1 files changed, 138 insertions, 0 deletions
diff --git a/StdLib/PosixLib/Gen/readdir.c b/StdLib/PosixLib/Gen/readdir.c
new file mode 100644
index 0000000000..b8ad0af2a3
--- /dev/null
+++ b/StdLib/PosixLib/Gen/readdir.c
@@ -0,0 +1,138 @@
+/** @file
+    Get next entry in a directory.
+
+    Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
+    This program and the accompanying materials
+    are licensed and made available under the terms and conditions of the BSD License
+    which accompanies this distribution.  The full text of the license may be found at
+    http://opensource.org/licenses/bsd-license.php
+
+    THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+    WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+    Copyright (c) 1983, 1993
+    The Regents of the University of California.  All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    3. Neither the name of the University nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+    NetBSD: readdir.c,v 1.24 2008/05/04 18:53:26 tonnerre Exp
+    readdir.c 8.3 (Berkeley) 9/29/94
+ */
+#include <sys/cdefs.h>
+
+#include  <namespace.h>
+#include  <reentrant.h>
+#include  <extern.h>
+#include <sys/param.h>
+#include  <sys/stdint.h>
+
+#include  <stdio.h>
+#include <dirent.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include  <sys/EfiSysCall.h>
+
+/*
+ * get next entry in a directory.
+ */
+struct dirent *
+_readdir_unlocked(DIR *dirp, int skipdeleted)
+{
+  struct dirent *dp;
+
+
+  for (;;) {
+    if (dirp->dd_loc >= dirp->dd_size) {
+      if (dirp->dd_flags & __DTF_READALL)
+        return (NULL);
+      dirp->dd_loc = 0;
+    }
+    if (dirp->dd_loc == 0 && !(dirp->dd_flags & __DTF_READALL)) {
+      dirp->dd_size = (long)read(dirp->dd_fd, dirp->dd_buf, (size_t)dirp->dd_len);
+      if (dirp->dd_size <= 0)
+        return (NULL);
+    }
+    dp = (struct dirent *) (void *)(dirp->dd_buf + (size_t)dirp->dd_loc);
+    if ((intptr_t)dp & _DIRENT_ALIGN(dp))/* bogus pointer check */
+      return (NULL);
+    dirp->dd_loc += (long)dp->Size;
+    if ((dp->Attribute & DT_HIDDEN) && (dirp->dd_flags & DTF_HIDEW))
+      continue;
+    return (dp);
+  }
+}
+
+struct dirent *
+readdir(DIR *dirp)
+{
+  struct dirent *dp;
+
+#ifdef _REENTRANT
+  if (__isthreaded) {
+    mutex_lock((mutex_t *)dirp->dd_lock);
+    dp = _readdir_unlocked(dirp, 1);
+    mutex_unlock((mutex_t *)dirp->dd_lock);
+  }
+  else
+#endif
+    dp = _readdir_unlocked(dirp, 1);
+  return (dp);
+}
+
+int
+readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result)
+{
+  struct dirent *dp;
+  int saved_errno;
+
+  saved_errno = errno;
+  errno = 0;
+#ifdef _REENTRANT
+  if (__isthreaded) {
+    mutex_lock((mutex_t *)dirp->dd_lock);
+    if ((dp = _readdir_unlocked(dirp, 1)) != NULL)
+      memcpy(entry, dp, (size_t)_DIRENT_SIZE(dp));
+    mutex_unlock((mutex_t *)dirp->dd_lock);
+  }
+  else
+#endif
+    if ((dp = _readdir_unlocked(dirp, 1)) != NULL)
+      memcpy(entry, dp, (size_t)_DIRENT_SIZE(dp));
+
+  if (errno != 0) {
+    if (dp == NULL)
+      return (errno);
+  } else
+    errno = saved_errno;
+
+  if (dp != NULL)
+    *result = entry;
+  else
+    *result = NULL;
+
+  return (0);
+}