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#include "StdAfx.h"
char useGetNumBalls[] = "numBalls = JOYSTICK(joystickNumber,'GetNumBalls')";
char synopsisGetNumBalls[] = "Given a joystick number return the number of balls "
"on the joystick. You can then use JOYSTICK 'GetBall' to find the state of a ball. ";
void JOYSTICKGetNumBalls(int nlhs, mxArray *plhs[], int nrhs, CONSTmxArray *prhs[])
{
ProjectTable *joystickTable=GetProjectTable();
int numSticks;
CONSTmxArray *numArg;
double stickNum;
SDL_Joystick *pStick;
prhs;
if(joystickTable->giveHelp){GiveHelp(useGetNumBalls,synopsisGetNumBalls);return;}
numArg = joystickTable->joystickNumberArgument;
if(numArg == NULL || nlhs > 1 || nrhs > 0 || !mxIsDouble(numArg) || (mxGetM(numArg) * mxGetN(numArg) != 1))
GiveUsageExit(useGetNumBalls);
numSticks = SDL_NumJoysticks();
stickNum = mxGetPr(numArg)[0];
if(stickNum > numSticks)
PrintfExit("The joystick number %d passed to JOYSTICK 'GetNumBalls' exceeds the number of joysticks, %d",stickNum,numSticks);
if(stickNum < 1)
PrintfExit("The joystick number passed to JOYSTICK 'GetNumBalls' must be greater than 0");
pStick = GetJoystickObjFromNum((int)stickNum-1);
if(pStick == NULL)
PrintfExit("JOYSTICK 'GetNumBalls' can not open joystick number %d",stickNum);
plhs[0] = mxCreateDoubleMatrix(1,1,mxREAL);
mxGetPr(plhs[0])[0] = SDL_JoystickNumBalls(pStick);
}
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