text: /* Macros for taking apart, interpreting and processing file names.
  
     These are here because some non-Posix (a.k.a. DOSish) systems have
     drive letter brain-damage at the beginning of an absolute file name,
     use forward- and back-slash in path names interchangeably, and
     some of them have case-insensitive file names.
  
     Copyright (C) 2000-2019 Free Software Foundation, Inc.
  
  This file is part of BFD, the Binary File Descriptor library.
  
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  
  #ifndef FILENAMES_H
  #define FILENAMES_H
  
  #include "hashtab.h" /* for hashval_t */
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #if defined(__MSDOS__) || defined(_WIN32) || defined(__OS2__) || defined (__CYGWIN__)
  #  ifndef HAVE_DOS_BASED_FILE_SYSTEM
  #    define HAVE_DOS_BASED_FILE_SYSTEM 1
  #  endif
  #  ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
  #    define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
  #  endif
  #  define HAS_DRIVE_SPEC(f) HAS_DOS_DRIVE_SPEC (f)
  #  define IS_DIR_SEPARATOR(c) IS_DOS_DIR_SEPARATOR (c)
  #  define IS_ABSOLUTE_PATH(f) IS_DOS_ABSOLUTE_PATH (f)
  #else /* not DOSish */
  #  if defined(__APPLE__)
  #    ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
  #      define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
  #    endif
  #  endif /* __APPLE__ */
  #  define HAS_DRIVE_SPEC(f) (0)
  #  define IS_DIR_SEPARATOR(c) IS_UNIX_DIR_SEPARATOR (c)
  #  define IS_ABSOLUTE_PATH(f) IS_UNIX_ABSOLUTE_PATH (f)
  #endif
  
  #define IS_DIR_SEPARATOR_1(dos_based, c)				\
    (((c) == '/')								\
     || (((c) == '\\') && (dos_based)))
  
  #define HAS_DRIVE_SPEC_1(dos_based, f)			\
    ((f)[0] && ((f)[1] == ':') && (dos_based))
  
  /* Remove the drive spec from F, assuming HAS_DRIVE_SPEC (f).
     The result is a pointer to the remainder of F.  */
  #define STRIP_DRIVE_SPEC(f)	((f) + 2)
  
  #define IS_DOS_DIR_SEPARATOR(c) IS_DIR_SEPARATOR_1 (1, c)
  #define IS_DOS_ABSOLUTE_PATH(f) IS_ABSOLUTE_PATH_1 (1, f)
  #define HAS_DOS_DRIVE_SPEC(f) HAS_DRIVE_SPEC_1 (1, f)
  
  #define IS_UNIX_DIR_SEPARATOR(c) IS_DIR_SEPARATOR_1 (0, c)
  #define IS_UNIX_ABSOLUTE_PATH(f) IS_ABSOLUTE_PATH_1 (0, f)
  
  /* Note that when DOS_BASED is true, IS_ABSOLUTE_PATH accepts d:foo as
     well, although it is only semi-absolute.  This is because the users
     of IS_ABSOLUTE_PATH want to know whether to prepend the current
     working directory to a file name, which should not be done with a
     name like d:foo.  */
  #define IS_ABSOLUTE_PATH_1(dos_based, f)		 \
    (IS_DIR_SEPARATOR_1 (dos_based, (f)[0])		 \
     || HAS_DRIVE_SPEC_1 (dos_based, f))
  
  extern int filename_cmp (const char *s1, const char *s2);
  #define FILENAME_CMP(s1, s2)	filename_cmp(s1, s2)
  
  extern int filename_ncmp (const char *s1, const char *s2,
  			  size_t n);
  
  extern hashval_t filename_hash (const void *s);
  
  extern int filename_eq (const void *s1, const void *s2);
  
  extern int canonical_filename_eq (const char *a, const char *b);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* FILENAMES_H */
  