initial check in

1 files changed, 34 insertions, 0 deletions

diff --git a/src/phrasetable_fst.h b/src/phrasetable_fst.h
new file mode 100644
index 00000000..477de1f7
--- /dev/null
+++ b/src/phrasetable_fst.h
@@ -0,0 +1,34 @@
+#ifndef _PHRASETABLE_FST_H_
+#define _PHRASETABLE_FST_H_
+
+#include <vector>
+#include <string>
+
+#include "sparse_vector.h"
+#include "trule.h"
+
+class TargetPhraseSet {
+ public:
+  virtual ~TargetPhraseSet();
+  virtual const std::vector<TRulePtr>& GetRules() const = 0;
+};
+
+class FSTNode {
+ public:
+  virtual ~FSTNode();
+  virtual const TargetPhraseSet* GetTranslations() const = 0;
+  virtual bool HasData() const = 0;
+  virtual bool HasOutgoingNonEpsilonEdges() const = 0;
+  virtual const FSTNode* Extend(const WordID& t) const = 0;
+
+  // these should only be called on q_0:
+  virtual void AddPassThroughTranslation(const WordID& w, const SparseVector<double>& feats) = 0;
+  virtual void ClearPassThroughTranslations() = 0;
+};
+
+// attn caller: you own the memory
+FSTNode* LoadTextPhrasetable(const std::vector<std::string>& filenames);
+FSTNode* LoadTextPhrasetable(std::istream* in);
+FSTNode* LoadBinaryPhrasetable(const std::string& fname_prefix);
+
+#endif