1 files changed, 71 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/ind_block.c b/e2fsprogs/ext2fs/ind_block.c
new file mode 100644
index 000000000..c86a1c59a
--- /dev/null
+++ b/e2fsprogs/ext2fs/ind_block.c
@@ -0,0 +1,71 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * ind_block.c --- indirect block I/O routines
+ *
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ *      2001, 2002, 2003, 2004, 2005 by  Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf)
+{
+        errcode_t       retval;
+#if BB_BIG_ENDIAN
+        blk_t           *block_nr;
+        int             i;
+        int             limit = fs->blocksize >> 2;
+#endif
+
+        if ((fs->flags & EXT2_FLAG_IMAGE_FILE) &&
+            (fs->io != fs->image_io))
+                memset(buf, 0, fs->blocksize);
+        else {
+                retval = io_channel_read_blk(fs->io, blk, 1, buf);
+                if (retval)
+                        return retval;
+        }
+#if BB_BIG_ENDIAN
+        if (fs->flags & (EXT2_FLAG_SWAP_BYTES | EXT2_FLAG_SWAP_BYTES_READ)) {
+                block_nr = (blk_t *) buf;
+                for (i = 0; i < limit; i++, block_nr++)
+                        *block_nr = ext2fs_swab32(*block_nr);
+        }
+#endif
+        return 0;
+}
+
+errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf)
+{
+#if BB_BIG_ENDIAN
+        blk_t           *block_nr;
+        int             i;
+        int             limit = fs->blocksize >> 2;
+#endif
+
+        if (fs->flags & EXT2_FLAG_IMAGE_FILE)
+                return 0;
+
+#if BB_BIG_ENDIAN
+        if (fs->flags & (EXT2_FLAG_SWAP_BYTES | EXT2_FLAG_SWAP_BYTES_WRITE)) {
+                block_nr = (blk_t *) buf;
+                for (i = 0; i < limit; i++, block_nr++)
+                        *block_nr = ext2fs_swab32(*block_nr);
+        }
+#endif
+        return io_channel_write_blk(fs->io, blk, 1, buf);
+}
+
+