courgette/adjustment_method.h

   1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COURGETTE_ADJUSTMENT_METHOD_H_
   6 #define COURGETTE_ADJUSTMENT_METHOD_H_
   7
   8 #include "base/basictypes.h"
   9
  10 namespace courgette {
  11
  12 class AssemblyProgram;
  13
  14 class AdjustmentMethod {
  15  public:
  16   // Factory methods for making adjusters.
  17
  18   // Returns the adjustment method used in production.
  19   static AdjustmentMethod* MakeProductionAdjustmentMethod() {
  20     return MakeShingleAdjustmentMethod();
  21   }
  22
  23   // Returns and adjustement method that makes no adjustments.
  24   static AdjustmentMethod* MakeNullAdjustmentMethod();
  25
  26   // Returns the original adjustment method.
  27   static AdjustmentMethod* MakeTrieAdjustmentMethod();
  28
  29   // Returns the new shingle tiling adjustment method.
  30   static AdjustmentMethod* MakeShingleAdjustmentMethod();
  31
  32   // AdjustmentMethod interface:
  33
  34   // Adjusts |program| to increase similarity to |model|.  |program| can be
  35   // changed in any way provided that it still produces the same output when
  36   // assembled.
  37   virtual bool Adjust(const AssemblyProgram& model,
  38                       AssemblyProgram* program) = 0;
  39
  40   // Deletes 'this' adjustment method.
  41   virtual void Destroy();
  42
  43  protected:
  44   AdjustmentMethod() {}
  45   virtual ~AdjustmentMethod() {}
  46
  47   DISALLOW_COPY_AND_ASSIGN(AdjustmentMethod);
  48 };
  49
  50 }  // namespace courgette
  51 #endif  // COURGETTE_ADJUSTMENT_METHOD_H_