1 /* $Xorg: lbxzlib.h,v 1.3 2000/08/18 04:05:45 coskrey Exp $ */ 2 /* 3 * Copyright 1993 Network Computing Devices 4 * 5 * Permission to use, copy, modify, distribute, and sell this software and its 6 * documentation for any purpose is hereby granted without fee, provided that 7 * the above copyright notice appear in all copies and that both that 8 * copyright notice and this permission notice appear in supporting 9 * documentation, and that the name of NCD. not be used in advertising or 10 * publicity pertaining to distribution of the software without specific, 11 * written prior permission. NCD. makes no representations about the 12 * suitability of this software for any purpose. It is provided "as is" 13 * without express or implied warranty. 14 * 15 * NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD. 17 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 19 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 20 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 * 22 * Author: Dale Tonogai, Network Computing Devices 23 */ 24 25 #ifndef _ZLIB_H_ 26 #define _ZLIB_H_ 27 28 #define ZLIB_STRCOMP_OPT "XC-ZLIB" 29 #define ZLIB_STRCOMP_OPT_LEN 7 30 31 #define ZLIB_PACKET_HDRLEN 2 32 #define ZLIB_MAX_DATALEN 0xfff 33 #define ZLIB_MAX_PLAIN 270 34 #define ZLIB_MAX_OUTLEN (ZLIB_MAX_PLAIN << 1) 35 36 #define ZLIB_COMPRESS_FLAG 0x80 37 #define ZLIB_DATALEN_MASK 0x0f 38 39 #define ZLIB_PUT_PKTHDR(p, len, compflag) \ 40 { \ 41 (p)[0] = ((unsigned)(len)) >> 8 | ((compflag) ? ZLIB_COMPRESS_FLAG : 0);\ 42 (p)[1] = (len) & 0xff; \ 43 } 44 45 #define ZLIB_GET_DATALEN(p) \ 46 ((((unsigned)((p)[0] & ZLIB_DATALEN_MASK)) << 8) | (unsigned)(p)[1]) 47 48 #define ZLIB_COMPRESSED(p) ((p)[0] & ZLIB_COMPRESS_FLAG) 49 50 struct ZlibInfo; 51 52 extern void * ZlibInit ( int fd, int level ); 53 extern void ZlibFree ( struct ZlibInfo *comp ); 54 extern int ZlibFlush ( int fd ); 55 extern int ZlibStuffInput ( int fd, unsigned char *buffer, int buflen ); 56 extern void ZlibCompressOn ( int fd ); 57 extern void ZlibCompressOff ( int fd ); 58 extern int ZlibWrite ( int fd, unsigned char *buffer, int buflen ); 59 extern int ZlibWriteV ( int fd, struct iovec *iov, int iovcnt ); 60 extern int ZlibRead ( int fd, unsigned char *buffer, int buflen ); 61 extern int ZlibInputAvail ( int fd ); 62 63 64 #endif /* _ZLIB_H_ */ 65
