/*
  Copyright 2007-2011 David Robillard <http://drobilla.net>

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.

  2. 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.

  THIS SOFTWARE IS PROVIDED ``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
  AUTHOR 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.
*/

#ifndef SUIL_INTERNAL_H
#define SUIL_INTERNAL_H

#include <assert.h>
#include <stdlib.h>

#include <dlfcn.h>

#include "suil/suil.h"

#define SUIL_ERRORF(fmt, ...) fprintf(stderr, "error: %s: " fmt, \
                                      __func__, __VA_ARGS__)

struct _SuilInstance {
	void*                   lib_handle;
	const LV2UI_Descriptor* descriptor;
	LV2UI_Handle            handle;
	LV2UI_Widget            ui_widget;
	LV2UI_Widget            host_widget;
};

/** Type of a module's suil_wrap_init function.
 * This initialisation function must be called before instantiating any
 * UI that will need to be wrapped by this wrapper (e.g. it will perform any
 * initialisation required to create a widget for the given toolkit).
 */
typedef int (*SuilWrapInitFunc)(const char*               host_type_uri,
                                const char*               ui_type_uri,
                                const LV2_Feature* const* features);


typedef int (*SuilWrapFunc)(const char*  host_type_uri,
                            const char*  ui_type_uri,
                            SuilInstance instance);

typedef void (*SuilVoidFunc)();

/** dlsym wrapper to return a function pointer (without annoying warning) */
static inline SuilVoidFunc
suil_dlfunc(void* handle, const char* symbol)
{
	typedef SuilVoidFunc (*VoidFuncGetter)(void*, const char*);
	VoidFuncGetter dlfunc = (VoidFuncGetter)dlsym;
	return dlfunc(handle, symbol);
}

#endif  // SUIL_INTERNAL_H