evaluation.rb 5.54 KB
Newer Older
Brice Videau's avatar
Brice Videau committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
module CCS
  Comparison = enum FFI::Type::INT32, :ccs_comparison_t, [
    :CCS_BETTER, -1,
    :CCS_EQUIVALENT, 0,
    :CCS_WORSE, 1,
    :CCS_NOT_COMPARABLE, 2
  ]
  class MemoryPointer
    def read_ccs_comparison_t
      Comparison.from_native(read_int32, nil)
    end
  end

  attach_function :ccs_create_evaluation, [:ccs_objective_space_t, :ccs_configuration_t, :ccs_result_t, :size_t, :pointer, :pointer, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_get_objective_space, [:ccs_evaluation_t, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_get_configuration, [:ccs_evaluation_t, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_get_user_data, [:ccs_evaluation_t, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_get_error, [:ccs_evaluation_t, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_set_error, [:ccs_evaluation_t, :ccs_result_t], :ccs_result_t
  attach_function :ccs_evaluation_get_value, [:ccs_evaluation_t, :size_t, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_set_value, [:ccs_evaluation_t, :size_t, :ccs_datum_t], :ccs_result_t
  attach_function :ccs_evaluation_get_values, [:ccs_evaluation_t, :size_t, :pointer, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_get_value_by_name, [:ccs_evaluation_t, :string, :ccs_datum_t], :ccs_result_t
  attach_function :ccs_evaluation_get_objective_value, [:ccs_evaluation_t, :size_t, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_get_objective_values, [:ccs_evaluation_t, :size_t, :pointer, :pointer], :ccs_result_t
  attach_function :ccs_evaluation_cmp, [:ccs_evaluation_t, :ccs_evaluation_t, :pointer], :ccs_result_t
  class Evaluation < Object
    add_handle_property :objective_space, :ccs_objective_space_t, :ccs_evaluation_get_objective_space, memoize: true
    add_handle_property :configuration, :ccs_configuration_t, :ccs_evaluation_get_configuration, memoize: true
    add_property :user_data, :pointer, :ccs_evaluation_get_user_data, memoize: true
    add_property :error, :ccs_result_t, :ccs_evaluation_get_error, memoize: false

    def initialize(handle = nil, retain: false, objective_space: nil, configuration: nil, error: :CCS_SUCCESS, values: nil, user_data: nil)
      if handle
        super(handle, retain: retain)
      else
        if values
          count = values.size
          raise StandardError, :CCS_INVALID_VALUE if count == 0
          p_values = MemoryPointer::new(:ccs_datum_t, count)
          values.each_with_index {  |v, i| Datum::new(p_values[i]).value = v }
          values = p_values
        else
          count = 0
        end
        ptr = MemoryPointer::new(:ccs_evaluation_t)
        res = CCS.ccs_create_evaluation(objective_space, configuration, error, count, values, user_data, ptr)
        CCS.error_check(res)
        super(ptr.read_ccs_evaluation_t, retain: false)
        @objective_space = objective_space
        @configuration = configuration
      end
    end

Brice Videau's avatar
Brice Videau committed
55 56 57 58
    def self.from_handle(handle)
      self::new(handle, retain: true)
    end

Brice Videau's avatar
Brice Videau committed
59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
    def error=(err)
      res = CCS.ccs_evaluation_set_error(@handle, err)
      CCS.error_check(res)
      err
    end

    def set_value(hyperparameter, value)
      d = Datum.from_value(value)
      case hyperparameter
      when String
        hyperparameter = objective_space.hyperparameter_index_by_name(hyperparameter)
      when Hyperparameter
        hyperparameter = objective_space.hyperparameter_index(hyperparameter)
      end
      res = CCS.ccs_evaluation_set_value(@handle, hyperparameter, d)
      CCS.error_check(res)
      self
    end

    def value(hyperparameter)
      ptr = MemoryPointer::new(:ccs_datum_t)
      case hyperparameter
      when String
        res = CCS.ccs_evaluation_get_value_by_name(@handle, hyperparameter, ptr)
      when Hyperparameter
        res = CCS.ccs_evaluation_get_value(@handle, objective_space.hyperparameter_index(hyperparameter), ptr)
      when Integer
        res = CCS.ccs_evaluation_get_value(@handle, hyperparameter, ptr)
      else
        raise StandardError, :CCS_INVALID_VALUE
      end
      CCS.error_check(res)
      Datum::new(ptr).value
    end

    def num_values
      @num_values ||= begin
        ptr = MemoryPointer::new(:size_t)
        res = CCS.ccs_evaluation_get_values(@handle, 0, nil, ptr)
        CCS.error_check(res)
        ptr.read_size_t
      end
    end

    def values
      count = num_values
      return [] if count == 0
      values = MemoryPointer::new(:ccs_datum_t, count)
      res = CCS.ccs_evaluation_get_values(@handle, count, values, nil)
      CCS.error_check(res)
      count.times.collect { |i| Datum::new(values[i]).value }
    end

    def num_objective_values
      @num_values ||= begin
        ptr = MemoryPointer::new(:size_t)
        res = CCS.ccs_evaluation_get_objective_values(@handle, 0, nil, ptr)
        CCS.error_check(res)
        ptr.read_size_t
      end
    end

    def objective_values
      count = num_values
      return [] if count == 0
      values = MemoryPointer::new(:ccs_datum_t, count)
      res = CCS.ccs_evaluation_get_objective_values(@handle, count, values, nil)
      CCS.error_check(res)
      count.times.collect { |i| Datum::new(values[i]).value }
    end

    def cmp(other)
      ptr = MemoryPointer::new(:ccs_objective_type_t)
      res = CCS.ccs_evaluation_cmp(@handle, other, ptr)
      CCS.error_check(res)
      ptr.read_ccs_comparison_t
    end

    def <=>(other)
      ptr = MemoryPointer::new(:ccs_objective_type_t)
      res = CCS.ccs_evaluation_cmp(@handle, other, ptr)
      CCS.error_check(res)
      r = ptr.read_int32
      r == 2 ? nil : r 
    end

  end
end