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/* $OpenBSD: util.h,v 1.38 2023/01/29 20:30:21 gnezdo Exp $ */
/*
* Copyright (c) 1998 Todd C. Miller <millert@openbsd.org>
* All rights reserved.
* Copyright (c) 1998 Per Fogelstrom, Opsycon AB
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef __DL_UTIL_H__
#define __DL_UTIL_H__
#include <sys/utsname.h>
#include <stdarg.h>
#include <stddef.h> /* for NULL */
#ifndef __boot
# if DO_CLEAN_BOOT
# define __boot __attribute__((section(".boot.text")))
# define __boot_data __attribute__((section(".boot.data")))
# else
# define __boot
# define __boot_data
# endif
#endif
__BEGIN_HIDDEN_DECLS
void _dl_malloc_init(void) __boot;
void *_dl_malloc(size_t size);
void *_dl_calloc(size_t nmemb, const size_t size);
void *_dl_realloc(void *, size_t size);
void *_dl_reallocarray(void *, size_t nmemb, size_t size);
void _dl_free(void *);
void *_dl_aligned_alloc(size_t _alignment, size_t _size);
char *_dl_strdup(const char *);
size_t _dl_strlen(const char *);
size_t _dl_strlcat(char *dst, const char *src, size_t siz);
void _dl_printf(const char *fmt, ...);
void _dl_vprintf(const char *fmt, va_list ap);
void _dl_dprintf(int, const char *fmt, ...);
void _dl_show_objects(void);
void _dl_arc4randombuf(void *, size_t);
u_int32_t _dl_arc4random(void);
ssize_t _dl_write(int fd, const char* buf, size_t len);
char * _dl_dirname(const char *path);
int _dl___realpath(const char *path, char *resolved);
int _dl_uname(struct utsname *name);
long _dl_strtol(const char *nptr, char **endptr, int base);
__dead void _dl_oom(void);
__dead void _dl_die(const char *, ...) __attribute__((format (printf, 1, 2)));
#define _dl_diedie() _dl_thrkill(0, 9, NULL)
__END_HIDDEN_DECLS
#define _dl_round_page(x) \
(((x) + ((1 << _MAX_PAGE_SHIFT) - 1)) & ~((1 << _MAX_PAGE_SHIFT) - 1))
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
/*
* The following functions are declared inline so they can
* be used before bootstrap linking has been finished.
*/
static inline void *
_dl_memset(void *dst, const int c, size_t n)
{
if (n != 0) {
char *d = dst;
do
*d++ = c;
while (--n != 0);
}
return (dst);
}
static inline void
_dl_bcopy(const void *src, void *dest, int size)
{
unsigned const char *psrc = src;
unsigned char *pdest = dest;
int i;
for (i = 0; i < size; i++)
pdest[i] = psrc[i];
}
static inline size_t
_dl_strlcpy(char *dst, const char *src, size_t siz)
{
char *d = dst;
const char *s = src;
size_t n = siz;
/* Copy as many bytes as will fit */
if (n != 0 && --n != 0) {
do {
if ((*d++ = *s++) == 0)
break;
} while (--n != 0);
}
/* Not enough room in dst, add NUL and traverse rest of src */
if (n == 0) {
if (siz != 0)
*d = '\0'; /* NUL-terminate dst */
while (*s++)
;
}
return(s - src - 1); /* count does not include NUL */
}
static inline int
_dl_strncmp(const char *s1, const char *s2, size_t n)
{
if (n == 0)
return (0);
do {
if (*s1 != *s2++)
return (*(unsigned char *)s1 - *(unsigned char *)--s2);
if (*s1++ == 0)
break;
} while (--n != 0);
return (0);
}
static inline int
_dl_strcmp(const char *s1, const char *s2)
{
while (*s1 == *s2++)
if (*s1++ == 0)
return (0);
return (*(unsigned char *)s1 - *(unsigned char *)--s2);
}
static inline const char *
_dl_strchr(const char *p, const int ch)
{
for (;; ++p) {
if (*p == ch)
return((char *)p);
if (!*p)
return((char *)NULL);
}
/* NOTREACHED */
}
static inline char *
_dl_strrchr(const char *str, const int ch)
{
const char *p;
char *retval = NULL;
for (p = str; *p != '\0'; ++p)
if (*p == ch)
retval = (char *)p;
return retval;
}
static inline char *
_dl_strstr(const char *s, const char *find)
{
char c, sc;
size_t len;
if ((c = *find++) != 0) {
len = _dl_strlen(find);
do {
do {
if ((sc = *s++) == 0)
return (NULL);
} while (sc != c);
} while (_dl_strncmp(s, find, len) != 0);
s--;
}
return ((char *)s);
}
static inline int
_dl_isalnum(int c)
{
return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9');
}
#endif /*__DL_UTIL_H__*/
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