File Statements
File Commands
| | open | | open a file
|
| | close | | close a file
|
| | put | | write alphanumeric text to a file
|
| | get | | read alphanumeric text from a file
|
| | write | | binary write to a file
|
| | read | | binary read from a file
|
| | seek | | move to a specified position in a file
|
| | tell | | report the current file position
|
| | eof | | check for end of file
|
File Command Syntax
open : streamNo, fileName, ioCapability {, ioCapability }
| | ioCapability is one of get, put, read, write, seek, mod
|
| | | put or write capability will cause any existing file
to be truncated to zero length unless the mod
capability is also specified.
|
| | | seek capability is needed to use seek or tell
commands.
|
close : streamNo
get : streamNo , getItem { , getItem }
put : streamNo , putItem { , putItem }
read : streamNo [ : fileStatus ] , readItem { , readItem }
write : streamNo[ : fileStatus ] , writeItem {, writeItem }
seek : streamNo , filePosition or seek : streamNo , *
tell : streamNo , filePositionVar
eof ( streamNo ) : boolean (This is a function)
Appending to a Text File
% Open the file for put, but do not erase it
open : streamNo, fileName, put { , get }, mod
% Move the file pointer to the end of the file
seek : streamNo, *