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package DBIShell::Fixup;
# dbishell: A generic database shell based on the Perl DBI layer
# Copyright (C) 2000 Vivek Dasmohapatra (vivek@etla.org)
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
use strict;
use Exporter ();
use Getopt::Long;
use vars qw($VERSION @EXPORT @EXPORT_OK %EXPORT_TAGS @ISA);
$VERSION = 0.01_02;
@EXPORT = qw();
@EXPORT_OK = qw();
%EXPORT_TAGS = qw();
@ISA = qw(Exporter);
use constant FIXLIST =>
{
'Term::ReadLine::Perl' => *term_readline_perl ,
'Getopt::Long' => *getopt_long ,
};
# user-visible function:
sub patch ($)
{
my $patch;
my $target = $_[0];
if( $patch = (FIXLIST)->{$target} ) { $patch->() }
}
# FIXUP: Getopt::Long
# fixup for old versions (cf solaris 2.5/2.6 or so, iirc):
use constant GETOPT_WARNING =>
"Old version of Getopt::Long [%d] detected: trying to kludge it...\n";
sub getopt_long ()
{
if($::{'Getopt::'} && $::{'Getopt::'}{'Long::'})
{
my $sym_tab = $::{'Getopt::'}{'Long::'};
if(!exists($sym_tab->{Configure}))
{
warn(sprintf(GETOPT_WARNING, $Getopt::Long::VERSION));
if(exists($sym_tab->{config}))
{
$sym_tab->{Configure} = *{ $sym_tab->{config} };
}
}
}
}
# FIXUP: Term::ReadLine::Perl
# fix package so it meets the TIEHASH criteria: this is so we can access
# its attributes in a Term::ReadLine::Gnu compatible way:
package Term::ReadLine::Perl::Tie;
use vars qw(*DBISHELL_GLOB);
package DBIShell::Fixup;
TRL_PERL_PRIVATE:
{
my @rlh_keys = ();
sub _trl_perl_tie_firstkey
{
package Term::ReadLine::Perl::Tie;
my $symt;
if( $symt = $::{'readline::'} )
{
my $key0;
(@rlh_keys) = map { s/^rl_//; $_} grep { /^rl_/ } keys( %{$symt} );
if( @rlh_keys && ($key0 = $rlh_keys[0]) )
{
local(*DBISHELL_GLOB) = $symt->{ join('_', 'rl_', $key0) };
return wantarray ? ($key0, $DBISHELL_GLOB) : $key0;
}
}
return ();
}
sub _trl_perl_tie_nextkey
{
package Term::ReadLine::Perl::Tie;
my $symt;
my $self = shift(@_);
my $last = shift(@_);
if( $symt = $::{'readline::'} )
{
my $seen = 0;
foreach (@rlh_keys)
{
if( !$seen ){ $seen = ($_ eq $last); next }
local(*DBISHELL_GLOB) = $symt->{ join('_', 'rl_', $_) };
return wantarray ? ($_, $DBISHELL_GLOB) : $_;
}
}
return ();
}
1;
};
sub _trl_perl_minline ($;$)
{
my $rv = $readline::minlength;
if(@_ == 2) { $readline::minlength = $_[1] }
return $rv;
}
sub term_readline_perl ()
{
my $st;
if( $st =
$::{'Term::'} &&
$::{'Term::'}{'ReadLine::'} &&
$::{'Term::'}{'ReadLine::'}{'Perl::'} )
{
$st->{MinLine} = *_trl_perl_minline;
}
if( $st = $st && $st->{'Tie::'} )
{
$st->{FIRSTKEY} ||= *_trl_perl_tie_firstkey;
$st->{NEXTKEY} ||= *_trl_perl_tie_nextkey;
}
}
__END__
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