diff options
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/Makefile | 2 | ||||
| -rw-r--r-- | stdlib/xpg_basename.c | 69 |
2 files changed, 70 insertions, 1 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile index a9e22ac44b..7e70e5a1bb 100644 --- a/stdlib/Makefile +++ b/stdlib/Makefile @@ -42,7 +42,7 @@ routines := \ strtof strtod strtold \ system canonicalize \ a64l l64a \ - rpmatch strfmon strfmon_l getsubopt + rpmatch strfmon strfmon_l getsubopt xpg_basename distribute := exit.h grouping.h abort-instr.h tests := tst-strtol tst-strtod testmb testrand testsort testdiv \ diff --git a/stdlib/xpg_basename.c b/stdlib/xpg_basename.c new file mode 100644 index 0000000000..b789bc9a1a --- /dev/null +++ b/stdlib/xpg_basename.c @@ -0,0 +1,69 @@ +/* Return basename of given pathname according to the weird XPG specification. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <string.h> +#include <libgen.h> + + +char * +__xpg_basename (char *filename) +{ + char *p; + + if (filename == NULL || filename[0] == '\0') + /* We return a pointer to a static string containing ".". */ + p = (char *) "."; + else + { + p = strrchr (filename, '/'); + + if (p == NULL) + /* There is no slash in the filename. Return the whole string. */ + p = filename; + else + { + if (p[1] == '\0') + { + /* We must remove trailing '/'. */ + while (p > filename && p[-1] == '/') + --p; + + /* Now we can be in two situations: + a) the string only contains '/' characters, so we return + '/' + b) p points past the last component, but we have to remove + the trailing slash. */ + if (p > filename) + { + *p-- = '\0'; + while (p > filename && p[-1] != '/') + --p; + } + else + /* The last slash we already found is the right position + to return. */ + while (p[1] != '\0') + ++p; + } + } + } + + return p; +} |