75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*
|
|
* Copyright (C) 1995 Advanced RISC Machines Limited. All rights reserved.
|
|
*
|
|
* This software may be freely used, copied, modified, and distributed
|
|
* provided that the above copyright notice is preserved in all copies of the
|
|
* software.
|
|
*/
|
|
|
|
/* -*-C-*-
|
|
*
|
|
* $Revision$
|
|
* $Date$
|
|
*
|
|
*
|
|
* msgbuild.h - utilities for assembling and interpreting ADP messages
|
|
*/
|
|
|
|
#ifndef angel_msgbuild_h
|
|
#define angel_msgbuild_h
|
|
#include <stdarg.h>
|
|
#include "channels.h"
|
|
|
|
/*
|
|
* msgbuild
|
|
* --------
|
|
* We use a "varargs" function to enable a description of how the
|
|
* final message should look to be provided. We use a function rather
|
|
* than in-line macros to keep the size of Angel small.
|
|
*
|
|
* The "buffer" pointer is the starting point from where the data will
|
|
* be written. Note: If a NULL pointer is passed then no data will be
|
|
* written, but the size information will be returned. This allows
|
|
* code to call this routine with a NULL "buffer" pointer to ascertain
|
|
* whether the pointer they are passing contains enough space for the
|
|
* message being constructed.
|
|
*
|
|
* The "format" string should contain sequences of the following
|
|
* tokens:
|
|
* %w - insert 32bit word value
|
|
* %p - insert 32bit target pointer value
|
|
* %h - insert 16bit value
|
|
* %b - insert 8bit byte value
|
|
*
|
|
* The return parameter is the final byte length of the data written.
|
|
*/
|
|
unsigned int msgbuild(unsigned char *buffer, const char *format, ...);
|
|
unsigned int vmsgbuild(unsigned char *buffer, const char *format,
|
|
va_list args);
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* msgsend
|
|
* -------
|
|
* As for msgbuild except that it allocates a buffer, formats the data as
|
|
* for msgbuild and transmits the packet. Returns 0 if successful non 0 if ot
|
|
* fails.
|
|
* Not for use on cooked channels e.g. debug channels only.
|
|
*/
|
|
extern int msgsend(ChannelID chan, const char *format, ...);
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* Unpack_message
|
|
* --------------
|
|
* This basically does the opposite of msg_build, it takes a message, and
|
|
* a scanf type format string (but much cut down functionality) and returns
|
|
* the arguments in the message.
|
|
*/
|
|
extern unsigned int unpack_message(unsigned char *buffer, const char *format, ...);
|
|
|
|
#endif /* ndef angel_msgbuild_h */
|
|
|
|
/* EOF msgbuild.h */
|