zlib: add inflateReset2()...

metze
(This used to be commit 2a4fb661d7e3d601a5eb9ccecb4d4f2b07073097)

1 files changed, 15 insertions, 0 deletions

diff --git a/source4/lib/zlib/zlib.h b/source4/lib/zlib/zlib.h
index 022817927c..20a16d9588 100644
--- a/source4/lib/zlib/zlib.h
+++ b/source4/lib/zlib/zlib.h
@@ -204,6 +204,9 @@ typedef gz_header FAR *gz_headerp;
 
 #define Z_NULL  0  /* for initializing zalloc, zfree, opaque */
 
+#define Z_RESET_KEEP_WINDOW 0x0001
+/* This flag can be passed to inflateReset2 and deflateReset2 */
+
 #define zlib_version zlibVersion()
 /* for compatibility with versions < 1.0.2 */
 
@@ -786,6 +789,8 @@ ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
    destination.
 */
 
+ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm, unsigned flags));
+
 ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
 /*
      This function is equivalent to inflateEnd followed by inflateInit,
@@ -796,6 +801,16 @@ ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
    stream state was inconsistent (such as zalloc or state being NULL).
 */
 
+ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm, unsigned flags));
+/*
+     This function is like inflateReset, but you can pass some flags
+   to have further control over the behavior. If you pass Z_RESET_KEEP_WINDOW
+   the window will be untouched and will be reused in the next runs of inflate()
+
+      inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
 ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
                                      int bits,
                                      int value));