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executable file 117 lines (97 sloc) 2.48 KB
#!/usr/bin/perl
#
# Notes.pm
# $Id: Notes.pm,v 1.9 2010/06/20 18:31:22 johnh Exp $
#
# Copyright (C) 1996-2006,2012 Free Software Foundation, Inc.
# Comments to <johnh@isi.edu>.
#
# This file is under the Gnu Public License, version 2.
# For details see the COPYING which accompanies this distribution.
#
#
# A Perl module implement a notes class.
#
require 5.000;
package Notes;
use Carp;
use strict;
#----------------------------------------------------------------------
# my($Notes::revsion) = '$Id: Notes.pm,v 1.9 2010/06/20 18:31:22 johnh Exp $'; #' font-lock hack
# my($Notes::VERSION) = 1.00;
# public method
# optional argument: pathname to read
sub new {
my ($class, $file) = @_;
my $self = bless {};
if (defined($file)) {
$self->read_from_file($file);
} else {
$self->init();
};
return $self;
}
# public method
sub read_from_file {
my ($self, $filename) = @_;
$self->init();
open(FILE, "<$filename") || croak "Cannot open $filename";
my(@lines) = <FILE>;
close FILE;
my($i);
my($start, $Subject) = (0, undef);
my(%entries);
for ($i = 0; $i < $#lines; $i++) {
if ($lines[$i] =~ /^\* / &&
$lines[$i+1] =~ /^-+\r?$/) {
$self->push_entry($Subject, join("", @lines[$start .. $i-1]));
$start = $i;
($Subject) = ($lines[$i] =~ /^\*\s+(.*)\r?$/);
};
};
$i = $#lines + 1;
$self->push_entry($Subject, join("", @lines[$start .. $i-1]));
return 1;
}
# public_method
sub subjects {
my($self) = @_;
return $self->{'subjects'};
}
# public method
sub by_subject {
my($self, $Subject) = @_;
my($subject) = lc($Subject);
return wantarray ? () : undef
if (!defined($self->{'entryis_by_subject'}{$subject}));
my(@ret) = ();
foreach (@{$self->{'entryis_by_subject'}{$subject}}) {
push (@ret, $self->{'entries'}[$_]);
};
return @ret;
}
# public method
sub prelude {
my($self) = @_;
return $self->{'pre'};
}
# private method
sub push_entry {
my($self, $Subject, $entry) = @_;
if (!defined($Subject)) {
$self->{'pre'} = $entry;
return;
};
my($subject) = lc($Subject);
push (@{ $self->{'subjects'} }, $Subject);
push (@{ $self->{'entries'} }, $entry);
push (@{ $self->{'entryis_by_subject'}{$subject} }, $#{$self->{'entries'}});
}
# private method
sub init {
my($self) = @_;
# These inits break things. Go figure.
# @{ $self->{'subjects'} } = @{$self->{'entries'}} = ();
# %{ $self->{'entryis_by_subject'} } = ();
$self->{'pre'} = '';
}