# include "e.h"#include "e.def"bshiftb(p1, dir, p2) int p1, dir, p2; {	int shval, diffps, effps, effps2, d1, h1, b1, h2, b2;	char *sh1, *sh2;	yyval = p1;	h1 = eht[p1];	b1 = ebase[p1];	h2 = eht[p2];	b2 = ebase[p2];	effps = EFFPS(ps);	effps2 = EFFPS(ps+deltaps);	diffps = deltaps;	sh1 = sh2 = "";	if( dir == SUB ) {		/* top 1/2m above bottom of main box */		d1 = VERT( (effps2*6)/2 );		shval = - d1 + h2 - b2;		if( d1+b1 > h2 ) /* move little sub down */			shval = b1-b2;		ebase[yyval] = b1 + max(0, h2-b1-d1);		eht[yyval] = h1 + max(0, h2-b1-d1);		if (rfont[p1] == ITAL && lfont[p2] == ROM)			sh1 = "\\|";		if (rfont[p2] == ITAL)			sh2 = "\\|";	} else {	/* superscript */		/* 4/10 up main box */		d1 = VERT( (effps*6*2)/10 );		ebase[yyval] = b1;		shval = -VERT( (4 * (h1-b1)) / 10 ) - b2;		if( VERT(4*(h1-b1)/10) + h2 < h1-b1 )	/* raise little super */			shval = -(h1-b1) + h2-b2 - d1;		eht[yyval] = h1 + max(0, h2-VERT((6*(h1-b1))/10));		if (rfont[p1] == ITAL)			sh1 = "\\|";		if (rfont[p2] == ITAL)			sh2 = "\\|";	}	if(dbg)printf(".\tb:b shift b: S%d <- S%d vert %d S%d vert %d; b=%d, h=%d\n", 		yyval, p1, shval, p2, -shval, ebase[yyval], eht[yyval]);	printf(".as %d \\v'%du'\\s-%d%s\\*(%d\\s+%d%s\\v'%du'\n", 		yyval, shval, diffps, sh1, p2, diffps, sh2, -shval);	ps += deltaps;	if (rfont[p2] == ITAL)		rfont[p1] = 0;	else		rfont[p1] = rfont[p2];	ofree(p2);}shift(p1) int p1; {	ps -= deltaps;	yyval = p1;	if(dbg)printf(".\tshift: %d;ps=%d\n", yyval, ps);}shift2(p1, p2, p3) int p1, p2, p3; {	int effps, effps2, h1, h2, h3, b1, b2, b3, subsh, d1, d2, supsh;	int treg;	treg = oalloc();	yyval = p1;	if(dbg)printf(".\tshift2 s%d <- %d %d %d\n", yyval, p1, p2, p3);	effps = EFFPS(ps+deltaps);	eht[p3] = h3 = VERT( (eht[p3] * effps) / EFFPS(ps) );	ps += deltaps;	effps2 = EFFPS(ps+deltaps);	h1 = eht[p1]; b1 = ebase[p1];	h2 = eht[p2]; b2 = ebase[p2];	b3 = ebase[p3];	d1 = VERT( (effps2*6)/2 );	subsh = -d1+h2-b2;	if( d1+b1 > h2 ) /* move little sub down */		subsh = b1-b2;	supsh = -VERT( (4*(h1-b1))/10 ) - b3;	d2 = VERT( (effps*6*2)/10 );	if( VERT(4*(h1-b1)/10)+h3 < h1-b1 )		supsh = -(h1-b1) + (h3-b3) - d2;	eht[yyval] = h1 + max(0, h3-VERT( (6*(h1-b1))/10 )) + max(0, h2-b1-d1);	ebase[yyval] = b1+max(0, h2-b1-d1);	if (rfont[p1] == ITAL && lfont[p2] == ROM)		printf(".ds %d \\|\\*(%d\n", p2, p2);	if (rfont[p2] == ITAL)		printf(".as %d \\|\n", p2);	nrwid(p2, effps, p2);	if (rfont[p1] == ITAL && lfont[p3] == ROM)		printf(".ds %d \\|\\|\\*(%d\n", p3, p3);	else		printf(".ds %d \\|\\*(%d\n", p3, p3);	nrwid(p3, effps, p3);	printf(".nr %d \\n(%d\n", treg, p3);	printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, treg, treg, p2);	printf(".as %d \\v'%du'\\s%d\\*(%d\\h'-\\n(%du'\\v'%du'\\\n", 		p1, subsh, effps, p2, p2, -subsh+supsh);	printf("\\s%d\\*(%d\\h'-\\n(%du+\\n(%du'\\s%d\\v'%du'\n", 		effps, p3, p3, treg, effps2, -supsh);	ps += deltaps;	if (rfont[p2] == ITAL)		rfont[yyval] = 0;	/* lie */	ofree(p2); ofree(p3); ofree(treg);}