FileSizeEx and Integer Math

Keywords: 	  FileSizeEx and integer math

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Question:

Maybe I'm hitting a max-int or something, but I'm kinda confused.

When I do this:

FILE_SIZES=FileSizeEx(strcat(CD_PATH,"*.*"))

FREE_SPACE=2851000000-FILE_SIZES
DISP_SIZE=((FILE_SIZES / 1000) / 1000)
DISP_SIZE=strcat(DISP_SIZE," MB")

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FREE_SPACE returns a positive number.
2146681977 or 2.14 gig

the FILE_SIZES is actually 704 mb
704318023

However, if I go over 2.85 gig minus File_Sizes, it returns a negative number.

FREE_SPACE=2900000000-FILE_SIZES

returns -2099285319

What am I missing here ?

Answer:

You are doing integer math, and the largest integer WinBatch can handle is about 2.1 billion. You are going over that to 2.85 billion.

Simple fix...Add the Decimals(0) and the .0 to your big number.

And you might want to change your divisor as indicated to match windows.

Decimals(0)
FILE_SIZES=FileSizeEx(strcat(CD_PATH,"*.*"))
FREE_SPACE=2851000000.0-FILE_SIZES
DISP_SIZE=((FILE_SIZES / 1000) / 1024)
DISP_SIZE=strcat(DISP_SIZE," MB")

So basically use a real instead of an int.

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Article ID:   W15150