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* 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 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
