FREEFILE

FREEFILE

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Action

Returns a free Filenumber.

 

 

Syntax

bFileNumber = FREEFILE()

 

 

Remarks

bFileNumber

A byte variable , which can be used for opening next file

 

 

This function gives you a free file number, which can be used for file – opening statements. In contrast to VB this file numbers start with 128 and goes up to 255. Use range 1 to 127 for user defined file numbers to avoid file number conflicts with the system numbers from FreeFile()

 

This function is implemented for compatility with VB.

 

 

See also

INITFILESYSTEM , OPEN , CLOSE, FLUSH , PRINT, LINE INPUT, LOC, LOF , EOF , FILEATTR , SEEK , BSAVE , BLOAD , KILL , DISKFREE , DISKSIZE , GET , PUT , FILEDATE , FILETIME , FILEDATETIME , DIR , FILELEN , WRITE , INPUT

 

 

ASM

Calls

_GetFreeFileNumber

 

Input

none

 

Output

r24: Filenumber

r25: Errorcode

 

C-Flag: Set on Error

 

 

 

Partial Example

Ff =Freefile()                                 ' get file handle

Open"test.txt" For Input As #ff         ' we can use a constant for the file too

Print Lof(#ff);" length of file"

Print Fileattr(#ff);" file mode"         ' should be 1 for input

Do

   LineInput #ff , S                         ' read a line

  ' line input is used to read a line of text from a file

  Print S ' print on terminal emulator

Loop UntilEof(ff)<> 0

'The EOF() function returns a non-zero number when the end of the file is reached

'This way we know that there is no more data we can read

Close #ff