1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 *
21 * $FreeBSD$
22 */
23/*
24 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
25 * Use is subject to license terms.
26 */
27
28#include <sys/param.h>
29#include <sys/string.h>
30#include <sys/kmem.h>
31#include <machine/stdarg.h>
32
33#define	IS_DIGIT(c)	((c) >= '0' && (c) <= '9')
34
35#define	IS_ALPHA(c)	\
36	(((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
37
38char *
39strpbrk(const char *s, const char *b)
40{
41	const char *p;
42
43	do {
44		for (p = b; *p != '\0' && *p != *s; ++p)
45			;
46		if (*p != '\0')
47			return ((char *)s);
48	} while (*s++);
49
50	return (NULL);
51}
52
53/*
54 * Convert a string into a valid C identifier by replacing invalid
55 * characters with '_'.  Also makes sure the string is nul-terminated
56 * and takes up at most n bytes.
57 */
58void
59strident_canon(char *s, size_t n)
60{
61	char c;
62	char *end = s + n - 1;
63
64	if ((c = *s) == 0)
65		return;
66
67	if (!IS_ALPHA(c) && c != '_')
68		*s = '_';
69
70	while (s < end && ((c = *(++s)) != 0)) {
71		if (!IS_ALPHA(c) && !IS_DIGIT(c) && c != '_')
72			*s = '_';
73	}
74	*s = 0;
75}
76
77/*
78 * Do not change the length of the returned string; it must be freed
79 * with strfree().
80 */
81char *
82kmem_asprintf(const char *fmt, ...)
83{
84	int size;
85	va_list adx;
86	char *buf;
87
88	va_start(adx, fmt);
89	size = vsnprintf(NULL, 0, fmt, adx) + 1;
90	va_end(adx);
91
92	buf = kmem_alloc(size, KM_SLEEP);
93
94	va_start(adx, fmt);
95	(void) vsnprintf(buf, size, fmt, adx);
96	va_end(adx);
97
98	return (buf);
99}
100
101void
102strfree(char *str)
103{
104	ASSERT(str != NULL);
105	kmem_free(str, strlen(str) + 1);
106}
107