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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* $FreeBSD$
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/string.h>
#include <sys/kmem.h>
#include <machine/stdarg.h>
#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9')
#define IS_ALPHA(c) \
(((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
char *
strpbrk(const char *s, const char *b)
{
const char *p;
do {
for (p = b; *p != '\0' && *p != *s; ++p)
;
if (*p != '\0')
return ((char *)s);
} while (*s++);
return (NULL);
}
/*
* Convert a string into a valid C identifier by replacing invalid
* characters with '_'. Also makes sure the string is nul-terminated
* and takes up at most n bytes.
*/
void
strident_canon(char *s, size_t n)
{
char c;
char *end = s + n - 1;
if ((c = *s) == 0)
return;
if (!IS_ALPHA(c) && c != '_')
*s = '_';
while (s < end && ((c = *(++s)) != 0)) {
if (!IS_ALPHA(c) && !IS_DIGIT(c) && c != '_')
*s = '_';
}
*s = 0;
}
/*
* Do not change the length of the returned string; it must be freed
* with strfree().
*/
char *
kmem_asprintf(const char *fmt, ...)
{
int size;
va_list adx;
char *buf;
va_start(adx, fmt);
size = vsnprintf(NULL, 0, fmt, adx) + 1;
va_end(adx);
buf = kmem_alloc(size, KM_SLEEP);
va_start(adx, fmt);
(void) vsnprintf(buf, size, fmt, adx);
va_end(adx);
return (buf);
}
void
kmem_strfree(char *str)
{
ASSERT3P(str, !=, NULL);
kmem_free(str, strlen(str) + 1);
}
/*
* kmem_scnprintf() will return the number of characters that it would have
* printed whenever it is limited by value of the size variable, rather than
* the number of characters that it did print. This can cause misbehavior on
* subsequent uses of the return value, so we define a safe version that will
* return the number of characters actually printed, minus the NULL format
* character. Subsequent use of this by the safe string functions is safe
* whether it is snprintf(), strlcat() or strlcpy().
*/
int
kmem_scnprintf(char *restrict str, size_t size, const char *restrict fmt, ...)
{
int n;
va_list ap;
/* Make the 0 case a no-op so that we do not return -1 */
if (size == 0)
return (0);
va_start(ap, fmt);
n = vsnprintf(str, size, fmt, ap);
va_end(ap);
if (n >= size)
n = size - 1;
return (n);
}
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