maxfilename.cpp revision 114402 
1// -*- C++ -*-
2/* Copyright (C) 1992, 2001, 2003 Free Software Foundation, Inc.
3     Written by James Clark (jjc@jclark.com)
4
5This file is part of groff.
6
7groff 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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_CC_LIMITS_H
41#include <limits.h>
42#endif /* HAVE_CC_LIMITS_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 NAME_MAX
53#ifdef MAXNAMLEN
54#define NAME_MAX MAXNAMLEN
55#else /* !MAXNAMLEN */
56#ifdef MAXNAMELEN
57#define NAME_MAX MAXNAMELEN
58#else /* !MAXNAMELEN */
59#define NAME_MAX 14
60#endif /* !MAXNAMELEN */
61#endif /* !MAXNAMLEN */
62#endif /* !NAME_MAX */
63
64size_t file_name_max(const char *)
65{
66  return NAME_MAX;
67}
68
69#endif /* not _POSIX_VERSION */
70