1 /*
2 * The authors of this software are Rob Pike and Ken Thompson.
3 * Copyright (c) 2002 by Lucent Technologies.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose without fee is hereby granted, provided that this entire notice
6 * is included in all copies of any software which is or includes a copy
7 * or modification of this software and in all copies of the supporting
8 * documentation for such software.
9 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
10 * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
11 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
12 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
13 */
14 #include "utf.h"
15 #include "utfdef.h"
16
17 static
18 Rune*
rbsearch(Rune c,Rune * t,int n,int ne)19 rbsearch(Rune c, Rune *t, int n, int ne)
20 {
21 Rune *p;
22 int m;
23
24 while(n > 1) {
25 m = n >> 1;
26 p = t + m*ne;
27 if(c >= p[0]) {
28 t = p;
29 n = n-m;
30 } else
31 n = m;
32 }
33 if(n && c >= t[0])
34 return t;
35 return 0;
36 }
37
38 /*
39 * The "ideographic" property is hard to extract from UnicodeData.txt,
40 * so it is hard coded here.
41 *
42 * It is defined in the Unicode PropList.txt file, for example
43 * PropList-3.0.0.txt. Unlike the UnicodeData.txt file, the format of
44 * PropList changes between versions. This property appears relatively static;
45 * it is the same in version 4.0.1, except that version defines some >16 bit
46 * chars as ideographic as well: 20000..2a6d6, and 2f800..2Fa1d.
47 */
48 static Rune __isideographicr[] = {
49 0x3006, 0x3007, /* 3006 not in Unicode 2, in 2.1 */
50 0x3021, 0x3029,
51 0x3038, 0x303a, /* not in Unicode 2 or 2.1 */
52 0x3400, 0x4db5, /* not in Unicode 2 or 2.1 */
53 0x4e00, 0x9fbb, /* 0x9FA6..0x9FBB added for 4.1.0? */
54 0xf900, 0xfa2d,
55 0x20000, 0x2A6D6,
56 0x2F800, 0x2FA1D,
57 };
58
59 int
isideographicrune(Rune c)60 isideographicrune(Rune c)
61 {
62 Rune *p;
63
64 p = rbsearch(c, __isideographicr, nelem(__isideographicr)/2, 2);
65 if(p && c >= p[0] && c <= p[1])
66 return 1;
67 return 0;
68 }
69
70 #include "runetypebody.h"
71