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/*
/osxptb/trunk/PsychSourceGL/Source/OSX/Eyelink/EyelinkOpenFile.c
PROJECTS: Eyelink
AUTHORS:
f.w.cornelissen@rug.nl fwc
E.Peters@ai.rug.nl emp
PLATFORMS: Currently only OS X
HISTORY:
18/10/02 fwc removed superfluous message when succesfully opening file
15/06/06 fwc Adapted from early alpha version by emp.
TARGET LOCATION:
Eyelink.mexmac resides in:
EyelinkToolbox
*/
#include "PsychEyelink.h"
static char useString[] = "[status =] Eyelink('OpenFile', filename [, dontOpenExisting=0])";
static char synopsisString[] =
"Opens an EDF file 'filename' on the tracker computer, closes any existing file.\n"
"If the optional flag 'dontOpenExisting' is set to a non-zero value, then the file "
"is only opened, and thereby created, if it doesn't already exist. Otherwise the function "
"aborts with an error.\n"
"Returns 0 if success, else error code" ;
static char seeAlsoString[] = "";
/*
ROUTINE: EyelinkOpenFile
PURPOSE:
uses INT16 open_data_file(char *name);
Opens an EDF file on tracker hard disk, closes any existing file
Returns 0 if success, else error code */
PsychError EyelinkOpenFile(void)
{
int iOpenFileStatus = -1;
int dontOpenExisting = 0;
char *filename;
//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(2));
PsychErrorExit(PsychRequireNumInputArgs(1));
PsychErrorExit(PsychCapNumOutputArgs(1));
// Verify eyelink is up and running
EyelinkSystemIsConnected();
EyelinkSystemIsInitialized();
PsychAllocInCharArg(1, TRUE, &filename);
// Should we only open new files, not open - and overwrite - existing ones?
if (PsychCopyInIntegerArg(2, FALSE, &dontOpenExisting) && dontOpenExisting) {
// Yes. Check if file already exists, abort with error if so:
if (file_exists(filename) != 0) {
printf("Eyelink openfile: The EDF file '%s' already exists and i was asked to abort in this case, so i'll abort.\n", filename);
PsychErrorExitMsg(PsychError_user, "Tried to open already existing EDF file and user asked to not do that, so i abort.");
}
}
iOpenFileStatus = open_data_file(filename);
if (iOpenFileStatus!=0)
mexPrintf("Eyelink openfile: Cannot create EDF file '%s' errorcode : %d\n", filename, iOpenFileStatus);
/* if there is an output variable available, assign iOpenFileStatus to it. */
PsychCopyOutDoubleArg(1, FALSE, iOpenFileStatus);
return(PsychError_none);
}
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