/*
 * 
 *
 * Author:	Martin Hunt
 *		Networks and Distributed Computing
 *		Computing & Communications
 *		University of Washington
 *		Administration Building, AG-44
 *		Seattle, WA  98195
 *		Internet: martinh@cac.washington.edu
 *
 *
 * Copyright 1992 by the University of Washington
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted, provided
 * that the above copyright notice appears in all copies and that both the
 * above copyright notice and this permission notice appear in supporting
 * documentation, and that the name of the University of Washington not be
 * used in advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission.  This software is made
 * available "as is", and
 * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
 * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
 * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
 * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */
#ifndef lint
static char rcsid[] =
    "@(#) $Header: /usr/staff/martinh/tcpview/RCS/generic.c,v 1.2 1993/04/22 20:21:25 martinh Exp $ (UW)";
#endif


/* This implements a filter which simply filters out control characters and
prints their ASCII value in angle brackets.  You may want to use this as a template
for writing other simple filters. */

#include <stdio.h>
#include <sys/types.h>

int PrintFrames = 0;

#ifdef __STDC__
int getbyte(void);
u_short getword(void);
u_long getlword(void);
#else
int getbyte();
u_short getword();
u_long getlword();
#endif

main(argc, argv)
int argc;
char *argv[];
{
  int c, i=0;
  int type;
  int length;

  /* you must check for "-f" to see if frames will be printed too */
  /* PrintFrames is a global used by hexread() in hex.c */
  if( argc > 1 )
    if( *argv[1]=='-' && argv[1][1]=='f' )
      PrintFrames=1;

  while( (c = getbyte()) != EOF) {
    if( c=='\n' ) {
      putchar('\n');
      c = getbyte();
      if( c=='\r' )
	continue;
    } else if( c=='\r' ) {
      putchar('\n');
      c = getbyte();
      if( c=='\n')
	continue;
    } 

    if( c=='\t' )
      putchar(c);
    else if( c>31 && c<128 )
      putchar(c);
    else
      printf("<%d>",c);
  }
}

/* some basic I/O functions */

int getbyte()
{
  u_char b;
  if(hexread(&b,1))
    return( (int)b );
  else 
    return( EOF );
}

u_short getword()
{
  unsigned short buf;
  if( hexread(&buf,2) )
    return( ntohs(buf) );
  else
    return( EOF );
}

u_long getlword()
{
  unsigned int buf;
  if( hexread(&buf,4) )
    return( ntohl(buf) );
  else
    return( EOF );
}