/*	$OpenBSD: util.h,v 1.6 2002/05/28 00:23:57 deraadt Exp $	*/

/*
 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed under OpenBSD by
 *	Per Fogelstrom, Opsycon AB, Sweden.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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__
int _dl_write(int, const char *, int);
void *_dl_malloc(const int size);
void _dl_free(void *);
char *_dl_strdup(const char *);
void _dl_printf(const char *fmt, ...);
void _dl_show_objects(void);

/*
 *	The following functions are declared inline so they can
 *	be used before bootstrap linking has been finished.
 */
static inline void
_dl_wrstderr(const char *s)
{
	while (*s) {
		_dl_write(2, s, 1);
		s++;
	}
}

static inline void *
_dl_memset(void *p, const char v, size_t c)
{
	char *ip = p;

	while (c--)
		*ip++ = v;
	return(p);
}

static inline int
_dl_strlen(const char *p)
{
	const char *s = p;

	while (*s != '\0')
		s++;
	return(s - p);
}

static inline size_t
_dl_strlcpy(char *dst, const char *src, int 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 *d, const char *s, int c)
{
	while (c-- && *d && *d == *s) {
		d++;
		s++;
	}
	if (c < 0)
		return(0);
	return(*d - *s);
}

static inline int
_dl_strcmp(const char *d, const char *s)
{
	while (*d && *d == *s) {
		d++;
		s++;
	}
	return(*d - *s);
}

static inline const char *
_dl_strchr(const char *p, const int c)
{
	while (*p) {
		if (*p == c)
			return(p);
		p++;
	}
	return(0);
}

#endif /*__DL_UTIL_H__*/