The Tcpdump Group git mirrors - libpcap/blob - portability.h

   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 HAVE_STRLCAT
  46   #define pcap_strlcat  strlcat
  47 #else
  48   #if defined(_MSC_VER) || defined(__MINGW32__)
  49     /*
  50      * strncat_s() is supported at least back to Visual
  51      * Studio 2005; we require Visual Studio 2015 or later.
  52      */
  53     #define pcap_strlcat(x, y, z) \
  54         strncat_s((x), (z), (y), _TRUNCATE)
  55   #else
  56     /*
  57      * Define it ourselves.
  58      */
  59     PCAP_UNEXPORTED_C_FUNC size_t pcap_strlcat(char * restrict dst, const char * restrict src, size_t dstsize);
  60   #endif
  61 #endif
  62
  63 #ifdef HAVE_STRLCPY
  64   #define pcap_strlcpy  strlcpy
  65 #else
  66   #if defined(_MSC_VER) || defined(__MINGW32__)
  67     /*
  68      * strncpy_s() is supported at least back to Visual
  69      * Studio 2005; we require Visual Studio 2015 or later.
  70      */
  71     #define pcap_strlcpy(x, y, z) \
  72         strncpy_s((x), (z), (y), _TRUNCATE)
  73   #else
  74     /*
  75      * Define it ourselves.
  76      */
  77     PCAP_UNEXPORTED_C_FUNC size_t pcap_strlcpy(char * restrict dst, const char * restrict src, size_t dstsize);
  78   #endif
  79 #endif
  80
  81 #ifdef _MSC_VER
  82   /*
  83    * If <crtdbg.h> has been included, and _DEBUG is defined, and
  84    * __STDC__ is zero, <crtdbg.h> will define strdup() to call
  85    * _strdup_dbg().  So if it's already defined, don't redefine
  86    * it.
  87    */
  88   #ifndef strdup
  89   #define strdup        _strdup
  90   #endif
  91 #endif
  92
  93 /*
  94  * We want asprintf(), for some cases where we use it to construct
  95  * dynamically-allocated variable-length strings; it's present on
  96  * some, but not all, platforms.
  97  */
  98 #ifdef HAVE_ASPRINTF
  99 #define pcap_asprintf asprintf
 100 #else
 101 PCAP_UNEXPORTED_C_FUNC int pcap_asprintf(char **, PCAP_FORMAT_STRING(const char *), ...)
 102     PCAP_PRINTFLIKE(2, 3);
 103 #endif
 104
 105 #ifdef HAVE_VASPRINTF
 106 #define pcap_vasprintf vasprintf
 107 #else
 108 PCAP_UNEXPORTED_C_FUNC int pcap_vasprintf(char **, const char *, va_list ap);
 109 #endif
 110
 111 #ifdef HAVE_STRTOK_R
 112   #define pcap_strtok_r strtok_r
 113 #else
 114   #ifdef _WIN32
 115     /*
 116      * Microsoft gives it a different name.
 117      */
 118     #define pcap_strtok_r       strtok_s
 119   #else
 120     /*
 121      * Define it ourselves.
 122      */
 123     PCAP_UNEXPORTED_C_FUNC char *pcap_strtok_r(char *, const char *, char **);
 124   #endif
 125 #endif /* HAVE_STRTOK_R */
 126
 127 #ifdef _WIN32
 128   #if !defined(__cplusplus)
 129     #define inline __inline
 130   #endif
 131 #endif /* _WIN32 */
 132
 133 #endif