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/*
TiMidity++ -- MIDI to WAVE converter and player
Copyright (C) 1999-2002 Masanao Izumo <mo@goice.co.jp>
Copyright (C) 1995 Tuukka Toivonen <tt@cgs.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU 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
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
/*
dynamic_c.c
Dynamic loading control mode
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#ifndef NO_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include "timidity.h"
#include "common.h"
#include "output.h"
#include "controls.h"
#include "dlutils.h"
static int ctl_open(int using_stdin, int using_stdout);
static void ctl_close(void);
extern char *dynamic_interface_module(int id);
static void ctl_event(){} /* Do nothing */
static int cmsg(int type, int verbosity_level, char *fmt, ...);
static void *libhandle;
static void (* ctl_close_hook)(void);
ControlMode dynamic_control_mode =
{
"Dynamic interface", 0,
1,0,0,0,
ctl_open, ctl_close, NULL, NULL, cmsg, ctl_event,
};
static int cmsg(int type, int verbosity_level, char *fmt, ...)
{
va_list ap;
if ((type==CMSG_TEXT || type==CMSG_INFO || type==CMSG_WARNING) &&
dynamic_control_mode.verbosity<verbosity_level)
return 0;
va_start(ap, fmt);
if (!dynamic_control_mode.opened)
{
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
}
else
{
vfprintf(stdout, fmt, ap);
fprintf(stdout, "\n");
}
va_end(ap);
return 0;
}
static int ctl_open(int using_stdin, int using_stdout)
{
ControlMode *(* inferface_loader)(void);
char *path;
char buff[256];
int id;
if(dynamic_control_mode.opened)
return 0;
dynamic_control_mode.opened = 1;
id = dynamic_control_mode.id_character;
path = dynamic_interface_module(id);
if(path == NULL)
{
fprintf(stderr, "FATAL ERROR: dynamic_c.c: ctl_open()\n");
exit(1);
}
if((libhandle = dl_load_file(path)) == NULL)
return -1;
sprintf(buff, "interface_%c_loader", id);
if((inferface_loader = (ControlMode *(*)(void))
dl_find_symbol(libhandle, buff)) == NULL)
return -1;
ctl = inferface_loader();
ctl->verbosity = dynamic_control_mode.verbosity;
ctl->trace_playing = dynamic_control_mode.trace_playing;
ctl->flags = dynamic_control_mode.flags;
ctl_close_hook = ctl->close;
ctl->close = dynamic_control_mode.close; /* ctl_close() */
return ctl->open(using_stdin, using_stdout);
}
static void ctl_close(void)
{
if(ctl_close_hook)
{
ctl_close_hook();
dl_free(libhandle);
ctl_close_hook = NULL;
}
}
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