version 1.37, 2004/09/15 06:06:42 |
version 1.47, 2007/10/14 02:32:21 |
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* DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE, |
* DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE, |
* PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE. |
* PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE. |
* |
* |
* $OpenXM: OpenXM_contrib2/asir2000/builtin/dp-supp.c,v 1.36 2004/05/14 09:20:56 noro Exp $ |
* $OpenXM: OpenXM_contrib2/asir2000/builtin/dp-supp.c,v 1.46 2007/09/19 05:42:59 noro Exp $ |
*/ |
*/ |
#include "ca.h" |
#include "ca.h" |
#include "base.h" |
#include "base.h" |
Line 71 void print_composite_order_spec(struct order_spec *spe |
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Line 71 void print_composite_order_spec(struct order_spec *spe |
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* |
* |
*/ |
*/ |
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static NODE RatDenomList; |
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void init_denomlist() |
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{ |
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RatDenomList = 0; |
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} |
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void add_denomlist(P f) |
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{ |
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NODE n; |
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if ( OID(f)==O_P ) { |
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MKNODE(n,f,RatDenomList); RatDenomList = n; |
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} |
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} |
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LIST get_denomlist() |
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{ |
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LIST l; |
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MKLIST(l,RatDenomList); RatDenomList = 0; |
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return l; |
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} |
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void dp_ptozp(DP p,DP *rp) |
void dp_ptozp(DP p,DP *rp) |
{ |
{ |
MP m,mr,mr0; |
MP m,mr,mr0; |
Line 122 void dp_ptozp2(DP p0,DP p1,DP *hp,DP *rp) |
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Line 146 void dp_ptozp2(DP p0,DP p1,DP *hp,DP *rp) |
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*hp = h; *rp = r; |
*hp = h; *rp = r; |
} |
} |
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void dp_ptozp3(DP p,Q *dvr,DP *rp) |
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{ |
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MP m,mr,mr0; |
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int i,n; |
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Q *w; |
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P t; |
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if ( !p ) { |
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*rp = 0; *dvr = 0; |
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}else { |
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for ( m =BDY(p), n = 0; m; m = NEXT(m), n++ ); |
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w = (Q *)ALLOCA(n*sizeof(Q)); |
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for ( m =BDY(p), i = 0; i < n; m = NEXT(m), i++ ) |
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if ( NUM(m->c) ) |
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w[i] = (Q)m->c; |
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else |
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ptozp(m->c,1,&w[i],&t); |
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sortbynm(w,n); |
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qltozl(w,n,dvr); |
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for ( mr0 = 0, m = BDY(p); m; m = NEXT(m) ) { |
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NEXTMP(mr0,mr); divsp(CO,m->c,(P)(*dvr),&mr->c); mr->dl = m->dl; |
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} |
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NEXT(mr) = 0; MKDP(p->nv,mr0,*rp); (*rp)->sugar = p->sugar; |
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} |
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} |
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void dp_idiv(DP p,Q c,DP *rp) |
void dp_idiv(DP p,Q c,DP *rp) |
{ |
{ |
Q t; |
Q t; |
Line 422 void dp_prim(DP p,DP *rp) |
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Line 472 void dp_prim(DP p,DP *rp) |
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P *w; |
P *w; |
Q *c; |
Q *c; |
Q dvr; |
Q dvr; |
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NODE tn; |
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if ( !p ) |
if ( !p ) |
*rp = 0; |
*rp = 0; |
Line 476 void dp_prim(DP p,DP *rp) |
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Line 527 void dp_prim(DP p,DP *rp) |
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NEXTMP(mr0,mr); divsp(CO,m->c,g,&mr->c); mr->dl = m->dl; |
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; |
NEXT(mr) = 0; MKDP(p->nv,mr0,*rp); (*rp)->sugar = p->sugar; |
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add_denomlist(g); |
} |
} |
} |
} |
} |
} |
Line 485 void heu_nezgcdnpz(VL vl,P *pl,int m,P *pr) |
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Line 537 void heu_nezgcdnpz(VL vl,P *pl,int m,P *pr) |
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int i,r; |
int i,r; |
P gcd,t,s1,s2,u; |
P gcd,t,s1,s2,u; |
Q rq; |
Q rq; |
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DCP dc; |
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extern int DP_Print; |
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while ( 1 ) { |
while ( 1 ) { |
for ( i = 0, s1 = 0; i < m; i++ ) { |
for ( i = 0, s1 = 0; i < m; i++ ) { |
r = random(); UTOQ(r,rq); |
r = random(); UTOQ(r,rq); |
Line 496 void heu_nezgcdnpz(VL vl,P *pl,int m,P *pr) |
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Line 550 void heu_nezgcdnpz(VL vl,P *pl,int m,P *pr) |
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mulp(vl,pl[i],(P)rq,&t); addp(vl,s2,t,&u); s2 = u; |
mulp(vl,pl[i],(P)rq,&t); addp(vl,s2,t,&u); s2 = u; |
} |
} |
ezgcdp(vl,s1,s2,&gcd); |
ezgcdp(vl,s1,s2,&gcd); |
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if ( DP_Print > 2 ) |
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{ fprintf(asir_out,"(%d)",nmonop(gcd)); fflush(asir_out); } |
for ( i = 0; i < m; i++ ) { |
for ( i = 0; i < m; i++ ) { |
if ( !divtpz(vl,pl[i],gcd,&t) ) |
if ( !divtpz(vl,pl[i],gcd,&t) ) |
break; |
break; |
Line 775 void dp_red(DP p0,DP p1,DP p2,DP *head,DP *rest,P *dnp |
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Line 831 void dp_red(DP p0,DP p1,DP p2,DP *head,DP *rest,P *dnp |
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} else { |
} else { |
ezgcdpz(CO,(P)c1,(P)c2,&g); |
ezgcdpz(CO,(P)c1,(P)c2,&g); |
divsp(CO,(P)c1,g,&a); c1 = (Q)a; divsp(CO,(P)c2,g,&a); c2 = (Q)a; |
divsp(CO,(P)c1,g,&a); c1 = (Q)a; divsp(CO,(P)c2,g,&a); c2 = (Q)a; |
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add_denomlist(g); |
} |
} |
NEWMP(m); m->dl = d; chsgnp((P)c1,&m->c); NEXT(m) = 0; MKDP(n,m,s); s->sugar = d->td; |
NEWMP(m); m->dl = d; chsgnp((P)c1,&m->c); NEXT(m) = 0; MKDP(n,m,s); s->sugar = d->td; |
*multp = s; |
*multp = s; |
Line 783 void dp_red(DP p0,DP p1,DP p2,DP *head,DP *rest,P *dnp |
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Line 840 void dp_red(DP p0,DP p1,DP p2,DP *head,DP *rest,P *dnp |
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*head = h; *rest = r; *dnp = (P)c2; |
*head = h; *rest = r; *dnp = (P)c2; |
} |
} |
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/* |
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* m-reduction by a marked poly |
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* do content reduction over Z or Q(x,...) |
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* do nothing over finite fields |
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* |
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*/ |
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void dp_red_marked(DP p0,DP p1,DP p2,DP hp2,DP *head,DP *rest,P *dnp,DP *multp) |
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{ |
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int i,n; |
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DL d1,d2,d; |
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MP m; |
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DP t,s,r,h; |
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Q c,c1,c2; |
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N gn,tn; |
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P g,a; |
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P p[2]; |
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n = p1->nv; d1 = BDY(p1)->dl; d2 = BDY(hp2)->dl; |
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NEWDL(d,n); d->td = d1->td - d2->td; |
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for ( i = 0; i < n; i++ ) |
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d->d[i] = d1->d[i]-d2->d[i]; |
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c1 = (Q)BDY(p1)->c; c2 = (Q)BDY(hp2)->c; |
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if ( dp_fcoeffs == N_GFS ) { |
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p[0] = (P)c1; p[1] = (P)c2; |
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gcdsf(CO,p,2,&g); |
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divsp(CO,(P)c1,g,&a); c1 = (Q)a; divsp(CO,(P)c2,g,&a); c2 = (Q)a; |
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} else if ( dp_fcoeffs ) { |
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/* do nothing */ |
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} else if ( INT(c1) && INT(c2) ) { |
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gcdn(NM(c1),NM(c2),&gn); |
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if ( !UNIN(gn) ) { |
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divsn(NM(c1),gn,&tn); NTOQ(tn,SGN(c1),c); c1 = c; |
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divsn(NM(c2),gn,&tn); NTOQ(tn,SGN(c2),c); c2 = c; |
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} |
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} else { |
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ezgcdpz(CO,(P)c1,(P)c2,&g); |
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divsp(CO,(P)c1,g,&a); c1 = (Q)a; divsp(CO,(P)c2,g,&a); c2 = (Q)a; |
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} |
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NEWMP(m); m->dl = d; m->c = (P)c1; NEXT(m) = 0; MKDP(n,m,s); s->sugar = d->td; |
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*multp = s; |
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muld(CO,s,p2,&t); muldc(CO,p1,(P)c2,&s); subd(CO,s,t,&r); |
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muldc(CO,p0,(P)c2,&h); |
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*head = h; *rest = r; *dnp = (P)c2; |
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} |
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void dp_red_marked_mod(DP p0,DP p1,DP p2,DP hp2,int mod,DP *head,DP *rest,P *dnp) |
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{ |
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int i,n; |
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DL d1,d2,d; |
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MP m; |
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DP t,s,r,h; |
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P c1,c2,g,u; |
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n = p1->nv; d1 = BDY(p1)->dl; d2 = BDY(hp2)->dl; |
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NEWDL(d,n); d->td = d1->td - d2->td; |
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for ( i = 0; i < n; i++ ) |
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d->d[i] = d1->d[i]-d2->d[i]; |
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c1 = (P)BDY(p1)->c; c2 = (P)BDY(hp2)->c; |
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gcdprsmp(CO,mod,c1,c2,&g); |
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divsmp(CO,mod,c1,g,&u); c1 = u; divsmp(CO,mod,c2,g,&u); c2 = u; |
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if ( NUM(c2) ) { |
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divsmp(CO,mod,c1,c2,&u); c1 = u; c2 = (P)ONEM; |
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} |
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NEWMP(m); m->dl = d; chsgnmp(mod,(P)c1,&m->c); NEXT(m) = 0; |
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MKDP(n,m,s); s->sugar = d->td; mulmd(CO,mod,s,p2,&t); |
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if ( NUM(c2) ) { |
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addmd(CO,mod,p1,t,&r); h = p0; |
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} else { |
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mulmdc(CO,mod,p1,c2,&s); addmd(CO,mod,s,t,&r); mulmdc(CO,mod,p0,c2,&h); |
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} |
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*head = h; *rest = r; *dnp = c2; |
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} |
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/* m-reduction over a field */ |
/* m-reduction over a field */ |
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void dp_red_f(DP p1,DP p2,DP *rest) |
void dp_red_f(DP p1,DP p2,DP *rest) |
Line 931 void dp_true_nf(NODE b,DP g,DP *ps,int full,DP *rp,P * |
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Line 1063 void dp_true_nf(NODE b,DP g,DP *ps,int full,DP *rp,P * |
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*rp = d; *dnp = dn; |
*rp = d; *dnp = dn; |
} |
} |
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void dp_removecont2(DP p1,DP p2,DP *r1p,DP *r2p,Q *contp) |
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{ |
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struct oVECT v; |
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int i,n1,n2,n; |
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MP m,m0,t; |
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Q *w; |
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Q h; |
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if ( p1 ) { |
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for ( i = 0, m = BDY(p1); m; m = NEXT(m), i++ ); |
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n1 = i; |
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} else |
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n1 = 0; |
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if ( p2 ) { |
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for ( i = 0, m = BDY(p2); m; m = NEXT(m), i++ ); |
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n2 = i; |
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} else |
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n2 = 0; |
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n = n1+n2; |
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if ( !n ) { |
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*r1p = 0; *r2p = 0; *contp = ONE; return; |
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} |
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w = (Q *)ALLOCA(n*sizeof(Q)); |
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v.len = n; |
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v.body = (pointer *)w; |
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i = 0; |
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if ( p1 ) |
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for ( m = BDY(p1); i < n1; m = NEXT(m), i++ ) w[i] = (Q)m->c; |
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if ( p2 ) |
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for ( m = BDY(p2); i < n; m = NEXT(m), i++ ) w[i] = (Q)m->c; |
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h = w[0]; removecont_array((P *)w,n,1); divq(h,w[0],contp); |
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i = 0; |
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if ( p1 ) { |
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for ( m0 = 0, t = BDY(p1); i < n1; i++, t = NEXT(t) ) { |
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NEXTMP(m0,m); m->c = (P)w[i]; m->dl = t->dl; |
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} |
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NEXT(m) = 0; |
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MKDP(p1->nv,m0,*r1p); (*r1p)->sugar = p1->sugar; |
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} else |
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*r1p = 0; |
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if ( p2 ) { |
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for ( m0 = 0, t = BDY(p2); i < n; i++, t = NEXT(t) ) { |
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NEXTMP(m0,m); m->c = (P)w[i]; m->dl = t->dl; |
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} |
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NEXT(m) = 0; |
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MKDP(p2->nv,m0,*r2p); (*r2p)->sugar = p2->sugar; |
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} else |
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*r2p = 0; |
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} |
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/* true nf by a marked GB */ |
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void dp_true_nf_marked(NODE b,DP g,DP *ps,DP *hps,DP *rp,P *nmp,P *dnp) |
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{ |
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DP u,p,d,s,t,dmy,hp; |
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NODE l; |
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MP m,mr; |
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int i,n,hmag; |
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int *wb; |
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int sugar,psugar,multiple; |
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P nm,tnm1,dn,tdn,tdn1; |
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Q cont; |
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multiple = 0; |
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hmag = multiple*HMAG(g); |
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nm = (P)ONE; |
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dn = (P)ONE; |
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if ( !g ) { |
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*rp = 0; *dnp = dn; return; |
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} |
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for ( n = 0, l = b; l; l = NEXT(l), n++ ); |
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wb = (int *)ALLOCA(n*sizeof(int)); |
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for ( i = 0, l = b; i < n; l = NEXT(l), i++ ) |
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wb[i] = QTOS((Q)BDY(l)); |
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sugar = g->sugar; |
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for ( d = 0; g; ) { |
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for ( u = 0, i = 0; i < n; i++ ) { |
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if ( dp_redble(g,hp = hps[wb[i]]) ) { |
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p = ps[wb[i]]; |
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dp_red_marked(d,g,p,hp,&t,&u,&tdn,&dmy); |
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psugar = (BDY(g)->dl->td - BDY(p)->dl->td) + p->sugar; |
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sugar = MAX(sugar,psugar); |
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if ( !u ) { |
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goto last; |
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} else { |
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d = t; |
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mulp(CO,dn,tdn,&tdn1); dn = tdn1; |
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} |
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break; |
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} |
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} |
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if ( u ) { |
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g = u; |
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if ( multiple && ((d && HMAG(d)>hmag) || (HMAG(g)>hmag)) ) { |
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dp_removecont2(d,g,&t,&u,&cont); d = t; g = u; |
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mulp(CO,nm,(P)cont,&tnm1); nm = tnm1; |
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if ( d ) |
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hmag = multiple*HMAG(d); |
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else |
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hmag = multiple*HMAG(g); |
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} |
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} else { |
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m = BDY(g); NEWMP(mr); mr->dl = m->dl; mr->c = m->c; |
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NEXT(mr) = 0; MKDP(g->nv,mr,t); t->sugar = mr->dl->td; |
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addd(CO,d,t,&s); d = s; |
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dp_rest(g,&t); g = t; |
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} |
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} |
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last: |
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if ( d ) { |
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dp_removecont2(d,0,&t,&u,&cont); d = t; |
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mulp(CO,nm,(P)cont,&tnm1); nm = tnm1; |
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d->sugar = sugar; |
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} |
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*rp = d; *nmp = nm; *dnp = dn; |
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} |
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void dp_true_nf_marked_mod(NODE b,DP g,DP *ps,DP *hps,int mod,DP *rp,P *dnp) |
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{ |
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DP hp,u,p,d,s,t; |
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NODE l; |
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MP m,mr; |
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int i,n; |
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int *wb; |
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int sugar,psugar; |
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P dn,tdn,tdn1; |
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dn = (P)ONEM; |
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if ( !g ) { |
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*rp = 0; *dnp = dn; return; |
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} |
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for ( n = 0, l = b; l; l = NEXT(l), n++ ); |
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wb = (int *)ALLOCA(n*sizeof(int)); |
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for ( i = 0, l = b; i < n; l = NEXT(l), i++ ) |
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wb[i] = QTOS((Q)BDY(l)); |
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sugar = g->sugar; |
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for ( d = 0; g; ) { |
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for ( u = 0, i = 0; i < n; i++ ) { |
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if ( dp_redble(g,hp = hps[wb[i]]) ) { |
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p = ps[wb[i]]; |
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dp_red_marked_mod(d,g,p,hp,mod,&t,&u,&tdn); |
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psugar = (BDY(g)->dl->td - BDY(p)->dl->td) + p->sugar; |
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sugar = MAX(sugar,psugar); |
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if ( !u ) { |
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if ( d ) |
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d->sugar = sugar; |
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*rp = d; *dnp = dn; return; |
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} else { |
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d = t; |
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mulmp(CO,mod,dn,tdn,&tdn1); dn = tdn1; |
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} |
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break; |
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} |
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} |
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if ( u ) |
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g = u; |
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else { |
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m = BDY(g); NEWMP(mr); mr->dl = m->dl; mr->c = m->c; |
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NEXT(mr) = 0; MKDP(g->nv,mr,t); t->sugar = mr->dl->td; |
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addmd(CO,mod,d,t,&s); d = s; |
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dp_rest(g,&t); g = t; |
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} |
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} |
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if ( d ) |
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d->sugar = sugar; |
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*rp = d; *dnp = dn; |
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} |
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/* true nf by a marked GB and collect quotients */ |
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DP *dp_true_nf_and_quotient_marked (NODE b,DP g,DP *ps,DP *hps,DP *rp,P *dnp) |
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{ |
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DP u,p,d,s,t,dmy,hp,mult; |
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DP *q; |
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NODE l; |
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MP m,mr; |
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int i,n,j; |
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int *wb; |
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int sugar,psugar,multiple; |
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P nm,tnm1,dn,tdn,tdn1; |
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Q cont; |
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dn = (P)ONE; |
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if ( !g ) { |
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*rp = 0; *dnp = dn; return; |
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} |
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for ( n = 0, l = b; l; l = NEXT(l), n++ ); |
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wb = (int *)ALLOCA(n*sizeof(int)); |
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for ( i = 0, l = b; i < n; l = NEXT(l), i++ ) |
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wb[i] = QTOS((Q)BDY(l)); |
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q = (DP *)MALLOC(n*sizeof(DP)); |
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for ( i = 0; i < n; i++ ) q[i] = 0; |
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sugar = g->sugar; |
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for ( d = 0; g; ) { |
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for ( u = 0, i = 0; i < n; i++ ) { |
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if ( dp_redble(g,hp = hps[wb[i]]) ) { |
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p = ps[wb[i]]; |
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dp_red_marked(d,g,p,hp,&t,&u,&tdn,&mult); |
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psugar = (BDY(g)->dl->td - BDY(p)->dl->td) + p->sugar; |
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sugar = MAX(sugar,psugar); |
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for ( j = 0; j < n; j++ ) { |
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muldc(CO,q[j],(P)tdn,&dmy); q[j] = dmy; |
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} |
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addd(CO,q[wb[i]],mult,&dmy); q[wb[i]] = dmy; |
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mulp(CO,dn,tdn,&tdn1); dn = tdn1; |
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d = t; |
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if ( !u ) goto last; |
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break; |
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} |
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} |
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if ( u ) { |
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g = u; |
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} else { |
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m = BDY(g); NEWMP(mr); mr->dl = m->dl; mr->c = m->c; |
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NEXT(mr) = 0; MKDP(g->nv,mr,t); t->sugar = mr->dl->td; |
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addd(CO,d,t,&s); d = s; |
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dp_rest(g,&t); g = t; |
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} |
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} |
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last: |
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if ( d ) d->sugar = sugar; |
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*rp = d; *dnp = dn; |
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return q; |
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} |
|
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/* nf computation over Z */ |
/* nf computation over Z */ |
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void dp_nf_z(NODE b,DP g,DP *ps,int full,int multiple,DP *rp) |
void dp_nf_z(NODE b,DP g,DP *ps,int full,int multiple,DP *rp) |
Line 1414 void print_composite_order_spec(struct order_spec *spe |
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Line 1771 void print_composite_order_spec(struct order_spec *spe |
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} |
} |
} |
} |
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struct order_spec *append_block(struct order_spec *spec, |
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int nv,int nalg,int ord) |
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{ |
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MAT m,mat; |
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int i,j,row,col,n; |
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Q **b,**wp; |
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int **w; |
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NODE t,s,s0; |
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struct order_pair *l,*l0; |
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int n0,nv0; |
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LIST list0,list1,list; |
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Q oq,nq; |
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struct order_spec *r; |
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r = (struct order_spec *)MALLOC(sizeof(struct order_spec)); |
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switch ( spec->id ) { |
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case 0: |
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STOQ(spec->ord.simple,oq); STOQ(nv,nq); |
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t = mknode(2,oq,nq); MKLIST(list0,t); |
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STOQ(ord,oq); STOQ(nalg,nq); |
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t = mknode(2,oq,nq); MKLIST(list1,t); |
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t = mknode(2,list0,list1); MKLIST(list,t); |
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l = (struct order_pair *)MALLOC_ATOMIC(2*sizeof(struct order_pair)); |
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l[0].order = spec->ord.simple; l[0].length = nv; |
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l[1].order = ord; l[1].length = nalg; |
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r->id = 1; r->obj = (Obj)list; |
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r->ord.block.order_pair = l; |
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r->ord.block.length = 2; |
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r->nv = nv+nalg; |
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break; |
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case 1: |
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if ( spec->nv != nv ) |
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error("append_block : number of variables mismatch"); |
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l0 = spec->ord.block.order_pair; |
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n0 = spec->ord.block.length; |
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nv0 = spec->nv; |
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list0 = (LIST)spec->obj; |
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n = n0+1; |
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l = (struct order_pair *)MALLOC_ATOMIC(n*sizeof(struct order_pair)); |
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for ( i = 0; i < n0; i++ ) |
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l[i] = l0[i]; |
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l[i].order = ord; l[i].length = nalg; |
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for ( t = BDY(list0), s0 = 0; t; t = NEXT(t) ) { |
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NEXTNODE(s0,s); BDY(s) = BDY(t); |
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} |
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STOQ(ord,oq); STOQ(nalg,nq); |
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t = mknode(2,oq,nq); MKLIST(list,t); |
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NEXTNODE(s0,s); BDY(s) = (pointer)list; NEXT(s) = 0; |
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MKLIST(list,s0); |
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r->id = 1; r->obj = (Obj)list; |
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r->ord.block.order_pair = l; |
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r->ord.block.length = n; |
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r->nv = nv+nalg; |
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break; |
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case 2: |
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if ( spec->nv != nv ) |
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error("append_block : number of variables mismatch"); |
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m = (MAT)spec->obj; |
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row = m->row; col = m->col; b = (Q **)BDY(m); |
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w = almat(row+nalg,col+nalg); |
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MKMAT(mat,row+nalg,col+nalg); wp = (Q **)BDY(mat); |
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for ( i = 0; i < row; i++ ) |
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for ( j = 0; j < col; j++ ) { |
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w[i][j] = QTOS(b[i][j]); |
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wp[i][j] = b[i][j]; |
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} |
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for ( i = 0; i < nalg; i++ ) { |
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w[i+row][i+col] = 1; |
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wp[i+row][i+col] = ONE; |
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} |
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r->id = 2; r->obj = (Obj)mat; |
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r->nv = col+nalg; r->ord.matrix.row = row+nalg; |
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r->ord.matrix.matrix = w; |
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break; |
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case 3: |
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default: |
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/* XXX */ |
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error("append_block : not implemented yet"); |
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} |
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return r; |
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} |
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int comp_sw(struct sparse_weight *a, struct sparse_weight *b) |
int comp_sw(struct sparse_weight *a, struct sparse_weight *b) |
{ |
{ |
if ( a->pos > b->pos ) return 1; |
if ( a->pos > b->pos ) return 1; |
Line 2234 int dpv_ht(DPV p,DP *h) |
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Line 2673 int dpv_ht(DPV p,DP *h) |
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MKDP(e[maxi]->nv,mr,*h); (*h)->sugar = mr->dl->td; /* XXX */ |
MKDP(e[maxi]->nv,mr,*h); (*h)->sugar = mr->dl->td; /* XXX */ |
return maxi; |
return maxi; |
} |
} |
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} |
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/* return 1 if 0 <_w1 v && v <_w2 0 */ |
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int in_c12(int n,int *v,int row1,int **w1,int row2, int **w2) |
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{ |
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int t1,t2; |
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t1 = compare_zero(n,v,row1,w1); |
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t2 = compare_zero(n,v,row2,w2); |
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if ( t1 > 0 && t2 < 0 ) return 1; |
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else return 0; |
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} |
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/* 0 < u => 1, 0 > u => -1 */ |
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int compare_zero(int n,int *u,int row,int **w) |
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{ |
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int i,j,t; |
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int *wi; |
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for ( i = 0; i < row; i++ ) { |
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wi = w[i]; |
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for ( j = 0, t = 0; j < n; j++ ) t += u[j]*wi[j]; |
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if ( t > 0 ) return 1; |
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else if ( t < 0 ) return -1; |
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} |
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return 0; |
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} |
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/* functions for generic groebner walk */ |
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/* u=0 means u=-infty */ |
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int compare_facet_preorder(int n,int *u,int *v, |
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int row1,int **w1,int row2,int **w2) |
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{ |
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int i,j,s,t,tu,tv; |
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int *w2i,*uv; |
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if ( !u ) return 1; |
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uv = W_ALLOC(n); |
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for ( i = 0; i < row2; i++ ) { |
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w2i = w2[i]; |
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for ( j = 0, tu = tv = 0; j < n; j++ ) |
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if ( s = w2i[j] ) { |
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tu += s*u[j]; tv += s*v[j]; |
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} |
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for ( j = 0; j < n; j++ ) uv[j] = u[j]*tv-v[j]*tu; |
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t = compare_zero(n,uv,row1,w1); |
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if ( t > 0 ) return 1; |
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else if ( t < 0 ) return 0; |
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} |
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return 1; |
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} |
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/* return 0 if last_w = infty */ |
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NODE compute_last_w(NODE g,NODE gh,int n,int **w, |
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int row1,int **w1,int row2,int **w2) |
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{ |
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DP d; |
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MP f,m0,m; |
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int *wt,*v,*h; |
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NODE t,s,n0,tn,n1,r0,r; |
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int i; |
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wt = W_ALLOC(n); |
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n0 = 0; |
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for ( t = g, s = gh; t; t = NEXT(t), s = NEXT(s) ) { |
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f = BDY((DP)BDY(t)); |
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h = BDY((DP)BDY(s))->dl->d; |
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for ( ; f; f = NEXT(f) ) { |
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for ( i = 0; i < n; i++ ) wt[i] = h[i]-f->dl->d[i]; |
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for ( i = 0; i < n && !wt[i]; i++ ); |
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if ( i == n ) continue; |
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if ( in_c12(n,wt,row1,w1,row2,w2) && |
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compare_facet_preorder(n,*w,wt,row1,w1,row2,w2) ) { |
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v = (int *)MALLOC_ATOMIC(n*sizeof(int)); |
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for ( i = 0; i < n; i++ ) v[i] = wt[i]; |
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MKNODE(n1,v,n0); n0 = n1; |
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} |
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} |
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} |
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if ( !n0 ) return 0; |
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for ( t = n0; t; t = NEXT(t) ) { |
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v = (int *)BDY(t); |
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for ( s = n0; s; s = NEXT(s) ) |
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if ( !compare_facet_preorder(n,v,(int *)BDY(s),row1,w1,row2,w2) ) |
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break; |
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if ( !s ) { |
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*w = v; |
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break; |
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} |
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} |
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if ( !t ) |
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error("compute_last_w : cannot happen"); |
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r0 = 0; |
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for ( t = g, s = gh; t; t = NEXT(t), s = NEXT(s) ) { |
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f = BDY((DP)BDY(t)); |
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h = BDY((DP)BDY(s))->dl->d; |
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for ( m0 = 0; f; f = NEXT(f) ) { |
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for ( i = 0; i < n; i++ ) wt[i] = h[i]-f->dl->d[i]; |
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for ( i = 0; i < n && !wt[i]; i++ ); |
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if ( i == n || |
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(compare_facet_preorder(n,wt,*w,row1,w1,row2,w2) |
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&& compare_facet_preorder(n,*w,wt,row1,w1,row2,w2)) ) { |
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NEXTMP(m0,m); m->c = f->c; m->dl = f->dl; |
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} |
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} |
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NEXT(m) = 0; |
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MKDP(((DP)BDY(t))->nv,m0,d); d->sugar = ((DP)BDY(t))->sugar; |
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NEXTNODE(r0,r); BDY(r) = (pointer)d; |
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} |
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NEXT(r) = 0; |
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return r0; |
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} |
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/* compute a sufficient set of d(f)=u-v */ |
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NODE compute_essential_df(DP *g,DP *gh,int ng) |
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{ |
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int nv,i,j,k,t,lj; |
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NODE r,r1,ri,rt,r0; |
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MP m; |
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MP *mj; |
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DL di,hj,dl,dlt; |
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int *d,*dt; |
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LIST l; |
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Q q; |
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nv = g[0]->nv; |
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r = 0; |
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for ( j = 0; j < ng; j++ ) { |
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for ( m = BDY(g[j]), lj = 0; m; m = NEXT(m), lj++ ); |
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mj = (MP *)ALLOCA(lj*sizeof(MP)); |
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for ( m = BDY(g[j]), k = 0; m; m = NEXT(m), k++ ) |
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mj[k] = m; |
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for ( i = 0; i < lj; i++ ) { |
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for ( di = mj[i]->dl, k = i+1; k < lj; k++ ) |
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if ( _dl_redble(di,mj[k]->dl,nv) ) break; |
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if ( k < lj ) mj[i] = 0; |
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} |
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hj = BDY(gh[j])->dl; |
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_NEWDL(dl,nv); d = dl->d; |
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r0 = r; |
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for ( i = 0; i < lj; i++ ) { |
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if ( mj[i] && !dl_equal(nv,di=mj[i]->dl,hj) ) { |
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for ( k = 0, t = 0; k < nv; k++ ) { |
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d[k] = hj->d[k]-di->d[k]; |
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t += d[k]; |
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} |
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dl->td = t; |
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#if 1 |
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for ( rt = r0; rt; rt = NEXT(rt) ) { |
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dlt = (DL)BDY(rt); |
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if ( dlt->td != dl->td ) continue; |
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for ( dt = dlt->d, k = 0; k < nv; k++ ) |
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if ( d[k] != dt[k] ) break; |
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if ( k == nv ) break; |
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} |
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#else |
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rt = 0; |
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#endif |
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if ( !rt ) { |
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MKNODE(r1,dl,r); r = r1; |
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_NEWDL(dl,nv); d = dl->d; |
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} |
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} |
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} |
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} |
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for ( rt = r; rt; rt = NEXT(rt) ) { |
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dl = (DL)BDY(rt); d = dl->d; |
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ri = 0; |
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for ( k = nv-1; k >= 0; k-- ) { |
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STOQ(d[k],q); |
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MKNODE(r1,q,ri); ri = r1; |
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} |
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MKNODE(r1,0,ri); MKLIST(l,r1); |
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BDY(rt) = (pointer)l; |
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} |
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return r; |
} |
} |