jack2/common/varargs.h

/*
*  Copyright (C) 2004 Jack O'Quin
*
*  This program is free software; you can redistribute it and/or modify
*  it under the terms of the GNU Lesser General Public License as published by
*  the Free Software Foundation; either version 2.1 of the License, or
*  (at your option) any later version.
*
*  This program is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU Lesser General Public License for more details.
*
*  You should have received a copy of the GNU Lesser General Public License
*  along with this program; if not, write to the Free Software
*  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/

#ifndef __jack_varargs_h__
#define __jack_varargs_h__

#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include "types.h"

#ifdef __cplusplus
extern "C"
{
#endif

    /* variable argument structure */
    typedef struct {
        char *server_name;              /* server name */
        char *load_name;                /* load module name */
        char *load_init;                /* initialization string */
        jack_uuid_t session_id;         /* requested session_id */
    }
    jack_varargs_t;

    static const char* jack_default_server_name (void)
    {
        const char *server_name;
        if ((server_name = getenv("JACK_DEFAULT_SERVER")) == NULL)
            server_name = "default";
        return server_name;
    }

    static inline void jack_varargs_init (jack_varargs_t *va)
    {
        memset (va, 0, sizeof(jack_varargs_t));
        va->server_name = (char*)jack_default_server_name();
    }

    static inline void jack_varargs_parse (jack_options_t options, va_list ap, jack_varargs_t *va)
    {
        // initialize default settings
        jack_varargs_init (va);

        if ((options & JackServerName)) {
            char *sn = va_arg(ap, char *);
            if (sn)
                va->server_name = sn;
        }
        if ((options & JackLoadName))
            va->load_name = va_arg(ap, char *);
        if ((options & JackLoadInit))
            va->load_init = va_arg(ap, char *);
        if ((options & JackSessionID)) {
            char *sid = va_arg(ap, char *);
            if (sid) {
                const long long id = atoll( sid );
                if (id > 0)
                    va->session_id = id;
            }
        }
    }

#ifdef __cplusplus
}
#endif

#endif /* __jack_varargs_h__ */