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Annotation of 43BSD/usr.bin/eqn/fromto.c, revision 1.1.1.1

1.1       root        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: }

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