+#define HTTP_ENCODING_STREAM_FLUSH_NONE 0x00000000
+#define HTTP_ENCODING_STREAM_FLUSH_SYNC 0x00100000
+#define HTTP_ENCODING_STREAM_FLUSH_FULL 0x00200000
+
+#define HTTP_ENCODING_STREAM_FLUSH_FLAG(f) ( \
+ (f) & HTTP_ENCODING_STREAM_FLUSH_FULL ? Z_FULL_FLUSH : \
+ (f) & HTTP_ENCODING_STREAM_FLUSH_SYNC ? Z_SYNC_FLUSH : \
+ Z_NO_FLUSH)
+