LOC
Contents |
Action
Returns the position of last read or written Byte of the file
Syntax
lLastReadWritten = LOC (#bFileNumber)
Remarks
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bFileNumber |
(Byte) File number, which identifies an opened file |
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lLastReadWritten |
(Long) Variable, assigned with the Position of last read or written Byte (1-based) |
This function returns the position of the last read or written Byte. If an error occurs, 0 is returned. Check DOS-Error in variable gbDOSError. If the file position pointer is changed with the command SEEK, this function can not be used till the next read/write operation.
This function differs from VB. In VB the byte position is divided by 128.
See also
INITFILESYSTEM , OPEN , CLOSE, FLUSH , PRINT, LINE INPUT, LOF , EOF , FREEFILE , FILEATTR , SEEK , BSAVE , BLOAD ,KILL , DISKFREE , DISKSIZE , GET , PUT , FILEDATE , FILETIME , FILEDATETIME , DIR , FILELEN , WRITE , INPUT
ASM
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Calls |
_FileLoc |
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Input |
r24: filenumber |
X: Pointer to Long-variable, which gets th result |
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Output |
r25: Errorcode |
C-Flag: Set on Error |
Example
'open the file in BINARY mode Open "test.biN" For Binary As #2 Put #2 , B ' write a byte Put #2 , W ' write a word Put #2 , L ' write a long Ltemp = Loc(#2)+ 1 ' get the position of the next byte Print Ltemp ;" LOC"' store the location of the file pointer Print Lof(#2);" length of file" Print Fileattr(#2);" file mode"' should be 32 for binary Put #2 , Sn ' write a single Put #2 , Stxt ' write a string Flush #2 ' flush to disk Close #2
| Languages | English • Deutsch |
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