libpcap  1.10.1
About: libpcap is a packet filter library used by tools like tcpdump.
  Fossies Dox: libpcap-1.10.1.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

portability.h
Go to the documentation of this file.
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
46 extern "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
105 extern 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
112 extern 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
#define PCAP_FORMAT_STRING(p)
Definition: funcattrs.h:322
#define PCAP_PRINTFLIKE(x, y)
Definition: funcattrs.h:270
size_t pcap_strlcpy(char *restrict dst, const char *restrict src, size_t dstsize)
Definition: strlcpy.c:34
size_t pcap_strlcat(char *restrict dst, const char *restrict src, size_t dstsize)
Definition: strlcat.c:36
int pcap_vasprintf(char **, const char *, va_list ap)
Definition: asprintf.c:14
int pcap_asprintf(char **, const char *,...)
Definition: asprintf.c:91
char * pcap_strtok_r(char *, const char *, char **)
Definition: strtok_r.c:44