meta_entry
struct meta_entry *meta_entry;
meta_entry = &meta->meta_entry[offset - meta->offset];
cur_index_block = meta_entry->index_block +
cur_offset = meta_entry->offset;
cur_data_block = meta_entry->data_block;
meta_entry = &meta->meta_entry[i - meta->offset];
meta_entry->index_block = cur_index_block -
meta_entry->offset = cur_offset;
meta_entry->data_block = cur_data_block;
struct meta_entry meta_entry[SQUASHFS_META_ENTRIES];