1); |
wt = W_UMALLOC(dx); ws = W_UMALLOC(dx); q = W_UMALLOC(2*dx); |
wt = W_UMALLOC(dx); ws = W_UMALLOC(dx); q = W_UMALLOC(2*dx); |
wg1 = W_UMALLOC(2*dx); wh1 = W_UMALLOC(2*dx); |
wg1 = W_UMALLOC(2*dx); wh1 = W_UMALLOC(2*dx); |
|
|
/* fk = gk*hk mod y^k */ |
/* fk = gk*hk mod y^k */ |
W_BMALLOC(dx,dy,fk); |
W_BMALLOC(dx,dy,fk); |
cpyum(COEF(f)[0],COEF(fk)[0]); |
cpyum(COEF(f)[0],COEF(fk)[0]); |
gk = BMALLOC(dg,dy); |
gk = BMALLOC(dg,dy); |
cpyum(g0,COEF(gk)[0]); |
cpyum(g0,COEF(gk)[0]); |
W_BMALLOC(dh,dy,hk); |
W_BMALLOC(dh,dy,hk); |
cpyum(h0,COEF(hk)[0]); |
cpyum(h0,COEF(hk)[0]); |
|
|
wc = W_UMALLOC(2*dx); wd = W_UMALLOC(2*dx); |
wc = W_UMALLOC(2*dx); wd = W_UMALLOC(2*dx); |
we = W_UMALLOC(2*dx); wz = W_UMALLOC(2*dx); |
we = W_UMALLOC(2*dx); wz = W_UMALLOC(2*dx); |
|
|
/* compute wa,wb s.t. wa*g0+wb*h0 = 1 mod y */ |
/* compute wa,wb s.t. wa*g0+wb*h0 = 1 mod y */ |
w1 = W_UMALLOC(dg); cpyum(g0,w1); |
w1 = W_UMALLOC(dg); cpyum(g0,w1); |
w2 = W_UMALLOC(dh); cpyum(h0,w2); |
w2 = W_UMALLOC(dh); cpyum(h0,w2); |
wa = W_UMALLOC(2*dx); wb = W_UMALLOC(2*dx); /* XXX */ |
wa = W_UMALLOC(2*dx); wb = W_UMALLOC(2*dx); /* XXX */ |
eucsfum(w1,w2,wa,wb); |
eucsfum(w1,w2,wa,wb); |
|
|
fprintf(stderr,"dy=%d\n",dy); |
if ( debug_sfbfctr) |
for ( k = 1; k <= dy; k++ ) { |
fprintf(stderr,"dy=%d\n",dy); |
fprintf(stderr,"."); |
for ( k = 1; k <= dy; k++ ) { |
|
if ( debug_sfbfctr) |
|
fprintf(stderr,"."); |
|
|
/* at this point, f = gk*hk mod y^k */ |
/* at this point, f = gk*hk mod y^k */ |
|
|
/* clear wt */ |
/* clear wt */ |
clearum(wt,dx); |
clearum(wt,dx); |
|
|
/* wt = (f-gk*hk)/y^k */ |
/* wt = (f-gk*hk)/y^k */ |
subsfum(COEF(f)[k],COEF(fk)[k],wt); |
subsfum(COEF(f)[k],COEF(fk)[k],wt); |
|
|
/* compute wf1,wg1 s.t. wh1*g0+wg1*h0 = wt */ |
/* compute wf1,wg1 s.t. wh1*g0+wg1*h0 = wt */ |
mulsfum(wa,wt,wh1); DEG(wh1) = divsfum(wh1,h0,q); |
mulsfum(wa,wt,wh1); DEG(wh1) = divsfum(wh1,h0,q); |
mulsfum(wh1,g0,wc); subsfum(wt,wc,wd); DEG(wd) = divsfum(wd,h0,wg1); |
mulsfum(wh1,g0,wc); subsfum(wt,wc,wd); DEG(wd) = divsfum(wd,h0,wg1); |
|
|
/* check */ |
/* check */ |
#if 0 |
#if 0 |
if ( DEG(wd) >= 0 || DEG(wg1) > ng ) |
if ( DEG(wd) >= 0 || DEG(wg1) > ng ) |
error("henmain2 : cannot happen(adj)"); |
error("henmain2 : cannot happen(adj)"); |
|
|
mulsfum(wg1,h0,wc); mulsfum(wh1,g0,wd); addsfum(wc,wd,we); |
mulsfum(wg1,h0,wc); mulsfum(wh1,g0,wd); addsfum(wc,wd,we); |
subsfum(we,wt,wz); |
subsfum(we,wt,wz); |
if ( DEG(wz) >= 0 ) |
if ( DEG(wz) >= 0 ) |
error("henmain2 : cannot happen"); |
error("henmain2 : cannot happen"); |
#endif |
#endif |
|
|
/* fk += ((wg1*hk+wh1*gk)*y^k+wg1*wh1*y^(2*k) mod y^(dy+1) */ |
/* fk += ((wg1*hk+wh1*gk)*y^k+wg1*wh1*y^(2*k) mod y^(dy+1) */ |
/* wb0 = wh1*y^k */ |
/* wb0 = wh1*y^k */ |
clearbm(dx,wb0); |
clearbm(dx,wb0); |
cpyum(wh1,COEF(wb0)[k]); |
cpyum(wh1,COEF(wb0)[k]); |
|
|
/* wb1 = gk*wb0 mod y^(dy+1) */ |
/* wb1 = gk*wb0 mod y^(dy+1) */ |
clearbm(dx,wb1); |
clearbm(dx,wb1); |
mulsfbm(gk,wb0,wb1); |
mulsfbm(gk,wb0,wb1); |
/* fk += wb1 */ |
/* fk += wb1 */ |
addtosfbm(wb1,fk); |
addtosfbm(wb1,fk); |
|
|
/* wb0 = wg1*y^k */ |
/* wb0 = wg1*y^k */ |
clearbm(dx,wb0); |
clearbm(dx,wb0); |
cpyum(wg1,COEF(wb0)[k]); |
cpyum(wg1,COEF(wb0)[k]); |
|
|
/* wb1 = hk*wb0 mod y^(dy+1) */ |
/* wb1 = hk*wb0 mod y^(dy+1) */ |
clearbm(dx,wb1); |
clearbm(dx,wb1); |
mulsfbm(hk,wb0,wb1); |
mulsfbm(hk,wb0,wb1); |
/* fk += wb1 */ |
/* fk += wb1 */ |
addtosfbm(wb1,fk); |
addtosfbm(wb1,fk); |
|
|
/* fk += wg1*wh1*y^(2*k) mod y^(dy+1) */ |
/* fk += wg1*wh1*y^(2*k) mod y^(dy+1) */ |
if ( 2*k <= dy ) { |
if ( 2*k <= dy ) { |
mulsfum(wg1,wh1,wt); addsfum(COEF(fk)[2*k],wt,ws); |
mulsfum(wg1,wh1,wt); addsfum(COEF(fk)[2*k],wt,ws); |
cpyum(ws,COEF(fk)[2*k]); |
cpyum(ws,COEF(fk)[2*k]); |
} |
} |
|
|
/* gk += wg1*y^k, hk += wh1*y^k */ |
/* gk += wg1*y^k, hk += wh1*y^k */ |
cpyum(wg1,COEF(gk)[k]); |
cpyum(wg1,COEF(gk)[k]); |
cpyum(wh1,COEF(hk)[k]); |
cpyum(wh1,COEF(hk)[k]); |
} |
} |
fprintf(stderr,"\n"); |
if ( debug_sfbfctr) |
*gp = gk; |
fprintf(stderr,"\n"); |
DEG(f) = dy; |
*gp = gk; |
for ( i = 0; i <= dy; i++ ) |
DEG(f) = dy; |
cpyum(COEF(hk)[i],COEF(f)[i]); |
for ( i = 0; i <= dy; i++ ) |
|
cpyum(COEF(hk)[i],COEF(f)[i]); |
} |
} |
|
|
|
/* a0*g+b0*h = 1 mod y -> a*g+b*h = 1 mod y^(dy+1) */ |
|
|
|
void sfexgcd_by_hensel(BM g,BM h,int dy,BM *ap,BM *bp) |
|
{ |
|
int i,k; |
|
int dx; |
|
UM wt,wa,wb,q,w1,w2,ws; |
|
UM wc,wd,we,wz,wa1,wb1; |
|
BM wz0,wz1; |
|
int dg,dh; |
|
BM a,b,c; |
|
|
|
dg = degbm(g); |
|
dh = degbm(h); |
|
dx = dg+dh; |
|
|
|
a = BMALLOC(dh,dy); |
|
b = BMALLOC(dg,dy); |
|
/* c holds a*g+b*h-1 */ |
|
c = BMALLOC(dg+dh,dy); |
|
|
|
W_BMALLOC(dx,dy,wz0); W_BMALLOC(dx,dy,wz1); |
|
|
|
wt = W_UMALLOC(dx); ws = W_UMALLOC(dx); q = W_UMALLOC(2*dx); |
|
wa1 = W_UMALLOC(2*dx); wb1 = W_UMALLOC(2*dx); |
|
wc = W_UMALLOC(2*dx); wd = W_UMALLOC(2*dx); |
|
we = W_UMALLOC(2*dx); wz = W_UMALLOC(2*dx); |
|
|
|
/* compute wa,wb s.t. wa*g0+wb*h0 = 1 mod y */ |
|
w1 = W_UMALLOC(dg); cpyum(COEF(g)[0],w1); |
|
w2 = W_UMALLOC(dh); cpyum(COEF(h)[0],w2); |
|
wa = W_UMALLOC(2*dx); wb = W_UMALLOC(2*dx); /* XXX */ |
|
eucsfum(w1,w2,wa,wb); |
|
cpyum(wa,COEF(a)[0]); cpyum(wb,COEF(b)[0]); |
|
|
|
/* initialize c to a*g+b*h-1 */ |
|
mulsfbm(a,g,c); mulsfbm(b,h,wz0); addtosfbm(wz0,c); |
|
COEF(COEF(c)[0])[0] = 0; |
|
|
|
if ( debug_sfbfctr) |
|
fprintf(stderr,"dy=%d\n",dy); |
|
for ( k = 1; k <= dy; k++ ) { |
|
if ( debug_sfbfctr) |
|
fprintf(stderr,"."); |
|
|
|
/* at this point, a*g+b*h = 1 mod y^k, c = a*g+b*h-1 */ |
|
|
|
/* wt = -((a*g+b*h-1)/y^k) */ |
|
cpyum(COEF(c)[k],wt); |
|
for ( i = DEG(wt); i >= 0; i-- ) |
|
COEF(wt)[i] = _chsgnsf(COEF(wt)[i]); |
|
|
|
/* compute wa1,wb1 s.t. wa1*g0+wb1*h0 = wt */ |
|
mulsfum(wa,wt,wa1); DEG(wa1) = divsfum(wa1,COEF(h)[0],q); |
|
mulsfum(wa1,COEF(g)[0],wc); subsfum(wt,wc,wd); |
|
DEG(wd) = divsfum(wd,COEF(h)[0],wb1); |
|
|
|
/* c += ((wa1*g+wb1*h)*y^k mod y^(dy+1) */ |
|
/* wz0 = wa1*y^k */ |
|
clearbm(dx,wz0); |
|
cpyum(wa1,COEF(wz0)[k]); |
|
|
|
/* wz1 = wz0*g mod y^(dy+1) */ |
|
clearbm(dx,wz1); |
|
mulsfbm(g,wz0,wz1); |
|
/* c += wz1 */ |
|
addtosfbm(wz1,c); |
|
|
|
/* wz0 = wb1*y^k */ |
|
clearbm(dx,wz0); |
|
cpyum(wb1,COEF(wz0)[k]); |
|
|
|
/* wz1 = wz0*h mod y^(dy+1) */ |
|
clearbm(dx,wz1); |
|
mulsfbm(h,wz0,wz1); |
|
/* c += wz1 */ |
|
addtosfbm(wz1,c); |
|
|
|
/* a += wa1*y^k, b += wb1*y^k */ |
|
cpyum(wa1,COEF(a)[k]); |
|
cpyum(wb1,COEF(b)[k]); |
|
} |
|
if ( debug_sfbfctr) |
|
fprintf(stderr,"\n"); |
|
DEG(a) = dy; |
|
DEG(b) = dy; |
|
*ap = a; |
|
*bp = b; |
|
} |
|
|
/* fl->c[i] = coef_y(f,i) */ |
/* fl->c[i] = coef_y(f,i) */ |
|
|
void ptosfbm(dy,f,fl) |
void ptosfbm(int dy,P f,BM fl) |
int dy; |
|
P f; |
|
BM fl; |
|
{ |
{ |
DCP dc; |
DCP dc; |
int d,i,dx; |
int d,i,dx; |
UM t; |
UM t; |
|
|
dx = QTOS(DEG(DC(f))); |
dx = QTOS(DEG(DC(f))); |
if ( DEG(fl) < dy ) |
if ( DEG(fl) < dy ) |
error("ptosfbm : invalid input"); |
error("ptosfbm : invalid input"); |
DEG(fl) = dy; |
DEG(fl) = dy; |
clearbm(dx,fl); |
clearbm(dx,fl); |
t = UMALLOC(dy); |
t = UMALLOC(dy); |
for ( dc = DC(f); dc; dc = NEXT(dc) ) { |
for ( dc = DC(f); dc; dc = NEXT(dc) ) { |
d = QTOS(DEG(dc)); |
d = QTOS(DEG(dc)); |
ptosfum(COEF(dc),t); |
ptosfum(COEF(dc),t); |
for ( i = 0; i <= DEG(t); i++ ) |
for ( i = 0; i <= DEG(t); i++ ) |
COEF(COEF(fl)[i])[d] = COEF(t)[i]; |
COEF(COEF(fl)[i])[d] = COEF(t)[i]; |
} |
} |
for ( i = 0; i <= dy; i++ ) |
for ( i = 0; i <= dy; i++ ) |
degum(COEF(fl)[i],dx); |
degum(COEF(fl)[i],dx); |
} |
} |
|
|
/* x : main variable */ |
/* x : main variable */ |
|
|
void sfbmtop(f,x,y,fp) |
void sfbmtop(BM f,V x,V y,P *fp) |
BM f; |
|
V x,y; |
|
P *fp; |
|
{ |
{ |
UM *c; |
UM *c; |
int i,j,d,a,dy; |
int i,j,d,a,dy; |
GFS b; |
GFS b; |
DCP dc0,dc,dct; |
DCP dc0,dc,dct; |
|
|
dy = DEG(f); |
dy = DEG(f); |
c = COEF(f); |
c = COEF(f); |
d = degbm(f); |
d = degbm(f); |
|
|
dc0 = 0; |
dc0 = 0; |
for ( i = 0; i <= d; i++ ) { |
for ( i = 0; i <= d; i++ ) { |
dc = 0; |
dc = 0; |
for ( j = 0; j <= dy; j++ ) { |
for ( j = 0; j <= dy; j++ ) { |
if ( DEG(c[j]) >= i && (a = COEF(c[j])[i]) ) { |
if ( DEG(c[j]) >= i && (a = COEF(c[j])[i]) ) { |
NEWDC(dct); |
NEWDC(dct); |
STOQ(j,DEG(dct)); |
STOQ(j,DEG(dct)); |
MKGFS(IFTOF(a),b); |
iftogfs(a,&b); |
COEF(dct) = (P)b; |
COEF(dct) = (P)b; |
NEXT(dct) = dc; |
NEXT(dct) = dc; |
dc = dct; |
dc = dct; |
} |
} |
} |
} |
if ( dc ) { |
if ( dc ) { |
NEWDC(dct); |
NEWDC(dct); |
STOQ(i,DEG(dct)); |
STOQ(i,DEG(dct)); |
MKP(y,dc,COEF(dct)); |
MKP(y,dc,COEF(dct)); |
NEXT(dct) = dc0; |
NEXT(dct) = dc0; |
dc0 = dct; |
dc0 = dct; |
} |
} |
} |
} |
if ( dc0 ) |
if ( dc0 ) |
MKP(x,dc0,*fp); |
MKP(x,dc0,*fp); |
else |
else |
*fp = 0; |
*fp = 0; |
} |
} |
|
|
void sfsqfr(f,dcp) |
void sfsqfr(P f,DCP *dcp) |
P f; |
|
DCP *dcp; |
|
{ |
{ |
P g; |
Obj obj; |
V x; |
DCP dc; |
DCP dc; |
VL vl; |
VL vl; |
|
|
|
simp_ff(f,&g); f = g; |
simp_ff((Obj)f,&obj); f = (P)obj; |
clctv(CO,f,&vl); |
clctv(CO,f,&vl); |
if ( !vl ) { |
if ( !vl ) { |
/* f is a const */ |
/* f is a const */ |
NEWDC(dc); DEG(dc) = ONE; COEF(dc) = f; NEXT(dc) = 0; *dcp = dc; |
NEWDC(dc); DEG(dc) = ONE; COEF(dc) = f; NEXT(dc) = 0; *dcp = dc; |
} else if ( !NEXT(vl) ) |
} else if ( !NEXT(vl) ) |
sfusqfr(f,dcp); |
sfusqfr(f,dcp); |
else if ( !NEXT(NEXT(vl)) ) |
else |
sfbsqfr(f,x,NEXT(vl)->v,dcp); |
sqfrsf(vl,f,dcp); |
else |
|
error("sfsqfr : not implemented yet"); |
|
} |
} |
|
|
void sfusqfr(f,dcp) |
void sfusqfr(P f,DCP *dcp) |
P f; |
|
DCP *dcp; |
|
{ |
{ |
DCP dc,dct; |
DCP dc,dct; |
struct oDUM *udc; |
struct oDUM *udc; |
V x; |
V x; |
P lc; |
P lc; |
int n,i; |
int n,i; |
UM mf; |
UM mf; |
|
|
x = VR(f); |
x = VR(f); |
n = getdeg(x,f); |
n = getdeg(x,f); |
mf = W_UMALLOC(n); |
mf = W_UMALLOC(n); |
ptosfum(f,mf); |
ptosfum(f,mf); |
lc = COEF(DC(f)); |
lc = COEF(DC(f)); |
if ( !_isonesf(COEF(mf)[n]) ) { |
if ( !_isonesf(COEF(mf)[n]) ) { |
monicsfum(mf); |
monicsfum(mf); |
} |
} |
W_CALLOC(n+1,struct oDUM,udc); |
W_CALLOC(n+1,struct oDUM,udc); |
gensqfrsfum(mf,udc); |
gensqfrsfum(mf,udc); |
for ( i = 0, dc = 0; udc[i].f; i++ ) { |
for ( i = 0, dc = 0; udc[i].f; i++ ) { |
NEWDC(dct); STOQ(udc[i].n,DEG(dct)); |
NEWDC(dct); STOQ(udc[i].n,DEG(dct)); |
sfumtop(x,udc[i].f,&COEF(dct)); |
sfumtop(x,udc[i].f,&COEF(dct)); |
NEXT(dct) = dc; dc = dct; |
NEXT(dct) = dc; dc = dct; |
} |
} |
NEWDC(dct); DEG(dct) = ONE; COEF(dct) = (P)lc; NEXT(dct) = dc; |
NEWDC(dct); DEG(dct) = ONE; COEF(dct) = (P)lc; NEXT(dct) = dc; |
*dcp = dct; |
*dcp = dct; |
} |
} |
|
|
void sfbsqfr(f,x,y,dcp) |
#if 0 |
P f; |
void sfbsqfrmain(P f,V x,V y,DCP *dcp) |
V x,y; |
|
DCP *dcp; |
|
{ |
{ |
P t,rf,cx,cy; |
/* XXX*/ |
VL vl,rvl; |
} |
DCP dcx,dcy; |
|
struct oVL vl0,vl1; |
|
|
|
/* vl = [x,y] */ |
/* f is bivariate */ |
vl0.v = x; vl0.next = &vl1; vl1.v = y; vl1.next = 0; vl = &vl0; |
|
/* cy(y) = cont(f,x), f /= cx */ |
|
cont_pp_sfp(vl,f,&cy,&t); f = t; |
|
/* rvl = [y,x] */ |
|
reordvar(vl,y,&rvl); reorderp(rvl,vl,f,&rf); |
|
/* cx(x) = cont(rf,y), Rf /= cy */ |
|
cont_pp_sfp(rvl,rf,&cx,&t); rf = t; |
|
reorderp(vl,rvl,rf,&f); |
|
|
|
/* f -> cx*cy*f */ |
void sfbsqfr(P f,V x,V y,DCP *dcp) |
sfusqfr(cx,&dcx); |
{ |
sfusqfr(cy,&dcy); |
P t,rf,cx,cy; |
|
VL vl,rvl; |
|
DCP dcx,dcy,dct,dc; |
|
struct oVL vl0,vl1; |
|
|
|
/* cy(y) = cont(f,x), f /= cy */ |
|
cont_pp_sfp(vl,f,&cy,&t); f = t; |
|
/* rvl = [y,x] */ |
|
reordvar(vl,y,&rvl); reorderp(rvl,vl,f,&rf); |
|
/* cx(x) = cont(rf,y), Rf /= cy */ |
|
cont_pp_sfp(rvl,rf,&cx,&t); rf = t; |
|
reorderp(vl,rvl,rf,&f); |
|
|
|
/* f -> cx*cy*f */ |
|
sfsqfr(cx,&dcx); dcx = NEXT(dcx); |
|
sfsqfr(cy,&dcy); dcy = NEXT(dcy); |
|
if ( dcx ) { |
|
for ( dct = dcx; NEXT(dct); dct = NEXT(dct) ); |
|
NEXT(dct) = dcy; |
|
} else |
|
dcx = dcy; |
|
if ( OID(f) == O_N ) |
|
*dcp = dcx; |
|
else { |
|
/* f must be bivariate */ |
|
sfbsqfrmain(f,x,y,&dc); |
|
if ( dcx ) { |
|
for ( dct = dcx; NEXT(dct); dct = NEXT(dct) ); |
|
NEXT(dct) = dc; |
|
} else |
|
dcx = dc; |
|
*dcp = dcx; |
|
} |
} |
} |
|
#endif |
|
|
void sfdtest(P,ML,V,V,DCP *); |
void sfdtest(P,ML,V,V,DCP *); |
|
|
void sfbfctr(f,x,y,dcp) |
/* if degbound >= 0 find factor s.t. deg_x(factor) <= degbound */ |
P f; |
|
V x,y; |
void sfbfctr(P f,V x,V y,int degbound,DCP *dcp) |
DCP *dcp; |
|
{ |
{ |
ML list; |
ML list; |
P sf; |
P sf; |
GFS ev; |
GFS ev; |
DCP dc,dct; |
DCP dc,dct; |
BM fl; |
BM fl; |
int dx,dy; |
int dx,dy; |
|
|
/* sf(x) = f(x+ev) = list->c[0]*list->c[1]*... */ |
/* sf(x) = f(x+ev) = list->c[0]*list->c[1]*... */ |
sfhensel(5,f,x,&ev,&sf,&list); |
sfhensel(5,f,x,y,degbound,&ev,&sf,&list); |
if ( list->n == 0 ) |
if ( list->n == 0 ) |
error("sfbfctr : short of evaluation points"); |
error("sfbfctr : short of evaluation points"); |
else if ( list->n == 1 ) { |
else if ( list->n == 1 ) { |
/* f is irreducible */ |
/* f is irreducible */ |
NEWDC(dc); DEG(dc) = ONE; COEF(dc) = f; NEXT(dc) = 0; |
NEWDC(dc); DEG(dc) = ONE; COEF(dc) = f; NEXT(dc) = 0; |
*dcp = dc; |
*dcp = dc; |
return; |
return; |
} |
} |
sfdtest(sf,list,x,y,&dc); |
sfdtest(sf,list,x,y,&dc); |
if ( ev ) { |
if ( ev ) { |
dx = getdeg(x,sf); |
dx = getdeg(x,sf); |
dy = getdeg(y,sf); |
dy = getdeg(y,sf); |
W_BMALLOC(dx,dy,fl); |
W_BMALLOC(dx,dy,fl); |
for ( dct = dc; dct; dct = NEXT(dct) ) { |
for ( dct = dc; dct; dct = NEXT(dct) ) { |
ptosfbm(dy,COEF(dct),fl); |
ptosfbm(dy,COEF(dct),fl); |
shiftsfbm(fl,_chsgnsf(FTOIF(CONT(ev)))); |
shiftsfbm(fl,_chsgnsf(FTOIF(CONT(ev)))); |
sfbmtop(fl,x,y,&COEF(dct)); |
sfbmtop(fl,x,y,&COEF(dct)); |
} |
} |
} |
} |
*dcp = dc; |
*dcp = dc; |
} |
} |
|
|
|
/* returns shifted f, shifted factors and the eval pt */ |
|
|
|
void sfbfctr_shift(P f,V x,V y,int degbound,GFS *evp,P *sfp,DCP *dcp) |
|
{ |
|
ML list; |
|
P sf; |
|
GFS ev; |
|
DCP dc,dct; |
|
int dx,dy; |
|
|
|
/* sf(x) = f(x+ev) = list->c[0]*list->c[1]*... */ |
|
sfhensel(5,f,x,y,degbound,&ev,&sf,&list); |
|
if ( list->n == 0 ) |
|
error("sfbfctr_shift : short of evaluation points"); |
|
else if ( list->n == 1 ) { |
|
/* f is irreducible */ |
|
NEWDC(dc); DEG(dc) = ONE; COEF(dc) = f; NEXT(dc) = 0; |
|
*evp = 0; |
|
*sfp = f; |
|
*dcp = dc; |
|
} else { |
|
sfdtest(sf,list,x,y,dcp); |
|
*evp = ev; |
|
*sfp = sf; |
|
} |
|
} |
|
|
/* f = f(x,y) = list->c[0]*list->c[1]*... mod y^(list->bound+1) */ |
/* f = f(x,y) = list->c[0]*list->c[1]*... mod y^(list->bound+1) */ |
|
|
void sfdtest(f,list,x,y,dcp) |
void sfdtest(P f,ML list,V x,V y,DCP *dcp) |
P f; |
|
ML list; |
|
V x,y; |
|
DCP *dcp; |
|
{ |
{ |
int np,dx,dy; |
int np,dx,dy; |
int i,j,k; |
int i,j,k,bound; |
int *win; |
int *win; |
P g,lcg,factor,cofactor,lcyx; |
P g,lcg,factor,cofactor,lcyx; |
P t,csum; |
P csum; |
DCP dcf,dcf0,dc; |
DCP dcf,dcf0,dc; |
BM *c; |
BM *c; |
BM lcy; |
BM lcy; |
UM lcg0; |
UM lcg0,lcy0,w; |
ML wlist; |
UM *d1c; |
struct oVL vl1,vl0; |
ML wlist; |
VL vl; |
struct oVL vl1,vl0; |
int z; |
VL vl; |
|
int z,dt,dtok; |
|
|
/* vl = [x,y] */ |
/* vl = [x,y] */ |
vl0.v = x; vl0.next = &vl1; vl1.v = y; vl1.next = 0; vl = &vl0; |
vl0.v = x; vl0.next = &vl1; vl1.v = y; vl1.next = 0; vl = &vl0; |
|
|
/* setup various structures and arrays */ |
/* setup various structures and arrays */ |
dx = getdeg(x,f); |
dx = getdeg(x,f); |
dy = getdeg(y,f); |
dy = getdeg(y,f); |
np = list->n; |
np = list->n; |
win = W_ALLOC(np+1); |
win = W_ALLOC(np+1); |
wlist = W_MLALLOC(np); |
wlist = W_MLALLOC(np); |
wlist->n = list->n; |
wlist->n = list->n; |
wlist->bound = dy; |
bound = wlist->bound = list->bound; |
c = (BM *)COEF(wlist); |
c = (BM *)COEF(wlist); |
bcopy((char *)COEF(list),(char *)c,(int)(sizeof(BM)*np)); |
bcopy((char *)COEF(list),(char *)c,(int)(sizeof(BM)*np)); |
|
|
lcg0 = W_UMALLOC(2*dy); |
lcg0 = W_UMALLOC(2*dy); |
|
|
/* initialize g by f */ |
/* initialize g by f */ |
g = f; |
g = f; |
|
|
/* initialize lcg */ |
/* initialize lcg */ |
mulp(vl,g,COEF(DC(g)),&lcg); |
mulp(vl,g,COEF(DC(g)),&lcg); |
|
|
/* initialize lcg0 */ |
/* initialize lcg0 */ |
const_term(lcg,lcg0); |
const_term(lcg,lcg0); |
|
|
/* initialize csum = lcg(1) */ |
/* initialize csum = lcg(1) */ |
sfcsump(vl,lcg,&csum); |
sfcsump(vl,lcg,&csum); |
|
|
/* initialize lcy by LC(f) */ |
/* initialize lcy by LC(f) */ |
W_BMALLOC(0,dy,lcy); |
W_BMALLOC(0,dy,lcy); |
NEWDC(dc); COEF(dc) = COEF(DC(g)); DEG(dc) = 0; |
NEWDC(dc); COEF(dc) = COEF(DC(g)); DEG(dc) = 0; |
NEWP(lcyx); VR(lcyx) = x; DC(lcyx) = dc; |
NEWP(lcyx); VR(lcyx) = x; DC(lcyx) = dc; |
ptosfbm(dy,lcyx,lcy); |
ptosfbm(dy,lcyx,lcy); |
|
|
fprintf(stderr,"np = %d\n",np); |
/* initialize lcy0 by LC(f) */ |
for ( g = f, k = 1, dcf = dcf0 = 0, win[0] = 1, --np, z = 0; ; z++ ) { |
lcy0 = W_UMALLOC(bound); |
if ( !(z % 1000) ) fprintf(stderr,"."); |
ptosfum(COEF(DC(g)),lcy0); |
if ( sfdtestmain(vl,lcg,lcg0,lcy,csum,wlist,k,win,&factor,&cofactor) ) { |
|
NEXTDC(dcf0,dcf); DEG(dcf) = ONE; COEF(dcf) = factor; |
|
g = cofactor; |
|
|
|
/* update lcg */ |
/* ((d-1 coefs)*lcy0 */ |
mulp(vl,g,COEF(DC(g)),&lcg); |
d1c = (UM *)W_ALLOC(np*sizeof(UM)); |
|
w = W_UMALLOC(2*bound); |
|
for ( i = 1; i < np; i++ ) { |
|
extractcoefbm(c[i],degbm(c[i])-1,w); |
|
d1c[i] = W_UMALLOC(2*bound); |
|
mulsfum(w,lcy0,d1c[i]); |
|
/* d1c[i] = d1c[i] mod y^(bound+1) */ |
|
if ( DEG(d1c[i]) > bound ) { |
|
for ( j = DEG(d1c[i]); j > bound; j-- ) |
|
COEF(d1c[i])[j] = 0; |
|
degum(d1c[i],bound); |
|
} |
|
} |
|
|
/* update lcg0 */ |
if ( debug_sfbfctr) |
const_term(lcg,lcg0); |
fprintf(stderr,"np = %d\n",np); |
|
dtok = 0; |
|
for ( g = f, k = 1, dcf = dcf0 = 0, win[0] = 1, --np, z = 0; ; z++ ) { |
|
if ( debug_sfbfctr && !(z % 1000) ) fprintf(stderr,"."); |
|
dt = sfdegtest(dy,bound,d1c,k,win); |
|
if ( dt ) |
|
dtok++; |
|
if ( dt && sfdtestmain(vl,lcg,lcg0,lcy,csum,wlist, |
|
k,win,&factor,&cofactor) ) { |
|
NEXTDC(dcf0,dcf); DEG(dcf) = ONE; COEF(dcf) = factor; |
|
g = cofactor; |
|
|
/* update csum */ |
/* update lcg */ |
sfcsump(vl,lcg,&csum); |
mulp(vl,g,COEF(DC(g)),&lcg); |
|
|
/* update lcy */ |
/* update lcg0 */ |
clearbm(0,lcy); |
const_term(lcg,lcg0); |
COEF(dc) = COEF(DC(g)); |
|
ptosfbm(dy,lcyx,lcy); |
|
|
|
for ( i = 0; i < k - 1; i++ ) |
/* update csum */ |
for ( j = win[i] + 1; j < win[i + 1]; j++ ) |
sfcsump(vl,lcg,&csum); |
c[j-i-1] = c[j]; |
|
for ( j = win[k-1] + 1; j <= np; j++ ) |
/* update dy */ |
c[j-k] = c[j]; |
dy = getdeg(y,g); |
if ( ( np -= k ) < k ) |
|
break; |
/* update lcy */ |
if ( np - win[0] + 1 < k ) |
clearbm(0,lcy); |
if ( ++k > np ) |
COEF(dc) = COEF(DC(g)); |
break; |
ptosfbm(dy,lcyx,lcy); |
else |
|
for ( i = 0; i < k; i++ ) |
for ( i = 0; i < k - 1; i++ ) |
win[i] = i + 1; |
for ( j = win[i] + 1; j < win[i + 1]; j++ ) |
else |
c[j-i-1] = c[j]; |
for ( i = 1; i < k; i++ ) |
for ( j = win[k-1] + 1; j <= np; j++ ) |
win[i] = win[0] + i; |
c[j-k] = c[j]; |
} else if ( !ncombi(1,np,k,win) ) |
if ( ( np -= k ) < k ) |
if ( k == np ) |
break; |
break; |
if ( np - win[0] + 1 < k ) |
else |
if ( ++k > np ) |
for ( i = 0, ++k; i < k; i++ ) |
break; |
win[i] = i + 1; |
else |
} |
for ( i = 0; i < k; i++ ) |
fprintf(stderr,"\n"); |
win[i] = i + 1; |
NEXTDC(dcf0,dcf); COEF(dcf) = g; |
else |
DEG(dcf) = ONE; NEXT(dcf) = 0; *dcp = dcf0; |
for ( i = 1; i < k; i++ ) |
|
win[i] = win[0] + i; |
|
|
|
|
|
/* update lcy0 */ |
|
ptosfum(COEF(DC(g)),lcy0); |
|
|
|
/* update d-1 coeffs */ |
|
for ( i = 1; i <= np; i++ ) { |
|
extractcoefbm(c[i],degbm(c[i])-1,w); |
|
mulsfum(w,lcy0,d1c[i]); |
|
/* d1c[i] = d1c[1] mod y^(bound+1) */ |
|
if ( DEG(d1c[i]) > bound ) { |
|
for ( j = DEG(d1c[i]); j > bound; j-- ) |
|
COEF(d1c[i])[j] = 0; |
|
degum(d1c[i],bound); |
|
} |
|
} |
|
} else if ( !ncombi(1,np,k,win) ) |
|
if ( k == np ) |
|
break; |
|
else |
|
for ( i = 0, ++k; i < k; i++ ) |
|
win[i] = i + 1; |
|
} |
|
if ( debug_sfbfctr ) |
|
fprintf(stderr,"total %d, omitted by degtest %d\n",z,z-dtok); |
|
NEXTDC(dcf0,dcf); COEF(dcf) = g; |
|
DEG(dcf) = ONE; NEXT(dcf) = 0; *dcp = dcf0; |
} |
} |
|
|
|
void extractcoefbm(BM f,int dx,UM r) |
|
{ |
|
int j; |
|
UM fj; |
|
|
|
for ( j = DEG(f); j >= 0; j-- ) { |
|
fj = COEF(f)[j]; |
|
if ( fj && DEG(fj) >= dx ) { |
|
COEF(r)[j] = COEF(fj)[dx]; |
|
} else |
|
COEF(r)[j] = 0; |
|
} |
|
degum(r,DEG(f)); |
|
} |
|
|
|
/* deg_y(prod mod y^(bound+1)) <= dy ? */ |
|
|
|
int sfdegtest(int dy,int bound,UM *d1c,int k,int *in) |
|
{ |
|
int i,j; |
|
UM w,w1,wt; |
|
BM t; |
|
|
|
w = W_UMALLOC(bound); |
|
w1 = W_UMALLOC(bound); |
|
clearum(w,bound); |
|
for ( i = 0; i < k; i++ ) { |
|
addsfum(w,d1c[in[i]],w1); wt = w; w = w1; w1 = wt; |
|
} |
|
return DEG(w) <= dy ? 1 : 0; |
|
} |
|
|
/* lcy = LC(g), lcg = lcy*g, lcg0 = const part of lcg */ |
/* lcy = LC(g), lcg = lcy*g, lcg0 = const part of lcg */ |
int sfdtestmain(vl,lcg,lcg0,lcy,csum,list,k,in,fp,cofp) |
|
VL vl; |
int sfdtestmain(VL vl,P lcg,UM lcg0,BM lcy,P csum,ML list, |
P lcg; |
int k,int *in,P *fp,P *cofp) |
UM lcg0; |
|
BM lcy; |
|
P csum; |
|
ML list; |
|
int k; |
|
int *in; |
|
P *fp,*cofp; |
|
{ |
{ |
P fmul,csumg,q,cont; |
P fmul,csumg,q,cont; |
V x,y; |
V x,y; |
|
|
x = vl->v; |
x = vl->v; |
y = vl->next->v; |
y = vl->next->v; |
if (!sfctest(lcg0,lcy,list,k,in)) |
if (!sfctest(lcg0,lcy,list,k,in)) |
return 0; |
return 0; |
mulsfbmarray(UDEG(lcg),lcy,list,k,in,x,y,&fmul); |
mulsfbmarray(UDEG(lcg),lcy,list,k,in,x,y,&fmul); |
if ( csum ) { |
if ( csum ) { |
sfcsump(vl,fmul,&csumg); |
sfcsump(vl,fmul,&csumg); |
if ( csumg ) { |
if ( csumg ) { |
if ( !divtp(vl,csum,csumg,&q) ) |
if ( !divtp(vl,csum,csumg,&q) ) |
return 0; |
return 0; |
} |
} |
} |
} |
if ( divtp_by_sfbm(vl,lcg,fmul,&q) ) { |
if ( divtp_by_sfbm(vl,lcg,fmul,&q) ) { |
cont_pp_sfp(vl,fmul,&cont,fp); |
cont_pp_sfp(vl,fmul,&cont,fp); |
cont_pp_sfp(vl,q,&cont,cofp); |
cont_pp_sfp(vl,q,&cont,cofp); |
return 1; |
return 1; |
} else |
} else |
return 0; |
return 0; |
} |
} |
|
|
void const_term(f,c) |
void const_term(P f,UM c) |
P f; |
|
UM c; |
|
{ |
{ |
DCP dc; |
DCP dc; |
|
|
for ( dc = DC(f); dc && DEG(dc); dc = NEXT(dc) ); |
for ( dc = DC(f); dc && DEG(dc); dc = NEXT(dc) ); |
if ( dc ) |
if ( dc ) |
ptosfum(COEF(dc),c); |
ptosfum(COEF(dc),c); |
else |
else |
DEG(c) = -1; |
DEG(c) = -1; |
} |
} |
|
|
void const_term_sfbm(f,c) |
void const_term_sfbm(BM f,UM c) |
BM f; |
|
UM c; |
|
{ |
{ |
int i,dy; |
int i,dy; |
|
|
dy = DEG(f); |
dy = DEG(f); |
for ( i = 0; i <= dy; i++ ) |
for ( i = 0; i <= dy; i++ ) |
if ( DEG(COEF(f)[i]) >= 0 ) |
if ( DEG(COEF(f)[i]) >= 0 ) |
COEF(c)[i] = COEF(COEF(f)[i])[0]; |
COEF(c)[i] = COEF(COEF(f)[i])[0]; |
else |
else |
COEF(c)[i] = 0; |
COEF(c)[i] = 0; |
degum(c,dy); |
degum(c,dy); |
} |
} |
|
|
/* lcy*(product of const part) | lcg0 ? */ |
/* lcy*(product of const part) | lcg0 ? */ |
|
|
int sfctest(lcg0,lcy,list,k,in) |
int sfctest(UM lcg0,BM lcy,ML list,int k,int *in) |
UM lcg0; |
|
BM lcy; |
|
ML list; |
|
int k; |
|
int *in; |
|
{ |
{ |
DCP dc; |
int dy,i,dr; |
int dy,i,dr; |
UM t,s,u,w; |
UM t,s,u,w; |
BM *l; |
BM *l; |
|
|
|
dy = list->bound; |
dy = list->bound; |
t = W_UMALLOC(2*dy); |
t = W_UMALLOC(2*dy); |
s = W_UMALLOC(2*dy); |
s = W_UMALLOC(2*dy); |
u = W_UMALLOC(2*dy); |
u = W_UMALLOC(2*dy); |
const_term_sfbm(lcy,t); |
const_term_sfbm(lcy,t); |
if ( DEG(t) < 0 ) |
if ( DEG(t) < 0 ) |
return 1; |
return 1; |
|
|
l = (BM *)list->c; |
l = (BM *)list->c; |
for ( i = 0; i < k; i++ ) { |
for ( i = 0; i < k; i++ ) { |
const_term_sfbm(l[in[i]],s); |
const_term_sfbm(l[in[i]],s); |
mulsfum(t,s,u); |
mulsfum(t,s,u); |
if ( DEG(u) > dy ) |
if ( DEG(u) > dy ) |
degum(u,dy); |
degum(u,dy); |
w = t; t = u; u = w; |
w = t; t = u; u = w; |
} |
} |
cpyum(lcg0,s); |
cpyum(lcg0,s); |
dr = divsfum(s,t,u); |
dr = divsfum(s,t,u); |
if ( dr >= 0 ) |
if ( dr >= 0 ) |
return 0; |
return 0; |
else |
else |
return 1; |
return 1; |
} |
} |
|
|
/* main var of f is x */ |
/* main var of f is x */ |
|
|
void mulsfbmarray(dx,lcy,list,k,in,x,y,g) |
void mulsfbmarray(int dx,BM lcy,ML list,int k,int *in,V x,V y,P *g) |
int dx; |
|
BM lcy; |
|
ML list; |
|
int k; |
|
int *in; |
|
V x,y; |
|
P *g; |
|
{ |
{ |
int dy,i; |
int dy,i; |
BM wb0,wb1,t,lcbm; |
BM wb0,wb1,t; |
BM *l; |
BM *l; |
|
|
dy = list->bound; |
dy = list->bound; |
W_BMALLOC(dx,dy,wb0); W_BMALLOC(dx,dy,wb1); |
W_BMALLOC(dx,dy,wb0); W_BMALLOC(dx,dy,wb1); |
l = (BM *)list->c; |
l = (BM *)list->c; |
clearbm(dx,wb0); |
clearbm(dx,wb0); |
mulsfbm(lcy,l[in[0]],wb0); |
mulsfbm(lcy,l[in[0]],wb0); |
for ( i = 1; i < k; i++ ) { |
for ( i = 1; i < k; i++ ) { |
clearbm(dx,wb1); |
clearbm(dx,wb1); |
mulsfbm(l[in[i]],wb0,wb1); |
mulsfbm(l[in[i]],wb0,wb1); |
t = wb0; wb0 = wb1; wb1 = t; |
t = wb0; wb0 = wb1; wb1 = t; |
} |
} |
sfbmtop(wb0,x,y,g); |
sfbmtop(wb0,x,y,g); |
} |
} |
|
|
void sfcsump(vl,f,s) |
void sfcsump(VL vl,P f,P *s) |
VL vl; |
|
P f; |
|
P *s; |
|
{ |
{ |
P t,u; |
P t,u; |
DCP dc; |
DCP dc; |
|
|
for ( dc = DC(f), t = 0; dc; dc = NEXT(dc) ) { |
for ( dc = DC(f), t = 0; dc; dc = NEXT(dc) ) { |
addp(vl,COEF(dc),t,&u); t = u; |
addp(vl,COEF(dc),t,&u); t = u; |
} |
} |
*s = t; |
*s = t; |
} |
} |
|
|
/* *fp = primitive part of f w.r.t. x */ |
/* *fp = primitive part of f w.r.t. x */ |
|
|
void cont_pp_sfp(vl,f,cp,fp) |
void cont_pp_sfp(VL vl,P f,P *cp,P *fp) |
VL vl; |
|
P f; |
|
P *cp,*fp; |
|
{ |
{ |
V x,y; |
V x,y; |
int d; |
int d; |
UM t,s,gcd; |
UM t,s,gcd; |
DCP dc; |
DCP dc; |
GFS g; |
GFS g; |
|
|
x = vl->v; |
x = vl->v; |
y = vl->next->v; |
y = vl->next->v; |
d = getdeg(y,f); |
d = getdeg(y,f); |
if ( d == 0 ) { |
if ( d == 0 ) { |
MKGFS(0,g); |
itogfs(1,&g); |
*cp = (P)g; |
*cp = (P)g; |
*fp = f; /* XXX */ |
*fp = f; /* XXX */ |
} else { |
} else { |
t = W_UMALLOC(2*d); |
t = W_UMALLOC(2*d); |
s = W_UMALLOC(2*d); |
s = W_UMALLOC(2*d); |
gcd = W_UMALLOC(2*d); |
gcd = W_UMALLOC(2*d); |
dc = DC(f); |
dc = DC(f); |
ptosfum(COEF(dc),gcd); |
ptosfum(COEF(dc),gcd); |
for ( dc = NEXT(dc); dc; dc = NEXT(dc) ) { |
for ( dc = NEXT(dc); dc; dc = NEXT(dc) ) { |
ptosfum(COEF(dc),t); |
ptosfum(COEF(dc),t); |
gcdsfum(gcd,t,s); |
gcdsfum(gcd,t,s); |
cpyum(s,gcd); |
cpyum(s,gcd); |
} |
} |
sfumtop(y,gcd,cp); |
sfumtop(y,gcd,cp); |
divsp(vl,f,*cp,fp); |
divsp(vl,f,*cp,fp); |
} |
} |
} |
} |
|
|
int divtp_by_sfbm(vl,f,g,qp) |
int divtp_by_sfbm(VL vl,P f,P g,P *qp) |
VL vl; |
|
P f,g; |
|
P *qp; |
|
{ |
{ |
V x,y; |
V x,y; |
int fx,fy,gx,gy; |
int fx,fy,gx,gy; |
BM fl,gl,ql; |
BM fl,gl,ql; |
UM *cf,*cg,*cq; |
UM *cf,*cg,*cq; |
UM hg,q,t,s; |
UM hg,q,t,s; |
int i,j,dr; |
int i,j,dr; |
|
|
x = vl->v; y = vl->next->v; |
x = vl->v; y = vl->next->v; |
fx = getdeg(x,f); fy = getdeg(y,f); |
fx = getdeg(x,f); fy = getdeg(y,f); |
gx = getdeg(x,g); gy = getdeg(y,g); |
gx = getdeg(x,g); gy = getdeg(y,g); |
|
|
if ( fx < gx || fy < gy ) |
if ( fx < gx || fy < gy ) |
return 0; |
return 0; |
W_BMALLOC(fx,fy,fl); ptosfbm(fy,f,fl); cf = COEF(fl); |
W_BMALLOC(fx,fy,fl); ptosfbm(fy,f,fl); cf = COEF(fl); |
W_BMALLOC(gx,gy,gl); ptosfbm(gy,g,gl); cg = COEF(gl); |
W_BMALLOC(gx,gy,gl); ptosfbm(gy,g,gl); cg = COEF(gl); |
W_BMALLOC(fx-gx,fy-gy,ql); cq = COEF(ql); |
W_BMALLOC(fx-gx,fy-gy,ql); cq = COEF(ql); |
|
|
hg = cg[gy]; |
hg = cg[gy]; |
q = W_UMALLOC(fx); t = W_UMALLOC(fx); s = W_UMALLOC(fx); |
q = W_UMALLOC(fx); t = W_UMALLOC(fx); s = W_UMALLOC(fx); |
|
|
for ( i = fy; i >= gy; i-- ) { |
for ( i = fy; i >= gy; i-- ) { |
if ( DEG(cf[i]) < 0 ) |
if ( DEG(cf[i]) < 0 ) |
continue; |
continue; |
dr = divsfum(cf[i],hg,q); |
dr = divsfum(cf[i],hg,q); |
if ( dr >= 0 ) |
if ( dr >= 0 ) |
return 0; |
return 0; |
if ( DEG(q) > fx-gx ) |
if ( DEG(q) > fx-gx ) |
return 0; |
return 0; |
cpyum(q,cq[i-gy]); |
cpyum(q,cq[i-gy]); |
for ( j = 0; j <= gy; j++ ) { |
for ( j = 0; j <= gy; j++ ) { |
mulsfum(cg[j],q,t); |
mulsfum(cg[j],q,t); |
subsfum(cf[j+i-gy],t,s); |
subsfum(cf[j+i-gy],t,s); |
cpyum(s,cf[j+i-gy]); |
cpyum(s,cf[j+i-gy]); |
} |
} |
} |
} |
for ( j = gy-1; j >= 0 && DEG(cf[j]) < 0; j-- ); |
for ( j = gy-1; j >= 0 && DEG(cf[j]) < 0; j-- ); |
if ( j >= 0 ) |
if ( j >= 0 ) |
return 0; |
return 0; |
sfbmtop(ql,x,y,qp); |
sfbmtop(ql,x,y,qp); |
|
return 1; |
|
} |
|
|
|
/* XXX generate an irreducible poly of degree n */ |
|
|
|
extern int current_gfs_q1; |
|
extern int *current_gfs_ntoi; |
|
|
|
void generate_defpoly_sfum(int n,UM *dp) |
|
{ |
|
UM r,dr,t,g; |
|
UM *f; |
|
int *c,*w; |
|
int max,i,j; |
|
|
|
*dp = r = UMALLOC(n); |
|
DEG(r) = n; |
|
c = COEF(r); |
|
c[n] = _onesf(); |
|
max = current_gfs_q1; |
|
w = (int *)ALLOCA(n*sizeof(int)); |
|
bzero(w,n*sizeof(int)); |
|
|
|
dr = W_UMALLOC(n); t = W_UMALLOC(n); g = W_UMALLOC(n); |
|
f = (UM *)ALLOCA((n+1)*sizeof(UM)); |
|
while ( 1 ) { |
|
for ( i = 0; i < n && w[i] == max; i++ ); |
|
if ( i == n ) { |
|
/* XXX cannot happen */ |
|
error("generate_defpoly_sfum : cannot happen"); |
|
} |
|
for ( j = 0; j < i; j++ ) |
|
w[j] = 0; |
|
w[i]++; |
|
if ( !current_gfs_ntoi ) |
|
for ( i = 0; i < n; i++ ) |
|
c[i] = w[i]?FTOIF(w[i]):0; |
|
else |
|
for ( i = 0; i < n; i++ ) |
|
c[i] = w[i]?FTOIF(w[i]-1):0; |
|
if ( !c[0] ) |
|
continue; |
|
diffsfum(r,dr); cpyum(r,t); gcdsfum(t,dr,g); |
|
if ( DEG(g) > 0 ) |
|
continue; |
|
|
|
czsfum(r,f); |
|
for ( i = 0; f[i]; i++ ); |
|
if ( i == 1 ) |
|
return; |
|
} |
} |
} |