efun.c revision 1.5 
1/*	$NetBSD: efun.c,v 1.5 2007/07/01 21:41:16 pooka 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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#if HAVE_NBTOOL_CONFIG_H
40#include "nbtool_config.h"
41#endif
42
43#include <sys/cdefs.h>
44#ifdef __RCSID
45__RCSID("$NetBSD: efun.c,v 1.5 2007/07/01 21:41:16 pooka Exp $");
46#endif
47
48#include <err.h>
49#include <errno.h>
50#include <string.h>
51#include <stdlib.h>
52#include <stdio.h>
53#include <stdarg.h>
54#include <util.h>
55
56static void (*efunc)(int, const char *, ...) = err;
57
58void (*
59esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...)
60{
61	void (*of)(int, const char *, ...) = efunc;
62	efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef;
63	return of;
64}
65
66size_t
67estrlcpy(char *dst, const char *src, size_t len)
68{
69	size_t rv;
70	if ((rv = strlcpy(dst, src, len)) >= len) {
71		errno = ENAMETOOLONG;
72		(*efunc)(1,
73		    "Cannot copy string; %zu chars needed %zu provided",
74		    rv, len);
75	}
76	return rv;
77}
78
79size_t
80estrlcat(char *dst, const char *src, size_t len)
81{
82	size_t rv;
83	if ((rv = strlcat(dst, src, len)) >= len) {
84		errno = ENAMETOOLONG;
85		(*efunc)(1,
86		    "Cannot append to string; %zu chars needed %zu provided",
87		    rv, len);
88	}
89	return rv;
90}
91
92char *
93estrdup(const char *s)
94{
95	char *d = strdup(s);
96	if (d == NULL)
97		(*efunc)(1, "Cannot copy string");
98	return d;
99}
100
101char *
102estrndup(const char *s, size_t len)
103{
104	char *d = strndup(s, len);
105	if (d == NULL)
106		(*efunc)(1, "Cannot copy string");
107	return d;
108}
109
110void *
111emalloc(size_t n)
112{
113	void *p = malloc(n);
114	if (p == NULL)
115		(*efunc)(1, "Cannot allocate %zu bytes", n);
116	return p;
117}
118
119void *
120ecalloc(size_t n, size_t s)
121{
122	void *p = calloc(n, s);
123	if (p == NULL)
124		(*efunc)(1, "Cannot allocate %zu bytes", n);
125	return p;
126}
127
128void *
129erealloc(void *p, size_t n)
130{
131	void *q = realloc(p, n);
132	if (q == NULL)
133		(*efunc)(1, "Cannot re-allocate %zu bytes", n);
134	return q;
135}
136
137FILE *
138efopen(const char *p, const char *m)
139{
140	FILE *fp = fopen(p, m);
141	if (fp == NULL)
142		(*efunc)(1, "Cannot open `%s'", p);
143	return fp;
144}
145
146int
147easprintf(char ** __restrict ret, const char * __restrict format, ...)
148{
149	int rv;
150	va_list ap;
151	va_start(ap, format);
152	if ((rv = vasprintf(ret, format, ap)) == -1)
153		(*efunc)(1, "Cannot format string");
154	va_end(ap);
155	return rv;
156}
157
158int
159evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap)
160{
161	int rv;
162	if ((rv = vasprintf(ret, format, ap)) == -1)
163		(*efunc)(1, "Cannot format string");
164	return rv;
165}
166