Difference between revisions of "Fwrite"

Latest revision as of 08:51, 26 January 2009

Writes text or the specified binary variable to the file.

/fwrite [-bn] <name> <text | &binvar>

Explanation of the switches:

Notes

• The file handler must be opened before using /fwrite.
• When the file handler is first opened the pointer is at the end of the file so any /fwrite's upon opening the file handler will be appended to the file.
• When writing to the file handler you're never inserting data, you're overwriting data unless the data you're writing at the pointer exceeds the end of the file.

If you have a file containing this data below opened in a file handler called test:

A duck goes quack
Dogs go woof
Fish go moo
Dana is silent but deadly

And you issue the command:

/fseek test -l 1
/fwrite -n test Ducks go quack

You will end up with a file containing:

Ducks go quack
k
Dogs go woof
Fish go moo
Dana is silent but deadly

The reason for this is /fwrite overwrites the same amount of data (unless exceeding the end of the file) from the file handler that you're writing (plus two if you issue -n for the $crlf)

A duck goes qu ac     k<crlf>
Ducks go quack <crlf>

The data, A duck goes qu is overwritten with Ducks go quack the original ac is overwritten with the <crlf> from the -n switch leaving the k<crlf> that was already there previously.

Example

/fwrite moo moo!

This will just add moo! to the end of the file assigned to the name moo.

/fwrite -n moo moo!

This will add moo! and a $crlf to the end of the file assigned to the name moo.

/fwrite -b moo &moo

This will add the content of the Binary Variable &moo to the end of the file assigned to the name moo.