52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
# include "e.h"
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void fromto(int p1, int p2, int p3)
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{
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double b, h1, b1, t;
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int subps;
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yyval = salloc();
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lfont[yyval] = rfont[yyval] = 0;
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h1 = eht[yyval] = eht[p1];
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b1 = ebase[p1];
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b = 0;
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subps = ps;
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ps += deltaps;
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nrwid(p1, ps, p1);
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printf(".nr %d \\n(%d\n", yyval, p1);
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if (p2 > 0) {
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nrwid(p2, subps, p2);
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printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, yyval, yyval, p2);
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eht[yyval] += eht[p2];
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b = eht[p2];
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}
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if (p3 > 0) {
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nrwid(p3, subps, p3);
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printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p3, yyval, yyval, p3);
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eht[yyval] += eht[p3];
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}
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printf(".ds %d ", yyval); /* bottom of middle box */
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if (p2 > 0) {
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t = eht[p2]-ebase[p2]+b1;
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printf("\\v'%gm'\\h'\\n(%du-\\n(%du/2u'%s\\*(%d%s",
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REL(t,ps), yyval, p2, DPS(ps,subps), p2, DPS(subps,ps));
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printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
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yyval, p2, REL(-t,ps));
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}
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printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du/2u'\\\n",
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yyval, p1, p1, yyval, p1);
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if (p3 >0) {
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t = h1-b1+ebase[p3];
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printf("\\v'%gm'\\h'-\\n(%du-\\n(%du/2u'%s\\*(%d%s\\h'\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
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REL(-t,ps), yyval, p3, DPS(ps,subps), p3, DPS(subps,ps), yyval, p3, REL(t,ps));
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}
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printf("\n");
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ebase[yyval] = b + b1;
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dprintf(".\tS%d <- %d from %d to %d; h=%g b=%g\n",
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yyval, p1, p2, p3, eht[yyval], ebase[yyval]);
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sfree(p1);
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if (p2 > 0)
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sfree(p2);
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if (p3 > 0)
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sfree(p3);
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}
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