71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/*
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* The authors of this software are Rob Pike and Ken Thompson.
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* Copyright (c) 2002 by Lucent Technologies.
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* Permission to use, copy, modify, and distribute this software for any
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* purpose without fee is hereby granted, provided that this entire notice
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* is included in all copies of any software which is or includes a copy
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* or modification of this software and in all copies of the supporting
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* documentation for such software.
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
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* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
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* OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
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*/
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#include "utf.h"
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#include "utfdef.h"
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static
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Rune*
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rbsearch(Rune c, Rune *t, int n, int ne)
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{
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Rune *p;
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int m;
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while(n > 1) {
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m = n >> 1;
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p = t + m*ne;
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if(c >= p[0]) {
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t = p;
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n = n-m;
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} else
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n = m;
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}
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if(n && c >= t[0])
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return t;
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return 0;
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}
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/*
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* The "ideographic" property is hard to extract from UnicodeData.txt,
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* so it is hard coded here.
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*
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* It is defined in the Unicode PropList.txt file, for example
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* PropList-3.0.0.txt. Unlike the UnicodeData.txt file, the format of
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* PropList changes between versions. This property appears relatively static;
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* it is the same in version 4.0.1, except that version defines some >16 bit
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* chars as ideographic as well: 20000..2a6d6, and 2f800..2Fa1d.
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*/
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static Rune __isideographicr[] = {
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0x3006, 0x3007, /* 3006 not in Unicode 2, in 2.1 */
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0x3021, 0x3029,
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0x3038, 0x303a, /* not in Unicode 2 or 2.1 */
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0x3400, 0x4db5, /* not in Unicode 2 or 2.1 */
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0x4e00, 0x9fbb, /* 0x9FA6..0x9FBB added for 4.1.0? */
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0xf900, 0xfa2d,
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0x20000, 0x2A6D6,
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0x2F800, 0x2FA1D,
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};
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int
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isideographicrune(Rune c)
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{
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Rune *p;
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p = rbsearch(c, __isideographicr, nelem(__isideographicr)/2, 2);
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if(p && c >= p[0] && c <= p[1])
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return 1;
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return 0;
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}
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#include "runetypebody.h"
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