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1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
b128c09f BB |
5 | * Common Development and Distribution License (the "License"). |
6 | * You may not use this file except in compliance with the License. | |
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7 | * |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
572e2857 | 22 | * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. |
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23 | */ |
24 | ||
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25 | #include "libuutil_common.h" |
26 | ||
27 | #include <stdarg.h> | |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | ||
32 | void * | |
33 | uu_zalloc(size_t n) | |
34 | { | |
35 | void *p = malloc(n); | |
36 | ||
37 | if (p == NULL) { | |
38 | uu_set_error(UU_ERROR_SYSTEM); | |
39 | return (NULL); | |
40 | } | |
41 | ||
42 | (void) memset(p, 0, n); | |
43 | ||
44 | return (p); | |
45 | } | |
46 | ||
47 | void | |
48 | uu_free(void *p) | |
49 | { | |
50 | free(p); | |
51 | } | |
52 | ||
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53 | char * |
54 | uu_strdup(const char *str) | |
55 | { | |
56 | char *buf = NULL; | |
57 | ||
58 | if (str != NULL) { | |
59 | size_t sz; | |
60 | ||
61 | sz = strlen(str) + 1; | |
62 | buf = uu_zalloc(sz); | |
63 | if (buf != NULL) | |
64 | (void) memcpy(buf, str, sz); | |
65 | } | |
66 | return (buf); | |
67 | } | |
68 | ||
572e2857 BB |
69 | /* |
70 | * Duplicate up to n bytes of a string. Kind of sort of like | |
71 | * strdup(strlcpy(s, n)). | |
72 | */ | |
73 | char * | |
74 | uu_strndup(const char *s, size_t n) | |
75 | { | |
76 | size_t len; | |
77 | char *p; | |
78 | ||
79 | len = strnlen(s, n); | |
80 | p = uu_zalloc(len + 1); | |
81 | if (p == NULL) | |
82 | return (NULL); | |
83 | ||
84 | if (len > 0) | |
85 | (void) memcpy(p, s, len); | |
86 | p[len] = '\0'; | |
87 | ||
88 | return (p); | |
89 | } | |
90 | ||
91 | /* | |
92 | * Duplicate a block of memory. Combines malloc with memcpy, much as | |
93 | * strdup combines malloc, strlen, and strcpy. | |
94 | */ | |
95 | void * | |
96 | uu_memdup(const void *buf, size_t sz) | |
97 | { | |
98 | void *p; | |
99 | ||
100 | p = uu_zalloc(sz); | |
101 | if (p == NULL) | |
102 | return (NULL); | |
103 | (void) memcpy(p, buf, sz); | |
104 | return (p); | |
105 | } | |
106 | ||
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107 | char * |
108 | uu_msprintf(const char *format, ...) | |
109 | { | |
110 | va_list args; | |
111 | char attic[1]; | |
112 | uint_t M, m; | |
113 | char *b; | |
114 | ||
115 | va_start(args, format); | |
116 | M = vsnprintf(attic, 1, format, args); | |
117 | va_end(args); | |
118 | ||
119 | for (;;) { | |
120 | m = M; | |
121 | if ((b = uu_zalloc(m + 1)) == NULL) | |
122 | return (NULL); | |
123 | ||
124 | va_start(args, format); | |
125 | M = vsnprintf(b, m + 1, format, args); | |
126 | va_end(args); | |
127 | ||
128 | if (M == m) | |
129 | break; /* sizes match */ | |
130 | ||
131 | uu_free(b); | |
132 | } | |
133 | ||
134 | return (b); | |
135 | } |