Variable chunk size support (currently XPRESS only)

[wimlib] / include / wimlib / wim.h

diff --git a/include/wimlib/wim.h b/include/wimlib/wim.h
index d1e0971372f460cd7edc5289be6b3ac80f7e1785..e972950cf720b563013ba78721c337944b29c0a5 100644 (file)
--- a/include/wimlib/wim.h
+++ b/include/wimlib/wim.h
@@ -70,6 +70,21 @@ struct WIMStruct {
 
        /* One of WIMLIB_COMPRESSION_TYPE_*, cached from the header flags. */
        u8 compression_type : 2;
+
+       /* Overwritten compression type for wimlib_overwrite() or
+        * wimlib_write().  Can be changed by
+        * wimlib_set_output_compression_type(); otherwise is the same as
+        * compression_type.  */
+       u8 out_compression_type : 2;
+
+       /* Uncompressed size of compressed chunks in this WIM (cached from
+        * header).  */
+       u32 chunk_size;
+
+       /* Overridden chunk size for wimlib_overwrite() or wimlib_write().  Can
+        * be changed by wimlib_set_output_chunk_size(); otherwise is the same
+        * as chunk_size.  */
+       u32 out_chunk_size;
 };
 
 static inline bool wim_is_pipable(const WIMStruct *wim)
@@ -90,8 +105,11 @@ static inline bool wim_has_metadata(const WIMStruct *wim)
 extern void
 wim_recalculate_refcnts(WIMStruct *wim);
 
+extern u32
+get_wim_hdr_cflags(int ctype);
+
 extern int
-init_wim_header(struct wim_header *hdr, int ctype);
+init_wim_header(struct wim_header *hdr, int ctype, u32 chunk_size);
 
 extern int
 read_wim_header(const tchar *filename, struct filedes *in_fd,