cmd/eqn/over.c

	over.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved. The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

/*
 * Copyright (c) 1983, 1984 1985, 1986, 1987, 1988, Sun Microsystems, Inc.
 * All Rights Reserved.
 */

#ident  "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.1   */

# include "e.h"

boverb(p1, p2) int p1, p2; {
    int h, b, treg, d;

    treg = oalloc();
    yyval = p1;
#ifndef NEQN
    d = VERT(EM(0.3, ps));
    h = eht[p1] + eht[p2] + d;
#else NEQN
    d = VERT(1);
    h = eht[p1] + eht[p2];
#endif NEQN
    b = eht[p2] - d;
    if(dbg)printf(".\tb:bob: S%d <- S%d over S%d; b=%d, h=%d\n",
        yyval, p1, p2, b, h);
    nrwid(p1, ps, p1);
    nrwid(p2, ps, p2);
    printf(".nr %d \\n(%d\n", treg, p1);
    printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, treg, treg, p2);
#ifndef NEQN
    printf(".nr %d \\n(%d+\\s%d.5m\\s0\n", treg, treg, EFFPS(ps));
#endif NEQN
    printf(".ds %d \\v'%du'\\h'\\n(%du-\\n(%du/2u'\\*(%d\\\n",
        yyval, eht[p2]-ebase[p2]-d, treg, p2, p2);
    printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%du'\\*(%d\\\n",
#ifndef NEQN
        p2, p1, -(eht[p2]-ebase[p2]+d+ebase[p1]), p1);
    printf("\\h'-\\n(%du-\\n(%du/2u+.1m'\\v'%du'\\l'\\n(%du-.2m'\\h'.1m'\\v'%du'\n",
         treg, p1, ebase[p1]+d, treg, d);
#else NEQN
        p2, p1, -eht[p2]+ebase[p2]-ebase[p1], p1);
    printf("\\h'-\\n(%du-\\n(%du-2u/2u'\\v'%du'\\l'\\n(%du'\\v'%du'\n",
         treg, p1, ebase[p1], treg, d);
#endif NEQN
    ebase[yyval] = b;
    eht[yyval] = h;
    lfont[yyval] = rfont[yyval] = 0;
    ofree(p2);
    ofree(treg);
}