1 files changed, 50 insertions, 0 deletions
diff --git a/lib/sqfs/src/super.c b/lib/sqfs/src/super.c
new file mode 100644
index 0000000..470c06a
--- /dev/null
+++ b/lib/sqfs/src/super.c
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: LGPL-3.0-or-later */
+/*
+ * super.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#define SQFS_BUILDING_DLL
+#include "config.h"
+
+#include "sqfs/super.h"
+#include "sqfs/error.h"
+
+#include <string.h>
+
+int sqfs_super_init(sqfs_super_t *super, size_t block_size, sqfs_u32 mtime,
+		    SQFS_COMPRESSOR compressor)
+{
+	unsigned int i;
+
+	if (block_size & (block_size - 1))
+		return SQFS_ERROR_SUPER_BLOCK_SIZE;
+
+	if (block_size < SQFS_MIN_BLOCK_SIZE)
+		return SQFS_ERROR_SUPER_BLOCK_SIZE;
+
+	if (block_size > SQFS_MAX_BLOCK_SIZE)
+		return SQFS_ERROR_SUPER_BLOCK_SIZE;
+
+	memset(super, 0, sizeof(*super));
+	super->magic = SQFS_MAGIC;
+	super->modification_time = mtime;
+	super->block_size = block_size;
+	super->compression_id = compressor;
+	super->flags = SQFS_FLAG_NO_FRAGMENTS | SQFS_FLAG_NO_XATTRS;
+	super->flags |= SQFS_FLAG_NO_DUPLICATES;
+	super->version_major = SQFS_VERSION_MAJOR;
+	super->version_minor = SQFS_VERSION_MINOR;
+	super->bytes_used = sizeof(*super);
+	super->id_table_start = 0xFFFFFFFFFFFFFFFFUL;
+	super->xattr_id_table_start = 0xFFFFFFFFFFFFFFFFUL;
+	super->inode_table_start = 0xFFFFFFFFFFFFFFFFUL;
+	super->directory_table_start = 0xFFFFFFFFFFFFFFFFUL;
+	super->fragment_table_start = 0xFFFFFFFFFFFFFFFFUL;
+	super->export_table_start = 0xFFFFFFFFFFFFFFFFUL;
+
+	for (i = block_size; i != 0x01; i >>= 1)
+		super->block_log += 1;
+
+	return 0;
+}