1 /*
2 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
3 * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
4 * at Electronni Visti IA, Kiev, Ukraine.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "lint.h"
30 #include "file64.h"
31 #include <alloca.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <errno.h>
35 #include <wchar.h>
36 #include "collate.h"
37
38 #define ALLOCA_LIMIT 16
39
40 /*
41 * In order to properly handle multibyte locales, its easiet to just
42 * convert to wide characters and then use wcscoll. However if an
43 * error occurs, we gracefully fall back to simple strcmp. Caller
44 * should check errno.
45 */
46 int
47 strcoll(const char *s1, const char *s2)
48 {
49 int ret;
50 wchar_t *t1 = NULL, *t2 = NULL;
51 wchar_t *w1 = NULL, *w2 = NULL;
52 size_t sz1, sz2;
53
54 if (_collate_load_error)
55 goto error;
56
57 sz1 = strlen(s1) + 1;
58 sz2 = strlen(s2) + 1;
59
60 /*
61 * Simple assumption: conversion to wide format is strictly
62 * reducing, i.e. a single byte (or multibyte character)
63 * cannot result in multiple wide characters.
64 *
65 * We gain a bit of performance by giving preference to alloca
66 * for small string allocations.
67 */
68 if (sz1 > ALLOCA_LIMIT) {
69 if ((t1 = malloc(sz1 * sizeof (wchar_t))) == NULL)
70 goto error;
71 w1 = t1;
72 } else {
73 if ((w1 = alloca(sz1 * sizeof (wchar_t))) == NULL)
74 goto error;
75 }
76 if (sz2 > ALLOCA_LIMIT) {
77 if ((t2 = malloc(sz2 * sizeof (wchar_t))) == NULL)
78 goto error;
79 w2 = t2;
80 } else {
81 if ((w2 = alloca(sz2 * sizeof (wchar_t))) == NULL)
82 goto error;
83 }
84
85 if ((mbstowcs(w1, s1, sz1)) == (size_t)-1)
86 goto error;
87
88 if ((mbstowcs(w2, s2, sz2)) == (size_t)-1)
89 goto error;
90
91 ret = wcscoll(w1, w2);
92 if (t1)
93 free(t1);
94 if (t2)
95 free(t2);
96
97 return (ret);
98
99 error:
100 if (t1)
101 free(t1);
102 if (t2)
103 free(t2);
104 return (strcmp(s1, s2));
105 }
|
1 /*
2 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
4 * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
5 * at Electronni Visti IA, Kiev, Ukraine.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include "lint.h"
31 #include "file64.h"
32 #include <alloca.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <errno.h>
36 #include <wchar.h>
37 #include <xlocale.h>
38 #include "localeimpl.h"
39 #include "collate.h"
40
41 #define ALLOCA_LIMIT 16
42
43 /*
44 * In order to properly handle multibyte locales, its easiet to just
45 * convert to wide characters and then use wcscoll. However if an
46 * error occurs, we gracefully fall back to simple strcmp. Caller
47 * should check errno.
48 */
49 int
50 strcoll_l(const char *s1, const char *s2, locale_t loc)
51 {
52 int ret;
53 wchar_t *t1 = NULL, *t2 = NULL;
54 wchar_t *w1 = NULL, *w2 = NULL;
55 size_t sz1, sz2;
56 const struct lc_collate *lcc = loc->collate;
57
58 mbstate_t mbs1 = { 0 }; /* initial states */
59 mbstate_t mbs2 = { 0 };
60
61 if (lcc->lc_is_posix)
62 return (strcmp(s1, s2));
63
64 sz1 = strlen(s1) + 1;
65 sz2 = strlen(s2) + 1;
66
67 /*
68 * Simple assumption: conversion to wide format is strictly
69 * reducing, i.e. a single byte (or multibyte character)
70 * cannot result in multiple wide characters.
71 *
72 * We gain a bit of performance by giving preference to alloca
73 * for small string allocations.
74 */
75 if (sz1 > ALLOCA_LIMIT) {
76 if ((t1 = malloc(sz1 * sizeof (wchar_t))) == NULL)
77 goto error;
78 w1 = t1;
79 } else {
80 if ((w1 = alloca(sz1 * sizeof (wchar_t))) == NULL)
81 goto error;
82 }
83 if (sz2 > ALLOCA_LIMIT) {
84 if ((t2 = malloc(sz2 * sizeof (wchar_t))) == NULL)
85 goto error;
86 w2 = t2;
87 } else {
88 if ((w2 = alloca(sz2 * sizeof (wchar_t))) == NULL)
89 goto error;
90 }
91
92 if ((mbsrtowcs_l(w1, &s1, sz1, &mbs1, loc)) == (size_t)-1)
93 goto error;
94
95 if ((mbsrtowcs_l(w2, &s2, sz2, &mbs2, loc)) == (size_t)-1)
96 goto error;
97
98 ret = wcscoll_l(w1, w2, loc);
99 if (t1)
100 free(t1);
101 if (t2)
102 free(t2);
103
104 return (ret);
105
106 error:
107 if (t1)
108 free(t1);
109 if (t2)
110 free(t2);
111 return (strcmp(s1, s2));
112 }
113
114 int
115 strcoll(const char *s1, const char *s2)
116 {
117 return (strcoll_l(s1, s2, uselocale(NULL)));
118 }
|