#ifndef _MSG_OUTPUT_FN_
#define _MSG_OUTPUT_FN_

/*++
/* NAME
/*	msg_output 3h
/* SUMMARY
/*	diagnostics output management
/* SYNOPSIS
/*	#include <msg_output.h>
/* DESCRIPTION

 /*
  * System library.
  */
#include <stdarg.h>

 /*
  * External interface. Severity levels are documented to be monotonically
  * increasing from 0 up to MSG_LAST.
  */
typedef void (*MSG_OUTPUT_FN) (int, const char *, void *);
extern void msg_output_push(MSG_OUTPUT_FN, void *);
extern void msg_output_pop(MSG_OUTPUT_FN, void *);
extern void PRINTFLIKE(2, 3) msg_printf(int, const char *,...);
extern void msg_vprintf(int, const char *, va_list);

#define MSG_INFO	0		/* informative */
#define	MSG_WARN	1		/* warning (non-fatal) */
#define MSG_ERROR	2		/* error (fatal) */
#define MSG_FATAL	3		/* software error (fatal) */
#define MSG_PANIC	4		/* software error (fatal) */

#define MSG_LAST	4		/* highest-numbered severity level */

/* LICENSE
/* .ad
/* .fi
/*	The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/*	Wietse Venema
/*	IBM T.J. Watson Research
/*	P.O. Box 704
/*	Yorktown Heights, NY 10598, USA
/*
/*	Wietse Venema
/*	Google, Inc.
/*	111 8th Avenue
/*	New York, NY 10011, USA
/*--*/

#endif
