import ext2fs lib to prep for new e2fsprogs

1 files changed, 66 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/ind_block.c b/e2fsprogs/ext2fs/ind_block.c
new file mode 100644
index 0000000..3519048
--- /dev/null
+++ b/e2fsprogs/ext2fs/ind_block.c
@@ -0,0 +1,66 @@
+/*
+ * 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;
+	blk_t		*block_nr;
+	int		i;
+	int		limit = fs->blocksize >> 2;
+
+	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;
+	}
+#ifdef EXT2FS_ENABLE_SWAPFS
+	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)
+{
+	blk_t		*block_nr;
+	int		i;
+	int		limit = fs->blocksize >> 2;
+
+	if (fs->flags & EXT2_FLAG_IMAGE_FILE)
+		return 0;
+
+#ifdef EXT2FS_ENABLE_SWAPFS
+	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);
+}
+
+