checkpoint

1 files changed, 85 insertions, 0 deletions

diff --git a/lib/dir.c b/lib/dir.c
new file mode 100644
index 0000000..1ca64ae
--- /dev/null
+++ b/lib/dir.c
@@ -0,0 +1,85 @@
+/* dir.c: directory operations.
+
+Copyright (C) 1992, 93, 94, 95, 2004 Free Software Foundation, Inc.
+
+This 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.
+
+This 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 this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "config.h"
+
+#include <kpathsea/c-dir.h>
+#include <kpathsea/c-stat.h>
+#include <kpathsea/hash.h>
+
+
+/* Return true if FN is a directory or a symlink to a directory,
+   false if not. */
+
+boolean
+dir_p P1C(const_string, fn)
+{
+  struct stat stats;
+  return stat (fn, &stats) == 0 && S_ISDIR (stats.st_mode);
+}
+
+
+/* Return -1 if FN isn't a directory, else its number of links.
+   Duplicate the call to stat; no need to incur overhead of a function
+   call for that little bit of cleanliness. */
+
+int
+dir_links P1C(const_string, fn)
+{
+  static hash_table_type link_table;
+  string *hash_ret;
+  long ret;
+  
+  if (link_table.size == 0)
+    link_table = hash_create (457);
+
+#ifdef KPSE_DEBUG
+  /* This is annoying, but since we're storing integers as pointers, we
+     can't print them as strings.  */
+  if (KPSE_DEBUG_P (KPSE_DEBUG_HASH))
+    kpse_debug_hash_lookup_int = true;
+#endif
+
+  hash_ret = hash_lookup (link_table, fn);
+  
+#ifdef KPSE_DEBUG
+  if (KPSE_DEBUG_P (KPSE_DEBUG_HASH))
+    kpse_debug_hash_lookup_int = false;
+#endif
+
+  /* Have to cast the int we need to/from the const_string that the hash
+     table stores for values. Let's hope an int fits in a pointer.  */
+  if (hash_ret)
+    ret = (long) *hash_ret;
+  else
+    {
+      struct stat stats;
+      ret = stat (fn, &stats) == 0 && S_ISDIR (stats.st_mode)
+            ? stats.st_nlink : -1;
+
+      /* It's up to us to copy the value.  */
+      hash_insert (&link_table, xstrdup (fn), (const_string) ret);
+      
+#ifdef KPSE_DEBUG
+      if (KPSE_DEBUG_P (KPSE_DEBUG_STAT))
+        DEBUGF2 ("dir_links(%s) => %ld\n", fn, ret);
+#endif
+    }
+
+  return ret;
+}