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