util.h revision 1.17 
1/*	$OpenBSD: util.h,v 1.17 2003/11/11 14:51:01 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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 */
30
31#ifndef __DL_UTIL_H__
32#define __DL_UTIL_H__
33
34#include <stdarg.h>
35
36void *_dl_malloc(const size_t size);
37void _dl_free(void *);
38char *_dl_strdup(const char *);
39void _dl_printf(const char *fmt, ...);
40void _dl_vprintf(const char *fmt, va_list ap);
41void _dl_fdprintf(int, const char *fmt, ...);
42void _dl_show_objects(void);
43unsigned int _dl_random(void);
44ssize_t _dl_write(int fd, const char* buf, size_t len);
45
46void _dl_bcopy(const void *src, void *dest, int size);
47
48long _dl_strtol(const char *nptr, char **endptr, int base);
49
50/*
51 *	The following functions are declared inline so they can
52 *	be used before bootstrap linking has been finished.
53 */
54static inline void
55_dl_wrstderr(const char *s)
56{
57	while (*s) {
58		_dl_write(2, s, 1);
59		s++;
60	}
61}
62
63static inline void *
64_dl_memset(void *dst, const int c, size_t n)
65{
66	if (n != 0) {
67		char *d = dst;
68
69		do
70			*d++ = c;
71		while (--n != 0);
72	}
73	return (dst);
74}
75
76static inline int
77_dl_strlen(const char *str)
78{
79	const char *s;
80
81	for (s = str; *s; ++s)
82		;
83	return (s - str);
84}
85
86static inline size_t
87_dl_strlcpy(char *dst, const char *src, size_t siz)
88{
89	char *d = dst;
90	const char *s = src;
91	size_t n = siz;
92
93	/* Copy as many bytes as will fit */
94	if (n != 0 && --n != 0) {
95		do {
96			if ((*d++ = *s++) == 0)
97				break;
98		} while (--n != 0);
99	}
100
101	/* Not enough room in dst, add NUL and traverse rest of src */
102	if (n == 0) {
103		if (siz != 0)
104			*d = '\0';		/* NUL-terminate dst */
105		while (*s++)
106			;
107	}
108
109	return(s - src - 1);	/* count does not include NUL */
110}
111
112static inline int
113_dl_strncmp(const char *s1, const char *s2, size_t n)
114{
115	if (n == 0)
116		return (0);
117	do {
118		if (*s1 != *s2++)
119			return (*(unsigned char *)s1 - *(unsigned char *)--s2);
120		if (*s1++ == 0)
121			break;
122	} while (--n != 0);
123	return (0);
124}
125
126static inline int
127_dl_strcmp(const char *s1, const char *s2)
128{
129	while (*s1 == *s2++)
130		if (*s1++ == 0)
131			return (0);
132	return (*(unsigned char *)s1 - *(unsigned char *)--s2);
133}
134
135static inline const char *
136_dl_strchr(const char *p, const int ch)
137{
138	for (;; ++p) {
139		if (*p == ch)
140			return((char *)p);
141		if (!*p)
142			return((char *)NULL);
143	}
144	/* NOTREACHED */
145}
146
147static inline char *
148_dl_strstr(const char *s, const char *find)
149{
150	char c, sc;
151	size_t len;
152	if ((c = *find++) != 0) {
153		len = _dl_strlen(find);
154		do {
155			do {
156				if ((sc = *s++) == 0)
157					return (NULL);
158			} while (sc != c);
159		} while (_dl_strncmp(s, find, len) != 0);
160		s--;
161	}
162	return ((char *)s);
163}
164
165#endif /*__DL_UTIL_H__*/
166