Event Compile.GetVarSize

<sidebar>Event Contents</sidebar> Sent to a component to amend the size of the expected array

This event is part of the Compile class

Parameters

STRING VarName

The original Flowcode variable

ULONG Elements

The number of elements in the array

This parameter is returned back to Flowcode

Return value

ULONG The return of this event is currently unused

Detailed description

No additional information

Examples

On some microcontroller devices there are sometimes limitation on the size of a single data array or other reasons to adjust the size of a variable based on a set of parameters etc.

For example if we try and create an array of size bigger then 256 bytes then this will cause a compilation error.

#define FCVsz_DATAARRAY 500

GetVarSize.c(53): error: total number of array elements can not exceed 0x100

By enabling the GetVarSizeevent we can override the number of elements in the array.

Inside the event macro we check for the name of the variable with the size we want to override and overwrite the .Elements local variable to edit the array size.

After saving the project and refreshing the C code window the variable now looks like this.

#define FCVsz_DATAARRAY 255

And during compilation we now get this.

success

Here is the file as a demonstration.

Get Var Size Event Example