Node:Extend, Next:Extended, Previous:exports, Up:Reference
(Under construction.)
procedure Extend (var F: any_file; [FileName: String;] [BlockSize: Cardinal]);
Extend
opens a file for writing. If the file does not
exist, it is created. If it does exist, the file pointer is
positioned after the last element.
Like Rewrite
, Reset
and Append
do,
Extend
accepts an optional second and third parameter for the
name of the file in the filesystem and, for untyped files, the block
size of the file. (For details, see Rewrite.)
Extend
is an ISO 10206 Extended extension. Borland Pascal
has Append instead.
The BlockSize
parameter is a Borland Pascal extension.
The FileName
parameter is a GNU Pascal extension.
program ExtendDemo; var Sample: Text; begin Assign (Sample, 'sample.txt'); Rewrite (Sample); WriteLn (Sample, 'Hello, World!'); { `sample.txt' now has one line } Close (Sample); { ... } Extend (Sample); WriteLn (Sample, 'Hello again!'); { `sample.txt' now has two lines } Close (Sample) end.