1 files changed, 66 insertions, 0 deletions
diff --git a/utils/dict.h b/utils/dict.h
new file mode 100644
index 00000000..348a97e3
--- /dev/null
+++ b/utils/dict.h
@@ -0,0 +1,66 @@
+#ifndef DICT_H_
+#define DICT_H_
+
+
+#include <cassert>
+#include <cstring>
+
+#include <string>
+#include <vector>
+#include "hash.h"
+#include "wordid.h"
+
+class Dict {
+ typedef
+ HASH_MAP<std::string, WordID, boost::hash<std::string> > Map;
+ public:
+  Dict() : b0_("<bad0>") {
+    HASH_MAP_EMPTY(d_,"<bad1>");
+    words_.reserve(1000);
+  }
+
+  inline int max() const { return words_.size(); }
+
+  inline WordID Convert(const std::string& word, bool frozen = false) {
+    Map::iterator i = d_.find(word);
+    if (i == d_.end()) {
+      if (frozen)
+        return 0;
+      words_.push_back(word);
+      d_[word] = words_.size();
+      return words_.size();
+    } else {
+      return i->second;
+    }
+  }
+
+  inline WordID Convert(const std::vector<std::string>& words, bool frozen = false)
+  { return Convert(toString(words), frozen); }
+
+  static inline std::string toString(const std::vector<std::string>& words) {
+    std::string word= "";
+    for (std::vector<std::string>::const_iterator it=words.begin();
+         it != words.end(); ++it) {
+      if (it != words.begin()) word += " ||| ";
+      word += *it;
+    }
+    return word;
+  }
+
+  inline const std::string& Convert(const WordID& id) const {
+    if (id == 0) return b0_;
+    assert(id <= (int)words_.size());
+    return words_[id-1];
+  }
+
+  void AsVector(const WordID& id, std::vector<std::string>* results) const;
+
+  void clear() { words_.clear(); d_.clear(); }
+
+ private:
+  const std::string b0_;
+  std::vector<std::string> words_;
+  Map d_;
+};
+
+#endif