xapian-core/common/safesysstat.h

   1 /** @file safesysstat.h
   2  * @brief #include <sys/stat.h>, but enabling large file support.
   3  */
   4 /* Copyright (C) 2007,2012 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
  19  * USA
  20  */
  21
  22 #ifndef XAPIAN_INCLUDED_SAFESYSSTAT_H
  23 #define XAPIAN_INCLUDED_SAFESYSSTAT_H
  24
  25 #include <sys/stat.h>
  26
  27 // For most platforms, AC_SYS_LARGEFILE enables support for large files at
  28 // configure time, but MSVC doesn't use configure so we have to put the
  29 // magic somewhere else - i.e. here!
  30
  31 #ifdef _MSC_VER
  32 // MSVC needs to call _stati64() instead of stat() and the struct which holds
  33 // the information is "struct _stati64" instead of "struct stat" so we just
  34 // use #define to replace both in one go.  We also want to use _fstati64()
  35 // instead of fstat() but in this case we can use a function-like macro.
  36 //
  37 // This hack is a problem is we ever want a method called "stat", or one called
  38 // fstat which takes 2 parameters, but we can probably live with these
  39 // limitations.
  40
  41 #ifdef stat
  42 # undef stat
  43 #endif
  44
  45 #ifdef fstat
  46 # undef fstat
  47 #endif
  48
  49 // NB: _stati64 not _stat64 (the latter just returns a 64 bit timestamp).
  50 #define stat _stati64
  51 #define fstat(FD, BUF) _fstati64(FD,BUF)
  52
  53 #endif
  54
  55 #ifdef __WIN32__
  56
  57 // MSVC lacks these POSIX macros and other compilers may too:
  58 #ifndef S_ISDIR
  59 # define S_ISDIR(ST_MODE) (((ST_MODE) & _S_IFMT) == _S_IFDIR)
  60 #endif
  61 #ifndef S_ISREG
  62 # define S_ISREG(ST_MODE) (((ST_MODE) & _S_IFMT) == _S_IFREG)
  63 #endif
  64
  65 // On UNIX, mkdir() is prototyped in <sys/stat.h> but on Windows it's in
  66 // <direct.h>, so just include that from here to avoid build failures on
  67 // MSVC just because of some new use of mkdir().  This also reduces the
  68 // number of conditionalised #include statements we need in the sources.
  69 #include <direct.h>
  70
  71 // Add overloaded version of mkdir which takes an (ignored) mode argument
  72 // to allow source code to just specify a mode argument unconditionally.
  73 //
  74 // The () around mkdir are in case it's defined as a macro.
  75 inline int (mkdir)(const char *pathname, mode_t /*mode*/) {
  76     return _mkdir(pathname);
  77 }
  78
  79 #else
  80
  81 // These were specified by POSIX.1-1996, so most platforms should have
  82 // these by now:
  83 #ifndef S_ISDIR
  84 # define S_ISDIR(ST_MODE) (((ST_MODE) & S_IFMT) == S_IFDIR)
  85 #endif
  86 #ifndef S_ISREG
  87 # define S_ISREG(ST_MODE) (((ST_MODE) & S_IFMT) == S_IFREG)
  88 #endif
  89
  90 #endif
  91
  92 #endif /* XAPIAN_INCLUDED_SAFESYSSTAT_H */