maxfilename.cpp revision 302408 
175592Sru// -*- C++ -*-
275592Sru/* Copyright (C) 1992, 2001, 2003, 2005 Free Software Foundation, Inc.
3139103Sru     Written by James Clark (jjc@jclark.com)
475592Sru
575592SruThis file is part of groff.
675592Sru
775592Srugroff is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
11
12groff is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License along
18with groff; see the file COPYING.  If not, write to the Free Software
19Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21/* file_name_max(dir) does the same as pathconf(dir, _PC_NAME_MAX) */
22
23#include "lib.h"
24
25#include <sys/types.h>
26
27#ifdef HAVE_UNISTD_H
28#include <unistd.h>
29#endif /* HAVE_UNISTD_H */
30
31#ifdef _POSIX_VERSION
32
33size_t file_name_max(const char *fname)
34{
35  return pathconf(fname, _PC_NAME_MAX);
36}
37
38#else /* not _POSIX_VERSION */
39
40#ifdef HAVE_DIRENT_H
41#include <dirent.h>
42#else /* not HAVE_DIRENT_H */
43#ifdef HAVE_SYS_DIR_H
44#include <sys/dir.h>
45#endif /* HAVE_SYS_DIR_H */
46#endif /* not HAVE_DIRENT_H */
47
48#ifndef NAME_MAX
49#ifdef MAXNAMLEN
50#define NAME_MAX MAXNAMLEN
51#else /* !MAXNAMLEN */
52#ifdef MAXNAMELEN
53#define NAME_MAX MAXNAMELEN
54#else /* !MAXNAMELEN */
55#define NAME_MAX 14
56#endif /* !MAXNAMELEN */
57#endif /* !MAXNAMLEN */
58#endif /* !NAME_MAX */
59
60size_t file_name_max(const char *)
61{
62  return NAME_MAX;
63}
64
65#endif /* not _POSIX_VERSION */
66