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package t_template;
use strict;
use vars qw(@ISA @EXPORT_OK);
@ISA=();
@EXPORT_OK= qw(init setparm output);
sub init { # (\@parms, \%defaults, \@template)
my ($self, $parms, $defs, $templatelines) = @_;
$self->{parms} = { };
$self->{values} = { };
my $key;
foreach $key (@$parms) {
$self->{parms}{$key} = 1;
}
foreach $key (keys %$defs) {
$self->{values}{$key} = ${$defs}{$key};
}
if (defined($templatelines)) {
$self->{template} = join "", @$templatelines;
}
}
sub validateparm { # (parmname)
no strict 'refs';
my ($self, $parmname) = @_;
if (!defined($self->{parms}{$parmname})) {
die "unknown parameter $parmname";
}
}
sub setparm { # (parm, value)
my ($self, $parm, $value) = @_;
$self->validateparm($parm);
$self->{values}{$parm} = $value;
}
sub substitute { # (text)
my ($self, $text) = @_;
my ($p);
# Do substitutions.
foreach $p (keys %{$self->{parms}}) {
if (!defined $self->{values}{$p}) {
die "$0: No value supplied for parameter $p\n";
}
# XXX More careful quoting of supplied value!
$text =~ s|<$p>|$self->{values}{$p}|g;
}
return $text;
}
sub output { # (fh)
my ($self, $fh) = @_;
print $fh "/* start of ", ref($self), " template */\n";
print $fh $self->substitute($self->{template});
print $fh "/* end of ", ref($self), " template */\n";
}
1;
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