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# $Id: Error.pm,v 1.1.2.1 2004/04/20 20:09:48 pajas Exp $
#
# This is free software, you may use it and distribute it under the same terms as
# Perl itself.
#
# Copyright 2001-2003 AxKit.com Ltd., 2002-2006 Christian Glahn, 2006-2009 Petr Pajas
#
#
package XML::LibXML::Error;
use strict;
use warnings;
# To avoid a "Deep recursion on subroutine as_string" warning
no warnings 'recursion';
use Encode ();
use vars qw(@error_domains $VERSION $WARNINGS);
use Carp;
use overload
'""' => \&as_string,
'eq' => sub {
("$_[0]" eq "$_[1]")
},
'cmp' => sub {
("$_[0]" cmp "$_[1]")
},
fallback => 1;
$WARNINGS = 0; # 0: suppress, 1: report via warn, 2: report via die
$VERSION = "2.0204"; # VERSION TEMPLATE: DO NOT CHANGE
use constant XML_ERR_NONE => 0;
use constant XML_ERR_WARNING => 1; # A simple warning
use constant XML_ERR_ERROR => 2; # A recoverable error
use constant XML_ERR_FATAL => 3; # A fatal error
use constant XML_ERR_FROM_NONE => 0;
use constant XML_ERR_FROM_PARSER => 1; # The XML parser
use constant XML_ERR_FROM_TREE => 2; # The tree module
use constant XML_ERR_FROM_NAMESPACE => 3; # The XML Namespace module
use constant XML_ERR_FROM_DTD => 4; # The XML DTD validation
use constant XML_ERR_FROM_HTML => 5; # The HTML parser
use constant XML_ERR_FROM_MEMORY => 6; # The memory allocator
use constant XML_ERR_FROM_OUTPUT => 7; # The serialization code
use constant XML_ERR_FROM_IO => 8; # The Input/Output stack
use constant XML_ERR_FROM_FTP => 9; # The FTP module
use constant XML_ERR_FROM_HTTP => 10; # The FTP module
use constant XML_ERR_FROM_XINCLUDE => 11; # The XInclude processing
use constant XML_ERR_FROM_XPATH => 12; # The XPath module
use constant XML_ERR_FROM_XPOINTER => 13; # The XPointer module
use constant XML_ERR_FROM_REGEXP => 14; # The regular expressions module
use constant XML_ERR_FROM_DATATYPE => 15; # The W3C XML Schemas Datatype module
use constant XML_ERR_FROM_SCHEMASP => 16; # The W3C XML Schemas parser module
use constant XML_ERR_FROM_SCHEMASV => 17; # The W3C XML Schemas validation module
use constant XML_ERR_FROM_RELAXNGP => 18; # The Relax-NG parser module
use constant XML_ERR_FROM_RELAXNGV => 19; # The Relax-NG validator module
use constant XML_ERR_FROM_CATALOG => 20; # The Catalog module
use constant XML_ERR_FROM_C14N => 21; # The Canonicalization module
use constant XML_ERR_FROM_XSLT => 22; # The XSLT engine from libxslt
use constant XML_ERR_FROM_VALID => 23; # The DTD validation module with valid context
use constant XML_ERR_FROM_CHECK => 24; # The error-checking module
use constant XML_ERR_FROM_WRITER => 25; # The xmlwriter module
use constant XML_ERR_FROM_MODULE => 26; # The dynamically-loaded module module
use constant XML_ERR_FROM_I18N => 27; # The module handling character conversion
use constant XML_ERR_FROM_SCHEMATRONV=> 28; # The Schematron validator module
@error_domains = ("", "parser", "tree", "namespace", "validity",
"HTML parser", "memory", "output", "I/O", "ftp",
"http", "XInclude", "XPath", "xpointer", "regexp",
"Schemas datatype", "Schemas parser", "Schemas validity",
"Relax-NG parser", "Relax-NG validity",
"Catalog", "C14N", "XSLT", "validity", "error-checking",
"xmlwriter", "dynamic loading", "i18n",
"Schematron validity");
my $MAX_ERROR_PREV_DEPTH = 100;
for my $field (qw<code _prev level file line nodename message column context
str1 str2 str3 num1 num2 __prev_depth>) {
my $method = sub { $_[0]{$field} };
no strict 'refs';
*$field = $method;
}
{
sub new {
my ($class,$xE) = @_;
my $terr;
if (ref($xE)) {
my ($context,$column) = $xE->context_and_column();
$terr =bless {
domain => $xE->domain(),
level => $xE->level(),
code => $xE->code(),
message => $xE->message(),
file => $xE->file(),
line => $xE->line(),
str1 => $xE->str1(),
str2 => $xE->str2(),
str3 => $xE->str3(),
num1 => $xE->num1(),
num2 => $xE->num2(),
__prev_depth => 0,
(defined($context) ?
(
context => $context,
column => $column,
) : ()),
}, $class;
} else {
# !!!! problem : got a flat error
# warn("PROBLEM: GOT A FLAT ERROR $xE\n");
$terr =bless {
domain => 0,
level => 2,
code => -1,
message => $xE,
file => undef,
line => undef,
str1 => undef,
str2 => undef,
str3 => undef,
num1 => undef,
num2 => undef,
__prev_depth => 0,
}, $class;
}
return $terr;
}
sub _callback_error {
#print "CALLBACK\n";
my ($xE,$prev) = @_;
my $terr;
$terr=XML::LibXML::Error->new($xE);
if ($terr->{level} == XML_ERR_WARNING and $WARNINGS!=2) {
warn $terr if $WARNINGS;
return $prev;
}
#unless ( defined $terr->{file} and length $terr->{file} ) {
# this would make it easier to recognize parsed strings
# but it breaks old implementations
# [CG] $terr->{file} = 'string()';
#}
#warn "Saving the error ",$terr->dump;
if (ref($prev))
{
if ($prev->__prev_depth() >= $MAX_ERROR_PREV_DEPTH)
{
return $prev;
}
$terr->{_prev} = $prev;
$terr->{__prev_depth} = $prev->__prev_depth() + 1;
}
else
{
$terr->{_prev} = defined($prev) && length($prev) ? XML::LibXML::Error->new($prev) : undef;
}
return $terr;
}
sub _instant_error_callback {
my $xE = shift;
my $terr= XML::LibXML::Error->new($xE);
print "Reporting an instanteous error ",$terr->dump;
die $terr;
}
sub _report_warning {
my ($saved_error) = @_;
#print "CALLBACK WARN\n";
if ( defined $saved_error ) {
#print "reporting a warning ",$saved_error->dump;
warn $saved_error;
}
}
sub _report_error {
my ($saved_error) = @_;
#print "CALLBACK ERROR: $saved_error\n";
if ( defined $saved_error ) {
die $saved_error;
}
}
}
# backward compatibility
sub int1 { $_[0]->num1 }
sub int2 { $_[0]->num2 }
sub domain {
my ($self)=@_;
return undef unless ref($self);
my $domain = $self->{domain};
# Newer versions of libxml2 might yield errors in domains that aren't
# listed above. Invent something reasonable in that case.
return $domain < @error_domains ? $error_domains[$domain] : "domain_$domain";
}
sub as_string {
my ($self)=@_;
my $msg = "";
my $level;
if (defined($self->{_prev})) {
$msg = $self->{_prev}->as_string;
}
if ($self->{level} == XML_ERR_NONE) {
$level = "";
} elsif ($self->{level} == XML_ERR_WARNING) {
$level = "warning";
} elsif ($self->{level} == XML_ERR_ERROR ||
$self->{level} == XML_ERR_FATAL) {
$level = "error";
}
my $where="";
if (defined($self->{file})) {
$where="$self->{file}:$self->{line}";
} elsif (($self->{domain} == XML_ERR_FROM_PARSER)
and
$self->{line}) {
$where="Entity: line $self->{line}";
}
if ($self->{nodename}) {
$where.=": element ".$self->{nodename};
}
$msg.=$where.": " if $where ne "";
$msg.=$self->domain." ".$level." :";
my $str=$self->{message}||"";
chomp($str);
$msg.=" ".$str."\n";
if (($self->{domain} == XML_ERR_FROM_XPATH) and
defined($self->{str1})) {
$msg.=$self->{str1}."\n";
$msg.=(" " x $self->{num1})."^\n";
} elsif (defined $self->{context}) {
# If the error relates to character-encoding problems in the context,
# then doing textual operations on it will spew warnings that
# XML::LibXML can do nothing to fix. So just disable all such
# warnings. This has the pleasing benefit of making the test suite
# run warning-free.
no warnings 'utf8';
my $context = Encode::encode('utf8', $self->{context}, Encode::FB_DEFAULT);
$msg.=$context."\n";
$context = substr($context,0,$self->{column});
$context=~s/[^\t]/ /g;
$msg.=$context."^\n";
}
return $msg;
}
sub dump {
my ($self)=@_;
use Data::Dumper;
return Data::Dumper->new([$self],['error'])->Dump;
}
1;
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