1 files changed, 154 insertions, 0 deletions
diff --git a/utils/tdict.cc b/utils/tdict.cc
new file mode 100644
index 00000000..1f68feae
--- /dev/null
+++ b/utils/tdict.cc
@@ -0,0 +1,154 @@
+#define TD_ALLOW_UNDEFINED_WORDIDS 0
+
+// if 1, word ids that are >= end() will give a numeric token name (single per-thread shared buffer), which of course won't be Convert-able back to the id, because it's not added to the dict.  This is a convenience for logging fake token indices.  Any tokens actually added to the dict may cause end() to overlap the range of fake ids you were using - that's up to you to prevent.
+
+#include <stdlib.h>
+#include <cstring>
+#include <sstream>
+#include "Ngram.h"
+#include "dict.h"
+#include "tdict.h"
+#include "Vocab.h"
+#include "stringlib.h"
+#include "threadlocal.h"
+
+using namespace std;
+
+Vocab TD::dict_(0,TD::max_wordid);
+WordID TD::ss=dict_.ssIndex();
+WordID TD::se=dict_.seIndex();
+WordID TD::unk=dict_.unkIndex();
+char const*const TD::ss_str=Vocab_SentStart;
+char const*const TD::se_str=Vocab_SentEnd;
+char const*const TD::unk_str=Vocab_Unknown;
+
+// pre+(i-base)+">" for i in [base,e)
+inline void pad(std::string const& pre,int base,int e) {
+  assert(base<=e);
+  ostringstream o;
+  for (int i=base;i<e;++i) {
+    o.str(pre);
+    o<<(i-base)<<'>';
+    WordID id=TD::Convert(o.str());
+    assert(id==i); // this fails.  why?
+  }
+}
+
+
+namespace {
+struct TD_init {
+  TD_init() {
+    /*
+      // disabled for now since it's breaking trunk
+    assert(TD::Convert(TD::ss_str)==TD::ss);
+    assert(TD::Convert(TD::se_str)==TD::se);
+    assert(TD::Convert(TD::unk_str)==TD::unk);
+    assert(TD::none==Vocab_None);
+    pad("<FILLER",TD::end(),TD::reserved_begin);
+    assert(TD::end()==TD::reserved_begin);
+    int reserved_end=TD::begin();
+    pad("<RESERVED",TD::end(),reserved_end);
+    assert(TD::end()==reserved_end);
+    */
+  }
+};
+
+TD_init td_init;
+}
+
+unsigned int TD::NumWords() {
+  return dict_.numWords();
+}
+WordID TD::end() {
+  return dict_.highIndex();
+}
+
+WordID TD::Convert(const std::string& s) {
+  return dict_.addWord((VocabString)s.c_str());
+}
+
+WordID TD::Convert(char const* s) {
+  return dict_.addWord((VocabString)s);
+}
+
+
+#if TD_ALLOW_UNDEFINED_WORDIDS
+# include "static_utoa.h"
+char undef_prefix[]="UNDEF_";
+static const int undefpre_n=sizeof(undef_prefix)/sizeof(undef_prefix[0]);
+THREADLOCAL char undef_buf[]="UNDEF_________________";
+inline char const* undef_token(WordID w)
+{
+  append_utoa(undef_buf+undefpre_n,w);
+  return undef_buf;
+}
+#endif
+
+const char* TD::Convert(WordID w) {
+#if TD_ALLOW_UNDEFINED_WORDIDS
+  if (w>=dict_.highIndex()) return undef_token(w);
+#endif
+  return dict_.getWord((VocabIndex)w);
+}
+
+
+void TD::GetWordIDs(const std::vector<std::string>& strings, std::vector<WordID>* ids) {
+  ids->clear();
+  for (vector<string>::const_iterator i = strings.begin(); i != strings.end(); ++i)
+    ids->push_back(TD::Convert(*i));
+}
+
+std::string TD::GetString(const std::vector<WordID>& str) {
+  ostringstream o;
+  for (int i=0;i<str.size();++i) {
+    if (i) o << ' ';
+    o << TD::Convert(str[i]);
+  }
+  return o.str();
+}
+
+std::string TD::GetString(WordID const* i,WordID const* e) {
+  ostringstream o;
+  bool sp=false;
+  for (;i<e;++i,sp=true) {
+    if (sp)
+      o << ' ';
+    o << TD::Convert(*i);
+  }
+  return o.str();
+}
+
+int TD::AppendString(const WordID& w, int pos, int bufsize, char* buffer)
+{
+  const char* word = TD::Convert(w);
+  const char* const end_buf = buffer + bufsize;
+  char* dest = buffer + pos;
+  while(dest < end_buf && *word) {
+    *dest = *word;
+    ++dest;
+    ++word;
+  }
+  return (dest - buffer);
+}
+
+
+namespace {
+struct add_wordids {
+  typedef std::vector<WordID> Ws;
+  Ws *ids;
+  explicit add_wordids(Ws *i) : ids(i) {  }
+  add_wordids(const add_wordids& o) : ids(o.ids) {  }
+  void operator()(char const* s) {
+    ids->push_back(TD::Convert(s));
+  }
+  void operator()(std::string const& s) {
+    ids->push_back(TD::Convert(s));
+  }
+};
+
+}
+
+void TD::ConvertSentence(std::string const& s, std::vector<WordID>* ids) {
+  ids->clear();
+  VisitTokens(s,add_wordids(ids));
+}