paren.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"
paren(leftc, p1, rightc) int p1, leftc, rightc; {
int n, m, h1, j, b1, v;
h1 = eht[p1]; b1 = ebase[p1];
yyval = p1;
#ifndef NEQN
lfont[yyval] = rfont[yyval] = 0;
n = (h1 + EM(1.0, EFFPS(ps)) - 1) / EM(1.0, EFFPS(ps));
#else NEQN
n = max(b1+VERT(1), h1-b1-VERT(1)) / VERT(1);
#endif NEQN
if( n<2 ) n = 1;
m = n-2;
if (leftc=='{' || rightc == '}') {
n = n%2 ? n : ++n;
if( n<3 ) n=3;
m = n-3;
}
#ifndef NEQN
eht[yyval] = VERT(EM(n, ps));
ebase[yyval] = b1 + (eht[yyval]-h1)/2;
v = b1 - h1/2 + VERT(EM(0.4, ps));
#else NEQN
eht[yyval] = VERT(2 * n);
ebase[yyval] = (n)/2 * VERT(2);
if (n%2 == 0)
ebase[yyval] -= VERT(1);
v = b1 - h1/2 + VERT(1);
#endif NEQN
printf(".ds %d \\|\\v'%du'", yyval, v);
switch( leftc ) {
case 'n': /* nothing */
case '\0':
break;
case 'f': /* floor */
if (n <= 1)
printf("\\(lf");
else
brack(m, "\\(bv", "\\(bv", "\\(lf");
break;
case 'c': /* ceiling */
if (n <= 1)
printf("\\(lc");
else
brack(m, "\\(lc", "\\(bv", "\\(bv");
break;
case '{':
printf("\\b'\\(lt");
for(j = 0; j < m; j += 2) printf("\\(bv");
printf("\\(lk");
for(j = 0; j < m; j += 2) printf("\\(bv");
printf("\\(lb'");
break;
case '(':
brack(m, "\\(lt", "\\(bv", "\\(lb");
break;
case '[':
brack(m, "\\(lc", "\\(bv", "\\(lf");
break;
case '|':
brack(m, "\\(bv", "\\(bv", "\\(bv");
break;
default:
brack(m, (char *) &leftc, (char *) &leftc, (char *) &leftc);
break;
}
printf("\\v'%du'\\*(%d", -v, p1);
if( rightc ) {
printf("\\|\\v'%du'", v);
switch( rightc ) {
case 'f': /* floor */
if (n <= 1)
printf("\\(rf");
else
brack(m, "\\(bv", "\\(bv", "\\(rf");
break;
case 'c': /* ceiling */
if (n <= 1)
printf("\\(rc");
else
brack(m, "\\(rc", "\\(bv", "\\(bv");
break;
case '}':
printf("\\b'\\(rt");
for(j = 0; j< m; j += 2)printf("\\(bv");
printf("\\(rk");
for(j = 0; j< m; j += 2) printf("\\(bv");
printf("\\(rb'");
break;
case ']':
brack(m, "\\(rc", "\\(bv", "\\(rf");
break;
case ')':
brack(m, "\\(rt", "\\(bv", "\\(rb");
break;
case '|':
brack(m, "\\(bv", "\\(bv", "\\(bv");
break;
default:
brack(m, (char *) &rightc, (char *) &rightc, (char *) &rightc);
break;
}
printf("\\v'%du'", -v);
}
printf("\n");
if(dbg)printf(".\tcurly: h=%d b=%d n=%d v=%d l=%c, r=%c\n",
eht[yyval], ebase[yyval], n, v, leftc, rightc);
}
brack(m, t, c, b) int m; char *t, *c, *b; {
int j;
printf("\\b'%s", t);
for( j=0; j<m; j++)
printf("%s", c);
printf("%s'", b);
}