1 files changed, 74 insertions, 0 deletions
diff --git a/lib/ext2fs/dirblock.c b/lib/ext2fs/dirblock.c
new file mode 100644
index 00000000..bb2f7175
--- /dev/null
+++ b/lib/ext2fs/dirblock.c
@@ -0,0 +1,74 @@
+/*
+ * dirblock.c --- directory block routines.
+ * 
+ * Copyright (C) 1995 Theodore Ts'o.  This file may be redistributed
+ * under the terms of the GNU Public License.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <time.h>
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#include <linux/ext2_fs.h>
+
+#include "ext2fs.h"
+
+errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
+				void *buf)
+{
+	errcode_t	retval;
+	char		*p, *end;
+	struct ext2_dir_entry *dirent;
+
+ 	retval = io_channel_read_blk(fs->io, block, 1, buf);
+	if (retval)
+		return retval;
+	if ((fs->flags & EXT2_SWAP_BYTES) == 0)
+		return 0;
+	p = buf;
+	end = (char *) buf + fs->blocksize;
+	while (p < end) {
+		dirent = (struct ext2_dir_entry *) p;
+		dirent->inode = ext2fs_swab32(dirent->inode);
+		dirent->rec_len = ext2fs_swab16(dirent->rec_len);
+		dirent->name_len = ext2fs_swab16(dirent->name_len);
+		p += (dirent->rec_len < 8) ? 8 : dirent->rec_len;
+	}
+	return 0;
+}
+
+errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
+				 void *inbuf)
+{
+	errcode_t	retval;
+	char		*p, *end, *write_buf;
+	char		*buf = 0;
+	struct ext2_dir_entry *dirent;
+
+	if (fs->flags & EXT2_SWAP_BYTES) {
+		write_buf = buf = malloc(fs->blocksize);
+		if (!buf)
+			return ENOMEM;
+		memcpy(buf, inbuf, fs->blocksize);
+		p = buf;
+		end = buf + fs->blocksize;
+		while (p < end) {
+			dirent = (struct ext2_dir_entry *) p;
+			p += (dirent->rec_len < 8) ? 8 : dirent->rec_len;
+			dirent->inode = ext2fs_swab32(dirent->inode);
+			dirent->rec_len = ext2fs_swab16(dirent->rec_len);
+			dirent->name_len = ext2fs_swab16(dirent->name_len);
+		}
+	} else
+		write_buf = inbuf;
+ 	retval = io_channel_write_blk(fs->io, block, 1, write_buf);
+	if (buf)
+		free(buf);
+	return retval;
+}
+
+