ronin-rb/ronin-asm

# frozen_string_literal: true
#
# ronin-code-asm - A Ruby DSL for crafting Assembly programs and shellcode.
#
# Copyright (c) 2007-2024 Hal Brodigan (postmodern.mod3 at gmail.com)
#
# ronin-code-asm is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# ronin-code-asm is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with ronin-code-asm.  If not, see <https://www.gnu.org/licenses/>.
#

require 'ronin/code/asm/immediate_operand'

module Ronin
  module Code
    module ASM
      #
      # Represents an instruction.
      #
      class Instruction < Struct.new(:name, :operands)

        #
        # Initializes the instruction.
        #
        # @param [Symbol] name
        #   The instruction name.
        #
        # @param [Array<MemoryOperand, Register, Symbol, Integer>] operands
        #   Operands for the instruction.
        #
        def initialize(name,operands)
          operands = operands.map do |value|
            case value
            when Integer, nil then ImmediateOperand.new(value)
            else                   value
            end
          end

          super(name,operands)
        end

        #
        # The word size of the instruction.
        #
        # @return [Integer, nil]
        #   The word size in bytes.
        #
        def width
          self.operands.map { |op|
            op.width if op.respond_to?(:width)
          }.compact.max
        end

      end
    end
  end
end