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
50 static void (*efunc)(int, const char *, ...) = err;
51
52 void (*
esetfunc(void (* ef)(int,const char *,...))53 esetfunc(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
60 size_t
estrlcpy(char * dst,const char * src,size_t len)61 estrlcpy(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
73 size_t
estrlcat(char * dst,const char * src,size_t len)74 estrlcat(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
86 char *
estrdup(const char * s)87 estrdup(const char *s)
88 {
89 char *d = strdup(s);
90 if (d == NULL)
91 (*efunc)(1, "Cannot copy string");
92 return d;
93 }
94
95 char *
estrndup(const char * s,size_t len)96 estrndup(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
104 void *
emalloc(size_t n)105 emalloc(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
113 void *
ecalloc(size_t n,size_t s)114 ecalloc(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
122 void *
erealloc(void * p,size_t n)123 erealloc(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
131 FILE *
efopen(const char * p,const char * m)132 efopen(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
140 int
easprintf(char ** __restrict ret,const char * __restrict format,...)141 easprintf(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
152 int
evasprintf(char ** __restrict ret,const char * __restrict format,va_list ap)153 evasprintf(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