include/filenames.h

   1 /* Macros for taking apart, interpreting and processing file names.
   2
   3    These are here because some non-Posix (a.k.a. DOSish) systems have
   4    drive letter brain-damage at the beginning of an absolute file name,
   5    use forward- and back-slash in path names interchangeably, and
   6    some of them have case-insensitive file names.
   7
   8    Copyright (C) 2000-2021 Free Software Foundation, Inc.
   9
  10 This file is part of BFD, the Binary File Descriptor library.
  11
  12 This program is free software; you can redistribute it and/or modify
  13 it under the terms of the GNU General Public License as published by
  14 the Free Software Foundation; either version 2 of the License, or
  15 (at your option) any later version.
  16
  17 This program is distributed in the hope that it will be useful,
  18 but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 GNU General Public License for more details.
  21
  22 You should have received a copy of the GNU General Public License
  23 along with this program; if not, write to the Free Software
  24 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  25
  26 #ifndef FILENAMES_H
  27 #define FILENAMES_H
  28
  29 #include "hashtab.h" /* for hashval_t */
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #if defined(__MSDOS__) || (defined(_WIN32) && ! defined(__CYGWIN__)) || \
  36     defined(__OS2__)
  37 #  ifndef HAVE_DOS_BASED_FILE_SYSTEM
  38 #    define HAVE_DOS_BASED_FILE_SYSTEM 1
  39 #  endif
  40 #  ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
  41 #    define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
  42 #  endif
  43 #  define HAS_DRIVE_SPEC(f) HAS_DOS_DRIVE_SPEC (f)
  44 #  define IS_DIR_SEPARATOR(c) IS_DOS_DIR_SEPARATOR (c)
  45 #  define IS_ABSOLUTE_PATH(f) IS_DOS_ABSOLUTE_PATH (f)
  46 #else /* not DOSish */
  47 #  if defined(__APPLE__)
  48 #    ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
  49 #      define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
  50 #    endif
  51 #  endif /* __APPLE__ */
  52 #  define HAS_DRIVE_SPEC(f) (0)
  53 #  define IS_DIR_SEPARATOR(c) IS_UNIX_DIR_SEPARATOR (c)
  54 #  define IS_ABSOLUTE_PATH(f) IS_UNIX_ABSOLUTE_PATH (f)
  55 #endif
  56
  57 #define IS_DIR_SEPARATOR_1(dos_based, c)                                \
  58   (((c) == '/')                                                         \
  59    || (((c) == '\\') && (dos_based)))
  60
  61 #define HAS_DRIVE_SPEC_1(dos_based, f)                  \
  62   ((f)[0] && ((f)[1] == ':') && (dos_based))
  63
  64 /* Remove the drive spec from F, assuming HAS_DRIVE_SPEC (f).
  65    The result is a pointer to the remainder of F.  */
  66 #define STRIP_DRIVE_SPEC(f)     ((f) + 2)
  67
  68 #define IS_DOS_DIR_SEPARATOR(c) IS_DIR_SEPARATOR_1 (1, c)
  69 #define IS_DOS_ABSOLUTE_PATH(f) IS_ABSOLUTE_PATH_1 (1, f)
  70 #define HAS_DOS_DRIVE_SPEC(f) HAS_DRIVE_SPEC_1 (1, f)
  71
  72 #define IS_UNIX_DIR_SEPARATOR(c) IS_DIR_SEPARATOR_1 (0, c)
  73 #define IS_UNIX_ABSOLUTE_PATH(f) IS_ABSOLUTE_PATH_1 (0, f)
  74
  75 /* Note that when DOS_BASED is true, IS_ABSOLUTE_PATH accepts d:foo as
  76    well, although it is only semi-absolute.  This is because the users
  77    of IS_ABSOLUTE_PATH want to know whether to prepend the current
  78    working directory to a file name, which should not be done with a
  79    name like d:foo.  */
  80 #define IS_ABSOLUTE_PATH_1(dos_based, f)                 \
  81   (IS_DIR_SEPARATOR_1 (dos_based, (f)[0])                \
  82    || HAS_DRIVE_SPEC_1 (dos_based, f))
  83
  84 extern int filename_cmp (const char *s1, const char *s2);
  85 #define FILENAME_CMP(s1, s2)    filename_cmp(s1, s2)
  86
  87 extern int filename_ncmp (const char *s1, const char *s2,
  88                           size_t n);
  89
  90 extern hashval_t filename_hash (const void *s);
  91
  92 extern int filename_eq (const void *s1, const void *s2);
  93
  94 extern int canonical_filename_eq (const char *a, const char *b);
  95
  96 #ifdef __cplusplus
  97 }
  98 #endif
  99
 100 #endif /* FILENAMES_H */