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#-*- perl -*-
#
# $FML$
#
package Test;
use strict;
use Carp;
sub dump_content
{
my ($obj) = @_;
if (defined $obj) {
if (defined $obj->open()) {
my $buf = '';
while ($buf = $obj->getline()) {
my $y = $obj->eof ? "y" : "n";
print "<", $obj->getpos, "(eof=$y)> ";
print $buf, "\n";
}
$obj->close;
}
else {
croak("cannot open()");
}
}
else {
croak("cannot make object");
}
}
sub rollback
{
my ($obj) = @_;
my $done = 0;
if (defined $obj) {
if (defined $obj->open()) {
while ($_ = $obj->getline()) {
my $y = $obj->eof ? "y" : "n";
print "<", $obj->getpos, "(eof=$y)> ";
print $_, "\n";
unless ($done) {
if ($obj->getpos == 4) {
print STDERR " skip to 6 \n";
$obj->setpos(6);
next;
}
if ($obj->getpos == 7) {
print STDERR " back to 3 \n";
$obj->setpos(3);
$done = 1;
}
}
}
$obj->close;
}
else {
croak("cannot open()");
}
}
else {
croak("cannot make object");
}
}
1;
|
