chiark / gitweb /
Remove arch tags throughout
[disorder] / lib / utf8.h
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460b9539 1/*
2 * This file is part of DisOrder
3 * Copyright (C) 2004, 2005 Richard Kettlewell
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20#ifndef UTF8_H
21#define UTF8_H
22
23#define PARSE_UTF8(S,C,E) do { \
24 if((unsigned char)*S < 0x80) \
25 C = *S++; \
26 else if((unsigned char)*S <= 0xDF) { \
27 C = (*S++ & 0x1F) << 6; \
28 if((*S & 0xC0) != 0x80) { E; } \
29 C |= (*S++ & 0x3F); \
30 if(C < 0x80) { E; } \
31 } else if((unsigned char)*S <= 0xEF) { \
32 C = (*S++ & 0x0F) << 12; \
33 if((*S & 0xC0) != 0x80) { E; } \
34 C |= (*S++ & 0x3F) << 6; \
35 if((*S & 0xC0) != 0x80) { E; } \
36 C |= (*S++ & 0x3F); \
37 if(C < 0x800 \
38 || (C >= 0xD800 && C <= 0xDFFF)) { \
39 E; \
40 } \
41 } else if((unsigned char)*S <= 0xF7) { \
42 C = (*S++ & 0x07) << 18; \
43 if((*S & 0xC0) != 0x80) { E; } \
44 C |= (*S++ & 0x3F) << 12; \
45 if((*S & 0xC0) != 0x80) { E; } \
46 C |= (*S++ & 0x3F) << 6; \
47 if((*S & 0xC0) != 0x80) { E; } \
48 C |= (*S++ & 0x3F); \
49 if(C < 0x10000 || C > 0x10FFFF) { E; } \
50 } else { \
51 E; \
52 } \
53} while(0)
54
55int validutf8(const char *s);
56/* return nonzero if S is a valid UTF-8 sequence, else false */
57
58#endif /* UTF8_h */
59
60/*
61Local Variables:
62c-basic-offset:2
63comment-column:40
64End:
65*/