cadencii.winmmhelp.JoyInit C# (CSharp) Method

        public static int JoyInit() {
            if ( s_initialized ) {
                JoyReset();
            }
            s_initialized = true;
            int num_joydev = (int)win32.joyGetNumDevs();
#if DEBUG
            cadencii.debug.push_log( "winmmhelp.JoyInit" );
            cadencii.debug.push_log( "    num_joydev=" + num_joydev );
#endif
            if ( num_joydev <= 0 ) {
                num_joydev = 0;
                return num_joydev;
            }
            s_joy_attatched = new boolean[num_joydev];
            s_joycaps = new JOYCAPSW[num_joydev];
            int count = 0;
            for ( int k = 0; k < num_joydev; k++ ) {
                JOYINFO ji = new JOYINFO();
                if ( win32.joyGetPos( (uint)k, ref ji ) == win32.JOYERR_NOERROR ) {
                    s_joy_attatched[k] = true;
                    JOYCAPSW jc = new JOYCAPSW();
                    win32.joyGetDevCapsW( (uint)k, ref jc, (uint)Marshal.SizeOf( jc ) );
                    s_joycaps[k] = jc;
                    count++;
                } else {
                    s_joy_attatched[k] = false;
                }
            }
            if ( count > 0 ) {
                s_joy_available = new int[count];
                int c = -1;
                for ( int i = 0; i < num_joydev; i++ ) {
                    if ( s_joy_attatched[i] ) {
                        c++;
                        if ( c >= count ) {
                            break; //ここに来るのはエラー
                        }
                        s_joy_available[c] = i;
                    }
                }
            }
            s_num_joydev = (uint)count;
            return (int)s_num_joydev;
        }