--- /dev/null
+package TAP::Parser::YAMLish::Reader;
+
+use strict;
+use vars qw($VERSION @ISA);
+
+use TAP::Object ();
+
+@ISA = 'TAP::Object';
+$VERSION = '3.12';
+
+# TODO:
+# Handle blessed object syntax
+
+# Printable characters for escapes
+my %UNESCAPES = (
+ z => "\x00", a => "\x07", t => "\x09",
+ n => "\x0a", v => "\x0b", f => "\x0c",
+ r => "\x0d", e => "\x1b", '\\' => '\\',
+);
+
+my $QQ_STRING = qr{ " (?:\\. | [^"])* " }x;
+my $HASH_LINE = qr{ ^ ($QQ_STRING|\S+) \s* : \s* (?: (.+?) \s* )? $ }x;
+my $IS_HASH_KEY = qr{ ^ [\w\'\"] }x;
+my $IS_END_YAML = qr{ ^ \.\.\. \s* $ }x;
+my $IS_QQ_STRING = qr{ ^ $QQ_STRING $ }x;
+
+# new() implementation supplied by TAP::Object
+
+sub read {
+ my $self = shift;
+ my $obj = shift;
+
+ die "Must have a code reference to read input from"
+ unless ref $obj eq 'CODE';
+
+ $self->{reader} = $obj;
+ $self->{capture} = [];
+
+ # Prime the reader
+ $self->_next;
+ return unless $self->{next};
+
+ my $doc = $self->_read;
+
+ # The terminator is mandatory otherwise we'd consume a line from the
+ # iterator that doesn't belong to us. If we want to remove this
+ # restriction we'll have to implement look-ahead in the iterators.
+ # Which might not be a bad idea.
+ my $dots = $self->_peek;
+ die "Missing '...' at end of YAMLish"
+ unless defined $dots
+ and $dots =~ $IS_END_YAML;
+
+ delete $self->{reader};
+ delete $self->{next};
+
+ return $doc;
+}
+
+sub get_raw { join( "\n", grep defined, @{ shift->{capture} || [] } ) . "\n" }
+
+sub _peek {
+ my $self = shift;
+ return $self->{next} unless wantarray;
+ my $line = $self->{next};
+ $line =~ /^ (\s*) (.*) $ /x;
+ return ( $2, length $1 );
+}
+
+sub _next {
+ my $self = shift;
+ die "_next called with no reader"
+ unless $self->{reader};
+ my $line = $self->{reader}->();
+ $self->{next} = $line;
+ push @{ $self->{capture} }, $line;
+}
+
+sub _read {
+ my $self = shift;
+
+ my $line = $self->_peek;
+
+ # Do we have a document header?
+ if ( $line =~ /^ --- (?: \s* (.+?) \s* )? $/x ) {
+ $self->_next;
+
+ return $self->_read_scalar($1) if defined $1; # Inline?
+
+ my ( $next, $indent ) = $self->_peek;
+
+ if ( $next =~ /^ - /x ) {
+ return $self->_read_array($indent);
+ }
+ elsif ( $next =~ $IS_HASH_KEY ) {
+ return $self->_read_hash( $next, $indent );
+ }
+ elsif ( $next =~ $IS_END_YAML ) {
+ die "Premature end of YAMLish";
+ }
+ else {
+ die "Unsupported YAMLish syntax: '$next'";
+ }
+ }
+ else {
+ die "YAMLish document header not found";
+ }
+}
+
+# Parse a double quoted string
+sub _read_qq {
+ my $self = shift;
+ my $str = shift;
+
+ unless ( $str =~ s/^ " (.*?) " $/$1/x ) {
+ die "Internal: not a quoted string";
+ }
+
+ $str =~ s/\\"/"/gx;
+ $str =~ s/ \\ ( [tartan\\favez] | x([0-9a-fA-F]{2}) )
+ / (length($1) > 1) ? pack("H2", $2) : $UNESCAPES{$1} /gex;
+ return $str;
+}
+
+# Parse a scalar string to the actual scalar
+sub _read_scalar {
+ my $self = shift;
+ my $string = shift;
+
+ return undef if $string eq '~';
+ return {} if $string eq '{}';
+ return [] if $string eq '[]';
+
+ if ( $string eq '>' || $string eq '|' ) {
+
+ my ( $line, $indent ) = $self->_peek;
+ die "Multi-line scalar content missing" unless defined $line;
+
+ my @multiline = ($line);
+
+ while (1) {
+ $self->_next;
+ my ( $next, $ind ) = $self->_peek;
+ last if $ind < $indent;
+
+ my $pad = $string eq '|' ? ( ' ' x ( $ind - $indent ) ) : '';
+ push @multiline, $pad . $next;
+ }
+
+ return join( ( $string eq '>' ? ' ' : "\n" ), @multiline ) . "\n";
+ }
+
+ if ( $string =~ /^ ' (.*) ' $/x ) {
+ ( my $rv = $1 ) =~ s/''/'/g;
+ return $rv;
+ }
+
+ if ( $string =~ $IS_QQ_STRING ) {
+ return $self->_read_qq($string);
+ }
+
+ if ( $string =~ /^['"]/ ) {
+
+ # A quote with folding... we don't support that
+ die __PACKAGE__ . " does not support multi-line quoted scalars";
+ }
+
+ # Regular unquoted string
+ return $string;
+}
+
+sub _read_nested {
+ my $self = shift;
+
+ my ( $line, $indent ) = $self->_peek;
+
+ if ( $line =~ /^ -/x ) {
+ return $self->_read_array($indent);
+ }
+ elsif ( $line =~ $IS_HASH_KEY ) {
+ return $self->_read_hash( $line, $indent );
+ }
+ else {
+ die "Unsupported YAMLish syntax: '$line'";
+ }
+}
+
+# Parse an array
+sub _read_array {
+ my ( $self, $limit ) = @_;
+
+ my $ar = [];
+
+ while (1) {
+ my ( $line, $indent ) = $self->_peek;
+ last
+ if $indent < $limit
+ || !defined $line
+ || $line =~ $IS_END_YAML;
+
+ if ( $indent > $limit ) {
+ die "Array line over-indented";
+ }
+
+ if ( $line =~ /^ (- \s+) \S+ \s* : (?: \s+ | $ ) /x ) {
+ $indent += length $1;
+ $line =~ s/-\s+//;
+ push @$ar, $self->_read_hash( $line, $indent );
+ }
+ elsif ( $line =~ /^ - \s* (.+?) \s* $/x ) {
+ die "Unexpected start of YAMLish" if $line =~ /^---/;
+ $self->_next;
+ push @$ar, $self->_read_scalar($1);
+ }
+ elsif ( $line =~ /^ - \s* $/x ) {
+ $self->_next;
+ push @$ar, $self->_read_nested;
+ }
+ elsif ( $line =~ $IS_HASH_KEY ) {
+ $self->_next;
+ push @$ar, $self->_read_hash( $line, $indent, );
+ }
+ else {
+ die "Unsupported YAMLish syntax: '$line'";
+ }
+ }
+
+ return $ar;
+}
+
+sub _read_hash {
+ my ( $self, $line, $limit ) = @_;
+
+ my $indent;
+ my $hash = {};
+
+ while (1) {
+ die "Badly formed hash line: '$line'"
+ unless $line =~ $HASH_LINE;
+
+ my ( $key, $value ) = ( $self->_read_scalar($1), $2 );
+ $self->_next;
+
+ if ( defined $value ) {
+ $hash->{$key} = $self->_read_scalar($value);
+ }
+ else {
+ $hash->{$key} = $self->_read_nested;
+ }
+
+ ( $line, $indent ) = $self->_peek;
+ last
+ if $indent < $limit
+ || !defined $line
+ || $line =~ $IS_END_YAML;
+ }
+
+ return $hash;
+}
+
+1;
+
+__END__
+
+=pod
+
+=head1 NAME
+
+TAP::Parser::YAMLish::Reader - Read YAMLish data from iterator
+
+=head1 VERSION
+
+Version 3.12
+
+=head1 SYNOPSIS
+
+=head1 DESCRIPTION
+
+Note that parts of this code were derived from L<YAML::Tiny> with the
+permission of Adam Kennedy.
+
+=head1 METHODS
+
+=head2 Class Methods
+
+=head3 C<new>
+
+The constructor C<new> creates and returns an empty
+C<TAP::Parser::YAMLish::Reader> object.
+
+ my $reader = TAP::Parser::YAMLish::Reader->new;
+
+=head2 Instance Methods
+
+=head3 C<read>
+
+ my $got = $reader->read($stream);
+
+Read YAMLish from a L<TAP::Parser::Iterator> and return the data structure it
+represents.
+
+=head3 C<get_raw>
+
+ my $source = $reader->get_source;
+
+Return the raw YAMLish source from the most recent C<read>.
+
+=head1 AUTHOR
+
+Andy Armstrong, <andy@hexten.net>
+
+Adam Kennedy wrote L<YAML::Tiny> which provided the template and many of
+the YAML matching regular expressions for this module.
+
+=head1 SEE ALSO
+
+L<YAML::Tiny>, L<YAML>, L<YAML::Syck>, L<Config::Tiny>, L<CSS::Tiny>,
+L<http://use.perl.org/~Alias/journal/29427>
+
+=head1 COPYRIGHT
+
+Copyright 2007-2008 Andy Armstrong.
+
+Portions copyright 2006-2008 Adam Kennedy.
+
+This program is free software; you can redistribute
+it and/or modify it under the same terms as Perl itself.
+
+The full text of the license can be found in the
+LICENSE file included with this module.
+
+=cut
+
projects / dh-make-perl / blobdiff