summaryrefslogtreecommitdiff
path: root/m4/dos.m4
blob: 868626e7e5942cd5e0ca34530546fea0e3ca38f5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
#serial 5

# Define some macros required for proper operation of code in lib/*.c
# on MSDOS/Windows systems.

# From Jim Meyering.

AC_DEFUN([jm_AC_DOS],
  [
    AC_CACHE_CHECK([whether system is Windows or MSDOS], [ac_cv_win_or_dos],
      [
        AC_TRY_COMPILE([],
        [#if !defined _WIN32 && !defined __WIN32__ && !defined __MSDOS__
neither MSDOS nor Windows
#endif],
        [ac_cv_win_or_dos=yes],
        [ac_cv_win_or_dos=no])
      ])

    if test x"$ac_cv_win_or_dos" = xyes; then
      ac_fs_accepts_drive_letter_prefix=1
      ac_fs_backslash_is_file_name_separator=1
    else
      ac_fs_accepts_drive_letter_prefix=0
      ac_fs_backslash_is_file_name_separator=0
    fi

    AH_VERBATIM(FILESYSTEM_PREFIX_LEN,
    [#if FILESYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX
# define FILESYSTEM_PREFIX_LEN(Filename) \
  ((Filename)[0] && (Filename)[1] == ':' ? 2 : 0)
#else
# define FILESYSTEM_PREFIX_LEN(Filename) 0
#endif])

    AC_DEFINE_UNQUOTED([FILESYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX],
      $ac_fs_accepts_drive_letter_prefix,
      [Define on systems for which file names may have a so-called
       `drive letter' prefix, define this to compute the length of that
       prefix, including the colon.])

    AH_VERBATIM(ISSLASH,
    [#if FILESYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR
# define ISSLASH(C) ((C) == '/' || (C) == '\\')
#else
# define ISSLASH(C) ((C) == '/')
#endif])

    AC_DEFINE_UNQUOTED([FILESYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR],
      $ac_fs_backslash_is_file_name_separator,
      [Define if the backslash character may also serve as a file name
       component separator.])
  ])