2 Copyright (C) 2002, 2006 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2002.
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU Library General Public License as published
7 by the Free Software Foundation; either version 2, or (at your option)
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 u8_check (const uint8_t *s, size_t n)
28 const uint8_t *s_end = s + n;
32 /* Keep in sync with utf8-ucs4.h and utf8-ucs4.c. */
45 && (s[1] ^ 0x80) < 0x40)
54 && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
55 && (c >= 0xe1 || s[1] >= 0xa0)
56 && (c != 0xed || s[1] < 0xa0))
65 && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
66 && (s[3] ^ 0x80) < 0x40
67 && (c >= 0xf1 || s[1] >= 0x90)
69 && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90))
81 && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
82 && (s[3] ^ 0x80) < 0x40 && (s[4] ^ 0x80) < 0x40
83 && (c >= 0xf9 || s[1] >= 0x88))
92 && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
93 && (s[3] ^ 0x80) < 0x40 && (s[4] ^ 0x80) < 0x40
94 && (s[5] ^ 0x80) < 0x40
95 && (c >= 0xfd || s[1] >= 0x84))
103 /* invalid or incomplete multibyte character */