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/* $Xorg: lbxzlib.h,v 1.3 2000/08/18 04:05:45 coskrey Exp $ */
/*
* Copyright 1993 Network Computing Devices
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of NCD. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. NCD. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD.
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Dale Tonogai, Network Computing Devices
*/
#ifndef _ZLIB_H_
#define _ZLIB_H_
#define ZLIB_STRCOMP_OPT "XC-ZLIB"
#define ZLIB_STRCOMP_OPT_LEN 7
#define ZLIB_PACKET_HDRLEN 2
#define ZLIB_MAX_DATALEN 0xfff
#define ZLIB_MAX_PLAIN 270
#define ZLIB_MAX_OUTLEN (ZLIB_MAX_PLAIN << 1)
#define ZLIB_COMPRESS_FLAG 0x80
#define ZLIB_DATALEN_MASK 0x0f
#define ZLIB_PUT_PKTHDR(p, len, compflag) \
{ \
(p)[0] = ((unsigned)(len)) >> 8 | ((compflag) ? ZLIB_COMPRESS_FLAG : 0);\
(p)[1] = (len) & 0xff; \
}
#define ZLIB_GET_DATALEN(p) \
((((unsigned)((p)[0] & ZLIB_DATALEN_MASK)) << 8) | (unsigned)(p)[1])
#define ZLIB_COMPRESSED(p) ((p)[0] & ZLIB_COMPRESS_FLAG)
struct ZlibInfo;
extern void * ZlibInit ( int fd, int level );
extern void ZlibFree ( struct ZlibInfo *comp );
extern int ZlibFlush ( int fd );
extern int ZlibStuffInput ( int fd, unsigned char *buffer, int buflen );
extern void ZlibCompressOn ( int fd );
extern void ZlibCompressOff ( int fd );
extern int ZlibWrite ( int fd, unsigned char *buffer, int buflen );
extern int ZlibWriteV ( int fd, struct iovec *iov, int iovcnt );
extern int ZlibRead ( int fd, unsigned char *buffer, int buflen );
extern int ZlibInputAvail ( int fd );
#endif /* _ZLIB_H_ */
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