1/*	$NetBSD: efun.c,v 1.10 2015/07/26 02:20:30 kamil 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 1.10 2015/07/26 02:20:30 kamil Exp $");
39#endif
40
41#include <err.h>
42#include <errno.h>
43#include <inttypes.h>
44#include <string.h>
45#include <stdlib.h>
46#include <stdio.h>
47#include <stdarg.h>
48#include <util.h>
49
50static void (*efunc)(int, const char *, ...) = err;
51
52void (*
53esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...)
54{
55	void (*of)(int, const char *, ...) = efunc;
56	efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef;
57	return of;
58}
59
60size_t
61estrlcpy(char *dst, const char *src, size_t len)
62{
63	size_t rv;
64	if ((rv = strlcpy(dst, src, len)) >= len) {
65		errno = ENAMETOOLONG;
66		(*efunc)(1,
67		    "Cannot copy string; %zu chars needed %zu provided",
68		    rv, len);
69	}
70	return rv;
71}
72
73size_t
74estrlcat(char *dst, const char *src, size_t len)
75{
76	size_t rv;
77	if ((rv = strlcat(dst, src, len)) >= len) {
78		errno = ENAMETOOLONG;
79		(*efunc)(1,
80		    "Cannot append to string; %zu chars needed %zu provided",
81		    rv, len);
82	}
83	return rv;
84}
85
86char *
87estrdup(const char *s)
88{
89	char *d = strdup(s);
90	if (d == NULL)
91		(*efunc)(1, "Cannot copy string");
92	return d;
93}
94
95char *
96estrndup(const char *s, size_t len)
97{
98	char *d = strndup(s, len);
99	if (d == NULL)
100		(*efunc)(1, "Cannot copy string");
101	return d;
102}
103
104void *
105emalloc(size_t n)
106{
107	void *p = malloc(n);
108	if (p == NULL && n != 0)
109		(*efunc)(1, "Cannot allocate %zu bytes", n);
110	return p;
111}
112
113void *
114ecalloc(size_t n, size_t s)
115{
116	void *p = calloc(n, s);
117	if (p == NULL && n != 0 && s != 0)
118		(*efunc)(1, "Cannot allocate %zu blocks of size %zu", n, s);
119	return p;
120}
121
122void *
123erealloc(void *p, size_t n)
124{
125	void *q = realloc(p, n);
126	if (q == NULL && n != 0)
127		(*efunc)(1, "Cannot re-allocate %zu bytes", n);
128	return q;
129}
130
131FILE *
132efopen(const char *p, const char *m)
133{
134	FILE *fp = fopen(p, m);
135	if (fp == NULL)
136		(*efunc)(1, "Cannot open `%s'", p);
137	return fp;
138}
139
140int
141easprintf(char ** __restrict ret, const char * __restrict format, ...)
142{
143	int rv;
144	va_list ap;
145	va_start(ap, format);
146	if ((rv = vasprintf(ret, format, ap)) == -1)
147		(*efunc)(1, "Cannot format string");
148	va_end(ap);
149	return rv;
150}
151
152int
153evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap)
154{
155	int rv;
156	if ((rv = vasprintf(ret, format, ap)) == -1)
157		(*efunc)(1, "Cannot format string");
158	return rv;
159}
160