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272
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1 /* Take file names apart into directory and base names.
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2
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3 Copyright (C) 1998, 2001, 2003-2006 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 #ifndef DIRNAME_H_
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19 # define DIRNAME_H_ 1
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20
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21 # include <stdbool.h>
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22 # include <stddef.h>
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23
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24 # ifndef DIRECTORY_SEPARATOR
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25 # define DIRECTORY_SEPARATOR '/'
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26 # endif
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27
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28 # ifndef ISSLASH
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29 # define ISSLASH(C) ((C) == DIRECTORY_SEPARATOR)
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30 # endif
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31
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32 # ifndef FILE_SYSTEM_PREFIX_LEN
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33 # if FILE_SYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX
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34 /* This internal macro assumes ASCII, but all hosts that support drive
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35 letters use ASCII. */
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36 # define _IS_DRIVE_LETTER(c) (((unsigned int) (c) | ('a' - 'A')) - 'a' \
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37 <= 'z' - 'a')
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38 # define FILE_SYSTEM_PREFIX_LEN(Filename) \
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39 (_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':' ? 2 : 0)
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40 # else
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41 # define FILE_SYSTEM_PREFIX_LEN(Filename) 0
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42 # endif
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43 # endif
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44
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45 # ifndef FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
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46 # define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
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47 # endif
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48
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49 # ifndef DOUBLE_SLASH_IS_DISTINCT_ROOT
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50 # define DOUBLE_SLASH_IS_DISTINCT_ROOT 0
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51 # endif
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52
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53 # if FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
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54 # define IS_ABSOLUTE_FILE_NAME(F) ISSLASH ((F)[FILE_SYSTEM_PREFIX_LEN (F)])
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55 # else
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56 # define IS_ABSOLUTE_FILE_NAME(F) \
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57 (ISSLASH ((F)[0]) || 0 < FILE_SYSTEM_PREFIX_LEN (F))
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58 # endif
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59 # define IS_RELATIVE_FILE_NAME(F) (! IS_ABSOLUTE_FILE_NAME (F))
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60
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61 char *base_name (char const *file);
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62 char *dir_name (char const *file);
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63 size_t base_len (char const *file);
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64 size_t dir_len (char const *file);
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65 char *last_component (char const *file);
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66
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67 bool strip_trailing_slashes (char *file);
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68
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69 #endif /* not DIRNAME_H_ */
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