get file size using handle

[orbs]

hello everyone,

so i need to get file size using only its handle as given by FileOpen(). i don't have the file name as string, so no go on FileGetSize().

trying _WinAPI_GetFileSizeEx(), i get an invalid handle error. _WinAPI_GetLastErrorMessage() says "The handle is invalid." the handle value as returned by FileOpen() is 1.

reproducer:

#include <WinAPIFiles.au3>
#include <WinAPIError.au3>

Global $hFile = FileOpen(@ScriptFullPath)
Global $iSize = _WinAPI_GetFileSizeEx($hFile)
ConsoleWrite(_WinAPI_GetLastErrorMessage() & @CRLF)
ConsoleWrite($hFile & ' : ' & $iSize & @CRLF)
FileClose($hFile)

any ideas?

 

[Jos]

The returned $hFile from FileOpen() is not the real filehandle but rather a sequence number, so won't work with the _WinAPI call.
...  but when you do the FIleOpen() is guess you do know the actual filename, so am puzzled about your comment not knowing the filename?

Jos

[pixelsearch]

@orbs: I tried it that way :

$hFile = FileOpen("autoit-v3.3.15.3.zip")
FileSetPos($hFile, 0, $FILE_END)
ConsoleWrite(FileGetPos($hFile) & @lf)

It displayed 17490098 which is the correct size (as shown in Explorer)

[orbs]

thank you @pixelsearch, your method works.

@Jos, the function i'm writing is inside a UDF, working with FileOpen() that is called by the main script. i cannot tell in advance what usage the main script is going to do with my UDF and i don't want to force the main script to pass the file name as string to my UDF.