4 files changed, 27 insertions, 0 deletions
diff --git a/decoder/decoder.cc b/decoder/decoder.cc
index 69fbaf85..53c47d21 100644
--- a/decoder/decoder.cc
+++ b/decoder/decoder.cc
@@ -735,6 +735,10 @@ void Decoder::SetSupplementalGrammar(const std::string& grammar_string) {
   assert(pimpl_->translator->GetDecoderType() == "SCFG");
   static_cast<SCFGTranslator&>(*pimpl_->translator).SetSupplementalGrammar(grammar_string);
 }
+void Decoder::SetSentenceGrammarFromString(const std::string& grammar_str) {
+  assert(pimpl_->translator->GetDecoderType() == "SCFG");
+  static_cast<SCFGTranslator&>(*pimpl_->translator).SetSentenceGrammarFromString(grammar_str);
+}
 
 
 bool DecoderImpl::Decode(const string& input, DecoderObserver* o) {
diff --git a/decoder/decoder.h b/decoder/decoder.h
index 9d009ffa..6b2f7b16 100644
--- a/decoder/decoder.h
+++ b/decoder/decoder.h
@@ -55,6 +55,7 @@ struct Decoder {
   // that will be used on subsequent calls to Decode. rules should be in standard
   // text format. This function does NOT read from a file.
   void SetSupplementalGrammar(const std::string& grammar);
+  void SetSentenceGrammarFromString(const std::string& grammar_str);
  private:
   boost::program_options::variables_map conf;
   boost::shared_ptr<DecoderImpl> pimpl_;
diff --git a/decoder/scfg_translator.cc b/decoder/scfg_translator.cc
index d978d8b9..646d67fa 100644
--- a/decoder/scfg_translator.cc
+++ b/decoder/scfg_translator.cc
@@ -103,6 +103,21 @@ struct SCFGTranslatorImpl {
     grammars.push_back(sup_grammar_);
   }
 
+  struct NameEquals { NameEquals(const string name) : name_(name) {}
+                      bool operator()(const GrammarPtr& x) const { return x->GetGrammarName() == name_; } const string name_; };
+
+  void SetSentenceGrammarFromString(const std::string& grammar_str) {
+    assert( grammar_str != "" );
+    if (!SILENT) cerr << "Setting sentence grammar" << endl;
+    usingSentenceGrammar = true;
+    istringstream in( grammar_str );
+    TextGrammar* sent_grammar = new TextGrammar( &in );
+    sent_grammar->SetMaxSpan( max_span_limit );
+    sent_grammar->SetGrammarName( "__psg" );
+    grammars.erase ( remove_if(grammars.begin(), grammars.end(), NameEquals("__psg")), grammars.end() );
+    grammars.push_back( GrammarPtr(sent_grammar) );
+  }
+
   bool Translate(const string& input,
                  SentenceMetadata* smeta,
                  const vector<double>& weights,
@@ -304,6 +319,10 @@ void SCFGTranslator::SetSupplementalGrammar(const std::string& grammar) {
   pimpl_->SetSupplementalGrammar(grammar);
 }
 
+void SCFGTranslator::SetSentenceGrammarFromString(const std::string& grammar_str) {
+  pimpl_->SetSentenceGrammarFromString(grammar_str);
+}
+
 void SCFGTranslator::SentenceCompleteImpl() {
 
   if(usingSentenceGrammar)      // Drop the last sentence grammar from the list of grammars
diff --git a/decoder/translator.h b/decoder/translator.h
index 9d6dd97d..cfd3b08a 100644
--- a/decoder/translator.h
+++ b/decoder/translator.h
@@ -7,6 +7,8 @@
 #include <boost/shared_ptr.hpp>
 #include <boost/program_options/variables_map.hpp>
 
+#include "grammar.h"
+
 class Hypergraph;
 class SentenceMetadata;
 
@@ -57,6 +59,7 @@ class SCFGTranslator : public Translator {
  public:
   SCFGTranslator(const boost::program_options::variables_map& conf);
   void SetSupplementalGrammar(const std::string& grammar);
+  void SetSentenceGrammarFromString(const std::string& grammar);
   virtual std::string GetDecoderType() const;
  protected:
   bool TranslateImpl(const std::string& src,