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/*
/osxptb/trunk/PsychSourceGL/Source/OSX/Eyelink/EyelinkGetNextDataType.c
PROJECTS: Eyelink
AUTHORS:
f.w.cornelissen@rug.nl fwc
E.Peters@ai.rug.nl emp
PLATFORMS: Currently only OS X
HISTORY:
29/05/2001 emp created it (OS9 version)
30/10/06 fwc Adapted from early alpha version.
TARGET LOCATION:
Eyelink.mexmac resides in:
PsychHardware/EyelinkToolbox
*/
#include "PsychEyelink.h"
static char useString[] = "type = Eyelink('GetNextDataType')";
static char synopsisString[] =
" returns item type of next queue item"
" SAMPLE_TYPE if sample, 0 if none, else event code";
static char seeAlsoString[] = "";
/*
ROUTINE: EyelinkGetNextDataType
PURPOSE:
uses INT16 CALLTYPE eyelink_get_next_data(NULL);
just returns item type of next queue item
SAMPLE_TYPE if sample, 0 if none, else event code*/
PsychError EyelinkGetNextDataType(void)
{
int type = 0;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check to see if the user supplied superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(0));
PsychErrorExit(PsychRequireNumInputArgs(0));
PsychErrorExit(PsychCapNumOutputArgs(1));
// Verify eyelink is up and running
EyelinkSystemIsConnected();
EyelinkSystemIsInitialized();
type = eyelink_get_next_data(NULL);
PsychCopyOutDoubleArg(1, TRUE, type);
return(PsychError_none);
}
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