/* dirname.c -- return all but the last element in a path
- Copyright (C) 1990 Free Software Foundation, Inc.
+ Copyright (C) 1990, 1998, 2000 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-#ifdef HAVE_CONFIG_H
-#include <config.h>
+#if HAVE_CONFIG_H
+# include <config.h>
#endif
#ifdef STDC_HEADERS
-#include <stdlib.h>
+# include <stdlib.h>
#else
char *malloc ();
#endif
-#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
-#include <string.h>
+#if defined STDC_HEADERS || defined HAVE_STRING_H
+# include <string.h>
#else
-#include <strings.h>
-#ifndef strrchr
-#define strrchr rindex
+# include <strings.h>
+# ifndef strrchr
+# define strrchr rindex
+# endif
#endif
+#include <assert.h>
+
+#include "dirname.h"
+
+#ifndef ISSLASH
+# define ISSLASH(C) ((C) == '/')
#endif
+#define BACKSLASH_IS_PATH_SEPARATOR ISSLASH ('\\')
+
/* Return the leading directories part of PATH,
allocated with malloc. If out of memory, return 0.
Assumes that trailing slashes have already been
removed. */
char *
-dirname (path)
- char *path;
+dir_name (const char *path)
{
char *newpath;
char *slash;
int length; /* Length of result, not including NUL. */
slash = strrchr (path, '/');
+ if (BACKSLASH_IS_PATH_SEPARATOR)
+ {
+ char *b = strrchr (path, '\\');
+ if (b && slash < b)
+ slash = b;
+ }
+
+ /* Make sure there are no trailing slashes. */
+ assert (slash == NULL /* There are no slashes in PATH. */
+ || slash[1] != 0 /* There is a non-NUL byte after the last slash. */
+ || path == slash /* PATH is just `/'. */
+ );
+
if (slash == 0)
{
/* File is in the current directory. */
else
{
/* Remove any trailing slashes from the result. */
- while (slash > path && *slash == '/')
- --slash;
+ if (BACKSLASH_IS_PATH_SEPARATOR)
+ {
+ const char *lim = ((path[0] >= 'A' && path[0] <= 'z'
+ && path[1] == ':')
+ ? path + 2 : path);
+
+ /* If canonicalized "d:/path", leave alone the root case "d:/". */
+ while (slash > lim && ISSLASH (*slash))
+ --slash;
+ }
+ else
+ {
+ while (slash > path && ISSLASH (*slash))
+ --slash;
+ }
length = slash - path + 1;
}
+
newpath = (char *) malloc (length + 1);
if (newpath == 0)
return 0;