state-object.h
#ifndef _dryos_state_object_h_
#define _dryos_state_object_h_
/** \file
* DryOS finite-state machine objects.
*/
/*
* Copyright (C) 2009 Trammell Hudson <hudson+ml@osresearch.net>
*
* 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.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "compiler.h"
/** State objects.
*
* Size 0x20
*/
typedef struct state_object * (*state_transition_function_t)(
void * x,
void * y,
void * z,
void * w
);
struct state_transition
{
uint32_t next_state;
state_transition_function_t state_transition_function;
};
struct state_object
{
const char * type; // off 0x00, "StateObject"
const char * name; // off 0x04, arg 0
uint32_t auto_sequence; // off 0x08, arg 1
// off 0x0c, always 0xff99a228 ?
void (*StateTransition_maybe)(
struct state_object * self,
void * x,
uint32_t input,
void * z,
void * t
);
// Points to an array of size [max_inputs][max_states]
struct state_transition * state_matrix; // off 0x10
uint32_t max_inputs; // off 0x14, arg 2
uint32_t max_states; // off 0x18, arg 3
uint32_t current_state; // off 0x1c, initially 0
};
SIZE_CHECK_STRUCT( state_object, 0x20 );
#define STATE_FUNC(stateobj,input,state) stateobj->state_matrix[(state) + (input) * stateobj->max_states].state_transition_function
/* waits for N LiveView frames (using state object vsync) */
int wait_lv_frames(int num_frames);
#endif