1 files changed, 124 insertions, 0 deletions
diff --git a/contrib/memscore/scorer-impl.h b/contrib/memscore/scorer-impl.h
new file mode 100644
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+++ b/contrib/memscore/scorer-impl.h
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+// memscore - in-memory phrase scoring for Statistical Machine Translation
+// Christian Hardmeier, FBK-irst, Trento, 2010
+// $Id$
+
+#ifndef SCORER_IMPL_H
+#define SCORER_IMPL_H
+
+#include "phrasetable.h"
+#include "scorer.h"
+
+class MLPhraseScorer : public PhraseScorer
+{
+private:
+  explicit MLPhraseScorer(PhraseTable &pd, bool reverse) :
+    PhraseScorer(pd, reverse) {}
+
+  virtual void do_score_phrases();
+  virtual Score do_get_score(const PhraseTable::const_iterator &it);
+
+public:
+  static PhraseScorer *create_scorer(const char *argv[], int &argp, bool reverse, const PhraseScorerFactory &ptf);
+};
+
+class WittenBellPhraseScorer : public PhraseScorer
+{
+private:
+  explicit WittenBellPhraseScorer(PhraseTable &pd, bool reverse) :
+    PhraseScorer(pd, reverse) {}
+
+  virtual Score do_get_score(const PhraseTable::const_iterator &it);
+
+public:
+  static PhraseScorer *create_scorer(const char *argv[], int &argp, bool reverse, const PhraseScorerFactory &ptf);
+};
+
+class AbsoluteDiscountPhraseScorer : public PhraseScorer
+{
+private:
+  Score discount_;
+
+  explicit AbsoluteDiscountPhraseScorer(PhraseTable &pd, bool reverse) :
+    PhraseScorer(pd, reverse) {}
+
+  virtual void do_score_phrases();
+  virtual Score do_get_score(const PhraseTable::const_iterator &it);
+
+public:
+  Score get_discount();
+  static PhraseScorer *create_scorer(const char *argv[], int &argp, bool reverse, const PhraseScorerFactory &ptf);
+};
+
+class KNDiscount1PhraseScorer : public PhraseScorer
+{
+private:
+  Count total_distinct_;
+  Score discount_;
+  Count total_count_;
+
+  explicit KNDiscount1PhraseScorer(PhraseTable &pd, bool reverse) :
+    PhraseScorer(pd, reverse) {}
+
+  virtual void do_score_phrases();
+  virtual Score do_get_score(const PhraseTable::const_iterator &it);
+
+public:
+  static PhraseScorer *create_scorer(const char *argv[], int &argp, bool reverse, const PhraseScorerFactory &ptf);
+};
+
+class KNDiscount3PhraseScorer : public PhraseScorer
+{
+private:
+  Score discount1_;
+  Score discount2_;
+  Score discount3plus_;
+
+  Count total_distinct_n1_;
+  Count total_distinct_n2_;
+  Count total_distinct_n3plus_;
+
+  explicit KNDiscount3PhraseScorer(PhraseTable &pd, bool reverse) :
+    PhraseScorer(pd, reverse) {}
+
+  virtual void do_score_phrases();
+  virtual Score do_get_score(const PhraseTable::const_iterator &it);
+
+public:
+  static PhraseScorer *create_scorer(const char *argv[], int &argp, bool reverse, const PhraseScorerFactory &ptf);
+};
+
+class LexicalWeightPhraseScorer : public PhraseScorer
+{
+private:
+  typedef std::map<std::pair<Count,Count>,Score> WeightMapType_;
+
+  WeightMapType_ weight_map_;
+  bool overall_max_score_;
+  const Count null_word_;
+
+  LexicalWeightPhraseScorer(PhraseTable &pd, bool reverse, const String &weights, bool overall_max = true);
+
+  Score get_weight(const String &s_src, const String &s_tgt) const;
+  Score get_weight(Count src, Count tgt) const;
+
+  virtual void do_score_phrases();
+  virtual Score do_get_score(const PhraseTable::const_iterator &it);
+
+public:
+  static PhraseScorer *create_scorer(const char *argv[], int &argp, bool reverse, const PhraseScorerFactory &ptf);
+};
+
+class ConstantPhraseScorer : public PhraseScorer
+{
+private:
+  Score constant_;
+
+  ConstantPhraseScorer(PhraseTable &pt, bool reverse, Score constant) : PhraseScorer(pt, reverse), constant_(constant) {}
+
+  virtual Score do_get_score(const PhraseTable::const_iterator &it);
+
+public:
+  static PhraseScorer *create_scorer(const char *argv[], int &argp, bool reverse, const PhraseScorerFactory &ptf);
+};
+
+#endif