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package LXDebug;
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use constant NONE => 0;
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use constant INFO => 1;
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use constant DEBUG1 => 2;
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use constant DEBUG2 => 3;
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use constant FILE_TARGET => 0;
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use constant STDERR_TARGET => 1;
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use POSIX qw(strftime);
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my $data_dumper_available;
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BEGIN {
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eval("use Data::Dumper");
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$data_dumper_available = $@ ? 0 : 1;
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$global_level = NONE;
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$global_trace_subs = 0;
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}
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sub new {
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my $type = shift;
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my $self = {};
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$self->{"calldepth"} = 0;
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$self->{"file"} = "/tmp/lx-office-debug.log";
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$self->{"target"} = FILE_TARGET;
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$self->{"level"} = 0;
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$self->{"trace_subs"} = 0;
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while ($_[0]) {
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$self->{ $_[0] } = $_[1];
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shift;
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shift;
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}
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bless($self, $type);
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}
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sub set_target {
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my ($self, $target, $file) = @_;
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if ((FILE_TARGET == $target) && $file) {
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$self->{"file"} = $file;
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$self->{"target"} = FILE_TARGET;
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} elsif (STDERR_TARGET == $target) {
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$self->{"target"} = STDERR_TARGET;
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}
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}
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sub enter_sub {
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my ($self, $level) = @_;
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return 1 if $global_trace_subs < $level;
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if (!$self->{"trace_subs"} && !$global_trace_subs) {
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return 1;
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}
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my ($package, $filename, $line, $subroutine) = caller(1);
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my ($dummy1, $self_filename, $self_line) = caller(0);
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my $indent = " " x $self->{"calldepth"};
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$self->{"calldepth"} += 1;
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if (!defined($package)) {
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$self->_write('sub', $indent . "\\ top-level?\n");
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} else {
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$self->_write('sub', $indent
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. "\\ ${subroutine} in "
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. "${self_filename}:${self_line} called from "
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. "${filename}:${line}\n");
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}
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return 1;
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}
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sub leave_sub {
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my ($self, $level) = @_;
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return 1 if $global_trace_subs < $level;
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if (!$self->{"trace_subs"} && !$global_trace_subs) {
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return 1;
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}
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my ($package, $filename, $line, $subroutine) = caller(1);
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my ($dummy1, $self_filename, $self_line) = caller(0);
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$self->{"calldepth"} -= 1;
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my $indent = " " x $self->{"calldepth"};
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if (!defined($package)) {
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$self->_write('sub', $indent . "/ top-level?\n");
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} else {
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$self->_write('sub', $indent . "/ ${subroutine} in " . "${self_filename}:${self_line}\n");
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}
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return 1;
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}
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sub message {
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my ($self, $level, $message) = @_;
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my ($log_level) = $self->{"level"};
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if ($global_level && ($global_level > $log_level)) {
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$log_level = $global_level;
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}
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if ($log_level >= $level) {
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$self->_write(INFO == $level
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? "info"
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: DEBUG1 == $level ? "debug1" : "debug2",
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$message);
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}
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}
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sub dump {
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my ($self, $level, $name, $variable) = @_;
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if ($data_dumper_available) {
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$self->message($level, "dumping ${name}:\n" . Dumper($variable));
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} else {
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$self->message($level,
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"dumping ${name}: Data::Dumper not available; "
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. "variable cannot be dumped");
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}
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}
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sub enable_sub_tracing {
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my ($self) = @_;
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$self->{"trace_subs"} = 1;
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}
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sub disable_sub_tracing {
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my ($self) = @_;
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$self->{"trace_subs"} = 1;
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}
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sub _write {
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my ($self, $prefix, $message) = @_;
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my $date = strftime("%Y-%m-%d %H:%M:%S $$ ${prefix}: ", localtime(time()));
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local *FILE;
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chomp($message);
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if ((FILE_TARGET == $self->{"target"})
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&& open(FILE, ">>" . $self->{"file"})) {
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print(FILE "${date}${message}\n");
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close(FILE);
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} elsif (STDERR_TARGET == $self->{"target"}) {
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print(STDERR "${date}${message}\n");
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}
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}
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1;
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