diff options
Diffstat (limited to 'lib/sqfs/src/super.c')
-rw-r--r-- | lib/sqfs/src/super.c | 50 |
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; +} |