cmd/eqn/eqnbox.c

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  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.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include "e.h"

void
eqnbox(int p1, int p2, int 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);
}