efun.c revision 1.6 
1/*	$NetBSD: efun.c,v 1.6 2008/04/28 20:23:02 martin Exp $	*/
2
3/*-
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#if HAVE_NBTOOL_CONFIG_H
33#include "nbtool_config.h"
34#endif
35
36#include <sys/cdefs.h>
37#ifdef __RCSID
38__RCSID("$NetBSD: efun.c,v 1.6 2008/04/28 20:23:02 martin Exp $");
39#endif
40
41#include <err.h>
42#include <errno.h>
43#include <string.h>
44#include <stdlib.h>
45#include <stdio.h>
46#include <stdarg.h>
47#include <util.h>
48
49static void (*efunc)(int, const char *, ...) = err;
50
51void (*
52esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...)
53{
54	void (*of)(int, const char *, ...) = efunc;
55	efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef;
56	return of;
57}
58
59size_t
60estrlcpy(char *dst, const char *src, size_t len)
61{
62	size_t rv;
63	if ((rv = strlcpy(dst, src, len)) >= len) {
64		errno = ENAMETOOLONG;
65		(*efunc)(1,
66		    "Cannot copy string; %zu chars needed %zu provided",
67		    rv, len);
68	}
69	return rv;
70}
71
72size_t
73estrlcat(char *dst, const char *src, size_t len)
74{
75	size_t rv;
76	if ((rv = strlcat(dst, src, len)) >= len) {
77		errno = ENAMETOOLONG;
78		(*efunc)(1,
79		    "Cannot append to string; %zu chars needed %zu provided",
80		    rv, len);
81	}
82	return rv;
83}
84
85char *
86estrdup(const char *s)
87{
88	char *d = strdup(s);
89	if (d == NULL)
90		(*efunc)(1, "Cannot copy string");
91	return d;
92}
93
94char *
95estrndup(const char *s, size_t len)
96{
97	char *d = strndup(s, len);
98	if (d == NULL)
99		(*efunc)(1, "Cannot copy string");
100	return d;
101}
102
103void *
104emalloc(size_t n)
105{
106	void *p = malloc(n);
107	if (p == NULL)
108		(*efunc)(1, "Cannot allocate %zu bytes", n);
109	return p;
110}
111
112void *
113ecalloc(size_t n, size_t s)
114{
115	void *p = calloc(n, s);
116	if (p == NULL)
117		(*efunc)(1, "Cannot allocate %zu bytes", n);
118	return p;
119}
120
121void *
122erealloc(void *p, size_t n)
123{
124	void *q = realloc(p, n);
125	if (q == NULL)
126		(*efunc)(1, "Cannot re-allocate %zu bytes", n);
127	return q;
128}
129
130FILE *
131efopen(const char *p, const char *m)
132{
133	FILE *fp = fopen(p, m);
134	if (fp == NULL)
135		(*efunc)(1, "Cannot open `%s'", p);
136	return fp;
137}
138
139int
140easprintf(char ** __restrict ret, const char * __restrict format, ...)
141{
142	int rv;
143	va_list ap;
144	va_start(ap, format);
145	if ((rv = vasprintf(ret, format, ap)) == -1)
146		(*efunc)(1, "Cannot format string");
147	va_end(ap);
148	return rv;
149}
150
151int
152evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap)
153{
154	int rv;
155	if ((rv = vasprintf(ret, format, ap)) == -1)
156		(*efunc)(1, "Cannot format string");
157	return rv;
158}
159