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#include "StdAfx.h"
char useGetButton[] = "buttonState = JOYSTICK(joystickNumber,'GetButton',buttonNumber)";
char synopsisGetButton[] = "Given a joystick number and a button number, return the immediate "
"state of the specified button on the specified joystick. Use 'GetNumJoysticks' "
"and 'GetNumButtons' to determine maximum legal values for joystickNumber and buttonNumber arguments. "
"The first joystick and the first button are number 1. It is an error to call 'GetButton' if the "
"specified joystick has no buttons.";
void JOYSTICKGetButton(int nlhs, mxArray *plhs[], int nrhs, CONSTmxArray *prhs[])
{
ProjectTable *joystickTable=GetProjectTable();
int numSticks, numButtons, fetchedButton;
CONSTmxArray *numArg;
double stickNum;
SDL_Joystick *pStick;
if(joystickTable->giveHelp){GiveHelp(useGetButton,synopsisGetButton);return;}
numArg = joystickTable->joystickNumberArgument;
if(numArg == NULL || nlhs > 1 || nrhs > 1 || nrhs < 1 || !mxIsDouble(numArg) || (mxGetM(numArg) * mxGetN(numArg) != 1 ||
!mxIsDouble(prhs[0]) || (mxGetM(prhs[0]) * mxGetN(prhs[0])) != 1)){
GiveUsageExit(useGetButton);
}
numSticks = SDL_NumJoysticks();
stickNum = mxGetPr(numArg)[0];
if(stickNum > numSticks)
PrintfExit("The joystick number %d passed to JOYSTICK 'GetButton' exceeds the number of joysticks, %d",stickNum,numSticks);
if(stickNum < 1)
PrintfExit("The joystick number passed to JOYSTICK 'GetButton' must be greater than 0");
pStick = GetJoystickObjFromNum((int)stickNum-1);
if(pStick == NULL)
PrintfExit("JOYSTICK 'GetButton' can not open joystick number %d",stickNum);
numButtons = SDL_JoystickNumButtons(pStick);
fetchedButton = (int)mxGetPr(prhs[0])[0];
if(fetchedButton > numButtons || fetchedButton < 0)
PrintfExit("The button number %d passed to JOYSTICK 'GetButton' is oustide the allowable range",fetchedButton);
plhs[0] = mxCreateDoubleMatrix(1,1,mxREAL);
SDL_JoystickUpdate();
mxGetPr(plhs[0])[0] = SDL_JoystickGetButton(pStick, fetchedButton-1);
}
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