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/* mischelp.h - Miscellaneous helper macros and functions
* Copyright (C) 1999, 2000, 2001, 2002, 2003,
* 2006, 2007, 2009 Free Software Foundation, Inc.
*
* This file is part of JNLIB.
*
* JNLIB is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* JNLIB is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBJNLIB_MISCHELP_H
#define LIBJNLIB_MISCHHELP_H
/* Check whether the files NAME1 and NAME2 are identical. This is for
example achieved by comparing the inode numbers of the files. */
int same_file_p (const char *name1, const char *name2);
#ifndef HAVE_TIMEGM
#include <time.h>
time_t timegm (struct tm *tm);
#endif /*!HAVE_TIMEGM*/
#define DIM(v) (sizeof(v)/sizeof((v)[0]))
#define DIMof(type,member) DIM(((type *)0)->member)
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5 )
# define JNLIB_GCC_M_FUNCTION 1
# define JNLIB_GCC_A_NR __attribute__ ((noreturn))
# define JNLIB_GCC_A_PRINTF( f, a ) __attribute__ ((format (printf,f,a)))
# define JNLIB_GCC_A_NR_PRINTF( f, a ) \
__attribute__ ((noreturn, format (printf,f,a)))
#else
# define JNLIB_GCC_A_NR
# define JNLIB_GCC_A_PRINTF( f, a )
# define JNLIB_GCC_A_NR_PRINTF( f, a )
#endif
/* To avoid that a compiler optimizes certain memset calls away, these
macros may be used instead. */
#define wipememory2(_ptr,_set,_len) do { \
volatile char *_vptr=(volatile char *)(_ptr); \
size_t _vlen=(_len); \
while(_vlen) { *_vptr=(_set); _vptr++; _vlen--; } \
} while(0)
#define wipememory(_ptr,_len) wipememory2(_ptr,0,_len)
/* Include hacks which are mainly required for Slowaris. */
#ifdef JNLIB_NEED_AFLOCAL
#ifndef HAVE_W32_SYSTEM
# include <sys/socket.h>
# include <sys/un.h>
#else
# include <windows.h>
#endif
#ifndef PF_LOCAL
# ifdef PF_UNIX
# define PF_LOCAL PF_UNIX
# else
# define PF_LOCAL AF_UNIX
# endif
#endif /*PF_LOCAL*/
#ifndef AF_LOCAL
# define AF_LOCAL AF_UNIX
#endif /*AF_UNIX*/
/* We used to avoid this macro in GnuPG and inlined the AF_LOCAL name
length computation directly with the little twist of adding 1 extra
byte. It seems that this was needed once on an old HP/UX box and
there are also rumours that 4.3 Reno and DEC systems need it. This
one-off buglet did not harm any current system until it came to Mac
OS X where the kernel (as of May 2009) exhibited a strange bug: The
systems basically froze in the connect call if the passed name
contained an invalid directory part. Ignore the old Unices. */
#ifndef SUN_LEN
# define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
+ strlen ((ptr)->sun_path))
#endif /*SUN_LEN*/
#endif /*JNLIB_NEED_AFLOCAL*/
#endif /*LIBJNLIB_MISCHELP_H*/
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