gnu/dist/groff/src/libs/libgroff/maxpathname.cpp

   1 /*      $NetBSD$        */
   2
   3 // -*- C++ -*-
   4 /* Copyright (C) 2005 Free Software Foundation, Inc.
   5      Written by Werner Lemberg (wl@gnu.org)
   6
   7 This file is part of groff.
   8
   9 groff is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License along
  20 with groff; see the file COPYING.  If not, write to the Free Software
  21 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  22
  23 /* path_name_max(dir) does the same as pathconf(dir, _PC_PATH_MAX) */
  24
  25 #include "lib.h"
  26
  27 #include <sys/types.h>
  28
  29 #ifdef HAVE_UNISTD_H
  30 #include <unistd.h>
  31 #endif /* HAVE_UNISTD_H */
  32
  33 #ifdef _POSIX_VERSION
  34
  35 size_t path_name_max()
  36 {
  37   return pathconf("/", _PC_PATH_MAX) < 1 ? 1024 : pathconf("/",_PC_PATH_MAX);
  38 }
  39
  40 #else /* not _POSIX_VERSION */
  41
  42 #include <stdlib.h>
  43
  44 #ifdef HAVE_DIRENT_H
  45 # include <dirent.h>
  46 #else /* not HAVE_DIRENT_H */
  47 # ifdef HAVE_SYS_DIR_H
  48 #  include <sys/dir.h>
  49 # endif /* HAVE_SYS_DIR_H */
  50 #endif /* not HAVE_DIRENT_H */
  51
  52 #ifndef PATH_MAX
  53 # ifdef MAXPATHLEN
  54 #  define PATH_MAX MAXPATHLEN
  55 # else /* !MAXPATHLEN */
  56 #  ifdef MAX_PATH
  57 #   define PATH_MAX MAX_PATH
  58 #  else /* !MAX_PATH */
  59 #   ifdef _MAX_PATH
  60 #    define PATH_MAX _MAX_PATH
  61 #   else /* !_MAX_PATH */
  62 #    define PATH_MAX 255
  63 #   endif /* !_MAX_PATH */
  64 #  endif /* !MAX_PATH */
  65 # endif /* !MAXPATHLEN */
  66 #endif /* !PATH_MAX */
  67
  68 size_t path_name_max()
  69 {
  70   return PATH_MAX;
  71 }
  72
  73 #endif /* not _POSIX_VERSION */