util.h revision 1.13 
1/*	$OpenBSD: util.h,v 1.13 2003/05/30 01:13:53 drahn Exp $	*/
2
3/*
4 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5 * All rights reserved.
6 * Copyright (c) 1998 Per Fogelstrom, Opsycon AB
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 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed under OpenBSD by
19 *	Per Fogelstrom, Opsycon AB, Sweden.
20 * 4. The name of the author may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
24 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
27 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 */
36
37#ifndef __DL_UTIL_H__
38#define __DL_UTIL_H__
39void *_dl_malloc(const size_t size);
40void _dl_free(void *);
41char *_dl_strdup(const char *);
42void _dl_printf(const char *fmt, ...);
43void _dl_fdprintf(int, const char *fmt, ...);
44void _dl_show_objects(void);
45unsigned int _dl_random(void);
46
47/*
48 *	The following functions are declared inline so they can
49 *	be used before bootstrap linking has been finished.
50 */
51static inline void
52_dl_wrstderr(const char *s)
53{
54	while (*s) {
55		_dl_write(2, s, 1);
56		s++;
57	}
58}
59
60static inline void *
61_dl_memset(void *dst, const int c, size_t n)
62{
63	if (n != 0) {
64		register char *d = dst;
65
66		do
67			*d++ = c;
68		while (--n != 0);
69	}
70	return (dst);
71}
72
73static inline int
74_dl_strlen(const char *str)
75{
76	const char *s;
77
78	for (s = str; *s; ++s)
79		;
80	return (s - str);
81}
82
83static inline size_t
84_dl_strlcpy(char *dst, const char *src, size_t siz)
85{
86	char *d = dst;
87	const char *s = src;
88	size_t n = siz;
89
90	/* Copy as many bytes as will fit */
91	if (n != 0 && --n != 0) {
92		do {
93			if ((*d++ = *s++) == 0)
94				break;
95		} while (--n != 0);
96	}
97
98	/* Not enough room in dst, add NUL and traverse rest of src */
99	if (n == 0) {
100		if (siz != 0)
101			*d = '\0';		/* NUL-terminate dst */
102		while (*s++)
103			;
104	}
105
106	return(s - src - 1);	/* count does not include NUL */
107}
108
109static inline int
110_dl_strncmp(const char *s1, const char *s2, size_t n)
111{
112	if (n == 0)
113		return (0);
114	do {
115		if (*s1 != *s2++)
116			return (*(unsigned char *)s1 - *(unsigned char *)--s2);
117		if (*s1++ == 0)
118			break;
119	} while (--n != 0);
120	return (0);
121}
122
123static inline int
124_dl_strcmp(const char *s1, const char *s2)
125{
126	while (*s1 == *s2++)
127		if (*s1++ == 0)
128			return (0);
129	return (*(unsigned char *)s1 - *(unsigned char *)--s2);
130}
131
132static inline const char *
133_dl_strchr(const char *p, const int ch)
134{
135	for (;; ++p) {
136		if (*p == ch)
137			return((char *)p);
138		if (!*p)
139			return((char *)NULL);
140	}
141	/* NOTREACHED */
142}
143
144#endif /*__DL_UTIL_H__*/
145