/*
 * =====================================================================================
 *
 * Filename: state.c
 *
 * Description:
 *
 * Version: 1.0
 * Created: 2017年08月08日 08时48分35秒
 * Last Modified: 2021年02月07日 14:10:13
 * Revision: none
 * Compiler: gcc
 *
 * Author: zt (),
 * Organization:
 *
 * =====================================================================================
 */

#include <stdio.h>

typedef unsigned char State;
typedef State ( *Procedure ) ( void* );

enum states
{
 s_init,
 s_count,
 s_done,
 s_default,
};

typedef struct
{
 int cnt;
} SM_VAR;

State step_init ( void* arg )
{
 SM_VAR* p = ( SM_VAR* ) arg;
 p->cnt = 0;
 printf ( "CS:init; cnt=%d; NS:count\n", p->cnt );
 return s_count;
}

State step_count ( void* arg )
{
 SM_VAR* p = ( SM_VAR* ) arg;

 if ( p->cnt < 3 )
 {
 p->cnt += 1;
 printf ( "CS:count; cnt=%d; NS:count\n", p->cnt );
 return s_count;
 }
 else
 {
 printf ( "CS:count; cnt=%d; NS:done\n", p->cnt );
 return s_done;
 }
}

State step_done ( void* arg )
{
 SM_VAR* p = ( SM_VAR* ) arg;
 printf ( "CS:init; cnt=%d; NS:init\n", p->cnt );
 return s_init;
}

State step_default ( void* arg )
{
 ( void ) arg;
 //SM_VAR* p = ( SM_VAR* ) arg;
 printf ( "Wrong State\n" );
 return s_init;
}

Procedure Steps[] =
{
 step_init,
 step_count,
 step_done,
 step_default,
};

void BestStateMachine ( void* invar )
{
 static State NS = s_init;
 NS = Steps[NS] ( invar );
}

int main ( int argc, char* argv[] )
{
 ( void ) argc;
 ( void ) argv;

 SM_VAR var;

 int i;

 for ( i = 0 ; i < 8; ++i )
 {
 BestStateMachine ( &var );
 }

 return 0;
}