Table of Contents
Jump
Description
Jumps to any location in a file. If you use ”E” as the second parameter, Jump will seek to the end of the file.
Note
If the file is opened for writing, the Jump command will automatically extend the file if addr specified is larger than the file size. This is useful for pre-allocating a file to reduce delays during writing.
Important
If the file is extended, the data beyond the end of the file is undefined, so care must be taken to ensure your data is terminated properly.
You can use this command in junction with the Truncate command to pre-allocate then truncate the file.
Format
J fh addr|E
Parameters
fhis a file handle (1 - 4). Use the Free Handle command to get a free file handle.
addris the position to which you want to jump/seek.Ecan be used to jump to the end of the file.
Response Format
NULL | Enn
Example
To jump to byte position 2000 in file handle 1:
J 1 2000
To jump to the end of file handle 2:
J E 2
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