Class: Compiler::Compiler

Inherits:
Object
  • Object
show all
Defined in:
lib/sdx/compiler/compiler.rb

Class Method Summary collapse

Class Method Details

.compile(ast) ⇒ Object 



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# File 'lib/sdx/compiler/compiler.rb', line 3

def self.compile(ast)
    bc = ""
    ast.each do |line|
        bc += self.encode_node line
        bc += "\x33"
    end
    bc + "\x16"
end

.encode_block(node) ⇒ Object 



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# File 'lib/sdx/compiler/compiler.rb', line 12

def self.encode_block(node)
    bc = ""
    node.children.each do |child|
        bc += self.encode_node child
    end
    bc
end

.encode_node(node) ⇒ Object 



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# File 'lib/sdx/compiler/compiler.rb', line 20

def self.encode_node(node)
    bc = ""
    case node.nodetype
    when :assign
        name = node.children[0]
        val = node.children[1]
        case node.value
        when "=" # could also be +=, -=, etc.
            bc += "#{self.encode_node val}\x01\x10#{name}\x18"
        else
            nil
        end
    when :number
        bc += "\x21\x13#{node.value}\x18"
    when :float
        bc += "\x21\x15#{node.value}\x18"
    when :string
        bc += "\x21\x14#{node.value}\x18"
    when :block
        b = ""
        node.children.each do |child|
            b += (self.encode_node child) + "\x33"
        end
        b = b[0..-2]
        b += "\x16"
        bc += "\x21\x32#{b.size}\x18#{b}"
    when :call
        node.children.each do |item|
            bc += self.encode_node item
        end
        bc += self.encode_node node.value
        bc += "\x02"
    when :new
        node.children.each do |item|
            bc += self.encode_node item
        end
        bc += self.encode_node node.value
        bc += "\x31"
    when :op
        node.children.each do |child|
            bc += self.encode_node child
        end
        case node.value
        when "+"
            bc += "\x23"
        when "-"
            bc += "\x24"
        when "*"
            bc += "\x25"
        when "/"
            bc += "\x26"
        when "%"
            bc += "\x27"
        when "^"
            bc += "\x28"
        when "=="
            bc += "\x34"
        when "!="
            bc += "\x35"
        when "<"
            bc += "\x36"
        when ">"
            bc += "\x37"
        when "<="
            bc += "\x38"
        when ">="
            bc += "\x39"
        end
    when :if
        bc += self.encode_node node.value
        case node.children[0].nodetype
        when :block
            i = self.encode_block node.children[0]
        else
            i = self.encode_node node.children[0]
        end
        e = nil
        if node.children[1]
            case node.children[1].nodetype
                when :block
                e = self.encode_block node.children[1]
            else
                e = self.encode_node node.children[1]
            end
            i += "\x2a#{e.size}\x18"
        end
        bc += "\x2b#{i.size}\x18" + i
        if e
            bc += e
        end
    when :bool
        bc += "\x21\x12#{node.value}\x18"
    when :name
        bc += "\x20#{node.value}\x18"
    when :nil
        bc += "\x21\x2f"
    when :while
        e = self.encode_node node.value
        bc += e
        total = e.size
        b = nil
        case node.children[0].nodetype
        when :block
            b = self.encode_block node.children[0]
        else
            b = self.encode_node node.children[0]
        end
        add = ""
        #bc += "\x2b#{b.size}\x18"
        total += "\x29#{b.size}\x18".size
        add += b
        total += b.size
        total += "\x2a-#{total}\x18".size
        add += "\x2a-#{total}\x18"
        total -= "\x29#{b.size}\x18".size
        total -= e.size
        add = "\x2b#{total}\x18" + add
        bc += add
    when :for
        bc += self.encode_node node.value
        sym = (0...8).map { (65 + rand(26)).chr }.join
        bc += "\x01\x10__#{sym}\x18"
        e = "\x20__#{sym}\x18\x2e"
        if node.children[0]
            e += "\x01\x10#{node.children[0]}\x18"
        else
            e += "\x01\x10_\x18"
        end
        bc += e
        total = e.size
        b = nil
        case node.children[1].nodetype
        when :block
            b = self.encode_block node.children[1]
        else
            b = self.encode_node node.children[1]
        end
        add = ""
        total += "\x29#{b.size}\x18".size
        add += b
        total += b.size
        total += "\x2a-#{total}\x18".size
        add += "\x2a-#{total}\x18"
        total -= "\x29#{b.size}\x18".size
        total -= e.size
        add = "\x2b#{total}\x18" + add
        bc += add
    when :fn
        name = node.value
        args, body = node.children
        if body.nodetype == :block
            body = self.encode_block body
        else
            body = self.encode_node body
        end
        body += "\x16"
        args = args.join "\x07"
        bc += "\x01\x17#{name}\x18#{args}\x08#{body.size}\x18"
        bc += body
    when :object
        name = node.value
        args, body = node.children
        if body.nodetype == :block
            body = self.encode_block body
        else
            body = self.encode_node body
        end
        body += "\x16"
        if args
            args = args.join "\x07"
        else
            args = ""
        end
        bc += "\x01\x30#{name}\x18#{args}\x08#{body.size}\x18"
        bc += body
    when :list
        node.children.each do |item|
            bc += self.encode_node item
        end
        bc += "\x21\x2c#{node.children.size}\x18"
    when :return
        bc += self.encode_node node.value
        bc += "\x16"
    else
        nil
    end
    bc
end