Daily bump.
[official-gcc.git] / libiberty / lbasename.c
blobcea0253887b89a34690f76c65fa8be3f7e59a79f
1 /* Libiberty basename. Like basename, but is not overridden by the
2 system C library.
3 Copyright (C) 2001 Free Software Foundation, Inc.
5 This file is part of the libiberty library.
6 Libiberty is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
11 Libiberty is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with libiberty; see the file COPYING.LIB. If
18 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
23 @deftypefn Replacement {const char*} lbasename (const char *@var{name})
25 Given a pointer to a string containing a typical pathname
26 (@samp{/usr/src/cmd/ls/ls.c} for example), returns a pointer to the
27 last component of the pathname (@samp{ls.c} in this case). The
28 returned pointer is guaranteed to lie within the original
29 string. This latter fact is not true of many vendor C
30 libraries, which return special strings or modify the passed
31 strings for particular input.
33 In particular, the empty string returns the same empty string,
34 and a path ending in @code{/} returns the empty string after it.
36 @end deftypefn
40 #include "ansidecl.h"
41 #include "libiberty.h"
42 #include "safe-ctype.h"
44 #ifndef DIR_SEPARATOR
45 # define DIR_SEPARATOR '/'
46 #endif
48 #if defined (_WIN32) || defined (__MSDOS__) \
49 || defined (__DJGPP__) || defined (__OS2__)
50 # define HAVE_DOS_BASED_FILE_SYSTEM
51 # ifndef DIR_SEPARATOR_2
52 # define DIR_SEPARATOR_2 '\\'
53 # endif
54 #endif
56 /* Define IS_DIR_SEPARATOR. VMS uses '::', ':', '[...]' and '<...>' to
57 separate the different components of a file specification. It's a
58 bit of a stretch to call ':', ']' and '>' directory separators, so
59 just define the test to find the file name component. */
60 #ifdef VMS
61 # define IS_DIR_SEPARATOR(ch) ((ch) == ':' || (ch) == ']' || (ch) == '>')
62 #else
63 # ifndef DIR_SEPARATOR_2
64 # define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR)
65 # else
66 # define IS_DIR_SEPARATOR(ch) \
67 (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2))
68 # endif
69 #endif
71 const char *
72 lbasename (name)
73 const char *name;
75 const char *base;
77 #if defined (HAVE_DOS_BASED_FILE_SYSTEM)
78 /* Skip over a possible disk name. */
79 if (ISALPHA (name[0]) && name[1] == ':')
80 name += 2;
81 #endif
83 for (base = name; *name; name++)
84 if (IS_DIR_SEPARATOR (*name))
85 base = name + 1;
87 return base;