/usr/share/perl5/AnyData/Storage/TiedHash.pm is in libanydata-perl 0.12-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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package AnyData::Storage::TiedHash;
######################################
use strict;
use warnings;
sub FETCH {
my($self,$key) = @_;
my(@rows,$row,$found);
return $self->{ad}->col_names if($key eq '__colnames');
return $self->{ad}->key_col if $key eq '__key';
my $ismultiple = ref $key;
$self->{ad}->seek_first_record;
while ($row = $self->{ad}->fetchrow_hashref) {
if ( $self->{ad}->match($row,$key) ) {
$found++;
last unless $ismultiple;
push @rows, $row;
}
}
return \@rows if $ismultiple;
return $found ? $row : undef;
}
sub TIEHASH {
my $class = shift;
my $ad = shift;
my $perms = shift || 'r';
my $records = shift || {};
my $self = {
INDEX => 0,
RECORDS => $records,
ad => $ad,
del_marker => "\0",
needs_packing => 0,
PERMS => $perms,
};
return bless $self, $class;
}
sub verify_columns {
my $col_names = shift;
my $val = shift;
my %is_col = map {$_ => 1} @$col_names;
my $errstr = "ERROR: XXX is not a column in the table!\n";
$errstr .= scalar @$col_names
? " columns are: " . join "~",@$col_names,"\n"
: " couldn't find any column names\n";
if (ref $val eq 'HASH') {
for (keys %$val) {
$errstr =~ s/XXX/$_/;
die $errstr if !$is_col{$_};
}
}
else {
$errstr =~ s/XXX/$val/;
$is_col{$val}
? return 1
: die $errstr;
}
}
sub STORE {
my($self,$key,$value) = @_;
#my @c = caller 1;
$self->{errstr} = "Can't store: file is opened in 'r' read-only mode!"
if $self->{PERMS} eq 'r';
return undef if $self->{errstr};
my @colnames = @{ $self->{ad}->col_names };
verify_columns(\@colnames,$value);
return $self->{ad}->update_multiple_rows($key,$value)
if ref $key eq 'HASH';
$self->{ad}->seek(0,2);
my @newrow;
for my $i(0..$#colnames) {
$newrow[$i] = $value->{$colnames[$i]};
next if defined $newrow[$i];
$newrow[$i] = $key if $colnames[$i] eq $self->{ad}->key_col;
$newrow[$i] = undef unless $newrow[$i];
}
return $self->{ad}->push_row(@newrow);
}
sub DELETE {
my($self,$key)=@_;
die "Can't delete: file is opened in 'r' read-only mode!"
if $self->{PERMS} eq 'r';
my $row;
my $count;
return $self->{ad}->delete_multiple_rows($key) if ref $key;
if ($row = $self->FETCH($key) ) {
$self->{ad}->delete_single_row;
$self->{needs_packing}++;
$count++;
}
#return $row;
return $count;
}
sub EXISTS {
my($self,$key)=@_;
return $self->FETCH($key);
}
sub FIRSTKEY {
my $self = shift;
$self->{ad}->seek_first_record();
my $found =0;
my $row;
while (!$found) {
$row = $self->{ad}->fetchrow_hashref() or last;
$found++;
last;
}
return $found ? $row : undef;
}
sub NEXTKEY {
my $self = shift;
my $row;
my $lastcol=0;
my $found=0;
while (!$found) {
$row = $self->{ad}->fetchrow_hashref() or last;
$found++;
last;
}
return $found ? $row : undef;
}
sub adRows {
my $self = shift;
my $key = shift;
my $count=0;
$self->{ad}->seek_first_record;
if (!$key) {
while (my $row = $self->{ad}->fetchrow_hashref) {
$count++;
}
}
else {
while (my $row = $self->{ad}->fetchrow_hashref) {
$count++ if $self->{ad}->match($row,$key);
}
}
return $count;
}
sub adColumn {
my($self,$column,$flags)=@_;
$flags ||= '';
my @results=();
$self->{ad}->seek_first_record;
while (my $row = $self->{ad}->fetchrow_hashref) {
push @results, $row->{$column}
}
my %is_member;
@results = grep(!$is_member{$_}++, @results) if $flags; $flags =~ /u/i;
# @results = sort @results if $flags =~ /a/i;
# @results = reverse sort @results if $flags =~ /d/i;
return @results;
}
sub DESTROY {
#my $self=shift;
#undef $self->{ad};
#print "HASH DESTROYED";
}
##############################
# END OF AnyData::Tiedhash
##############################
1;
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