X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fdirname.c;h=94f1a36a1afc3b35246b427251b96f171a3d278b;hb=1276a2c5f24c0c932426aca9c899fa524d2443f2;hp=7826d8edbfeaa0e049bb8b4a931ec10df57bf696;hpb=3334a9952b11ec3cc0fcc729c67dc5fcbcc981c7;p=gnulib.git

diff --git a/lib/dirname.c b/lib/dirname.c
index 7826d8edb..94f1a36a1 100644
--- a/lib/dirname.c
+++ b/lib/dirname.c
@@ -1,10 +1,12 @@
-/* dirname.c -- return all but the last element in a path
-   Copyright (C) 1990, 1998, 2000 Free Software Foundation, Inc.
+/* dirname.c -- return all but the last element in a file name
 
-   This program is free software; you can redistribute it and/or modify
+   Copyright (C) 1990, 1998, 2000-2001, 2003-2006, 2009-2014 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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,178 +14,25 @@
    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
-
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#ifdef STDC_HEADERS
-# include <stdlib.h>
-#else
-char *malloc ();
-#endif
-#if defined STDC_HEADERS || defined HAVE_STRING_H
-# include <string.h>
-#else
-# include <strings.h>
-# ifndef strrchr
-#  define strrchr rindex
-# endif
-#endif
-#include <assert.h>
-
-#ifndef HAVE_DECL_MEMRCHR
-"this configure-time declaration test was not run"
-#endif
-#if !HAVE_DECL_MEMRCHR
-void *memrchr ();
-#endif
+#include <config.h>
 
 #include "dirname.h"
 
-#ifndef FILESYSTEM_PREFIX_LEN
-# define FILESYSTEM_PREFIX_LEN(Filename) 0
-#endif
-
-#ifndef ISSLASH
-# define ISSLASH(C) ((C) == '/')
-#endif
-
-#define BACKSLASH_IS_PATH_SEPARATOR ISSLASH ('\\')
-
-/* Return the length of `dirname (PATH)' and set *RESULT to point
-   to PATH or to `"."', as appropriate.  Works properly even if
-   there are trailing slashes (by effectively ignoring them).
-   WARNING: This function doesn't work for cwd-relative names like
-   `a:foo' that are specified with a drive-letter prefix.  That case
-   is handled in the caller.  */
-static size_t
-dir_name_r (char const *path, char const **result)
-{
-  char const *slash;
-  size_t length;		/* Length of result, not including NUL.  */
-
-  slash = strrchr (path, '/');
-  if (BACKSLASH_IS_PATH_SEPARATOR)
-    {
-      char const *b = strrchr (path, '\\');
-      if (b && slash < b)
-	slash = b;
-    }
-
-  /* If the last byte of PATH is a slash, decrement SLASH until it's
-     pointing at the leftmost in a sequence of trailing slashes.  */
-  if (slash && slash[1] == 0)
-    {
-      while (path < slash && ISSLASH (slash[-1]))
-	{
-	  --slash;
-	}
-
-      if (path < slash)
-	{
-	  size_t len = slash - path;
-	  slash = memrchr (path, '/', len);
-	  if (BACKSLASH_IS_PATH_SEPARATOR)
-	    {
-	      char const *b = memrchr (path, '\\', len);
-	      if (b && slash < b)
-		slash = b;
-	    }
-	}
-    }
-
-  if (slash == 0)
-    {
-      /* File is in the current directory.  */
-
-      length = FILESYSTEM_PREFIX_LEN (path);
-
-      if (length == 0)
-	{
-	  path = ".";
-	  length = 1;
-	}
-    }
-  else
-    {
-      /* Remove any trailing slashes from the result.  If we have a
-	 canonicalized "d:/path", leave alone the root case "d:/".  */
-      char const *lim = path + FILESYSTEM_PREFIX_LEN (path);
-
-      while (slash > lim && ISSLASH (*slash))
-	--slash;
+#include <stdlib.h>
+#include <string.h>
+#include "xalloc.h"
 
-      length = slash - path + 1;
-    }
-
-  *result = path;
-  return length;
-}
-
-/* Return the leading directories part of PATH,
-   allocated with malloc.  If out of memory, return 0.
-   Works properly even if there are trailing slashes
-   (by effectively ignoring them).  */
+/* Just like mdir_name (dirname-lgpl.c), except, rather than
+   returning NULL upon malloc failure, here, we report the
+   "memory exhausted" condition and exit.  */
 
 char *
-dir_name (char const *path)
+dir_name (char const *file)
 {
-  char const *result;
-  size_t length = dir_name_r (path, &result);
-  int append_dot = (length && length == FILESYSTEM_PREFIX_LEN (newpath));
-  char *newpath = (char *) malloc (length + append_dot + 1);
-  if (newpath == 0)
-    return 0;
-  strncpy (newpath, result, length);
-  /* If PATH is "d:foo", return "d:.", the CWD on drive d:  */
-  if (append_dot)
-    newpath[length++] = '.';
-  newpath[length] = 0;
-  return newpath;
-}
-
-#ifdef TEST_DIRNAME
-/*
-
-Run the test like this (expect no output):
-  gcc -DHAVE_CONFIG_H -DTEST_DIRNAME -I.. -O -Wall memrchr.c dirname.c
-  sed -n '/^BEGIN-DATA$/,/^END-DATA$/p' dirname.c|grep -v DATA|./a.out
-
-BEGIN-DATA
-foo//// .
-bar/foo//// bar
-foo/ .
-/ /
-. .
-a .
-END-DATA
-
-*/
-
-# define MAX_BUFF_LEN 1024
-# include <stdio.h>
-# include <stdlib.h>
-
-int
-main ()
-{
-  char buff[MAX_BUFF_LEN + 1];
-
-  buff[MAX_BUFF_LEN] = 0;
-  while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
-    {
-      char path[MAX_BUFF_LEN];
-      char expected_result[MAX_BUFF_LEN];
-      char const *result;
-      sscanf (buff, "%s %s", path, expected_result);
-      result = dir_name (path);
-      if (strcmp (result, expected_result))
-	printf ("%s: got %s, expected %s\n", path, result, expected_result);
-    }
-  exit (0);
-
+  char *result = mdir_name (file);
+  if (!result)
+    xalloc_die ();
+  return result;
 }
-#endif