/****************************************************************
Copyright (C) 1997 Lucent Technologies
All Rights Reserved

Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of Lucent or any of its entities
not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.

LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
THIS SOFTWARE.
****************************************************************/

#include "jac2dim.h"

 void
#ifdef KR_headers
com2eval_ASL(asl, i, ie) ASL_fgh *asl; int i; int ie;
#else
com2eval_ASL(ASL_fgh *asl, int i, int ie)
#endif
{
	register cexp *c, *ce;
	register expr *e;
	register expr_v *V = var_ex + i;
	register linpart *L, *Le;
	real t;
	c = cexps + i;
	ce = cexps + ie;
	do {
		e = c->e;
		t = (*e->op)(e C_ASL);
		if (L = c->L)
			for(Le = L + c->nlin; L < Le; L++)
				t += L->fac * ((expr_v*)L->v.vp)->v;
		(*V++).v = t;
		}
		while(++c < ce);
	}

 void
#ifdef KR_headers
com1eval(asl, i, n) ASL_fgh *asl; int i; int n;
#else
com1eval(ASL_fgh *asl, int i, int n)
#endif
{
	register cexp1 *c, *ce;
	register expr *e;
	register expr_v *V;
	register linpart *L, *Le;
	real t;

	V = var_ex1 + i;
	c = cexps1 + i;
	ce = c + n;
	do {
		e = c->e;
		t = (*e->op)(e C_ASL);
		if (L = c->L)
			for(Le = L + c->nlin; L < Le; L++)
				t += L->fac * ((expr_v*)L->v.vp)->v;
		(*V++).v = t;
		}
		while(++c < ce);
	}

 void
#ifdef KR_headers
funnelset(asl, f) ASL_fgh *asl; register funnel *f;
#else
funnelset(ASL_fgh *asl, register funnel *f)
#endif
{
	register derp	*d;
	register cplist	*cl;

	for(; f; f = f->next) {
		memset(adjoints_nv1, 0, f->fcde.zaplen);
		cl = f->cl;
		do *cl->ca.rp = 0;
			while(cl = cl->next);
		d = f->fcde.d;
		*d->b.rp = 1.;
		do *d->a.rp += *d->b.rp * *d->c.rp;
			while(d = d->next);
		cl = f->cl;
		do *cl->cfa = *cl->ca.rp;
			while(cl = cl->next);
		}
	}

 static void
#ifdef KR_headers
hv_fwd(e) register expr *e;
#else
hv_fwd(register expr *e)
#endif
{
	register expr *e1, **ep;
	argpair *da, *dae;
	real dO;

	for(; e; e = e->fwd) {
	    e->aO = e->adO = 0;
	    switch(e->a) {

		case Hv_timesR:
		case Hv_binaryR:
			e->dO.r = e->R.e->dO.r * e->dR;
			break;

		case Hv_timesLR:
		case Hv_binaryLR:
			e->dO.r = e->L.e->dO.r*e->dL + e->R.e->dO.r*e->dR;
			break;

		case Hv_timesL:
		case Hv_unary:
			e->dO.r = e->L.e->dO.r * e->dL;
			break;

		case Hv_vararg:
		case Hv_if:
			if (e1 = ((expr_va *)e)->valf) {
				hv_fwd(e1);
				e->dO.r = ((expr_va *)e)->vale->dO.r;
				}
			else if (e1 = ((expr_va *)e)->val)
				e->dO.r = e1->dO.r;
			else
				e->dO.r = 0;
			break;

		case Hv_plterm:
			e->dO.r = e->dL * e->R.e->dO.r;
			break;

		case Hv_sumlist:
			ep = e->R.ep;
			for(dO = 0; e1 = *ep; ep++)
				dO += e1->dO.r;
			e->dO.r = dO;
			break;

		case Hv_func:
			da = ((expr_f *)e)->da;
			dae = ((expr_f *)e)->dae;
			for(dO = 0; da < dae; da++)
				dO += da->e->dO.r * *da->u.v;
			e->dO.r = dO;
			break;

		case Hv_negate:
			e->dO.r = -e->L.e->dO.r;
			break;

		case Hv_plusR:
			e->dO.r = e->R.e->dO.r;
			break;

		case Hv_plusL:
			e->dO.r = e->L.e->dO.r;
			break;

		case Hv_plusLR:
			e->dO.r = e->L.e->dO.r + e->R.e->dO.r;
			break;

		case Hv_minusR:
			e->dO.r = -e->R.e->dO.r;
			break;

		case Hv_minusLR:
			e->dO.r = e->L.e->dO.r - e->R.e->dO.r;
			break;

		default:/*DEBUG*/
			fprintf(Stderr, "bad e->a = %d in hv_fwd\n", e->a);
			exit(1);
		}
	    }
	}

 static void
#ifdef KR_headers
func_back(f) expr_f *f;
#else
func_back(expr_f *f)
#endif
{
	argpair *da, *da1, *dae;
	expr *e;
	real **fh;
	real aO, adO, t;

	fh = f->fh;
	aO = f->aO;
	adO = f->adO;
	da = f->da;
	for(dae = f->dae; da < dae; da++) {
		e = da->e;
		t = *da->u.v;
		e->aO += t*aO;
		e->adO += t*adO;
		for(da1 = f->da; da1 < dae; da1++) {
			e = da1->e;
			e->aO += adO*e->dO.r * **fh++;
			}
		}
	}

 static void
#ifdef KR_headers
hv_back(e) register expr *e;
#else
hv_back(register expr *e)
#endif
{
	register expr *e1, **ep, *e2;
	real adO, t1, t2;

	if (!e || !e->aO && !e->adO)
		return;
	for(; e; e = e->bak)
	    switch(e->a) {
		case Hv_binaryR:
			e1 = e->R.e;
			e1->adO += e->adO * e->dR;
			e1->aO += e->aO * e->dR  +  e->adO * e1->dO.r * e->dR2;
			break;

		case Hv_binaryLR:
			e1 = e->L.e;
			e2 = e->R.e;
			adO = e->adO;
			t1 = adO * e1->dO.r;
			t2 = adO * e2->dO.r;
			e1->aO  += e->aO*e->dL + t1*e->dL2 + t2*e->dLR;
			e2->aO  += e->aO*e->dR + t1*e->dLR + t2*e->dR2;
			e1->adO += adO * e->dL;
			e2->adO += adO * e->dR;
			break;

		case Hv_unary:
			e1 = e->L.e;
			e1->adO += e->adO * e->dL;
			e1->aO  += e->aO * e->dL  +  e->adO * e1->dO.r * e->dL2;
			break;

		case Hv_vararg:
		case Hv_if:
			if (e1 = ((expr_va *)e)->vale) {
				e1->aO = e->aO;
				e1->adO = e->adO;
				hv_back(e1);
				}
			else {
				e1 = ((expr_va *)e)->val;
				if (e1->op != f_OPNUM) {
					e1->aO = e->aO;
					e1->adO = e->adO;
					}
				}
			break;

		case Hv_plterm:
			e->R.e->aO += e->dL * e->aO;
			break;

		case Hv_sumlist:
			ep = e->R.ep;
			t1 = e->aO;
			t2 = e->adO;
			while(e1 = *ep++) {
				e1->aO += t1;
				e1->adO += t2;
				}
			break;

		case Hv_func:
			func_back((expr_f *)e);
			break;

		case Hv_negate:
			e1 = e->L.e;
 neg_end:
			e1->aO -= e->aO;
			e1->adO -= e->adO;
			break;

		case Hv_plusR:
			e1 = e->R.e;
			goto plus_end;

		case Hv_plusL:
			e1 = e->L.e;
 plus_end:
			e1->aO += e->aO;
			e1->adO += e->adO;
			break;

		case Hv_plusLR:
			e1 = e->L.e;
			e1->aO += t1 = e->aO;
			e1->adO += t2 = e->adO;
			e1 = e->R.e;
			e1->aO += t1;
			e1->adO += t2;
			break;

		case Hv_minusR:
			e1 = e->R.e;
			goto neg_end;

		case Hv_minusLR:
			e1 = e->L.e;
			e1->aO += t1 = e->aO;
			e1->adO += t2 = e->adO;
			e1 = e->R.e;
			e1->aO -= t1;
			e1->adO -= t2;
			break;

		case Hv_timesR:
			e1 = e->R.e;
			e1->adO += e->adO * (t1 = e->dR);
			e1->aO += e->aO * t1;
			break;

		case Hv_timesL:
			e1 = e->L.e;
			e1->adO += e->adO * (t1 = e->dL);
			e1->aO  += e->aO * t1;
			break;

		case Hv_timesLR:
			e1 = e->L.e;
			e2 = e->R.e;
			adO = e->adO;
			e1->aO  += e->aO*e->dL  +  adO * e2->dO.r;
			e2->aO  += e->aO*e->dR  +  adO * e1->dO.r;
			e1->adO += adO * e->dL;
			e2->adO += adO * e->dR;
			break;

		default:/*DEBUG*/
			fprintf(Stderr, "bad e->a = %d in hv_back\n", e->a);
			exit(1);
		}
	}

 static void
#ifdef KR_headers
hv_fwd0(c, v) register cexp *c; register expr_v *v;
#else
hv_fwd0(register cexp *c, register expr_v *v)
#endif
{
	register linpart *L, *Le;
	real x;

	v->aO = v->adO = 0;
	if (c->ef) {
		hv_fwd(c->ef);
		x = c->ee->dO.r;
		}
	else if (c->e->op != f_OPNUM)
		x = c->e->dO.r;
	else
		x = 0;
	if (L = c->L)
		for(Le = L + c->nlin; L < Le; L++)
			x += L->fac * ((expr_v*)L->v.vp)->dO.r;
	v->dO.r = x;
	}

 static void
#ifdef KR_headers
hv_fwd1(asl, d) ASL_fgh *asl; cde *d;
#else
hv_fwd1(ASL_fgh *asl, cde *d)
#endif
{
	int i;
	cexp1 *c, *ce;
	expr_v *v;

	i = d->com11;
	v = var_ex1 + i;
	c = cexps1 + i;
	ce = c + d->n_com1;
	do hv_fwd0((cexp *)c, v++);
		while(++c < ce);
	}

 static void
#ifdef KR_headers
hv_back0(asl, i, n) ASL_fgh *asl; int i; int n;
#else
hv_back0(ASL_fgh *asl, int i, int n)
#endif
{
	cexp *c, *ce;
	expr *e;
	expr_v *v;
	register linpart *L, *Le;
	real t;

	v = var_ex + (i + n);
	ce = cexps + i;
	c = ce + n;
	do {
		--c;
		--v;
		if ((t = v->aO) && (L = c->L))
			for(Le = L + c->nlin; L < Le; L++)
				((expr_v*)L->v.vp)->aO += t * L->fac;
		if (e = c->ee) {
			e->aO = t;
			e->adO = v->adO;
			hv_back(e);
			}
		else if ((e = c->e)->op != f_OPNUM) {
			e->aO = t;
			e->adO = v->adO;
			}
		}
		while(c != ce);
	}

 static void
#ifdef KR_headers
hv_back1(asl, d) ASL_fgh *asl; cde *d;
#else
hv_back1(ASL_fgh *asl, cde *d)
#endif
{
	int i;
	cexp1 *c, *ce;
	expr *e;
	expr_v *v;
	register linpart *L, *Le;
	real t;

	i = d->com11 + d->n_com1;
	v = var_ex1 + i;
	c = cexps1 + i;
	ce = cexps1 + d->com11;
	do {
		--c;
		--v;
		if ((t = v->aO) && (L = c->L))
			for(Le = L + c->nlin; L < Le; L++)
				((expr_v*)L->v.vp)->aO += t * L->fac;
		if (e = c->ee) {
			e->aO = t;
			e->adO = v->adO;
			hv_back(e);
			}
		else if ((e = c->e)->op != f_OPNUM) {
			e->aO = t;
			e->adO = v->adO;
			}
		}
		while(c != ce);
	}

#undef asl

 void
#ifdef KR_headers
hv2comp_ASL(a, hv, p, nobj, ow, y0)
	ASL *a; real *hv, *p, *ow, *y0; int nobj;
#else
hv2comp_ASL(ASL *a, real *hv, real *p, int nobj, real *ow, real *y0)
#endif
	/* p = direction */
	/* y = Lagrange multipliers */
	/* hv = result */
{
	expr_v *x, *xe;
	expr *e;
	real *cscale, t, *vscale, *y, *ye, yi;
	cde *d, *d0;
	cexp *c, *ce;
	ASL_fgh *asl;
	int n, no, noe;

	ASL_CHECK(a, ASL_read_fgh, "hv2comp");
	asl = (ASL_fgh*)a;

	if (nobj >= 0 && nobj < n_obj) {
		no = nobj;
		noe = no + 1;
		ow = &edag_one_ASL;
		}
	else {
		nobj = -1;
		no = noe = 0;
		if (ow)
			noe = n_obj;
		}

	n = n_var;
	for(x = var_e, xe = x + n; x < xe; x++) {
		x->dO.r = *p++;
		x->aO = x->adO = 0;
		}
	if (vscale = asl->i.vscale)
		for(x = var_e; x < xe; x++)
			x->dO.r *= *vscale++;
	x = var_ex;
	if (comb)
		for(c = cexps, ce = cexpsc; c < ce; c++)
			hv_fwd0(c, x++);
	if (y = y0) {
		ye = y + n_con;
		d = con_de;
		for(y0 = 0; y < ye; y++, d++)
			if ((e = d->ef) && *y) {
				if (!y0) {
					if (comc) {
						c = cexpsc;
						ce = cexpso;
						for(; c < ce; c++)
							hv_fwd0(c, x++);
						}
					y0 = y;
					d0 = d;
					}
				if (d->n_com1)
					hv_fwd1(asl, d);
				hv_fwd(e);
				}
		}
	for(; no < noe; no++)
	    if (t = *ow++) {
		d = obj_de + no;
		if (cexpso < cexpse) {
			x = var_ex + combc;
			c = cexpso;
			ce = cexpse;
			do hv_fwd0(c, x++);
				while(++c < ce);
			}
		if (d->n_com1)
			hv_fwd1(asl, d);
		if (e = d->ef) {
			hv_fwd(e);
			e = d->ee;
			e->aO = 0;
			e->adO = t;
			hv_back(e);
			}
		else if ((e = d->e)->op != f_OPNUM) {
			e->aO = 0;
			e->adO = t;
			}
		if (d->n_com1)
			hv_back1(asl, d);
		if (como)
			hv_back0(asl, combc, como);
		}
	if (y0) {
		if (cscale = a->i.lscale)
			cscale += d0 - con_de;
		do {
			yi = *y0++;
			if (cscale)
				yi *= *cscale++;
			if (!(e = d0->ee)) {
				if ((e = d0->e)->op != f_OPNUM) {
					e->aO = 0;
					e->adO = yi;
					}
				}
			else if (e->adO = yi) {
				e->aO = 0;
				hv_back(e);
				if (d0->n_com1)
					hv_back1(asl, d0);
				}
			d0++;
			}
			while(y0 < ye);
		if (comc)
			hv_back0(asl, comb, comc);
		}
	if (comb)
		hv_back0(asl, 0, comb);
	x = var_e;
	if (vscale)
		for(vscale = asl->i.vscale; x < xe; x++)
			*hv++ = x->aO * *vscale++;
	else
		for(; x < xe; x++)
			*hv++ = x->aO;
	}