1 /* Copyright (C) 2001-2019 Artifex Software, Inc. 2 All Rights Reserved. 3 4 This software is provided AS-IS with no warranty, either express or 5 implied. 6 7 This software is distributed under license and may not be copied, 8 modified or distributed except as expressly authorized under the terms 9 of the license contained in the file LICENSE in this distribution. 10 11 Refer to licensing information at http://www.artifex.com or contact 12 Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato, 13 CA 94945, U.S.A., +1(415)492-9861, for further information. 14 */ 15 16 17 /* zlib filter state definition */ 18 19 #ifndef szlibx_INCLUDED 20 # define szlibx_INCLUDED 21 22 #include "scommon.h" 23 24 /* Define an opaque type for the dynamic part of the state. */ 25 typedef struct zlib_dynamic_state_s zlib_dynamic_state_t; 26 27 /* Define the stream state structure. */ 28 typedef struct stream_zlib_state_s { 29 stream_state_common; 30 /* Parameters - compression and decompression */ 31 int windowBits; 32 bool no_wrapper; /* omit wrapper and checksum */ 33 /* Parameters - compression only */ 34 int level; /* effort level */ 35 int method; 36 int memLevel; 37 int strategy; 38 /* Dynamic state */ 39 zlib_dynamic_state_t *dynamic; 40 } stream_zlib_state; 41 42 /* 43 * The state descriptor is public only to allow us to split up 44 * the encoding and decoding filters. 45 */ 46 extern_st(st_zlib_state); 47 #define public_st_zlib_state() /* in szlibc.c */\ 48 gs_public_st_ptrs1(st_zlib_state, stream_zlib_state,\ 49 "zlibEncode/Decode state", zlib_state_enum_ptrs, zlib_state_reloc_ptrs,\ 50 dynamic) 51 extern const stream_template s_zlibD_template; 52 extern const stream_template s_zlibE_template; 53 54 /* Shared procedures */ 55 stream_proc_set_defaults(s_zlib_set_defaults); 56 57 #endif /* szlibx_INCLUDED */ 58