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libs/libpcap-1.9.0/portability.h 5.11 KB
fee2cbd6   amoreau   ajout des librairies
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  /*
   * Copyright (c) 1994, 1995, 1996
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the Computer Systems
   *	Engineering Group at Lawrence Berkeley Laboratory.
   * 4. Neither the name of the University nor of the Laboratory may be used
   *    to endorse or promote products derived from this software without
   *    specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #ifndef portability_h
  #define	portability_h
  
  /*
   * Helpers for portability between Windows and UN*X and between different
   * flavors of UN*X.
   */
  
  #include "pcap/funcattrs.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #ifndef HAVE_STRLCPY
   /*
    * Macro that does the same thing as strlcpy().
    */
   #if defined(_MSC_VER) || defined(__MINGW32__)
    /*
     * strncpy_s() is supported at least back to Visual
     * Studio 2005.
     */
    #define strlcpy(x, y, z) \
  	strncpy_s((x), (z), (y), _TRUNCATE)
  
   #else
    #define strlcpy(x, y, z) \
  	(strncpy((x), (y), (z)), \
  	 ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \
  	 (void) strlen((y)))
   #endif
  #endif
  
  #ifndef HAVE_STRLCAT
   /*
    * Macro that does the same thing as strlcat().
    */
   #if defined(_MSC_VER) || defined(__MINGW32__)
    /*
     * strncat_s() is supported at least back to Visual
     * Studio 2005.
     */
    #define strlcat(x, y, z) \
  	strncat_s((x), (z), (y), _TRUNCATE)
   #else
    /*
     * ANSI C says strncat() always null-terminates its first argument,
     * so 1) we don't need to explicitly null-terminate the string
     * ourselves and 2) we need to leave room for the null terminator.
     */
    #define strlcat(x, y, z) \
  	strncat((x), (y), (z) - strlen((x)) - 1)
   #endif
  #endif
  
  #ifdef _MSC_VER
    /*
     * If <crtdbg.h> has been included, and _DEBUG is defined, and
     * __STDC__ is zero, <crtdbg.h> will define strdup() to call
     * _strdup_dbg().  So if it's already defined, don't redefine
     * it.
     */
    #ifndef strdup
    #define strdup	_strdup
    #endif
  #endif
  
  /*
   * On Windows, snprintf(), with that name and with C99 behavior - i.e.,
   * guaranteeing that the formatted string is null-terminated - didn't
   * appear until Visual Studio 2015.  Prior to that, the C runtime had
   * only _snprintf(), which *doesn't* guarantee that the string is
   * null-terminated if it is truncated due to the buffer being too
   * small.  We therefore can't just define snprintf to be _snprintf
   * and define vsnprintf to be _vsnprintf, as we're relying on null-
   * termination of strings in all cases.
   *
   * We also want to allow this to be built with versions of Visual Studio
   * prior to VS 2015, so we can't rely on snprintf() being present.
   *
   * And we want to make sure that, if we support plugins in the future,
   * a routine with C99 snprintf() behavior will be available to them.
   * We also don't want it to collide with the C library snprintf() if
   * there is one.
   *
   * So we make pcap_snprintf() and pcap_vsnprintf() available, either by
   * #defining them to be snprintf or vsnprintf, respectively, or by
   * defining our own versions and exporting them.
   */
  #ifdef HAVE_SNPRINTF
  #define pcap_snprintf snprintf
  #else
  extern int pcap_snprintf(char *, size_t, PCAP_FORMAT_STRING(const char *), ...)
      PCAP_PRINTFLIKE(3, 4);
  #endif
  
  #ifdef HAVE_VSNPRINTF
  #define pcap_vsnprintf vsnprintf
  #else
  extern int pcap_vsnprintf(char *, size_t, const char *, va_list ap);
  #endif
  
  #ifdef HAVE_STRTOK_R
    #define pcap_strtok_r	strtok_r
  #else
    #ifdef _WIN32
      /*
       * Microsoft gives it a different name.
       */
      #define pcap_strtok_r	strtok_s
    #else
      /*
       * Define it ourselves.
       */
      #define NEED_STRTOK_R
      extern char *pcap_strtok_r(char *, const char *, char **);
    #endif
  #endif /* HAVE_STRTOK_R */
  
  #ifdef _WIN32
    #if !defined(__cplusplus)
      #define inline __inline
    #endif
  #endif /* _WIN32 */
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif