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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
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