1/*	$NetBSD: efun.c,v 1.10 2015/07/26 02:20:30 kamil Exp $	*/
2/*	$FreeBSD$ */
3
4/*-
5 * Copyright (c) 2006 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Christos Zoulas.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#if HAVE_NBTOOL_CONFIG_H
34#include "nbtool_config.h"
35#endif
36
37#include <sys/cdefs.h>
38#ifdef __RCSID
39__RCSID("$NetBSD: efun.c,v 1.10 2015/07/26 02:20:30 kamil Exp $");
40#endif
41
42#include <err.h>
43#include <errno.h>
44#include <inttypes.h>
45#include <string.h>
46#include <stdlib.h>
47#include <stdio.h>
48#include <stdarg.h>
49#include <util.h>
50
51static void (*efunc)(int, const char *, ...) = err;
52
53void (*
54esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...)
55{
56	void (*of)(int, const char *, ...) = efunc;
57	efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef;
58	return of;
59}
60
61size_t
62estrlcpy(char *dst, const char *src, size_t len)
63{
64	size_t rv;
65	if ((rv = strlcpy(dst, src, len)) >= len) {
66		errno = ENAMETOOLONG;
67		(*efunc)(1,
68		    "Cannot copy string; %zu chars needed %zu provided",
69		    rv, len);
70	}
71	return rv;
72}
73
74size_t
75estrlcat(char *dst, const char *src, size_t len)
76{
77	size_t rv;
78	if ((rv = strlcat(dst, src, len)) >= len) {
79		errno = ENAMETOOLONG;
80		(*efunc)(1,
81		    "Cannot append to string; %zu chars needed %zu provided",
82		    rv, len);
83	}
84	return rv;
85}
86
87char *
88estrdup(const char *s)
89{
90	char *d = strdup(s);
91	if (d == NULL)
92		(*efunc)(1, "Cannot copy string");
93	return d;
94}
95
96char *
97estrndup(const char *s, size_t len)
98{
99	char *d = strndup(s, len);
100	if (d == NULL)
101		(*efunc)(1, "Cannot copy string");
102	return d;
103}
104
105void *
106emalloc(size_t n)
107{
108	void *p = malloc(n);
109	if (p == NULL && n != 0)
110		(*efunc)(1, "Cannot allocate %zu bytes", n);
111	return p;
112}
113
114void *
115ecalloc(size_t n, size_t s)
116{
117	void *p = calloc(n, s);
118	if (p == NULL && n != 0 && s != 0)
119		(*efunc)(1, "Cannot allocate %zu blocks of size %zu", n, s);
120	return p;
121}
122
123void *
124erealloc(void *p, size_t n)
125{
126	void *q = realloc(p, n);
127	if (q == NULL && n != 0)
128		(*efunc)(1, "Cannot re-allocate %zu bytes", n);
129	return q;
130}
131
132FILE *
133efopen(const char *p, const char *m)
134{
135	FILE *fp = fopen(p, m);
136	if (fp == NULL)
137		(*efunc)(1, "Cannot open `%s'", p);
138	return fp;
139}
140
141int
142easprintf(char ** __restrict ret, const char * __restrict format, ...)
143{
144	int rv;
145	va_list ap;
146	va_start(ap, format);
147	if ((rv = vasprintf(ret, format, ap)) == -1)
148		(*efunc)(1, "Cannot format string");
149	va_end(ap);
150	return rv;
151}
152
153int
154evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap)
155{
156	int rv;
157	if ((rv = vasprintf(ret, format, ap)) == -1)
158		(*efunc)(1, "Cannot format string");
159	return rv;
160}
161