merge eqn and neqn

[unix-history] / usr / src / old / eqn / common_source / over.c

/*      over.c  4.2     83/02/12        */

# include "e.h"

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

       treg = oalloc();
       yyval = p1;
#ifndef NEQN
       d = VERT((ps*6*3) / 10);        /* 0.3m */
       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);
}