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/* basename.c -- return the last element in a path */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#ifndef FILESYSTEM_PREFIX_LEN
# define FILESYSTEM_PREFIX_LEN(f) 0
#endif
#ifndef ISSLASH
# define ISSLASH(c) ((c) == '/')
#endif
/* In general, we can't use the builtin `basename' function if available,
since it has different meanings in different environments.
In some environments the builtin `basename' modifies its argument. */
char *
base_name (name)
char const *name;
{
char const *base = name += FILESYSTEM_PREFIX_LEN (name);
for (; *name; name++)
if (ISSLASH (*name))
base = name + 1;
return (char *) base;
}
#ifdef STDC_HEADERS
# include <stdlib.h>
#else
char *malloc ();
#endif
char *
base_name_strip_trailing_slashes (name)
char const *name;
{
char const *end_p = name += FILESYSTEM_PREFIX_LEN (name);
char const *first, *p;
char *base;
int length;
/* Make END_P point to the byte after the last non-slash character
in NAME if one exists. */
for (p = name; *p; p++)
if (!ISSLASH (*p))
end_p = p + 1;
if (end_p == name)
{
first = end_p;
}
else
{
first = end_p - 1;
while (first > name && !ISSLASH (*(first - 1)))
--first;
}
length = end_p - first;
base = (char *) malloc (length + 1);
if (base == 0)
return 0;
memcpy (base, first, length);
base[length] = '\0';
return base;
}
#ifdef TEST
# include <assert.h>
# include <stdlib.h>
# define CHECK(a,b) assert (strcmp (base_name_strip_trailing_slashes(a), b) \
== 0)
int
main ()
{
CHECK ("a", "a");
CHECK ("ab", "ab");
CHECK ("ab/c", "c");
CHECK ("/ab/c", "c");
CHECK ("/ab/c/", "c");
CHECK ("/ab/c////", "c");
CHECK ("/", "");
CHECK ("////", "");
CHECK ("////a", "a");
CHECK ("//a//", "a");
CHECK ("/a", "a");
exit (0);
}
#endif
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