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author | Avneesh Saluja <asaluja@gmail.com> | 2013-03-28 18:28:16 -0700 |
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committer | Avneesh Saluja <asaluja@gmail.com> | 2013-03-28 18:28:16 -0700 |
commit | 3d8d656fa7911524e0e6885647173474524e0784 (patch) | |
tree | 81b1ee2fcb67980376d03f0aa48e42e53abff222 /decoder/ff_source_path.cc | |
parent | be7f57fdd484e063775d7abf083b9fa4c403b610 (diff) | |
parent | 96fedabebafe7a38a6d5928be8fff767e411d705 (diff) |
fixed conflicts
Diffstat (limited to 'decoder/ff_source_path.cc')
-rw-r--r-- | decoder/ff_source_path.cc | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/decoder/ff_source_path.cc b/decoder/ff_source_path.cc new file mode 100644 index 00000000..2a3bee2e --- /dev/null +++ b/decoder/ff_source_path.cc @@ -0,0 +1,42 @@ +#include "ff_source_path.h" + +#include "hg.h" + +using namespace std; + +SourcePathFeatures::SourcePathFeatures(const string& param) : FeatureFunction(sizeof(int)) {} + +void SourcePathFeatures::FireBigramFeature(WordID prev, WordID cur, SparseVector<double>* features) const { + int& fid = bigram_fids[prev][cur]; + if (!fid) fid = FD::Convert("SB:"+TD::Convert(prev) + "_" + TD::Convert(cur)); + if (fid) features->add_value(fid, 1.0); +} + +void SourcePathFeatures::FireUnigramFeature(WordID cur, SparseVector<double>* features) const { + int& fid = unigram_fids[cur]; + if (!fid) fid = FD::Convert("SU:" + TD::Convert(cur)); + if (fid) features->add_value(fid, 1.0); +} + +void SourcePathFeatures::TraversalFeaturesImpl(const SentenceMetadata& smeta, + const HG::Edge& edge, + const vector<const void*>& ant_contexts, + SparseVector<double>* features, + SparseVector<double>* estimated_features, + void* context) const { + WordID* res = reinterpret_cast<WordID*>(context); + const vector<int>& f = edge.rule_->f(); + int prev = 0; + unsigned ntc = 0; + for (unsigned i = 0; i < f.size(); ++i) { + int cur = f[i]; + if (cur < 0) + cur = *reinterpret_cast<const WordID*>(ant_contexts[ntc++]); + else + FireUnigramFeature(cur, features); + if (prev) FireBigramFeature(prev, cur, features); + prev = cur; + } + *res = prev; +} + |