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/* $XConsortium: lbxopts.h /main/9 1996/11/15 21:33:35 rws $ */
/*
* Copyright 1994 Network Computing Devices, Inc.
*
* 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 Network Computing Devices, Inc. not be
* used in advertising or publicity pertaining to distribution of this
* software without specific, written prior permission.
*
* THIS SOFTWARE IS PROVIDED `AS-IS'. NETWORK COMPUTING DEVICES, INC.,
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT
* LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NONINFRINGEMENT. IN NO EVENT SHALL NETWORK
* COMPUTING DEVICES, INC., BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING
* SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOSS OF USE, DATA,
* OR PROFITS, EVEN IF ADVISED OF THE POSSIBILITY THEREOF, AND REGARDLESS OF
* WHETHER IN AN ACTION IN CONTRACT, TORT OR NEGLIGENCE, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/* $XFree86: xc/include/extensions/lbxopts.h,v 1.3 1997/01/18 07:17:15 dawes Exp $ */
#ifndef _LBX_OPTS_H_
#define _LBX_OPTS_H_
/*
* Negotiable configuration options
*/
#define LBX_OPT_DELTA_PROXY 0
#define LBX_OPT_DELTA_SERVER 1
#define LBX_OPT_STREAM_COMP 2
#define LBX_OPT_BITMAP_COMP 3
#define LBX_OPT_PIXMAP_COMP 4
#define LBX_OPT_MSG_COMP 5 /* aka "squishing" */
#define LBX_OPT_USE_TAGS 6
#define LBX_OPT_CMAP_ALL 7
#define LBX_OPT_EXTENSION 255
/*
* Length fields are encoded in 1 or 3 bytes
*/
#define LBX_OPT_SMALLLEN_SIZE 1
#define LBX_OPT_BIGLEN_SIZE 3
#define LBX_OPT_BIGLEN_MIN 256
#define LBX_OPT_DECODE_LEN(p, len, size) \
if ((p)[0]) { \
(len) = (p)[0]; \
(size) = LBX_OPT_SMALLLEN_SIZE; \
} \
else { \
(len) = LBX_OPT_BIGLEN_MIN + (p)[1] << 8 | (p)[2]; \
(size) = LBX_OPT_BIGLEN_SIZE; \
}
/*
* Option header lengths
*/
#define LBX_OPT_SMALLHDR_LEN (1 + LBX_OPT_SMALLLEN_SIZE)
#define LBX_OPT_BIGHDR_LEN (1 + LBX_OPT_BIGLEN_SIZE)
/*
* Delta compression parameters
*/
#define LBX_OPT_DELTA_REQLEN 6
#define LBX_OPT_DELTA_REPLYLEN 2
#define LBX_OPT_DELTA_NCACHE_DFLT 16
#define LBX_OPT_DELTA_MSGLEN_MIN 32
#define LBX_OPT_DELTA_MSGLEN_DFLT 64
/*
* Stream compression opts
*/
#include <sys/types.h>
#if defined(WIN32) || (defined(USG) && !defined(CRAY) && !defined(umips) && !defined(MOTOROLA) && !defined(uniosu) && !defined(__sxg__))
struct iovec {
caddr_t iov_base;
int iov_len;
};
#else
#ifndef Lynx
#include <sys/uio.h>
#else
#include <uio.h>
#endif
#endif
typedef void *LbxStreamCompHandle;
typedef struct _LbxStreamOpts {
LbxStreamCompHandle (*streamCompInit)();
pointer streamCompArg;
int (*streamCompStuffInput)(
int fd,
unsigned char *buf,
int buflen
);
int (*streamCompInputAvail)(
int fd
);
int (*streamCompFlush)(
int fd
);
int (*streamCompRead)(
int fd,
unsigned char *buf,
int buflen
);
int (*streamCompWriteV)(
int fd,
struct iovec *iov,
int iovcnt
);
void (*streamCompOn)(
int fd
);
void (*streamCompOff)(
int fd
);
void (*streamCompFreeHandle)(
LbxStreamCompHandle handle
);
} LbxStreamOpts;
#endif /* _LBX_OPTS_H_ */
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