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