Add fakey 'deflateBound()' function to the in-kernel zlib routines

It's not the real deflateBound() in newer zlib libraries, partly because the upcoming usage of it won't have the "stream" available, so we can't have the same interfaces anyway.

Add fakey 'deflateBound()' function to the in-kernel zlib routines
It's not the real deflateBound() in newer zlib libraries, partly because the upcoming usage of it won't have the "stream" available, so we can't have the same interfaces anyway.
Linus Torvalds
1 parent 021a52ac70
Showing 1 changed file with 5 additions and 0 deletions Side-by-side Diff
include/linux/zlib.h
@@ -506,6 +506,11 @@
    stream state was inconsistent (such as zalloc or state being NULL).
 */
  
+static inline unsigned long deflateBound(unsigned long s)
+{
+	return s + ((s + 7) >> 3) + ((s + 63) >> 6) + 11;
+}
+
 extern int zlib_deflateParams (z_streamp strm, int level, int strategy);
 /*
      Dynamically update the compression level and compression strategy.  The
...	...	@@ -506,6 +506,11 @@
506	506	stream state was inconsistent (such as zalloc or state being NULL).
507	507	*/
508	508
	509	+static inline unsigned long deflateBound(unsigned long s)
	510	+{
	511	+ return s + ((s + 7) >> 3) + ((s + 63) >> 6) + 11;
	512	+}
	513	+
509	514	extern int zlib_deflateParams (z_streamp strm, int level, int strategy);
510	515	/*
511	516	Dynamically update the compression level and compression strategy. The