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/*
* 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.c - utilities for assembling and interpreting ADP messages
*
*/
#include <stdarg.h> /* ANSI varargs support */
#ifdef TARGET
# include "angel.h"
# include "devconf.h"
#else
# include "host.h"
# include "hostchan.h"
#endif
#include "channels.h"
#include "buffers.h"
#include "angel_endian.h" /* Endianness support macros */
#include "msgbuild.h" /* Header file for this source code */
#ifndef UNUSED
# define UNUSED(x) ((x)=(x))
#endif
#ifndef TARGET
extern unsigned int Armsd_BufferSize;
#endif /* ndef TARGET */
unsigned int vmsgbuild(unsigned char *buffer, const char *format, va_list args)
{
unsigned int blen = 0;
int ch;
/* Step through the format string */
while ((ch = *format++) != '\0')
{
if (ch != '%')
{
if (buffer != NULL)
*buffer++ = (unsigned char)ch;
blen++;
}
else
{
switch (ch = *format++)
{
case 'w':
case 'W':
/* 32bit pointer */
case 'p':
case 'P':
{
/* 32bit word / 32bit pointer */
unsigned int na = va_arg(args, unsigned int);
if (buffer != NULL)
{
PUT32LE(buffer, na);
buffer += sizeof(unsigned int);
}
blen += sizeof(unsigned int);
break;
}
case 'h':
case 'H':
{
/* 16bit value */
unsigned int na = va_arg(args, unsigned int);
if (buffer != NULL)
{
PUT16LE(buffer, na);
buffer += sizeof(unsigned short);
}
blen += sizeof(unsigned short);
break;
}
case 'c':
case 'C':
case 'b':
case 'B':
/* 8bit character / 8bit byte */
ch = va_arg(args, int);
/*
* XXX
*
* fall through to the normal character processing
*/
case '%':
default:
/* normal '%' character, or a different normal character */
if (buffer != NULL)
*buffer++ = (unsigned char)ch;
blen++;
break;
}
}
}
return blen;
}
/*
* msgbuild
* --------
* Simple routine to aid in construction of Angel messages. See the
* "msgbuild.h" header file for a detailed description of the operation
* of this routine.
*/
unsigned int msgbuild(unsigned char *buffer, const char *format, ...)
{
va_list args;
unsigned int blen;
va_start(args, format);
blen = vmsgbuild(buffer, format, args);
va_end(args);
return blen;
}
#if !defined(JTAG_ADP_SUPPORTED) && !defined(MSG_UTILS_ONLY)
/*
* This routine allocates a buffer, puts the data supplied as
* parameters into the buffer and sends the message. It does *NOT*
* wait for a reply.
*/
extern int msgsend(ChannelID chan, const char *format,...)
{
unsigned int length;
p_Buffer buffer;
va_list args;
# ifndef TARGET
Packet *packet;
packet = DevSW_AllocatePacket(Armsd_BufferSize);
buffer = packet->pk_buffer;
# else
buffer = angel_ChannelAllocBuffer(Angel_ChanBuffSize);
# endif
if (buffer != NULL)
{
va_start(args, format);
length = vmsgbuild(BUFFERDATA(buffer), format, args);
# ifdef TARGET
angel_ChannelSend(CH_DEFAULT_DEV, chan, buffer, length);
# else
packet->pk_length = length;
Adp_ChannelWrite(chan, packet);
# endif
va_end(args);
return 0;
}
else
return -1;
}
#endif /* ndef JTAG_ADP_SUPPORTED && ndef MSG_UTILS_ONLY */
/*
* unpack_message
* --------------
*/
extern unsigned int unpack_message(unsigned char *buffer, const char *format, ...)
{
va_list args;
unsigned int blen = 0;
int ch;
char *chp = NULL;
va_start(args, format);
/* Step through the format string. */
while ((ch = *format++) != '\0')
{
if (ch != '%')
{
if (buffer != NULL)
ch = (unsigned char)*buffer++;
blen++;
}
else
{
switch (ch = *format++)
{
case 'w':
case 'W':
{
/* 32bit word. */
unsigned int *nap = va_arg(args, unsigned int*);
if (buffer != NULL)
{
*nap = PREAD32(LE, buffer);
buffer += sizeof(unsigned int);
}
blen += sizeof(unsigned int);
break;
}
case 'h':
case 'H':
{
/* 16bit value. */
unsigned int *nap = va_arg(args, unsigned int*);
if (buffer != NULL)
{
*nap = PREAD16(LE,buffer);
buffer += sizeof(unsigned short);
}
blen += sizeof(unsigned short);
break;
}
case 'c':
case 'C':
case 'b':
case 'B':
/* 8-bit character, or 8-bit byte */
chp = va_arg(args, char*);
/*
* XXX
*
* fall through to the normal character processing.
*/
case '%':
default:
/* normal '%' character, or a different normal character */
if (buffer != NULL)
*chp = (unsigned char)*buffer++;
blen++;
break;
}
}
}
va_end(args);
return(blen);
}
/* EOF msgbuild.c */
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