    /*====================================================================*
     *
     *   Copyright (c) 2013 Qualcomm Atheros, Inc.
     *   Copyright (c) 2013 I2SE GmbH
     *
     *   All rights reserved.
     *
     *   Redistribution and use in source and binary forms, with or
     *   without modification, are permitted (subject to the limitations
     *   in the disclaimer below) provided that the following conditions
     *   are met:
     *
     *   * Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     *
     *   * Redistributions in binary form must reproduce the above
     *     copyright notice, this list of conditions and the following
     *     disclaimer in the documentation and/or other materials
     *     provided with the distribution.
     *
     *   * Neither the name of Qualcomm Atheros nor the names of
     *     its contributors may be used to endorse or promote products
     *     derived from this software without specific prior written
     *     permission.
     *
     *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
     *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
     *   COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
     *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
     *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   signed slac_debug (struct session * session, signed status, char const * string, char const * format, ...);
     *
     *   slac.h
     *
     *   variation of the GNU error() function that accepts a message in
     *   place of an error code and always returns -1;
     *
     *--------------------------------------------------------------------*/

    #ifndef SLAC_DEBUG_SOURCE
    #define SLAC_DEBUG_SOURCE

    #include <stdio.h>
    #include <stdlib.h>
    #include <stdarg.h>
    #include <string.h>

    #include "../iso15118/slac.h"
    #include "../tools/types.h"
    #include "../tools/error.h"
    #include "../tools/flags.h"

    #ifdef __GNUC__

    __attribute__ ((format (printf, 4, 5)))

    #endif

    signed slac_debug (struct session * session, signed status, char const * string, char const * format, ...)

    {
    	extern char const * program_name;

    	if (_allclr (session->flags, SLAC_SILENCE))
    	{
    		if ((program_name) && (* program_name))
    		{
    			fprintf (stderr, "%s: ", program_name);
    		}
    		if ((string) && (* string))
    		{
    			fprintf (stderr, "%s: ", string);
    		}
    		if ((format) && (*format))
    		{
    			va_list arglist;
    			va_start (arglist, format);
    			vfprintf (stderr, format, arglist);
    			va_end (arglist);
    		}
    		fprintf (stderr, "\n");
    		fflush (stderr);
    	}
    	if (status)
    	{
    		exit (status);
    	}
    	return (-1);
    }

    #endif

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