Support associating a user pointer with data blocks

This commit modifies the block processor to support associating a user
data pointer with data blocks that it forwards to the block writer,
which is modified to accept an optional user data pointer.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/sqfs/block_processor/internal.h b/lib/sqfs/block_processor/internal.h
index 61e13d7..d28e023 100644
--- a/lib/sqfs/block_processor/internal.h
+++ b/lib/sqfs/block_processor/internal.h
@@ -42,6 +42,9 @@ typedef struct sqfs_block_t {
 	   consolidate in reverse order. */
 	struct sqfs_block_t *frag_list;
 
+	/* User data pointer */
+	void *user;
+
 	sqfs_u8 data[];
 } sqfs_block_t;
 
@@ -59,6 +62,7 @@ struct sqfs_block_processor_t {
 	sqfs_block_t *blk_current;
 	sqfs_u32 blk_flags;
 	sqfs_u32 blk_index;
+	void *user;
 
 	sqfs_block_t *free_list;