usr/src/cmd/eqn/eqnbox.c

# include "e.h"

eqnbox(p1, p2, lu) {
        int b, h;
        char *sh;

        yyval = p1;
        b = max(ebase[p1], ebase[p2]);
        eht[yyval] = h = b + max(eht[p1]-ebase[p1],
                eht[p2]-ebase[p2]);
        ebase[yyval] = b;
        if(dbg)printf(".\te:eb: S%d <- S%d S%d; b=%d, h=%d\n",
                yyval, p1, p2, b, h);
        if (rfont[p1] == ITAL && lfont[p2] == ROM)
                sh = "\\|";
        else
                sh = "";
        if (lu) {
                printf(".nr %d \\w'\\s%d\\*(%d%s'\n", p1, ps, p1, sh);
                printf(".ds %d \\h'|\\n(97u-\\n(%du'\\*(%d\n", p1, p1, p1);
        }
        printf(".as %d \"%s\\*(%d\n", yyval, sh, p2);
        rfont[p1] = rfont[p2];
        ofree(p2);
}