//==========================================================================
//
//      ./lib/current/include/snmp_debug.h
//
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
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//####ECOSGPLCOPYRIGHTEND####
//####UCDSNMPCOPYRIGHTBEGIN####
//
// -------------------------------------------
//
// Portions of this software may have been derived from the UCD-SNMP
// project,  <http://ucd-snmp.ucdavis.edu/>  from the University of
// California at Davis, which was originally based on the Carnegie Mellon
// University SNMP implementation.  Portions of this software are therefore
// covered by the appropriate copyright disclaimers included herein.
//
// The release used was version 4.1.2 of May 2000.  "ucd-snmp-4.1.2"
// -------------------------------------------
//
//####UCDSNMPCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    hmt
// Contributors: hmt
// Date:         2000-05-30
// Purpose:      Port of UCD-SNMP distribution to eCos.
// Description:  
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================
/********************************************************************
       Copyright 1989, 1991, 1992 by Carnegie Mellon University

			  Derivative Work -
Copyright 1996, 1998, 1999, 2000 The Regents of the University of California

			 All Rights Reserved

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 that copyright notice and this permission notice appear in
supporting documentation, and that the name of CMU and The Regents of
the University of California not be used in advertising or publicity
pertaining to distribution of the software without specific written
permission.

CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL CMU OR
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,
INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*********************************************************************/
#ifndef SNMP_DEBUG_H
#define SNMP_DEBUG_H

#ifdef __cplusplus
extern "C" {
#endif

/* snmp_debug.h:

   - prototypes for snmp debugging routines.
   - easy to use macros to wrap around the functions.  This also provides
     the ability to reove debugging code easily from the applications at
     compile time.
*/


/* These functions should not be used, if at all possible.  Instead, use
   the macros below. */
#if HAVE_STDARG_H
void debugmsg(const char *token, const char *format, ...);
void debugmsgtoken(const char *token, const char *format, ...);
#else
void debugmsg(va_alist);
void debugmsgtoken(va_alist);
#endif
void debugmsg_oid(const char *token, oid *theoid, size_t len);
void debugmsg_hex(const char *token, u_char *thedata, size_t len);
void debugmsg_hextli(const char *token, u_char *thedata, size_t len);
void debug_indent_add(int amount);
char *debug_indent(void);

/* Use these macros instead of the functions above to allow them to be
   re-defined at compile time to NOP for speed optimization.

   They need to be called enclosing all the arguments in a single set of ()s.
   Example:
      DEBUGMSGTL(("token", "debugging of something %s related\n", "snmp"));

Usage:
   All of the functions take a "token" argument that helps determine when
   the output in question should be printed.  See the snmpcmd.1 manual page
   on the -D flag to turn on/off output for a given token on the command line.

     DEBUGMSG((token, format, ...)):      equivelent to printf(format, ...)
                                          (if "token" debugging output
                                          is requested by the user)
  
     DEBUGMSGT((token, format, ...)):     equivelent to DEBUGMSG, but prints
                                          "token: " at the beginning of the
                                          line for you.
  
     DEBUGTRACE                           Insert this token anywhere you want
                                          tracing output displayed when the
                                          "trace" debugging token is selected.
  
     DEBUGMSGL((token, format, ...)):     equivelent to DEBUGMSG, but includes
                                          DEBUGTRACE debugging line just before
                                          yours.
  
     DEBUGMSGTL((token, format, ...)):    Same as DEBUGMSGL and DEBUGMSGT
                                          combined.

Important:
   It is considered best if you use DEBUGMSGTL() everywhere possible, as it
   gives the nicest format output and provides tracing support just before
   every debugging statement output.

To print multiple pieces to a single line in one call, use:

     DEBUGMSGTL(("token", "line part 1"));
     DEBUGMSG  (("token", " and part 2\n"));

   to get:

     token: line part 1 and part 2

   as debugging output.
*/

#ifndef SNMP_NO_DEBUGGING  /* make sure we're wanted */

/*
 * define two macros : one macro with, one without,
 *                     a test if debugging is enabled.
 * 
 * Generally, use the macro with _DBG_IF_
 */

/******************* Start private macros ************************/
#define _DBG_IF_            snmp_get_do_debugging()
#define DEBUGIF(x)         if (_DBG_IF_ && debug_is_token_registered(x) == SNMPERR_SUCCESS)

#define __DBGMSGT(x)     debugmsgtoken x,  debugmsg x

#ifdef  HAVE_CPP_UNDERBAR_FUNCTION_DEFINED
#define __DBGTRACE       __DBGMSGT(("trace","%s(): %s, %d\n",__FUNCTION__,\
                                 __FILE__,__LINE__))
#else
#define __DBGTRACE       __DBGMSGT(("trace"," %s, %d\n", __FILE__,__LINE__))
#endif

#define __DBGMSGL(x)     __DBGTRACE, debugmsg x
#define __DBGMSGTL(x)    __DBGTRACE, debugmsgtoken x, debugmsg x
#define __DBGMSGOID(x)     debugmsg_oid x
#define __DBGMSGHEX(x)     debugmsg_hex x
#define __DBGMSGHEXTLI(x)  debugmsg_hextli x
#define __DBGINDENT()      debug_indent()
#define __DBGINDENTADD(x)  debug_indent_add(x)
#define __DBGINDENTMORE()  debug_indent_add(2)
#define __DBGINDENTLESS()  debug_indent_add(-2)
#define __DBGPRINTINDENT(token) __DBGMSGTL((token, "%s", __DBGINDENT()))

#define __DBGDUMPHEADER(token,x) \
        __DBGPRINTINDENT(token), \
        debugmsg(token,x), \
        __DBGINDENTMORE()

#define __DBGDUMPSETUP(token,buf,len) \
        __DBGTRACE, \
        __DBGMSGHEXTLI((token,buf,len)), \
        debugmsg(token,"\n"), \
        __DBGPRINTINDENT(token)

/******************* End   private macros ************************/
/*****************************************************************/

/*****************************************************************/
/********************Start public  macros ************************/

#define DEBUGMSG(x)        do {if (_DBG_IF_) {debugmsg x;} }while(0)
#define DEBUGMSGT(x)       do {if (_DBG_IF_) {__DBGMSGT(x);} }while(0)
#define DEBUGTRACE         do {if (_DBG_IF_) {__DBGTRACE;} }while(0)
#define DEBUGMSGL(x)       do {if (_DBG_IF_) {__DBGMSGL(x);} }while(0)
#define DEBUGMSGTL(x)      do {if (_DBG_IF_) {__DBGMSGTL(x);} }while(0)
#define DEBUGMSGOID(x)     do {if (_DBG_IF_) {__DBGMSGOID(x);} }while(0)
#define DEBUGMSGHEX(x)     do {if (_DBG_IF_) {__DBGMSGHEX(x);} }while(0)
#define DEBUGMSGHEXTLI(x)  do {if (_DBG_IF_) {__DBGMSGHEXTLI(x);} }while(0)
#define DEBUGINDENT()      do {if (_DBG_IF_) {__DBGINDENT();} }while(0)
#define DEBUGINDENTADD(x)  do {if (_DBG_IF_) {__DBGINDENTADD(x);} }while(0)
#define DEBUGINDENTMORE()  do {if (_DBG_IF_) {__DBGINDENTMORE();} }while(0)
#define DEBUGINDENTLESS()  do {if (_DBG_IF_) {__DBGINDENTLESS();} }while(0)
#define DEBUGPRINTINDENT(token) \
	do {if (_DBG_IF_) {__DBGPRINTINDENT(token);} }while(0)


#define DEBUGDUMPHEADER(token,x) \
	do {if (_DBG_IF_) {__DBGDUMPHEADER(token,x);} }while(0)

#define DEBUGDUMPSETUP(token,buf,len) \
	do {if (_DBG_IF_) {__DBGDUMPSETUP(token,buf,len);} }while(0)

#else /* SNMP_NO_DEBUGGING := enable streamlining of the code */

#define DEBUGMSG(x)
#define DEBUGMSGT(x)
#define DEBUGTRACE
#define DEBUGMSGL(x)
#define DEBUGMSGTL(x)
#define DEBUGMSGOID(x)
#define DEBUGMSGHEX(x)
#define DEBUGIF(x)        if(0)
#define DEBUGDUMP(t,b,l,p)
#define DEBUGINDENT()
#define DEBUGINDENTMORE()
#define DEBUGINDENTLESS()
#define DEBUGINDENTADD(x)
#define DEBUGMSGHEXTLI(x)
#define DEBUGPRINTINDENT(token)
#define DEBUGDUMPHEADER(token,x)
#define DEBUGDUMPSETUP(token, buf, len)

#endif

#define MAX_DEBUG_TOKENS 256
#define MAX_DEBUG_TOKEN_LEN 128
#define DEBUG_TOKEN_DELIMITER ","
#define DEBUG_ALWAYS_TOKEN "all"

/*
  setup routines:
  
  debug_register_tokens(char *):     registers a list of tokens to
                                     print debugging output for.

  debug_is_token_registered(char *): returns SNMPERR_SUCCESS or SNMPERR_GENERR
                                     if a token has been registered or
                                     not (and debugging output is "on").
  snmp_debug_init(void):             registers .conf handlers.
*/
void debug_register_tokens(char *tokens);
int debug_is_token_registered(const char *token);
void snmp_debug_init(void);

/* provided for backwards compatability.  Don't use these functions. */
#if HAVE_STDARG_H
void DEBUGP (const char *, ...);
#else
void DEBUGP (va_alist);
#endif
void DEBUGPOID(oid *, size_t);
void snmp_set_do_debugging (int);
int snmp_get_do_debugging (void);
int debug_is_token_registered(const char *token);

#ifdef __cplusplus
}
#endif

#endif /* SNMP_DEBUG_H */
