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- Subject: Re: File I/O, find line?
- From: duck <duck@...>
- Date: Wed, 12 Jan 2005 10:08:00 +0000
> What I would like to do is find if certain parameters are defined for
> different subsets. I am able to find my line range by locating the
> subset title and then the next blank line following it. I then want
> to find my matching parameter that falls inside that range. The way I
> would like to do this is with a function like so
> -- code here....
> if line_found then
> return line_number
> return nil
> The problem that I am running into is that the only file offset I have
> encountered is a character offset via file:seek("set", charOffset).
> Is there an easy way to offset directly to the lines I desire?
Can't you just dispense with the line numbers and file offsets altogether?
For each subset, create a table S with keys being the parameters and
values being the data. Then, for the whole config file, create a table T
with keys being the subset name and values being the relevant S table
above. See the code on p.49 of the Lua 5.0 Ref Man, which converts a
string of "param1=val1 param2=val2..." into a table.
You can use file:read("*a") to suck the whole config file into a string.