4.3BSD - /usr/src/usr.bin/eqn/fromto.c

   1: #ifndef lint
   2: static char sccsid[] = "@(#)fromto.c	4.3 8/11/83";
   3: #endif
   4: 
   5: # include "e.h"
   6: 
   7: fromto(p1, p2, p3) int p1, p2, p3; {
   8:     int b, h1, b1, pss;
   9:     yyval = oalloc();
  10:     lfont[yyval] = rfont[yyval] = 0;
  11:     h1 = eht[yyval] = eht[p1];
  12:     b1 = ebase[p1];
  13:     b = 0;
  14:     pss = EFFPS(ps);
  15:     ps += 3;
  16:     nrwid(p1, ps, p1);
  17:     printf(".nr %d \\n(%d\n", yyval, p1);
  18:     if( p2>0 ) {
  19:         nrwid(p2, pss, p2);
  20:         printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, yyval, yyval, p2);
  21:         eht[yyval] += eht[p2];
  22:         b = eht[p2];
  23:     }
  24:     if( p3>0 ) {
  25:         nrwid(p3, pss, p3);
  26:         printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p3, yyval, yyval, p3);
  27:         eht[yyval] += eht[p3];
  28:     }
  29:     printf(".ds %d ", yyval);   /* bottom of middle box */
  30:     if( p2>0 ) {
  31:         printf("\\v'%du'\\h'\\n(%du-\\n(%du/2u'\\s%d\\*(%d\\s%d",
  32:             eht[p2]-ebase[p2]+b1, yyval, p2, pss, p2, EFFPS(ps));
  33:         printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%du'\\\n",
  34:             yyval, p2, -(eht[p2]-ebase[p2]+b1));
  35:     }
  36: #ifndef NEQN
  37:     printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du/2u'\\\n",
  38: #else NEQN
  39:     printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du+2u/2u'\\\n",
  40: #endif NEQN
  41:         yyval, p1, p1, yyval, p1);
  42:     if( p3>0 ) {
  43:         printf("\\v'%du'\\h'-\\n(%du-\\n(%du/2u'\\s%d\\*(%d\\s%d\\h'\\n(%du-\\n(%du/2u'\\v'%du'\\\n",
  44:             -(h1-b1+ebase[p3]), yyval, p3, pss, p3, EFFPS(ps), yyval, p3, (h1-b1+ebase[p3]));
  45:     }
  46:     printf("\n");
  47:     ebase[yyval] = b + b1;
  48:     if(dbg)printf(".\tfrom to: S%d <- %d f %d t %d; h=%d b=%d\n",
  49:         yyval, p1, p2, p3, eht[yyval], ebase[yyval]);
  50:     ofree(p1);
  51:     if( p2>0 ) ofree(p2);
  52:     if( p3>0 ) ofree(p3);
  53: }

Defined functions

Defined variables