1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)fromto.c 4.4 (Berkeley) 04/17/91"; 10 #endif /* not lint */ 11 12 # include "e.h" 13 14 fromto(p1, p2, p3) int p1, p2, p3; { 15 int b, h1, b1, pss; 16 yyval = oalloc(); 17 lfont[yyval] = rfont[yyval] = 0; 18 h1 = eht[yyval] = eht[p1]; 19 b1 = ebase[p1]; 20 b = 0; 21 pss = EFFPS(ps); 22 ps += 3; 23 nrwid(p1, ps, p1); 24 printf(".nr %d \\n(%d\n", yyval, p1); 25 if( p2>0 ) { 26 nrwid(p2, pss, p2); 27 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, yyval, yyval, p2); 28 eht[yyval] += eht[p2]; 29 b = eht[p2]; 30 } 31 if( p3>0 ) { 32 nrwid(p3, pss, p3); 33 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p3, yyval, yyval, p3); 34 eht[yyval] += eht[p3]; 35 } 36 printf(".ds %d ", yyval); /* bottom of middle box */ 37 if( p2>0 ) { 38 printf("\\v'%du'\\h'\\n(%du-\\n(%du/2u'\\s%d\\*(%d\\s%d", 39 eht[p2]-ebase[p2]+b1, yyval, p2, pss, p2, EFFPS(ps)); 40 printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%du'\\\n", 41 yyval, p2, -(eht[p2]-ebase[p2]+b1)); 42 } 43 #ifndef NEQN 44 printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du/2u'\\\n", 45 #else NEQN 46 printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du+2u/2u'\\\n", 47 #endif NEQN 48 yyval, p1, p1, yyval, p1); 49 if( p3>0 ) { 50 printf("\\v'%du'\\h'-\\n(%du-\\n(%du/2u'\\s%d\\*(%d\\s%d\\h'\\n(%du-\\n(%du/2u'\\v'%du'\\\n", 51 -(h1-b1+ebase[p3]), yyval, p3, pss, p3, EFFPS(ps), yyval, p3, (h1-b1+ebase[p3])); 52 } 53 printf("\n"); 54 ebase[yyval] = b + b1; 55 if(dbg)printf(".\tfrom to: S%d <- %d f %d t %d; h=%d b=%d\n", 56 yyval, p1, p2, p3, eht[yyval], ebase[yyval]); 57 ofree(p1); 58 if( p2>0 ) ofree(p2); 59 if( p3>0 ) ofree(p3); 60 } 61