view release on metacpan or  search on metacpan

local/lib/perl5/YAML/Tiny.pm  view on Meta::CPAN

        # Do we have a value?
        if ( length $lines->[0] ) {
            # Yes
            $hash->{$key} = $self->_load_scalar(
                shift(@$lines), [ @$indent, undef ], $lines
            );
        } else {
            # An indent
            shift @$lines;
            unless ( @$lines ) {
                $hash->{$key} = undef;
                return 1;
            }
            if ( $lines->[0] =~ /^(\s*)-/ ) {
                $hash->{$key} = [];
                $self->_load_array(
                    $hash->{$key}, [ @$indent, length($1) ], $lines
                );
            } elsif ( $lines->[0] =~ /^(\s*)./ ) {
                my $indent2 = length("$1");
                if ( $indent->[-1] >= $indent2 ) {
                    # Null hash entry
                    $hash->{$key} = undef;
                } else {
                    $hash->{$key} = {};
                    $self->_load_hash(
                        $hash->{$key}, [ @$indent, length($1) ], $lines
                    );
                }
            }
        }
    }

    return 1;
}


###
# Dumper functions:

# Save an object to a file
sub _dump_file {
    my $self = shift;

    require Fcntl;

    # Check the file
    my $file = shift or $self->_error( 'You did not specify a file name' );

    my $fh;
    # flock if available (or warn if not possible for OS-specific reasons)
    if ( _can_flock() ) {
        # Open without truncation (truncate comes after lock)
        my $flags = Fcntl::O_WRONLY()|Fcntl::O_CREAT();
        sysopen( $fh, $file, $flags );
        unless ( $fh ) {
            $self->_error("Failed to open file '$file' for writing: $!");
        }

        # Use no translation and strict UTF-8
        binmode( $fh, ":raw:encoding(UTF-8)");

        flock( $fh, Fcntl::LOCK_EX() )
            or warn "Couldn't lock '$file' for reading: $!";

        # truncate and spew contents
        truncate $fh, 0;
        seek $fh, 0, 0;
    }
    else {
        open $fh, ">:unix:encoding(UTF-8)", $file;
    }

    # serialize and spew to the handle
    print {$fh} $self->_dump_string;

    # close the file (release the lock)
    unless ( close $fh ) {
        $self->_error("Failed to close file '$file': $!");
    }

    return 1;
}

# Save an object to a string
sub _dump_string {
    my $self = shift;
    return '' unless ref $self && @$self;

    # Iterate over the documents
    my $indent = 0;
    my @lines  = ();

    eval {
        foreach my $cursor ( @$self ) {
            push @lines, '---';

            # An empty document
            if ( ! defined $cursor ) {
                # Do nothing

            # A scalar document
            } elsif ( ! ref $cursor ) {
                $lines[-1] .= ' ' . $self->_dump_scalar( $cursor );

            # A list at the root
            } elsif ( ref $cursor eq 'ARRAY' ) {
                unless ( @$cursor ) {
                    $lines[-1] .= ' []';
                    next;
                }
                push @lines, $self->_dump_array( $cursor, $indent, {} );

            # A hash at the root
            } elsif ( ref $cursor eq 'HASH' ) {
                unless ( %$cursor ) {
                    $lines[-1] .= ' {}';
                    next;
                }
                push @lines, $self->_dump_hash( $cursor, $indent, {} );