From 8d7312c7ee413c636ded9aaace714fb519485c27 Mon Sep 17 00:00:00 2001
From: Chris Dyer <redpony@gmail.com>
Date: Fri, 17 Jan 2014 04:07:16 -0500
Subject: new de split

---
 decoder/ff_csplit.cc | 36 ++++++++++++++++++++++++++++++++++--
 decoder/ff_csplit.h  |  1 +
 2 files changed, 35 insertions(+), 2 deletions(-)

(limited to 'decoder')

diff --git a/decoder/ff_csplit.cc b/decoder/ff_csplit.cc
index e6f78f84..33b6cea8 100644
--- a/decoder/ff_csplit.cc
+++ b/decoder/ff_csplit.cc
@@ -14,12 +14,19 @@
 #include "stringlib.h"
 #include "tdict.h"
 
+#ifndef HAVE_OLD_CPP
+# include <unordered_set>
+#else
+# include <tr1/unordered_set>
+namespace std { using std::tr1::unordered_set; }
+#endif
 using namespace std;
 
 struct BasicCSplitFeaturesImpl {
   BasicCSplitFeaturesImpl(const string& param) :
       word_count_(FD::Convert("WordCount")),
       letters_sq_(FD::Convert("LettersSq")),
+      letters_log_(FD::Convert("LettersLog")),
       letters_sqrt_(FD::Convert("LettersSqrt")),
       in_dict_(FD::Convert("InDict")),
       in_dict_sub_word_(FD::Convert("InDictSubWord")),
@@ -31,13 +38,14 @@ struct BasicCSplitFeaturesImpl {
       high_freq_(FD::Convert("HighFreq")),
       med_freq_(FD::Convert("MedFreq")),
       freq_(FD::Convert("Freq")),
+      in_dict_full_word_(FD::Convert("InDictFullWord")),
       fl1_(FD::Convert("FreqLen1")),
       fl2_(FD::Convert("FreqLen2")),
       bad_(FD::Convert("Bad")) {
     vector<string> argv;
     int argc = SplitOnWhitespace(param, &argv);
-    if (argc != 1 && argc != 2) {
-      cerr << "Expected: freqdict.txt [badwords.txt]\n";
+    if (argc != 1 && argc != 2 && argc != 3) {
+      cerr << "Expected: freqdict.txt [badwords.txt] [sensitvewords.txt]\n";
       abort();
     }
     freq_dict_.Load(argv[0]);
@@ -51,6 +59,14 @@ struct BasicCSplitFeaturesImpl {
         bad_words_.insert(TD::Convert(badword));
       }
     }
+    if (argc == 3) {
+      ReadFile rf(argv[2]);
+      istream& in = *rf.stream();
+      string line;
+      while(getline(in, line)) {
+        special_feats_[TD::Convert(line)] = FD::Convert("CS:"+line);
+      }
+    }
   }
 
   void TraversalFeaturesImpl(const Hypergraph::Edge& edge,
@@ -59,6 +75,7 @@ struct BasicCSplitFeaturesImpl {
 
   const int word_count_;
   const int letters_sq_;
+  const int letters_log_;
   const int letters_sqrt_;
   const int in_dict_;
   const int in_dict_sub_word_;
@@ -70,11 +87,13 @@ struct BasicCSplitFeaturesImpl {
   const int high_freq_;
   const int med_freq_;
   const int freq_;
+  const int in_dict_full_word_;
   const int fl1_;
   const int fl2_;
   const int bad_;
   FreqDict<float> freq_dict_;
   set<WordID> bad_words_;
+  unordered_map<WordID, int> special_feats_;
 };
 
 BasicCSplitFeatures::BasicCSplitFeatures(const string& param) :
@@ -85,8 +104,15 @@ void BasicCSplitFeaturesImpl::TraversalFeaturesImpl(
                                      const int src_word_length,
                                      SparseVector<double>* features) const {
   const bool subword = (edge.i_ > 0) || (edge.j_ < src_word_length);
+  string len_bias = "LenBias_0";
+  int swlen = log(src_word_length) / log(1.69);
+  if (swlen > 9) swlen = 9;
+  len_bias[8] += swlen;
+  int fid_len_bias_ = FD::Convert(len_bias);
+  features->set_value(fid_len_bias_, 1.0); 
   features->set_value(word_count_, 1.0);
   features->set_value(letters_sq_, (edge.j_ - edge.i_) * (edge.j_ - edge.i_));
+  features->set_value(letters_log_, log(edge.j_ - edge.i_));
   features->set_value(letters_sqrt_, sqrt(edge.j_ - edge.i_));
   const WordID word = edge.rule_->e_[1];
   const char* sword = TD::Convert(word).c_str();
@@ -117,10 +143,14 @@ void BasicCSplitFeaturesImpl::TraversalFeaturesImpl(
     features->set_value(in_dict_, 1.0);
     if (subword) features->set_value(in_dict_sub_word_, 1.0);
   } else {
+    if (!subword) features->set_value(in_dict_full_word_, 1.0);
     features->set_value(oov_, 1.0);
     if (subword) features->set_value(oov_sub_word_, 1.0);
     freq = 99.0f;
   }
+  const unordered_map<WordID, int>::const_iterator it = special_feats_.find(word);
+  if (it != special_feats_.end())
+    features->set_value(it->second, 1.0);
   if (bad_words_.count(word) != 0)
     features->set_value(bad_, 1.0);
   if (chars < 5)
@@ -139,6 +169,8 @@ void BasicCSplitFeaturesImpl::TraversalFeaturesImpl(
   features->set_value(fl2_, freq / chars);
 }
 
+void BasicCSplitFeatures::PrepareForInput(const SentenceMetadata& smeta) {}
+
 void BasicCSplitFeatures::TraversalFeaturesImpl(
                                      const SentenceMetadata& smeta,
                                      const Hypergraph::Edge& edge,
diff --git a/decoder/ff_csplit.h b/decoder/ff_csplit.h
index 64d42526..79bf2886 100644
--- a/decoder/ff_csplit.h
+++ b/decoder/ff_csplit.h
@@ -10,6 +10,7 @@ class BasicCSplitFeaturesImpl;
 class BasicCSplitFeatures : public FeatureFunction {
  public:
   BasicCSplitFeatures(const std::string& param);
+  virtual void PrepareForInput(const SentenceMetadata& smeta);
  protected:
   virtual void TraversalFeaturesImpl(const SentenceMetadata& smeta,
                                      const HG::Edge& edge,
-- 
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