Gamma™ : Version 6.4
	Input/Output

`seek`

seek — sets the file position for reading or writing.

Syntax

seek (file, offset, where)

Arguments

file

A file pointer to a previously opened file. This may be either a file in the file system, or a string opened for read and write.

offset

An integer specifying the number of characters into the file, starting from where.

where

A starting point, indicated by a number:

0 Beginning of the file.

1 Current position in the file.

2 End of the file.

Returns

t if successful, nil if unsuccessful.

Description

This function lets you specify a position in a file to start reading or writing.

Example

The file "myseekfile" contains the following:

Now is the time for all good men and women
to come to the aid of their world.

Gamma> msk = open("myseekfile.dat", "r",nil);
#<File:"myseekfile.dat">
Gamma> seek(msk, 5, 0);
t
Gamma> read_line(msk);
"s the time for all good men and women"
Gamma> seek(msk, 2, 1);
t
Gamma> read_line(msk);
" come to the aid of their world."
Gamma> seek(msk, -15, 2);
t
Gamma> read_line(msk);
"of their world."
Gamma> seek(msk, -3, 0);
nil
Gamma>


read_until		ser_setup

seek