buf_str.c revision 291721 
1/* crypto/buffer/buffer.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <limits.h>
62#include <openssl/buffer.h>
63
64char *BUF_strdup(const char *str)
65{
66    if (str == NULL)
67        return NULL;
68    return BUF_strndup(str, strlen(str));
69}
70
71char *BUF_strndup(const char *str, size_t siz)
72{
73    char *ret;
74
75    if (str == NULL)
76        return NULL;
77
78    if (siz >= INT_MAX)
79        return NULL;
80
81    ret = OPENSSL_malloc(siz + 1);
82    if (ret == NULL) {
83        BUFerr(BUF_F_BUF_STRNDUP, ERR_R_MALLOC_FAILURE);
84        return NULL;
85    }
86
87    memcpy(ret, str, siz);
88    ret[siz] = '\0';
89
90    return (ret);
91}
92
93void *BUF_memdup(const void *data, size_t siz)
94{
95    void *ret;
96
97    if (data == NULL || siz >= INT_MAX)
98        return NULL;
99
100    ret = OPENSSL_malloc(siz);
101    if (ret == NULL) {
102        BUFerr(BUF_F_BUF_MEMDUP, ERR_R_MALLOC_FAILURE);
103        return NULL;
104    }
105    return memcpy(ret, data, siz);
106}
107
108size_t BUF_strlcpy(char *dst, const char *src, size_t size)
109{
110    size_t l = 0;
111    for (; size > 1 && *src; size--) {
112        *dst++ = *src++;
113        l++;
114    }
115    if (size)
116        *dst = '\0';
117    return l + strlen(src);
118}
119
120size_t BUF_strlcat(char *dst, const char *src, size_t size)
121{
122    size_t l = 0;
123    for (; size > 0 && *dst; size--, dst++)
124        l++;
125    return l + BUF_strlcpy(dst, src, size);
126}
127