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) 2000-2017 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(__OS2__) || defined (__CYGWIN__)
  36 #  ifndef HAVE_DOS_BASED_FILE_SYSTEM
  37 #    define HAVE_DOS_BASED_FILE_SYSTEM 1
  38 #  endif
  39 #  ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
  40 #    define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
  41 #  endif
  42 #  define HAS_DRIVE_SPEC(f) HAS_DOS_DRIVE_SPEC (f)
  43 #  define IS_DIR_SEPARATOR(c) IS_DOS_DIR_SEPARATOR (c)
  44 #  define IS_ABSOLUTE_PATH(f) IS_DOS_ABSOLUTE_PATH (f)
  45 #else /* not DOSish */
  46 #  if defined(__APPLE__)
  47 #    ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
  48 #      define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
  49 #    endif
  50 #  endif /* __APPLE__ */
  51 #  define HAS_DRIVE_SPEC(f) (0)
  52 #  define IS_DIR_SEPARATOR(c) IS_UNIX_DIR_SEPARATOR (c)
  53 #  define IS_ABSOLUTE_PATH(f) IS_UNIX_ABSOLUTE_PATH (f)
  54 #endif
  55
  56 #define IS_DIR_SEPARATOR_1(dos_based, c)                                \
  57   (((c) == '/')                                                         \
  58    || (((c) == '\\') && (dos_based)))
  59
  60 #define HAS_DRIVE_SPEC_1(dos_based, f)                  \
  61   ((f)[0] && ((f)[1] == ':') && (dos_based))
  62
  63 /* Remove the drive spec from F, assuming HAS_DRIVE_SPEC (f).
  64    The result is a pointer to the remainder of F.  */
  65 #define STRIP_DRIVE_SPEC(f)     ((f) + 2)
  66
  67 #define IS_DOS_DIR_SEPARATOR(c) IS_DIR_SEPARATOR_1 (1, c)
  68 #define IS_DOS_ABSOLUTE_PATH(f) IS_ABSOLUTE_PATH_1 (1, f)
  69 #define HAS_DOS_DRIVE_SPEC(f) HAS_DRIVE_SPEC_1 (1, f)
  70
  71 #define IS_UNIX_DIR_SEPARATOR(c) IS_DIR_SEPARATOR_1 (0, c)
  72 #define IS_UNIX_ABSOLUTE_PATH(f) IS_ABSOLUTE_PATH_1 (0, f)
  73
  74 /* Note that when DOS_BASED is true, IS_ABSOLUTE_PATH accepts d:foo as
  75    well, although it is only semi-absolute.  This is because the users
  76    of IS_ABSOLUTE_PATH want to know whether to prepend the current
  77    working directory to a file name, which should not be done with a
  78    name like d:foo.  */
  79 #define IS_ABSOLUTE_PATH_1(dos_based, f)                 \
  80   (IS_DIR_SEPARATOR_1 (dos_based, (f)[0])                \
  81    || HAS_DRIVE_SPEC_1 (dos_based, f))
  82
  83 extern int filename_cmp (const char *s1, const char *s2);
  84 #define FILENAME_CMP(s1, s2)    filename_cmp(s1, s2)
  85
  86 extern int filename_ncmp (const char *s1, const char *s2,
  87                           size_t n);
  88
  89 extern hashval_t filename_hash (const void *s);
  90
  91 extern int filename_eq (const void *s1, const void *s2);
  92
  93 extern int canonical_filename_eq (const char *a, const char *b);
  94
  95 #ifdef __cplusplus
  96 }
  97 #endif
  98
  99 #endif /* FILENAMES_H */