From 9308fcdbdbe6564d25fb848139d3f55254d491be Mon Sep 17 00:00:00 2001
From: Kenneth Heafield <kenlm@kheafield.com>
Date: Sun, 26 Jun 2011 18:40:15 -0400
Subject: Quantization

---
 klm/lm/vocab.cc | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

(limited to 'klm/lm/vocab.cc')

diff --git a/klm/lm/vocab.cc b/klm/lm/vocab.cc
index 515af5db..7defd5c1 100644
--- a/klm/lm/vocab.cc
+++ b/klm/lm/vocab.cc
@@ -28,8 +28,8 @@ const uint64_t kUnknownHash = detail::HashForVocab("<unk>", 5);
 // Sadly some LMs have <UNK>.  
 const uint64_t kUnknownCapHash = detail::HashForVocab("<UNK>", 5);
 
-void ReadWords(int fd, EnumerateVocab *enumerate) {
-  if (!enumerate) return;
+WordIndex ReadWords(int fd, EnumerateVocab *enumerate) {
+  if (!enumerate) return std::numeric_limits<WordIndex>::max();
   const std::size_t kInitialRead = 16384;
   std::string buf;
   buf.reserve(kInitialRead + 100);
@@ -38,7 +38,7 @@ void ReadWords(int fd, EnumerateVocab *enumerate) {
   while (true) {
     ssize_t got = read(fd, &buf[0], kInitialRead);
     if (got == -1) UTIL_THROW(util::ErrnoException, "Reading vocabulary words");
-    if (got == 0) return;
+    if (got == 0) return index;
     buf.resize(got);
     while (buf[buf.size() - 1]) {
       char next_char;
@@ -87,13 +87,13 @@ SortedVocabulary::SortedVocabulary() : begin_(NULL), end_(NULL), enumerate_(NULL
 
 std::size_t SortedVocabulary::Size(std::size_t entries, const Config &/*config*/) {
   // Lead with the number of entries.  
-  return sizeof(uint64_t) + sizeof(Entry) * entries;
+  return sizeof(uint64_t) + sizeof(uint64_t) * entries;
 }
 
 void SortedVocabulary::SetupMemory(void *start, std::size_t allocated, std::size_t entries, const Config &config) {
   assert(allocated >= Size(entries, config));
   // Leave space for number of entries.  
-  begin_ = reinterpret_cast<Entry*>(reinterpret_cast<uint64_t*>(start) + 1);
+  begin_ = reinterpret_cast<uint64_t*>(start) + 1;
   end_ = begin_;
   saw_unk_ = false;
 }
@@ -112,7 +112,7 @@ WordIndex SortedVocabulary::Insert(const StringPiece &str) {
     saw_unk_ = true;
     return 0;
   }
-  end_->key = hashed;
+  *end_ = hashed;
   if (enumerate_) {
     strings_to_enumerate_[end_ - begin_].assign(str.data(), str.size());
   }
@@ -134,8 +134,10 @@ void SortedVocabulary::FinishedLoading(ProbBackoff *reorder_vocab) {
     util::JointSort(begin_, end_, reorder_vocab + 1);
   }
   SetSpecial(Index("<s>"), Index("</s>"), 0);
-  // Save size.  
+  // Save size.  Excludes UNK.  
   *(reinterpret_cast<uint64_t*>(begin_) - 1) = end_ - begin_;
+  // Includes UNK.
+  bound_ = end_ - begin_ + 1;
 }
 
 void SortedVocabulary::LoadedBinary(int fd, EnumerateVocab *to) {
@@ -183,7 +185,7 @@ void ProbingVocabulary::FinishedLoading(ProbBackoff * /*reorder_vocab*/) {
 
 void ProbingVocabulary::LoadedBinary(int fd, EnumerateVocab *to) {
   lookup_.LoadedBinary();
-  ReadWords(fd, to);
+  available_ = ReadWords(fd, to);
   SetSpecial(Index("<s>"), Index("</s>"), 0);
 }
 
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