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1.1 root 1: #include "e.h"
2: #include "y.tab.h"
3:
4: subsup(p1, p2, p3)
5: int p1, p2, p3;
6: {
7: if (p2 != 0 && p3 != 0)
8: shift2(p1, p2, p3);
9: else if (p2 != 0)
10: bshiftb(p1, SUB, p2);
11: else if (p3 != 0)
12: bshiftb(p1, SUP, p3);
13: }
14:
15: extern float Subbase, Supshift;
16: extern char *Sub1space, *Sup1space, *Sub2space;
17: extern char *SS1space, *SS2space;
18:
19: bshiftb(p1, dir, p2)
20: int p1, dir, p2;
21: {
22: int subps;
23: float shval, d1, h1, b1, h2, b2;
24: char *sh1, *sh2;
25:
26: yyval = p1;
27: h1 = eht[p1];
28: b1 = ebase[p1];
29: h2 = eht[p2];
30: b2 = ebase[p2];
31: subps = ps;
32: ps += deltaps;
33: sh1 = sh2 = "";
34: if (dir == SUB) {
35: /* base .2m below bottom of main box */
36: shval = b1 + EM(Subbase, ps);
37: ebase[yyval] = shval + b2;
38: eht[yyval] = max(h1-b1+shval+b2, h2);
39: if (rfont[p1] == ITAL && lfont[p2] == ROM)
40: sh1 = Sub1space;
41: } else { /* superscript */
42: /* 4/10 up main box */
43: d1 = EM(Subbase, subps);
44: ebase[yyval] = b1;
45: shval = -(Supshift * (h1-b1)) - b2;
46: if (Supshift*(h1-b1) + h2 < h1-b1) /* raise little super */
47: shval = -(h1-b1) + h2-b2 - d1;
48: eht[yyval] = h1 + max(0, h2 - (1-Supshift)*(h1-b1));
49: if (rfont[p1] == ITAL)
50: sh1 = Sup1space;
51: }
52: dprintf(".\tS%d <- %d shift %g %d; b=%g, h=%g, ps=%d, subps=%d\n",
53: yyval, p1, shval, p2, ebase[yyval], eht[yyval], ps, subps);
54: sh2 = Sub2space;
55: printf(".as %d \\v'%gm'%s%s\\*(%d%s%s\\v'%gm'\n",
56: yyval, REL(shval,ps), DPS(ps,subps), sh1, p2,
57: DPS(subps,ps), sh2, REL(-shval,ps));
58: rfont[p1] = 0;
59: sfree(p2);
60: }
61:
62: shift2(p1, p2, p3)
63: int p1, p2, p3;
64: {
65: int subps;
66: float h1, h2, h3, b1, b2, b3, subsh, d1, d2, supsh;
67: int treg;
68:
69: treg = salloc();
70: yyval = p1;
71: subps = ps; /* sub and sup at this size */
72: ps += deltaps; /* outer size */
73: h1 = eht[p1]; b1 = ebase[p1];
74: h2 = eht[p2]; b2 = ebase[p2];
75: h3 = eht[p3]; b3 = ebase[p3];
76: subsh = EM(Subbase, ps);
77: if (b1 > b2 + subsh) /* move little sub down */
78: subsh += b1;
79: eht[yyval] = max(subsh+b2-b1+h1, h2);
80: supsh = -Supshift*(h1-b1) - b3;
81: d2 = EM(Subbase, subps);
82: if (h3 < (1-Supshift)*(h1-b1))
83: supsh = -(h1-b1) + (h3-b3) - d2;
84: ebase[yyval] = subsh + b2 - b1;
85: eht[yyval] = h1 + subsh+b2-b1 + max(0, h3-(1-Supshift)*(h1-b1));
86: dprintf(".\tS%d <- %d sub %d sup %d, ps=%d, subps=%d, h=%g, b=%g\n",
87: yyval, p1, p2, p3, ps, subps, eht[yyval], ebase[yyval]);
88: printf(".ds %d %s\\*(%d\n", p2, SS1space, p2);
89: nrwid(p2, subps, p2);
90: printf(".ds %d %s\\*(%d\n", p3, SS2space, p3);
91: nrwid(p3, subps, p3);
92: printf(".nr %d \\n(%d\n", treg, p3);
93: printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, treg, treg, p2);
94: printf(".as %d %s\\v'%gm'\\*(%d\\v'%gm'\\h'-\\n(%du'\\\n",
95: p1, DPS(ps,subps), REL(subsh,subps), p2, REL(-subsh,subps), p2);
96: printf("\\v'%gm'\\*(%d\\v'%gm'\\h'-\\n(%du+\\n(%du'%s%s\n",
97: REL(supsh,subps), p3, REL(-supsh,subps), p3, treg, DPS(subps,ps), Sub2space);
98: if (rfont[p2] == ITAL)
99: rfont[yyval] = 0; /* lie */
100: sfree(p2); sfree(p3); sfree(treg);
101: }
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