1*880d7978SAlexander Pyhalov /*
2*880d7978SAlexander Pyhalov * CDDL HEADER START
3*880d7978SAlexander Pyhalov *
4*880d7978SAlexander Pyhalov * The contents of this file are subject to the terms of the
5*880d7978SAlexander Pyhalov * Common Development and Distribution License (the "License").
6*880d7978SAlexander Pyhalov * You may not use this file except in compliance with the License.
7*880d7978SAlexander Pyhalov *
8*880d7978SAlexander Pyhalov * You can obtain a copy of the license at src/OPENSOLARIS.LICENSE
9*880d7978SAlexander Pyhalov * or http://www.opensolaris.org/os/licensing.
10*880d7978SAlexander Pyhalov * See the License for the specific language governing permissions
11*880d7978SAlexander Pyhalov * and limitations under the License.
12*880d7978SAlexander Pyhalov *
13*880d7978SAlexander Pyhalov * When distributing Covered Code, include this CDDL HEADER in each
14*880d7978SAlexander Pyhalov * file and include the License file at src/OPENSOLARIS.LICENSE.
15*880d7978SAlexander Pyhalov * If applicable, add the following below this CDDL HEADER, with the
16*880d7978SAlexander Pyhalov * fields enclosed by brackets "[]" replaced with your own identifying
17*880d7978SAlexander Pyhalov * information: Portions Copyright [yyyy] [name of copyright owner]
18*880d7978SAlexander Pyhalov *
19*880d7978SAlexander Pyhalov * CDDL HEADER END
20*880d7978SAlexander Pyhalov */
21*880d7978SAlexander Pyhalov
22*880d7978SAlexander Pyhalov /*
23*880d7978SAlexander Pyhalov * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
24*880d7978SAlexander Pyhalov * Use is subject to license terms.
25*880d7978SAlexander Pyhalov */
26*880d7978SAlexander Pyhalov
27*880d7978SAlexander Pyhalov #include <sys/types.h>
28*880d7978SAlexander Pyhalov #include "../inc/common_defs.h"
29*880d7978SAlexander Pyhalov
30*880d7978SAlexander Pyhalov /*
31*880d7978SAlexander Pyhalov * convert utf8 string to unicode
32*880d7978SAlexander Pyhalov * return value: 0 - fail
33*880d7978SAlexander Pyhalov * 1 - success
34*880d7978SAlexander Pyhalov */
35*880d7978SAlexander Pyhalov int
convert_utf8_to_ucs4(uchar_t * ib,int utf8_len,uint_t * unicode)36*880d7978SAlexander Pyhalov convert_utf8_to_ucs4(uchar_t *ib, int utf8_len, uint_t *unicode)
37*880d7978SAlexander Pyhalov {
38*880d7978SAlexander Pyhalov uchar_t first_byte = *ib;
39*880d7978SAlexander Pyhalov uint_t u4;
40*880d7978SAlexander Pyhalov
41*880d7978SAlexander Pyhalov if ( number_of_bytes_in_utf8_char[first_byte] != utf8_len) return 0;
42*880d7978SAlexander Pyhalov
43*880d7978SAlexander Pyhalov u4 = (uint_t)(*ib++ & masks_tbl[utf8_len]);
44*880d7978SAlexander Pyhalov for (; utf8_len > 1; utf8_len--)
45*880d7978SAlexander Pyhalov {
46*880d7978SAlexander Pyhalov u4 = (u4 << ICV_UTF8_BIT_SHIFT) | (((uint_t) *ib) & ICV_UTF8_BIT_MASK);
47*880d7978SAlexander Pyhalov ++ib;
48*880d7978SAlexander Pyhalov }
49*880d7978SAlexander Pyhalov
50*880d7978SAlexander Pyhalov *unicode = u4;
51*880d7978SAlexander Pyhalov
52*880d7978SAlexander Pyhalov return 1;
53*880d7978SAlexander Pyhalov }
54*880d7978SAlexander Pyhalov
55*880d7978SAlexander Pyhalov /*
56*880d7978SAlexander Pyhalov * check whether the input 'str' is valid UTF-8 byte sequence or not,
57*880d7978SAlexander Pyhalov * which lenght is specified by 'utf8_len'
58*880d7978SAlexander Pyhalov *
59*880d7978SAlexander Pyhalov * return: 0 - invalid byte sequence
60*880d7978SAlexander Pyhalov * 1 - valid byte sequence
61*880d7978SAlexander Pyhalov */
62*880d7978SAlexander Pyhalov int
is_valid_utf8_string(uchar_t * str,int utf8_len)63*880d7978SAlexander Pyhalov is_valid_utf8_string(uchar_t *str, int utf8_len)
64*880d7978SAlexander Pyhalov {
65*880d7978SAlexander Pyhalov uint_t unicode = 0;
66*880d7978SAlexander Pyhalov uchar_t *ib = str;
67*880d7978SAlexander Pyhalov uchar_t first_byte;
68*880d7978SAlexander Pyhalov int is_second_byte = 0, len=utf8_len;
69*880d7978SAlexander Pyhalov
70*880d7978SAlexander Pyhalov if (number_of_bytes_in_utf8_char[*ib] == ICV_TYPE_ILLEGAL_CHAR ||
71*880d7978SAlexander Pyhalov number_of_bytes_in_utf8_char[*ib] != utf8_len ) return 0;
72*880d7978SAlexander Pyhalov
73*880d7978SAlexander Pyhalov first_byte = *ib;
74*880d7978SAlexander Pyhalov --utf8_len;
75*880d7978SAlexander Pyhalov ++ib;
76*880d7978SAlexander Pyhalov is_second_byte = 1;
77*880d7978SAlexander Pyhalov
78*880d7978SAlexander Pyhalov while (utf8_len != 0)
79*880d7978SAlexander Pyhalov {
80*880d7978SAlexander Pyhalov if (is_second_byte)
81*880d7978SAlexander Pyhalov {
82*880d7978SAlexander Pyhalov if ( *ib < valid_min_2nd_byte[first_byte] || *ib > valid_max_2nd_byte[first_byte] )
83*880d7978SAlexander Pyhalov return 0;
84*880d7978SAlexander Pyhalov is_second_byte = 0;
85*880d7978SAlexander Pyhalov }
86*880d7978SAlexander Pyhalov else if ((*ib & 0xc0) != 0x80) /* 0x80 -- 0xbf */
87*880d7978SAlexander Pyhalov return 0;
88*880d7978SAlexander Pyhalov
89*880d7978SAlexander Pyhalov --utf8_len;
90*880d7978SAlexander Pyhalov ++ib;
91*880d7978SAlexander Pyhalov }
92*880d7978SAlexander Pyhalov
93*880d7978SAlexander Pyhalov convert_utf8_to_ucs4(str, len, &unicode);
94*880d7978SAlexander Pyhalov if (unicode == 0xFFFE || unicode == 0xFFFF) return 0;
95*880d7978SAlexander Pyhalov
96*880d7978SAlexander Pyhalov return 1;
97*880d7978SAlexander Pyhalov }
98