3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Paul Borman at Krystal Technologies.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * $FreeBSD: src/lib/libc/locale/utf2.c,v 1.3.2.2 2001/03/05 10:27:18 obrien Exp $
37 * $DragonFly: src/lib/libcr/locale/Attic/utf2.c,v 1.3 2003/11/12 20:21:27 eirikn Exp $
39 * @(#)utf2.c 8.1 (Berkeley) 6/4/93
47 rune_t _UTF2_sgetrune (const char *, size_t, char const **);
48 int _UTF2_sputrune (rune_t, char *, size_t, char **);
50 static int _utf_count[16] = {
51 1, 1, 1, 1, 1, 1, 1, 1,
52 0, 0, 0, 0, 2, 2, 3, 0,
59 rl->sgetrune = _UTF2_sgetrune;
60 rl->sputrune = _UTF2_sputrune;
61 _CurrentRuneLocale = rl;
67 _UTF2_sgetrune(string, n, result)
74 if (n < 1 || (c = _utf_count[(*string >> 4) & 0xf]) > n) {
77 return (_INVALID_RUNE);
83 return (*string & 0xff);
85 if ((string[1] & 0xC0) != 0x80)
89 return (((string[0] & 0x1F) << 6) | (string[1] & 0x3F));
91 if ((string[1] & 0xC0) != 0x80 || (string[2] & 0xC0) != 0x80)
95 return (((string[0] & 0x1F) << 12) | ((string[1] & 0x3F) << 6)
96 | (string[2] & 0x3F));
98 encoding_error: if (result)
100 return (_INVALID_RUNE);
105 _UTF2_sputrune(c, string, n, result)
107 char *string, **result;
113 string[0] = 0xE0 | ((c >> 12) & 0x0F);
114 string[1] = 0x80 | ((c >> 6) & 0x3F);
115 string[2] = 0x80 | ((c) & 0x3F);
118 *result = string + 3;
128 string[0] = 0xC0 | ((c >> 6) & 0x1F);
129 string[1] = 0x80 | ((c) & 0x3F);
132 *result = string + 2;
142 *result = string + 1;