| 1 | /* $Xorg: lbxzlib.h,v 1.3 2000/08/18 04:05:45 coskrey Exp $ */
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| 2 | /*
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| 3 | * Copyright 1993 Network Computing Devices
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| 4 | *
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| 5 | * Permission to use, copy, modify, distribute, and sell this software and its
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| 6 | * documentation for any purpose is hereby granted without fee, provided that
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| 7 | * the above copyright notice appear in all copies and that both that
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| 8 | * copyright notice and this permission notice appear in supporting
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| 9 | * documentation, and that the name of NCD. not be used in advertising or
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| 10 | * publicity pertaining to distribution of the software without specific,
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| 11 | * written prior permission. NCD. makes no representations about the
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| 12 | * suitability of this software for any purpose. It is provided "as is"
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| 13 | * without express or implied warranty.
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| 14 | *
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| 15 | * NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD.
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| 17 | * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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| 18 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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| 19 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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| 20 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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| 21 | *
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| 22 | * Author: Dale Tonogai, Network Computing Devices
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| 23 | */
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| 24 |
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| 25 | #ifndef _ZLIB_H_
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| 26 | #define _ZLIB_H_
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| 27 |
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| 28 | #define ZLIB_STRCOMP_OPT "XC-ZLIB"
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| 29 | #define ZLIB_STRCOMP_OPT_LEN 7
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| 30 |
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| 31 | #define ZLIB_PACKET_HDRLEN 2
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| 32 | #define ZLIB_MAX_DATALEN 0xfff
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| 33 | #define ZLIB_MAX_PLAIN 270
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| 34 | #define ZLIB_MAX_OUTLEN (ZLIB_MAX_PLAIN << 1)
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| 35 |
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| 36 | #define ZLIB_COMPRESS_FLAG 0x80
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| 37 | #define ZLIB_DATALEN_MASK 0x0f
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| 38 |
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| 39 | #define ZLIB_PUT_PKTHDR(p, len, compflag) \
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| 40 | { \
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| 41 | (p)[0] = ((unsigned)(len)) >> 8 | ((compflag) ? ZLIB_COMPRESS_FLAG : 0);\
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| 42 | (p)[1] = (len) & 0xff; \
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| 43 | }
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| 44 |
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| 45 | #define ZLIB_GET_DATALEN(p) \
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| 46 | ((((unsigned)((p)[0] & ZLIB_DATALEN_MASK)) << 8) | (unsigned)(p)[1])
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| 47 |
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| 48 | #define ZLIB_COMPRESSED(p) ((p)[0] & ZLIB_COMPRESS_FLAG)
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| 49 |
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| 50 | struct ZlibInfo;
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| 51 |
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| 52 | extern void * ZlibInit ( int fd, int level );
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| 53 | extern void ZlibFree ( struct ZlibInfo *comp );
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| 54 | extern int ZlibFlush ( int fd );
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| 55 | extern int ZlibStuffInput ( int fd, unsigned char *buffer, int buflen );
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| 56 | extern void ZlibCompressOn ( int fd );
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| 57 | extern void ZlibCompressOff ( int fd );
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| 58 | extern int ZlibWrite ( int fd, unsigned char *buffer, int buflen );
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| 59 | extern int ZlibWriteV ( int fd, struct iovec *iov, int iovcnt );
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| 60 | extern int ZlibRead ( int fd, unsigned char *buffer, int buflen );
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| 61 | extern int ZlibInputAvail ( int fd );
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| 62 |
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| 63 |
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| 64 | #endif /* _ZLIB_H_ */
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