require_relative 'Fits'
class Metadata
@@emitter_local = nil
def initialize(fields, initializers)
@fields = fields
@initializers = initializers
end
def empty?
@fields.nil?
end
def length
empty? ? 0 : @fields.length
end
def struct(op)
return if empty?
def convertFields(prefix, fields)
fields.map do |field, type|
if type.kind_of? Hash
"#{prefix}union {\n#{convertFields(prefix + ' ', type)}\n#{prefix}};"
else
"#{prefix}#{type.to_s} m_#{field.to_s};"
end
end.join("\n")
end
fields = convertFields(" ", @fields)
inits = nil
if @initializers && (not @initializers.empty?)
inits = "\n : " + @initializers.map do |metadata, arg|
"m_#{metadata}(__op.m_#{arg})"
end.join("\n , ").concat("\n ");
end
<<-EOF
struct Metadata {
WTF_MAKE_NONCOPYABLE(Metadata);
public:
Metadata(const #{op.capitalized_name}&#{" __op" if inits})#{inits} { }
#{fields}
};
EOF
end
def accessor
return if empty?
<<-EOF
Metadata& metadata(CodeBlock* codeBlock) const
{
return codeBlock->metadata<Metadata>(opcodeID, #{Metadata.field_name});
}
Metadata& metadata(ExecState* exec) const
{
return metadata(exec->codeBlock());
}
EOF
end
def field(prefix)
return if empty?
"\n#{prefix}unsigned #{Metadata.field_name};"
end
def load_from_stream(index, size)
return if empty?
"#{Metadata.field_name}(#{Fits::convert(size, "stream[#{index}]", :unsigned)})"
end
def create_emitter_local
return if empty?
<<-EOF.chomp
auto #{emitter_local.name} = gen->addMetadataFor(opcodeID);
EOF
end
def emitter_local
unless @@emitter_local
@@emitter_local = Argument.new("__metadataID", :unsigned, -1)
end
return @@emitter_local
end
def self.field_name
"m_metadataID"
end
end