1 | /* Libiberty basename. Like basename, but is not overridden by the |
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2 | system C library. |
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3 | Copyright (C) 2001 Free Software Foundation, Inc. |
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4 | |
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5 | This file is part of the libiberty library. |
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6 | Libiberty is free software; you can redistribute it and/or |
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7 | modify it under the terms of the GNU Library General Public |
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8 | License as published by the Free Software Foundation; either |
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9 | version 2 of the License, or (at your option) any later version. |
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10 | |
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11 | Libiberty is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | Library General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU Library General Public |
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17 | License along with libiberty; see the file COPYING.LIB. If |
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18 | not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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19 | Boston, MA 02111-1307, USA. */ |
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20 | |
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21 | /* |
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22 | |
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23 | @deftypefn Replacement {const char*} lbasename (const char *@var{name}) |
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24 | |
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25 | Given a pointer to a string containing a typical pathname |
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26 | (@samp{/usr/src/cmd/ls/ls.c} for example), returns a pointer to the |
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27 | last component of the pathname (@samp{ls.c} in this case). The |
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28 | returned pointer is guaranteed to lie within the original |
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29 | string. This latter fact is not true of many vendor C |
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30 | libraries, which return special strings or modify the passed |
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31 | strings for particular input. |
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32 | |
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33 | In particular, the empty string returns the same empty string, |
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34 | and a path ending in @code{/} returns the empty string after it. |
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35 | |
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36 | @end deftypefn |
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37 | |
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38 | */ |
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39 | |
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40 | #include "ansidecl.h" |
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41 | #include "libiberty.h" |
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42 | #include "safe-ctype.h" |
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43 | |
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44 | #ifndef DIR_SEPARATOR |
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45 | # define DIR_SEPARATOR '/' |
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46 | #endif |
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47 | |
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48 | #if defined (_WIN32) || defined (__MSDOS__) \ |
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49 | || defined (__DJGPP__) || defined (__OS2__) |
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50 | # define HAVE_DOS_BASED_FILE_SYSTEM |
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51 | # ifndef DIR_SEPARATOR_2 |
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52 | # define DIR_SEPARATOR_2 '\\' |
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53 | # endif |
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54 | #endif |
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55 | |
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56 | /* Define IS_DIR_SEPARATOR. VMS uses '::', ':', '[...]' and '<...>' to |
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57 | separate the different components of a file specification. It's a |
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58 | bit of a stretch to call ':', ']' and '>' directory separators, so |
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59 | just define the test to find the file name component. */ |
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60 | #ifdef VMS |
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61 | # define IS_DIR_SEPARATOR(ch) ((ch) == ':' || (ch) == ']' || (ch) == '>') |
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62 | #else |
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63 | # ifndef DIR_SEPARATOR_2 |
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64 | # define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR) |
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65 | # else |
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66 | # define IS_DIR_SEPARATOR(ch) \ |
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67 | (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2)) |
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68 | # endif |
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69 | #endif |
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70 | |
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71 | const char * |
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72 | lbasename (name) |
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73 | const char *name; |
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74 | { |
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75 | const char *base; |
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76 | |
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77 | #if defined (HAVE_DOS_BASED_FILE_SYSTEM) |
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78 | /* Skip over a possible disk name. */ |
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79 | if (ISALPHA (name[0]) && name[1] == ':') |
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80 | name += 2; |
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81 | #endif |
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82 | |
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83 | for (base = name; *name; name++) |
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84 | if (IS_DIR_SEPARATOR (*name)) |
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85 | base = name + 1; |
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86 | |
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87 | return base; |
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88 | } |
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