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__END__
=head1 Random Notes on Irssi Internals.
=head2 Display Output
Irssi has to deal with a whole bunch of things between a script print() and actually
putting it on the screen.
Some of these things are:
=over 4
=item Message Levels
=item Abstract Replacements
=item Theme formats
=item Module (C</format>) formats
=back
==head3 Message Levels
Message levels are defined in F<src/core/levels.h> and some
support functions in F<src/core/levels.c>
We have:
=over 4
=item C<int level_get(str level)>
Special cases: C<ALL, *> both return MSGLEVEL_ALL, and C<NEVER> returns 0.
The remainder are looked up in a big static string array by name to
find the appropriate numeric level. Partial matches are permitted as
long as they are unambigious.
=item C<int level2bits(str level, int *errorp)>
=item C<str bits2level(int bits)>
=item C<int combine_level(int dest, str src)>
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