libsparse: add function to resparse a file and a utility to use it
Add sparse_file_repsarse, which splits chunks in an existing sparse
file such that the maximum size of a chunk, plus a header and footer,
is smaller than the given size. This will allow multiple smaller
sparse files to result in the same data as a large sparse file.
Change-Id: I177abdb958a23d5afd394ff265c5b0c6a3ff22fa
diff --git a/libsparse/backed_block.h b/libsparse/backed_block.h
index 6926917..1a159be 100644
--- a/libsparse/backed_block.h
+++ b/libsparse/backed_block.h
@@ -48,6 +48,8 @@
int64_t backed_block_file_offset(struct backed_block *bb);
uint32_t backed_block_fill_val(struct backed_block *bb);
enum backed_block_type backed_block_type(struct backed_block *bb);
+int backed_block_split(struct backed_block_list *bbl, struct backed_block *bb,
+ unsigned int max_len);
struct backed_block *backed_block_iter_new(struct backed_block_list *bbl);
struct backed_block *backed_block_iter_next(struct backed_block *bb);
@@ -55,4 +57,8 @@
struct backed_block_list *backed_block_list_new(unsigned int block_size);
void backed_block_list_destroy(struct backed_block_list *bbl);
+void backed_block_list_move(struct backed_block_list *from,
+ struct backed_block_list *to, struct backed_block *start,
+ struct backed_block *end);
+
#endif