cmd/eqn/diacrit.c

	diacrit.c revision 779fc935796a940997d18b31d64a9fec9c6b40f6
/*
 * 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"
#include "e.def"

void
diacrit(int p1, int type)
{
    int c, t;
#ifndef NEQN
    int effps;
#endif  /* NEQN */

    c = oalloc();
    t = oalloc();
#ifdef NEQN
    nrwid(p1, ps, p1);
    printf(".nr 10 %du\n", max(eht[p1]-ebase[p1]-VERT(2), 0));
#else   /* NEQN */
    effps = EFFPS(ps);
    nrwid(p1, effps, p1);

    /* vertical shift if high */
    printf(".nr 10 %du\n", VERT(max(eht[p1]-ebase[p1]-EM(1, ps), 0)));

    printf(".if \\n(ct>1 .nr 10 \\n(10+\\s%d.25m\\s0\n", effps);

    /* horiz shift if high */
    printf(".nr %d \\s%d.1m\\s0\n", t, effps);

    printf(".if \\n(ct>1 .nr %d \\s%d.15m\\s0\n", t, effps);
#endif  /* NEQN */
    switch (type) {
        case VEC:   /* vec */
#ifndef NEQN
            printf(".ds %d \\v'-.4m'\\s%d\\(->\\s0\\v'.4m'\n",
                c, max(effps-3, 6));
            break;
#endif  /* NEQN */
        case DYAD:  /* dyad */
#ifdef NEQN
            printf(".ds %d \\v'-12p'_\\v'12p'\n", c);
#else   /* NEQN */
            printf(
                ".ds %d \\v'-.4m'\\s%d\\z\\(<-\\(->\\s0\\v'.4m'\n",
                c, max(effps-3, 6));
#endif  /* NEQN */
            break;
        case HAT:
            printf(".ds %d ^\n", c);
            break;
        case TILDE:
            printf(".ds %d ~\n", c);
            break;
        case DOT:
#ifndef NEQN
            printf(
                ".ds %d \\s%d\\v'-.67m'.\\v'.67m'\\s0\n", c, effps);
#else   /* NEQN */
            printf(".ds %d \\v'-12p'.\\v'12p'\n", c);
#endif  /* NEQN */
            break;
        case DOTDOT:
#ifndef NEQN
            printf(
                ".ds %d \\s%d\\v'-.67m'..\\v'.67m\\s0'\n",
                c, effps);
#else   /* NEQN */
            printf(".ds %d \\v'-12p'..\\v'12p'\n", c);
#endif  /* NEQN */
            break;
        case BAR:
#ifndef NEQN
            printf(".ds %d \\s%d\\v'.28m'\\h'.05m'\\l'\\n"
                "(%du-.1m\\(rn'\\h'.05m'\\v'-.28m'\\s0\n",
                c, effps, p1);
#else   /* NEQN */
            printf(".ds %d \\v'-12p'\\l'\\n(%du'\\v'12p'\n",
                c, p1);
#endif  /* NEQN */
            break;
        case UNDER:
#ifndef NEQN
            printf(".ds %d \\l'\\n(%du\\(ul'\n", c, p1);
            printf(".nr %d 0\n", t);
            printf(".nr 10 0-%d\n", ebase[p1]);
#else   /* NEQN */
            printf(".ds %d \\l'\\n(%du'\n", c, p1);
#endif  /* NEQN */
            break;
    }
    nrwid(c, ps, c);
#ifndef NEQN
    if (lfont[p1] != ITAL)
        printf(".nr %d 0\n", t);
    printf(".as %d \\h'-\\n(%du-\\n(%du/2u+\\n(%du'\\v'0-\\n(10u'\\*(%d",
        p1, p1, c, t, c);
    printf("\\v'\\n(10u'\\h'-\\n(%du+\\n(%du/2u-\\n(%du'\n", c, p1, t);
    /* BUG - should go to right end of widest */
#else   /* NEQN */
    printf(".as %d \\h'-\\n(%du-\\n(%du/2u'\\v'0-\\n(10u'\\*(%d",
        p1, p1, c, c);
    printf("\\v'\\n(10u'\\h'-\\n(%du+\\n(%du/2u'\n", c, p1);
#endif  /* NEQN */
#ifndef NEQN
    if (type != UNDER)
        eht[p1] += VERT(EM(0.15, ps));  /* 0.15m */
    if (dbg)
        printf(".\tdiacrit: %c over S%d, lf=%c, rf=%c, h=%d,b=%d\n",
            type, p1, lfont[p1], rfont[p1], eht[p1], ebase[p1]);
#else   /* NEQN */
    if (type != UNDER)
        eht[p1] += VERT(1);
    if (dbg)
        printf(".\tdiacrit: %c over S%d, h=%d, b=%d\n",
            type, p1, eht[p1], ebase[p1]);
#endif  /* NEQN */
    ofree(c); ofree(t);
}