1/*
2 * Copyright (c) 1994, 1995, 1996
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the Computer Systems
16 *	Engineering Group at Lawrence Berkeley Laboratory.
17 * 4. Neither the name of the University nor of the Laboratory may be used
18 *    to endorse or promote products derived from this software without
19 *    specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef portability_h
35#define	portability_h
36
37/*
38 * Helpers for portability between Windows and UN*X and between different
39 * flavors of UN*X.
40 */
41#include <stdarg.h>	/* we declare varargs functions on some platforms */
42
43#include "pcap/funcattrs.h"
44
45#ifdef __cplusplus
46extern "C" {
47#endif
48
49#ifdef HAVE_STRLCAT
50  #define pcap_strlcat	strlcat
51#else
52  #if defined(_MSC_VER) || defined(__MINGW32__)
53    /*
54     * strncat_s() is supported at least back to Visual
55     * Studio 2005; we require Visual Studio 2015 or later.
56     */
57    #define pcap_strlcat(x, y, z) \
58	strncat_s((x), (z), (y), _TRUNCATE)
59  #else
60    /*
61     * Define it ourselves.
62     */
63    extern size_t pcap_strlcat(char * restrict dst, const char * restrict src, size_t dstsize);
64  #endif
65#endif
66
67#ifdef HAVE_STRLCPY
68  #define pcap_strlcpy	strlcpy
69#else
70  #if defined(_MSC_VER) || defined(__MINGW32__)
71    /*
72     * strncpy_s() is supported at least back to Visual
73     * Studio 2005; we require Visual Studio 2015 or later.
74     */
75    #define pcap_strlcpy(x, y, z) \
76	strncpy_s((x), (z), (y), _TRUNCATE)
77  #else
78    /*
79     * Define it ourselves.
80     */
81    extern size_t pcap_strlcpy(char * restrict dst, const char * restrict src, size_t dstsize);
82  #endif
83#endif
84
85#ifdef _MSC_VER
86  /*
87   * If <crtdbg.h> has been included, and _DEBUG is defined, and
88   * __STDC__ is zero, <crtdbg.h> will define strdup() to call
89   * _strdup_dbg().  So if it's already defined, don't redefine
90   * it.
91   */
92  #ifndef strdup
93  #define strdup	_strdup
94  #endif
95#endif
96
97/*
98 * We want asprintf(), for some cases where we use it to construct
99 * dynamically-allocated variable-length strings; it's present on
100 * some, but not all, platforms.
101 */
102#ifdef HAVE_ASPRINTF
103#define pcap_asprintf asprintf
104#else
105extern int pcap_asprintf(char **, PCAP_FORMAT_STRING(const char *), ...)
106    PCAP_PRINTFLIKE(2, 3);
107#endif
108
109#ifdef HAVE_VASPRINTF
110#define pcap_vasprintf vasprintf
111#else
112extern int pcap_vasprintf(char **, const char *, va_list ap);
113#endif
114
115/* For Solaris before 11. */
116#ifndef timeradd
117#define timeradd(a, b, result)                       \
118  do {                                               \
119    (result)->tv_sec = (a)->tv_sec + (b)->tv_sec;    \
120    (result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
121    if ((result)->tv_usec >= 1000000) {              \
122      ++(result)->tv_sec;                            \
123      (result)->tv_usec -= 1000000;                  \
124    }                                                \
125  } while (0)
126#endif /* timeradd */
127#ifndef timersub
128#define timersub(a, b, result)                       \
129  do {                                               \
130    (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;    \
131    (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
132    if ((result)->tv_usec < 0) {                     \
133      --(result)->tv_sec;                            \
134      (result)->tv_usec += 1000000;                  \
135    }                                                \
136  } while (0)
137#endif /* timersub */
138
139#ifdef HAVE_STRTOK_R
140  #define pcap_strtok_r	strtok_r
141#else
142  #ifdef _WIN32
143    /*
144     * Microsoft gives it a different name.
145     */
146    #define pcap_strtok_r	strtok_s
147  #else
148    /*
149     * Define it ourselves.
150     */
151    extern char *pcap_strtok_r(char *, const char *, char **);
152  #endif
153#endif /* HAVE_STRTOK_R */
154
155#ifdef _WIN32
156  #if !defined(__cplusplus)
157    #define inline __inline
158  #endif
159#endif /* _WIN32 */
160
161#ifdef __cplusplus
162}
163#endif
164
165#endif
166