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package Google::ProtocolBuffers::CodeGen;
use strict;
use warnings;
use Google::ProtocolBuffers::Constants qw/:types :labels :complex_types/;
my %primitive_types = reverse (
TYPE_DOUBLE => TYPE_DOUBLE,
TYPE_FLOAT => TYPE_FLOAT,
TYPE_INT64 => TYPE_INT64,
TYPE_UINT64 => TYPE_UINT64,
TYPE_INT32 => TYPE_INT32,
TYPE_FIXED64=> TYPE_FIXED64,
TYPE_FIXED32=> TYPE_FIXED32,
TYPE_BOOL => TYPE_BOOL,
TYPE_STRING => TYPE_STRING,
TYPE_GROUP => TYPE_GROUP, ##
TYPE_MESSAGE=> TYPE_MESSAGE, ## should never appear, because 'message' is a 'complex type'
TYPE_BYTES => TYPE_BYTES,
TYPE_UINT32 => TYPE_UINT32,
TYPE_ENUM => TYPE_ENUM, ##
TYPE_SFIXED32=>TYPE_SFIXED32,
TYPE_SFIXED64=>TYPE_SFIXED64,
TYPE_SINT32 => TYPE_SINT32,
TYPE_SINT64 => TYPE_SINT64,
);
my %labels = reverse (
LABEL_OPTIONAL => LABEL_OPTIONAL,
LABEL_REQUIRED => LABEL_REQUIRED,
LABEL_REPEATED => LABEL_REPEATED,
);
sub _get_perl_literal {
my $v = shift;
my $opts = shift;
if ($v =~ /^-?\d+$/) {
## integer literal
if ($v>0x7fff_ffff || $v<-0x8000_0000) {
return "Math::BigInt->new('$v')";
} else {
return "$v";
}
} elsif ($v =~ /[-+]?\d*\.\d+([Ee][\+-]?\d+)?|[-+]?\d+[Ee][\+-]?\d+/i) {
## floating point literal
return "$v";
} else {
## string literal
$v =~ s/([\x00-\x1f'"\\$@%\x80-\xff])/ '\\x{' . sprintf("%02x", ord($1)) . '}' /ge;
return qq["$v"];
}
}
sub generate_code_of_enum {
my $self = shift;
my $opts = shift;
my $class_name = ref($self) || $self;
my $fields_text;
foreach my $f (@{ $self->_pb_fields_list }) {
my ($name, $value) = @$f;
$value = _get_perl_literal($value, $opts);
$fields_text .= " ['$name', $value],\n";
}
return <<"CODE";
unless ($class_name->can('_pb_fields_list')) {
Google::ProtocolBuffers->create_enum(
'$class_name',
[
$fields_text
]
);
}
CODE
}
sub generate_code_of_message_or_group {
my $self = shift;
my $opts = shift;
my $create_what =
($self->_pb_complex_type_kind==MESSAGE) ? 'create_message' :
($self->_pb_complex_type_kind==GROUP) ? 'create_group' : die;
my $class_name = ref($self) || $self;
my $fields_text = ''; # may be empty, as empty messages are allowed
foreach my $f (@{ $self->_pb_fields_list }) {
my ($label, $type, $name, $field_number, $default_value) = @$f;
die unless $labels{$label};
$label = "Google::ProtocolBuffers::Constants::$labels{$label}()";
if ($primitive_types{$type}) {
$type = "Google::ProtocolBuffers::Constants::$primitive_types{$type}()";
} else {
$type = "'$type'";
}
$default_value = (defined $default_value) ?
_get_perl_literal($default_value, $opts) : 'undef';
$fields_text .= <<"FIELD";
[
$label,
$type,
'$name', $field_number, $default_value
],
FIELD
}
my $oneofs_text = " undef,\n";
if ($self->can('_pb_oneofs')) {
$oneofs_text = " {\n";
while (my ($name, $fields) = each %{$self->_pb_oneofs}) {
$oneofs_text .= " '$name' => [\n";
foreach my $f (@$fields) {
$oneofs_text .= " '$f',\n";
}
$oneofs_text .= " ],\n";
}
$oneofs_text .= " },\n";
}
my $options = '';
foreach my $opt_name (qw/create_accessors follow_best_practice/) {
if ($opts->{$opt_name}) {
$options .= "'$opt_name' => 1, "
}
}
return <<"CODE";
unless ($class_name->can('_pb_fields_list')) {
Google::ProtocolBuffers->$create_what(
'$class_name',
[
$fields_text
],
$oneofs_text
{ $options }
);
}
CODE
}
1;
|
