1 /* Conversion UTF-8 to UCS-4.
2 Copyright (C) 2001-2002, 2006-2007, 2009-2017 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2001.
5 This program is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Lesser General Public License as published
7 by the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #if defined IN_LIBUNISTRING || HAVE_INLINE
26 u8_mbtouc_aux (ucs4_t
*puc
, const uint8_t *s
, size_t n
)
36 if ((s
[1] ^ 0x80) < 0x40)
38 *puc
= ((unsigned int) (c
& 0x1f) << 6)
39 | (unsigned int) (s
[1] ^ 0x80);
42 /* invalid multibyte character */
46 /* incomplete multibyte character */
55 if ((s
[1] ^ 0x80) < 0x40)
57 if ((s
[2] ^ 0x80) < 0x40)
59 if ((c
>= 0xe1 || s
[1] >= 0xa0)
60 && (c
!= 0xed || s
[1] < 0xa0))
62 *puc
= ((unsigned int) (c
& 0x0f) << 12)
63 | ((unsigned int) (s
[1] ^ 0x80) << 6)
64 | (unsigned int) (s
[2] ^ 0x80);
67 /* invalid multibyte character */
71 /* invalid multibyte character */
75 /* invalid multibyte character */
79 /* incomplete multibyte character */
81 if (n
== 1 || (s
[1] ^ 0x80) >= 0x40)
91 if ((s
[1] ^ 0x80) < 0x40)
93 if ((s
[2] ^ 0x80) < 0x40)
95 if ((s
[3] ^ 0x80) < 0x40)
97 if ((c
>= 0xf1 || s
[1] >= 0x90)
98 && (c
< 0xf4 || (c
== 0xf4 && s
[1] < 0x90)))
100 *puc
= ((unsigned int) (c
& 0x07) << 18)
101 | ((unsigned int) (s
[1] ^ 0x80) << 12)
102 | ((unsigned int) (s
[2] ^ 0x80) << 6)
103 | (unsigned int) (s
[3] ^ 0x80);
106 /* invalid multibyte character */
110 /* invalid multibyte character */
114 /* invalid multibyte character */
118 /* invalid multibyte character */
122 /* incomplete multibyte character */
124 if (n
== 1 || (s
[1] ^ 0x80) >= 0x40)
126 else if (n
== 2 || (s
[2] ^ 0x80) >= 0x40)
133 /* invalid multibyte character */