lib/filename.h

   1 /* Basic filename support macros.
   2    Copyright (C) 2001-2004, 2007-2019 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #ifndef _FILENAME_H
  18 #define _FILENAME_H
  19
  20 #ifdef __cplusplus
  21 extern "C" {
  22 #endif
  23
  24
  25 /* Pathname support.
  26    ISSLASH(C)           tests whether C is a directory separator character.
  27    IS_ABSOLUTE_PATH(P)  tests whether P is an absolute path.  If it is not,
  28                         it may be concatenated to a directory pathname.
  29    IS_PATH_WITH_DIR(P)  tests whether P contains a directory specification.
  30  */
  31 #if defined _WIN32 || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
  32   /* Native Windows, Cygwin, OS/2, DOS */
  33 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
  34 # define HAS_DEVICE(P) \
  35     ((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \
  36      && (P)[1] == ':')
  37 # define IS_ABSOLUTE_PATH(P) (ISSLASH ((P)[0]) || HAS_DEVICE (P))
  38 # define IS_PATH_WITH_DIR(P) \
  39     (strchr (P, '/') != NULL || strchr (P, '\\') != NULL || HAS_DEVICE (P))
  40 # define FILE_SYSTEM_PREFIX_LEN(P) (HAS_DEVICE (P) ? 2 : 0)
  41 #else
  42   /* Unix */
  43 # define ISSLASH(C) ((C) == '/')
  44 # define IS_ABSOLUTE_PATH(P) ISSLASH ((P)[0])
  45 # define IS_PATH_WITH_DIR(P) (strchr (P, '/') != NULL)
  46 # define FILE_SYSTEM_PREFIX_LEN(P) 0
  47 #endif
  48
  49
  50 #ifdef __cplusplus
  51 }
  52 #endif
  53
  54 #endif /* _FILENAME_H */