Update files

cpp/thirdpart/ctc_decoder/ctc_beam_search_decoder.cpp

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "ctc_beam_search_decoder.h"
+#include <algorithm>
+#include <cmath>
+#include <future>
+#include <iostream>
+#include <limits>
+#include <map>
+#include <utility>
+#include "ThreadPool/ThreadPool.h"
+#include "decoder_utils.h"
+#include "fst/fstlib.h"
+#include "path_trie.h"
+
+using FSTMATCH = fst::SortedMatcher<fst::StdVectorFst>;
+std::vector<std::pair<double, std::vector<int>>> ctc_beam_search_decoder(
+    const std::vector<std::vector<double>> &log_probs_seq,
+    const std::vector<std::vector<int>> &log_probs_idx, PathTrie &root,
+    const bool start, size_t beam_size, int blank_id, int space_id,
+    double cutoff_prob, Scorer *ext_scorer) {
+  if (start) {
+    if (ext_scorer != nullptr && !ext_scorer->is_character_based()) {
+      auto fst_dict = static_cast<fst::StdVectorFst *>(ext_scorer->dictionary);
+      fst::StdVectorFst *dict_ptr = fst_dict->Copy(true);
+      root.set_dictionary(dict_ptr);
+      auto matcher = std::make_shared<FSTMATCH>(*dict_ptr, fst::MATCH_INPUT);
+      root.set_matcher(matcher);
+    }
+  }
+  int timesteps = log_probs_seq.size();
+
+  std::vector<PathTrie *> prefixes;
+
+  // update log probs
+  if (root.log_prob_b_prev == -NUM_FLT_INF && start) {
+    root.score = root.log_prob_b_prev = 0.0;
+  }
+  root.iterate_to_vec_only(prefixes);
+  int prev_id = -1;
+  // prefix search over time
+  for (size_t time_step = 0; time_step < timesteps; ++time_step) {
+    float min_cutoff = -NUM_FLT_INF;
+    bool full_beam = false;
+
+    auto &log_prob = log_probs_seq[time_step];
+    auto &log_prob_idx = log_probs_idx[time_step];
+
+    double top_prob = exp(log_prob[0]);
+    auto top_id = log_prob_idx[0];
+    if (top_prob >= cutoff_prob && top_id == blank_id)
+      if (prev_id == blank_id) {
+        continue;  // skip this round
+      } else
+        prev_id = top_id;
+    else
+      prev_id = -1;
+
+    // loop over chars
+    double cur_acc_prob = 0.0;
+    for (size_t index = 0; index < log_prob.size(); index++) {
+      auto c = log_prob_idx[index];
+      float log_prob_c = log_prob[index];
+      cur_acc_prob += exp(log_prob_c);
+      if (cur_acc_prob > cutoff_prob && index >= 1) break;
+      for (size_t i = 0; i < prefixes.size() && i < beam_size; ++i) {
+        auto prefix = prefixes[i];
+        if (full_beam && log_prob_c + prefix->score < min_cutoff) {
+          break;
+        }
+        // blank
+        if (c == blank_id) {
+          prefix->log_prob_b_cur =
+              log_sum_exp(prefix->log_prob_b_cur, log_prob_c + prefix->score);
+          continue;
+        }
+        // repeated character
+        if (c == prefix->character) {
+          prefix->log_prob_nb_cur = log_sum_exp(
+              prefix->log_prob_nb_cur, log_prob_c + prefix->log_prob_nb_prev);
+        }
+        // get new prefix
+        auto prefix_new = prefix->get_path_trie(c);
+        if (prefix_new != nullptr) {
+          float log_p = -NUM_FLT_INF;
+
+          if (c == prefix->character &&
+              prefix->log_prob_b_prev > -NUM_FLT_INF) {
+            log_p = log_prob_c + prefix->log_prob_b_prev;
+          } else if (c != prefix->character) {
+            log_p = log_prob_c + prefix->score;
+          }
+
+          // language model scoring
+          if (ext_scorer != nullptr &&
+              (c == space_id || ext_scorer->is_character_based())) {
+            PathTrie *prefix_to_score = nullptr;
+            // skip scoring the space
+            if (ext_scorer->is_character_based()) {
+              prefix_to_score = prefix_new;
+            } else {
+              prefix_to_score = prefix;
+            }
+            float score = 0.0;
+            std::vector<std::string> ngram;
+            ngram = ext_scorer->make_ngram(prefix_to_score);
+            score = ext_scorer->get_log_cond_prob(ngram) * ext_scorer->alpha;
+            log_p += score;
+            log_p += ext_scorer->beta;
+          }
+
+          prefix_new->log_prob_nb_cur =
+              log_sum_exp(prefix_new->log_prob_nb_cur, log_p);
+        }
+      }  // end of loop over prefix
+    }    // end of loop over vocabulary
+    prefixes.clear();
+    // update log probs
+    root.iterate_to_vec(prefixes);
+    // only preserve top beam_size prefixes
+    if (prefixes.size() >= beam_size) {
+      std::nth_element(prefixes.begin(), prefixes.begin() + beam_size,
+                       prefixes.end(), prefix_compare);
+      for (size_t i = beam_size; i < prefixes.size(); ++i) {
+        prefixes[i]->remove();
+      }
+    }
+  }  // end of loop over time
+  size_t num_prefixes = std::min(prefixes.size(), beam_size);
+  std::sort(prefixes.begin(), prefixes.begin() + num_prefixes, prefix_compare);
+  return get_beam_search_result(prefixes, beam_size);
+}
+
+std::string map_sent(const std::vector<int> &sent,
+                     const std::vector<std::string> &vocabulary, bool greedy,
+                     int blank_id) {
+  std::string output_str;
+
+  if (!greedy) {
+    for (size_t j = 0; j < sent.size(); j++) {
+      output_str += vocabulary[sent[j]];
+    }
+  } else {
+    // greedy search
+    int prev = -1;
+    for (size_t i = 0; i < sent.size(); i++) {
+      int cur = sent[i];
+      if (cur != prev && cur != blank_id) output_str += vocabulary[cur];
+      prev = cur;
+    }
+  }
+  return output_str;
+}
+
+std::vector<std::string> map_batch(
+    const std::vector<std::vector<int>> &batch_sents,
+    const std::vector<std::string> &vocabulary, size_t num_processes,
+    bool greedy, int blank_id) {
+  ThreadPool pool(num_processes);
+  size_t batch_size = batch_sents.size();
+  std::vector<std::future<std::string>> res;
+  for (size_t i = 0; i < batch_size; ++i) {
+    res.emplace_back(pool.enqueue(map_sent, std::ref(batch_sents[i]),
+                                  std::ref(vocabulary), greedy, blank_id));
+  }
+  // get decoding results
+  std::vector<std::string> batch_results;
+  for (size_t i = 0; i < batch_size; ++i) {
+    batch_results.emplace_back(res[i].get());
+  }
+  return batch_results;
+}
+
+std::vector<std::vector<std::pair<double, std::vector<int>>>>
+ctc_beam_search_decoder_batch(
+    const std::vector<std::vector<std::vector<double>>> &batch_log_probs_seq,
+    const std::vector<std::vector<std::vector<int>>> &batch_log_probs_idx,
+    std::vector<PathTrie *> &batch_root_trie,
+    const std::vector<bool> &batch_start, size_t beam_size,
+    size_t num_processes, int blank_id, int space_id, double cutoff_prob,
+    Scorer *ext_scorer) {
+  // thread pool
+  ThreadPool pool(num_processes);
+  // number of samples
+  size_t batch_size = batch_log_probs_seq.size();
+
+  // enqueue the tasks of decoding
+
+  std::vector<std::future<std::vector<std::pair<double, std::vector<int>>>>>
+      res;
+
+  for (size_t i = 0; i < batch_size; ++i) {
+    res.emplace_back(
+        pool.enqueue(ctc_beam_search_decoder, std::ref(batch_log_probs_seq[i]),
+                     std::ref(batch_log_probs_idx[i]),
+                     std::ref(*batch_root_trie[i]), batch_start[i], beam_size,
+                     blank_id, space_id, cutoff_prob, ext_scorer));
+  }
+
+  // get decoding results
+  std::vector<std::vector<std::pair<double, std::vector<int>>>> batch_results;
+  for (size_t i = 0; i < batch_size; ++i) {
+    batch_results.emplace_back(res[i].get());
+  }
+  return batch_results;
+}

cpp/thirdpart/ctc_decoder/ctc_beam_search_decoder.h

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CTC_BEAM_SEARCH_DECODER_H_
+#define CTC_BEAM_SEARCH_DECODER_H_
+
+#include <string>
+#include <utility>
+#include <vector>
+#include "path_trie.h"
+#include "scorer.h"
+
+/* CTC Beam Search Decoder
+
+ * Parameters:
+ *     log_probs_seq: 2-D vector that each element is a vector of log
+ probabilities
+ *                    for one time step, it is sorted   (topk)
+ *     log_probs_idx: 2-D vector that the index of every element in
+ log_probs_seq
+ *                     topk index
+ *     root: A PathTrie root
+ *     start: whether this the first chunk of this sequence
+ *     beam_size: The width of beam search.
+ *     blank_id: default is 0
+ *     space_id: default is -1
+ *     cutoff_prob: Cutoff probability for pruning.
+ *     ext_scorer: External scorer to evaluate a prefix, which consists of
+ *                 n-gram language model scoring and word insertion term.
+ *                 Default null, decoding the input sample without scorer.
+ * Return:
+ *     A vector that each element is a pair of score  and decoding result,
+ *     in desending order.
+*/
+std::vector<std::pair<double, std::vector<int>>> ctc_beam_search_decoder(
+    const std::vector<std::vector<double>> &log_probs_seq,
+    const std::vector<std::vector<int>> &log_probs_idx, PathTrie &root,
+    const bool start, size_t beam_size, int blank_id = 0, int space_id = -1,
+    double cutoff_prob = 0.999, Scorer *ext_scorer = nullptr);
+
+/* CTC Beam Search Decoder for batch data
+
+ * Parameters:
+ *     batch_log_probs_seq: 3-D vector that each element is a 2-D vector that
+ can be used
+ *                by ctc_beam_search_decoder().
+ *     batch_log_probs_idx: 3-D vector that each element is a 2-D vector that
+ can be used
+ *                by ctc_beam_search_decoder().
+ *     batch_root_trie: a batch of Path trie for each sequence
+ *     batch_start: a batch of boolean value to indicate whether this is the
+ first
+ *                  chunk of each sequence
+ *     beam_size: The width of beam search.
+ *     num_processes: Number of threads for beam search.
+ *     blank_id: default blank_id is 0
+ *     space_id: default space_id is -1, this is for word based scorer
+ *     cutoff_prob: Cutoff probability for pruning.
+ *     ext_scorer: External scorer to evaluate a prefix, which consists of
+ *                 n-gram language model scoring and word insertion term.
+ *                 Default null, decoding the input sample without scorer.
+ * Return:
+ *     A 2-D vector that each element is a vector of beam search decoding
+ *     result for one audio sample.
+*/
+std::vector<std::vector<std::pair<double, std::vector<int>>>>
+ctc_beam_search_decoder_batch(
+    const std::vector<std::vector<std::vector<double>>> &batch_log_probs_seq,
+    const std::vector<std::vector<std::vector<int>>> &batch_log_probs_idx,
+    std::vector<PathTrie *> &batch_root_trie,
+    const std::vector<bool> &batch_start, size_t beam_size,
+    size_t num_processes, int blank_id = 0, int space_id = -1,
+    double cutoff_prob = 0.999, Scorer *ext_scorer = nullptr);
+
+/* Map vector of int to string
+
+ * Parameters:
+ *   sent: a vector of int ids
+ *   vocabulary: vocabulary
+ * Return:
+ *   A decoded string
+*/
+std::string map_sent(const std::vector<int> &sent,
+                     const std::vector<std::string> &vocabulary,
+                     bool greedy = false, int blank_id = 0);
+
+/* Map batch vector of int to string
+
+ * Parameters:
+ *   batch_sents: a batch of vector of int ids
+ *   vocabulary: vocabulary
+ *   num_processes: number of processes to use
+ * Return:
+ *   A vector decoded string
+*/
+std::vector<std::string> map_batch(
+    const std::vector<std::vector<int>> &batch_sents,
+    const std::vector<std::string> &vocabulary, size_t num_processes,
+    bool greedy = false, int blank_id = 0);
+
+#endif  // CTC_BEAM_SEARCH_DECODER_H_

cpp/thirdpart/ctc_decoder/decoder_utils.cpp

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "decoder_utils.h"
+
+#include <algorithm>
+#include <cmath>
+#include <limits>
+
+std::vector<std::pair<size_t, float>> get_pruned_log_probs(
+    const std::vector<double> &prob_step, double cutoff_prob,
+    size_t cutoff_top_n) {
+  std::vector<std::pair<int, double>> prob_idx;
+  for (size_t i = 0; i < prob_step.size(); ++i) {
+    prob_idx.push_back(std::pair<int, double>(i, prob_step[i]));
+  }
+  // pruning of vacobulary
+  size_t cutoff_len = prob_step.size();
+  if (cutoff_prob < 1.0 || cutoff_top_n < cutoff_len) {
+    std::sort(prob_idx.begin(), prob_idx.end(),
+              pair_comp_second_rev<int, double>);
+    if (cutoff_prob < 1.0) {
+      double cum_prob = 0.0;
+      cutoff_len = 0;
+      for (size_t i = 0; i < prob_idx.size(); ++i) {
+        cum_prob += prob_idx[i].second;
+        cutoff_len += 1;
+        if (cum_prob >= cutoff_prob || cutoff_len >= cutoff_top_n) break;
+      }
+    }
+    prob_idx = std::vector<std::pair<int, double>>(
+        prob_idx.begin(), prob_idx.begin() + cutoff_len);
+  }
+  std::vector<std::pair<size_t, float>> log_prob_idx;
+  for (size_t i = 0; i < cutoff_len; ++i) {
+    log_prob_idx.push_back(std::pair<int, float>(
+        prob_idx[i].first, log(prob_idx[i].second + NUM_FLT_MIN)));
+  }
+  return log_prob_idx;
+}
+
+std::vector<std::pair<double, std::vector<int>>> get_beam_search_result(
+    const std::vector<PathTrie *> &prefixes, size_t beam_size) {
+  // allow for the post processing
+  std::vector<PathTrie *> space_prefixes;
+  if (space_prefixes.empty()) {
+    for (size_t i = 0; i < beam_size && i < prefixes.size(); ++i) {
+      space_prefixes.push_back(prefixes[i]);
+    }
+  }
+
+  std::sort(space_prefixes.begin(), space_prefixes.end(), prefix_compare);
+  std::vector<std::pair<double, std::vector<int>>> output_vecs;
+  for (size_t i = 0; i < beam_size && i < space_prefixes.size(); ++i) {
+    std::vector<int> output;
+    space_prefixes[i]->get_path_vec(output);
+    // convert index to string
+
+    std::pair<double, std::vector<int>> output_pair(space_prefixes[i]->score,
+                                                    output);
+    output_vecs.emplace_back(output_pair);
+  }
+  return output_vecs;
+}
+
+size_t get_utf8_str_len(const std::string &str) {
+  size_t str_len = 0;
+  for (char c : str) {
+    str_len += ((c & 0xc0) != 0x80);
+  }
+  return str_len;
+}
+
+std::vector<std::string> split_utf8_str(const std::string &str) {
+  std::vector<std::string> result;
+  std::string out_str;
+
+  for (char c : str) {
+    if ((c & 0xc0) != 0x80)  // new UTF-8 character
+    {
+      if (!out_str.empty()) {
+        result.push_back(out_str);
+        out_str.clear();
+      }
+    }
+
+    out_str.append(1, c);
+  }
+  result.push_back(out_str);
+  return result;
+}
+
+std::vector<std::string> split_str(const std::string &s,
+                                   const std::string &delim) {
+  std::vector<std::string> result;
+  std::size_t start = 0, delim_len = delim.size();
+  while (true) {
+    std::size_t end = s.find(delim, start);
+    if (end == std::string::npos) {
+      if (start < s.size()) {
+        result.push_back(s.substr(start));
+      }
+      break;
+    }
+    if (end > start) {
+      result.push_back(s.substr(start, end - start));
+    }
+    start = end + delim_len;
+  }
+  return result;
+}
+
+bool prefix_compare(const PathTrie *x, const PathTrie *y) {
+  if (x->score == y->score) {
+    if (x->character == y->character) {
+      return false;
+    } else {
+      return (x->character < y->character);
+    }
+  } else {
+    return x->score > y->score;
+  }
+}
+
+void add_word_to_fst(const std::vector<int> &word,
+                     fst::StdVectorFst *dictionary) {
+  if (dictionary->NumStates() == 0) {
+    fst::StdVectorFst::StateId start = dictionary->AddState();
+    assert(start == 0);
+    dictionary->SetStart(start);
+  }
+  fst::StdVectorFst::StateId src = dictionary->Start();
+  fst::StdVectorFst::StateId dst;
+  for (auto c : word) {
+    dst = dictionary->AddState();
+    dictionary->AddArc(src, fst::StdArc(c, c, 0, dst));
+    src = dst;
+  }
+  dictionary->SetFinal(dst, fst::StdArc::Weight::One());
+}
+
+bool add_word_to_dictionary(
+    const std::string &word,
+    const std::unordered_map<std::string, int> &char_map, bool add_space,
+    int SPACE_ID, fst::StdVectorFst *dictionary) {
+  auto characters = split_utf8_str(word);
+
+  std::vector<int> int_word;
+
+  for (auto &c : characters) {
+    if (c == " ") {
+      int_word.push_back(SPACE_ID);
+    } else {
+      auto int_c = char_map.find(c);
+      if (int_c != char_map.end()) {
+        int_word.push_back(int_c->second);
+      } else {
+        return false;  // return without adding
+      }
+    }
+  }
+
+  if (add_space) {
+    int_word.push_back(SPACE_ID);
+  }
+
+  add_word_to_fst(int_word, dictionary);
+  return true;  // return with successful adding
+}

cpp/thirdpart/ctc_decoder/decoder_utils.h

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef DECODER_UTILS_H_
+#define DECODER_UTILS_H_
+
+#include <utility>
+#include "fst/log.h"
+#include "path_trie.h"
+
+const float NUM_FLT_INF = std::numeric_limits<float>::max();
+const float NUM_FLT_MIN = std::numeric_limits<float>::min();
+
+// inline function for validation check
+inline void check(bool x, const char *expr, const char *file, int line,
+                  const char *err) {
+  if (!x) {
+    std::cout << "[" << file << ":" << line << "] ";
+    LOG(FATAL) << "\"" << expr << "\" check failed. " << err;
+  }
+}
+
+#define VALID_CHECK(x, info) \
+  check(static_cast<bool>(x), #x, __FILE__, __LINE__, info)
+#define VALID_CHECK_EQ(x, y, info) VALID_CHECK((x) == (y), info)
+#define VALID_CHECK_GT(x, y, info) VALID_CHECK((x) > (y), info)
+#define VALID_CHECK_LT(x, y, info) VALID_CHECK((x) < (y), info)
+
+// Function template for comparing two pairs
+template <typename T1, typename T2>
+bool pair_comp_first_rev(const std::pair<T1, T2> &a,
+                         const std::pair<T1, T2> &b) {
+  return a.first > b.first;
+}
+
+// Function template for comparing two pairs
+template <typename T1, typename T2>
+bool pair_comp_second_rev(const std::pair<T1, T2> &a,
+                          const std::pair<T1, T2> &b) {
+  return a.second > b.second;
+}
+
+// Return the sum of two probabilities in log scale
+template <typename T>
+T log_sum_exp(const T &x, const T &y) {
+  static T num_min = -std::numeric_limits<T>::max();
+  if (x <= num_min) return y;
+  if (y <= num_min) return x;
+  T xmax = std::max(x, y);
+  return std::log(std::exp(x - xmax) + std::exp(y - xmax)) + xmax;
+}
+
+// Get pruned probability vector for each time step's beam search
+std::vector<std::pair<size_t, float>> get_pruned_log_probs(
+    const std::vector<double> &prob_step, double cutoff_prob,
+    size_t cutoff_top_n);
+
+// Get beam search result from prefixes in trie tree
+std::vector<std::pair<double, std::string>> get_beam_search_result(
+    const std::vector<PathTrie *> &prefixes,
+    const std::vector<std::string> &vocabulary, size_t beam_size);
+
+std::vector<std::pair<double, std::vector<int>>> get_beam_search_result(
+    const std::vector<PathTrie *> &prefixes, size_t beam_size);
+
+// Functor for prefix comparsion
+bool prefix_compare(const PathTrie *x, const PathTrie *y);
+
+/* Get length of utf8 encoding string
+ * See: http://stackoverflow.com/a/4063229
+ */
+size_t get_utf8_str_len(const std::string &str);
+
+/* Split a string into a list of strings on a given string
+ * delimiter. NB: delimiters on beginning / end of string are
+ * trimmed. Eg, "FooBarFoo" split on "Foo" returns ["Bar"].
+ */
+std::vector<std::string> split_str(const std::string &s,
+                                   const std::string &delim);
+
+/* Splits string into vector of strings representing
+ * UTF-8 characters (not same as chars)
+ */
+std::vector<std::string> split_utf8_str(const std::string &str);
+
+// Add a word in index to the dicionary of fst
+void add_word_to_fst(const std::vector<int> &word,
+                     fst::StdVectorFst *dictionary);
+
+// Add a word in string to dictionary
+bool add_word_to_dictionary(
+    const std::string &word,
+    const std::unordered_map<std::string, int> &char_map, bool add_space,
+    int SPACE_ID, fst::StdVectorFst *dictionary);
+#endif  // DECODER_UTILS_H

cpp/thirdpart/ctc_decoder/path_trie.cpp

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "path_trie.h"
+
+#include <algorithm>
+#include <limits>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "decoder_utils.h"
+
+PathTrie::PathTrie() {
+  log_prob_b_prev = -NUM_FLT_INF;
+  log_prob_nb_prev = -NUM_FLT_INF;
+  log_prob_b_cur = -NUM_FLT_INF;
+  log_prob_nb_cur = -NUM_FLT_INF;
+  score = -NUM_FLT_INF;
+
+  ROOT_ = -1;
+  character = ROOT_;
+  exists_ = true;
+  parent = nullptr;
+
+  dictionary_ = nullptr;
+  dictionary_state_ = 0;
+  has_dictionary_ = false;
+
+  matcher_ = nullptr;
+}
+
+PathTrie::~PathTrie() {
+  for (auto child : children_) {
+    delete child.second;
+  }
+}
+
+PathTrie* PathTrie::get_path_trie(int new_char, bool reset) {
+  auto child = children_.begin();
+  for (child = children_.begin(); child != children_.end(); ++child) {
+    if (child->first == new_char) {
+      break;
+    }
+  }
+  if (child != children_.end()) {
+    if (!child->second->exists_) {
+      child->second->exists_ = true;
+      child->second->log_prob_b_prev = -NUM_FLT_INF;
+      child->second->log_prob_nb_prev = -NUM_FLT_INF;
+      child->second->log_prob_b_cur = -NUM_FLT_INF;
+      child->second->log_prob_nb_cur = -NUM_FLT_INF;
+    }
+    return (child->second);
+  } else {
+    if (has_dictionary_) {
+      matcher_->SetState(dictionary_state_);
+      bool found = matcher_->Find(new_char + 1);
+      if (!found) {
+        // Adding this character causes word outside dictionary
+        auto FSTZERO = fst::TropicalWeight::Zero();
+        auto final_weight = dictionary_->Final(dictionary_state_);
+        bool is_final = (final_weight != FSTZERO);
+        if (is_final && reset) {
+          dictionary_state_ = dictionary_->Start();
+        }
+        return nullptr;
+      } else {
+        PathTrie* new_path = new PathTrie;
+        new_path->character = new_char;
+        new_path->parent = this;
+        new_path->dictionary_ = dictionary_;
+        new_path->dictionary_state_ = matcher_->Value().nextstate;
+        new_path->has_dictionary_ = true;
+        new_path->matcher_ = matcher_;
+        children_.push_back(std::make_pair(new_char, new_path));
+        return new_path;
+      }
+    } else {
+      PathTrie* new_path = new PathTrie;
+      new_path->character = new_char;
+      new_path->parent = this;
+      children_.push_back(std::make_pair(new_char, new_path));
+      return new_path;
+    }
+  }
+}
+
+PathTrie* PathTrie::get_path_vec(std::vector<int>& output) {
+  return get_path_vec(output, ROOT_);
+}
+
+PathTrie* PathTrie::get_path_vec(std::vector<int>& output, int stop,
+                                 size_t max_steps) {
+  if (character == stop || character == ROOT_ || output.size() == max_steps) {
+    std::reverse(output.begin(), output.end());
+    return this;
+  } else {
+    output.push_back(character);
+    return parent->get_path_vec(output, stop, max_steps);
+  }
+}
+
+void PathTrie::iterate_to_vec_only(std::vector<PathTrie*>& output) {
+  if (exists_) {
+    output.push_back(this);
+  }
+  for (auto child : children_) {
+    child.second->iterate_to_vec_only(output);
+  }
+}
+
+void PathTrie::iterate_to_vec(std::vector<PathTrie*>& output) {
+  if (exists_) {
+    log_prob_b_prev = log_prob_b_cur;
+    log_prob_nb_prev = log_prob_nb_cur;
+
+    log_prob_b_cur = -NUM_FLT_INF;
+    log_prob_nb_cur = -NUM_FLT_INF;
+
+    score = log_sum_exp(log_prob_b_prev, log_prob_nb_prev);
+    output.push_back(this);
+  }
+  for (auto child : children_) {
+    child.second->iterate_to_vec(output);
+  }
+}
+
+void PathTrie::remove() {
+  exists_ = false;
+
+  if (children_.size() == 0) {
+    auto child = parent->children_.begin();
+    for (child = parent->children_.begin(); child != parent->children_.end();
+         ++child) {
+      if (child->first == character) {
+        parent->children_.erase(child);
+        break;
+      }
+    }
+
+    if (parent->children_.size() == 0 && !parent->exists_) {
+      parent->remove();
+    }
+
+    delete this;
+  }
+}
+
+void PathTrie::set_dictionary(fst::StdVectorFst* dictionary) {
+  dictionary_ = dictionary;
+  dictionary_state_ = dictionary->Start();
+  has_dictionary_ = true;
+}
+
+using FSTMATCH = fst::SortedMatcher<fst::StdVectorFst>;
+void PathTrie::set_matcher(std::shared_ptr<FSTMATCH> matcher) {
+  matcher_ = matcher;
+}

cpp/thirdpart/ctc_decoder/path_trie.h

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef PATH_TRIE_H
+#define PATH_TRIE_H
+
+#include <algorithm>
+#include <limits>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "fst/fstlib.h"
+
+/* Trie tree for prefix storing and manipulating, with a dictionary in
+ * finite-state transducer for spelling correction.
+ */
+class PathTrie {
+ public:
+  PathTrie();
+  ~PathTrie();
+
+  // get new prefix after appending new char
+  PathTrie* get_path_trie(int new_char, bool reset = true);
+
+  // get the prefix in index from root to current node
+  PathTrie* get_path_vec(std::vector<int>& output);
+
+  // get the prefix in index from some stop node to current nodel
+  PathTrie* get_path_vec(std::vector<int>& output, int stop,
+                         size_t max_steps = std::numeric_limits<size_t>::max());
+
+  // update log probs
+  void iterate_to_vec(std::vector<PathTrie*>& output);
+
+  void iterate_to_vec_only(std::vector<PathTrie*>& output);
+
+  // set dictionary for FST
+  void set_dictionary(fst::StdVectorFst* dictionary);
+
+  void set_matcher(std::shared_ptr<fst::SortedMatcher<fst::StdVectorFst>>);
+
+  bool is_empty() { return ROOT_ == character; }
+
+  // remove current path from root
+  void remove();
+
+  float log_prob_b_prev;
+  float log_prob_nb_prev;
+  float log_prob_b_cur;
+  float log_prob_nb_cur;
+  float score;
+  float approx_ctc;
+  int character;
+  PathTrie* parent;
+
+ private:
+  int ROOT_;
+  bool exists_;
+  bool has_dictionary_;
+
+  std::vector<std::pair<int, PathTrie*>> children_;
+
+  // pointer to dictionary of FST
+  fst::StdVectorFst* dictionary_;
+  fst::StdVectorFst::StateId dictionary_state_;
+  // true if finding ars in FST
+  std::shared_ptr<fst::SortedMatcher<fst::StdVectorFst>> matcher_;
+};
+
+#endif  // PATH_TRIE_H

cpp/thirdpart/ctc_decoder/scorer.cpp

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "scorer.h"
+
+#include <unistd.h>
+#include <iostream>
+
+#include "lm/config.hh"
+#include "lm/model.hh"
+#include "lm/state.hh"
+#include "util/string_piece.hh"
+#include "util/tokenize_piece.hh"
+
+#include "decoder_utils.h"
+
+using namespace lm::ngram;
+
+Scorer::Scorer(double alpha, double beta, const std::string& lm_path,
+               const std::vector<std::string>& vocab_list) {
+  this->alpha = alpha;
+  this->beta = beta;
+
+  dictionary = nullptr;
+  is_character_based_ = true;
+  language_model_ = nullptr;
+
+  max_order_ = 0;
+  dict_size_ = 0;
+  SPACE_ID_ = -1;
+
+  setup(lm_path, vocab_list);
+}
+
+Scorer::~Scorer() {
+  if (language_model_ != nullptr) {
+    delete static_cast<lm::base::Model*>(language_model_);
+  }
+  if (dictionary != nullptr) {
+    delete static_cast<fst::StdVectorFst*>(dictionary);
+  }
+}
+
+void Scorer::setup(const std::string& lm_path,
+                   const std::vector<std::string>& vocab_list) {
+  // load language model
+  load_lm(lm_path);
+  // set char map for scorer
+  set_char_map(vocab_list);
+  // fill the dictionary for FST
+  if (!is_character_based()) {
+    fill_dictionary(true);
+  }
+}
+
+void Scorer::load_lm(const std::string& lm_path) {
+  const char* filename = lm_path.c_str();
+  VALID_CHECK_EQ(access(filename, F_OK), 0, "Invalid language model path");
+
+  RetriveStrEnumerateVocab enumerate;
+  lm::ngram::Config config;
+  config.enumerate_vocab = &enumerate;
+  language_model_ = lm::ngram::LoadVirtual(filename, config);
+  max_order_ = static_cast<lm::base::Model*>(language_model_)->Order();
+  vocabulary_ = enumerate.vocabulary;
+  for (size_t i = 0; i < vocabulary_.size(); ++i) {
+    if (is_character_based_ && vocabulary_[i] != UNK_TOKEN &&
+        vocabulary_[i] != START_TOKEN && vocabulary_[i] != END_TOKEN &&
+        get_utf8_str_len(enumerate.vocabulary[i]) > 1) {
+      is_character_based_ = false;
+    }
+  }
+}
+
+double Scorer::get_log_cond_prob(const std::vector<std::string>& words) {
+  lm::base::Model* model = static_cast<lm::base::Model*>(language_model_);
+  double cond_prob;
+  lm::ngram::State state, tmp_state, out_state;
+  // avoid to inserting <s> in begin
+  model->NullContextWrite(&state);
+  for (size_t i = 0; i < words.size(); ++i) {
+    lm::WordIndex word_index = model->BaseVocabulary().Index(words[i]);
+    // encounter OOV
+    if (word_index == 0) {
+      return OOV_SCORE;
+    }
+    cond_prob = model->BaseScore(&state, word_index, &out_state);
+    tmp_state = state;
+    state = out_state;
+    out_state = tmp_state;
+  }
+  // return  log10 prob
+  return cond_prob;
+}
+
+double Scorer::get_sent_log_prob(const std::vector<std::string>& words) {
+  std::vector<std::string> sentence;
+  if (words.size() == 0) {
+    for (size_t i = 0; i < max_order_; ++i) {
+      sentence.push_back(START_TOKEN);
+    }
+  } else {
+    for (size_t i = 0; i < max_order_ - 1; ++i) {
+      sentence.push_back(START_TOKEN);
+    }
+    sentence.insert(sentence.end(), words.begin(), words.end());
+  }
+  sentence.push_back(END_TOKEN);
+  return get_log_prob(sentence);
+}
+
+double Scorer::get_log_prob(const std::vector<std::string>& words) {
+  assert(words.size() > max_order_);
+  double score = 0.0;
+  for (size_t i = 0; i < words.size() - max_order_ + 1; ++i) {
+    std::vector<std::string> ngram(words.begin() + i,
+                                   words.begin() + i + max_order_);
+    score += get_log_cond_prob(ngram);
+  }
+  return score;
+}
+
+void Scorer::reset_params(float alpha, float beta) {
+  this->alpha = alpha;
+  this->beta = beta;
+}
+
+std::string Scorer::vec2str(const std::vector<int>& input) {
+  std::string word;
+  for (auto ind : input) {
+    word += char_list_[ind];
+  }
+  return word;
+}
+
+std::vector<std::string> Scorer::split_labels(const std::vector<int>& labels) {
+  if (labels.empty()) return {};
+
+  std::string s = vec2str(labels);
+  std::vector<std::string> words;
+  if (is_character_based_) {
+    words = split_utf8_str(s);
+  } else {
+    words = split_str(s, " ");
+  }
+  return words;
+}
+
+void Scorer::set_char_map(const std::vector<std::string>& char_list) {
+  char_list_ = char_list;
+  char_map_.clear();
+
+  // Set the char map for the FST for spelling correction
+  for (size_t i = 0; i < char_list_.size(); i++) {
+    if (char_list_[i] == " ") {
+      SPACE_ID_ = i;
+    }
+    // The initial state of FST is state 0, hence the index of chars in
+    // the FST should start from 1 to avoid the conflict with the initial
+    // state, otherwise wrong decoding results would be given.
+    char_map_[char_list_[i]] = i + 1;
+  }
+}
+
+std::vector<std::string> Scorer::make_ngram(PathTrie* prefix) {
+  std::vector<std::string> ngram;
+  PathTrie* current_node = prefix;
+  PathTrie* new_node = nullptr;
+
+  for (int order = 0; order < max_order_; order++) {
+    std::vector<int> prefix_vec;
+
+    if (is_character_based_) {
+      new_node = current_node->get_path_vec(prefix_vec, SPACE_ID_, 1);
+      current_node = new_node;
+    } else {
+      new_node = current_node->get_path_vec(prefix_vec, SPACE_ID_);
+      current_node = new_node->parent;  // Skipping spaces
+    }
+
+    // reconstruct word
+    std::string word = vec2str(prefix_vec);
+    ngram.push_back(word);
+
+    if (new_node->character == -1) {
+      // No more spaces, but still need order
+      for (int i = 0; i < max_order_ - order - 1; i++) {
+        ngram.push_back(START_TOKEN);
+      }
+      break;
+    }
+  }
+  std::reverse(ngram.begin(), ngram.end());
+  return ngram;
+}
+
+void Scorer::fill_dictionary(bool add_space) {
+  fst::StdVectorFst dictionary;
+  // For each unigram convert to ints and put in trie
+  int dict_size = 0;
+  for (const auto& word : vocabulary_) {
+    bool added = add_word_to_dictionary(word, char_map_, add_space,
+                                        SPACE_ID_ + 1, &dictionary);
+    dict_size += added ? 1 : 0;
+  }
+
+  dict_size_ = dict_size;
+
+  /* Simplify FST
+
+   * This gets rid of "epsilon" transitions in the FST.
+   * These are transitions that don't require a string input to be taken.
+   * Getting rid of them is necessary to make the FST determinisitc, but
+   * can greatly increase the size of the FST
+   */
+  fst::RmEpsilon(&dictionary);
+  fst::StdVectorFst* new_dict = new fst::StdVectorFst;
+
+  /* This makes the FST deterministic, meaning for any string input there's
+   * only one possible state the FST could be in.  It is assumed our
+   * dictionary is deterministic when using it.
+   * (lest we'd have to check for multiple transitions at each state)
+   */
+  fst::Determinize(dictionary, new_dict);
+
+  /* Finds the simplest equivalent fst. This is unnecessary but decreases
+   * memory usage of the dictionary
+   */
+  fst::Minimize(new_dict);
+  this->dictionary = new_dict;
+}

cpp/thirdpart/ctc_decoder/scorer.h

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef SCORER_H_
+#define SCORER_H_
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "lm/enumerate_vocab.hh"
+#include "lm/virtual_interface.hh"
+#include "lm/word_index.hh"
+#include "util/string_piece.hh"
+
+#include "path_trie.h"
+
+const double OOV_SCORE = -1000.0;
+const std::string START_TOKEN = "<s>";
+const std::string UNK_TOKEN = "<unk>";
+const std::string END_TOKEN = "</s>";
+
+// Implement a callback to retrive the dictionary of language model.
+class RetriveStrEnumerateVocab : public lm::EnumerateVocab {
+ public:
+  RetriveStrEnumerateVocab() {}
+
+  void Add(lm::WordIndex index, const StringPiece &str) {
+    vocabulary.push_back(std::string(str.data(), str.length()));
+  }
+
+  std::vector<std::string> vocabulary;
+};
+
+/* External scorer to query score for n-gram or sentence, including language
+ * model scoring and word insertion.
+ *
+ * Example:
+ *     Scorer scorer(alpha, beta, "path_of_language_model");
+ *     scorer.get_log_cond_prob({ "WORD1", "WORD2", "WORD3" });
+ *     scorer.get_sent_log_prob({ "WORD1", "WORD2", "WORD3" });
+ */
+class Scorer {
+ public:
+  Scorer(double alpha, double beta, const std::string &lm_path,
+         const std::vector<std::string> &vocabulary);
+  ~Scorer();
+
+  double get_log_cond_prob(const std::vector<std::string> &words);
+
+  double get_sent_log_prob(const std::vector<std::string> &words);
+
+  // return the max order
+  size_t get_max_order() const { return max_order_; }
+
+  // return the dictionary size of language model
+  size_t get_dict_size() const { return dict_size_; }
+
+  // retrun true if the language model is character based
+  bool is_character_based() const { return is_character_based_; }
+
+  // reset params alpha & beta
+  void reset_params(float alpha, float beta);
+
+  // make ngram for a given prefix
+  std::vector<std::string> make_ngram(PathTrie *prefix);
+
+  // trransform the labels in index to the vector of words (word based lm) or
+  // the vector of characters (character based lm)
+  std::vector<std::string> split_labels(const std::vector<int> &labels);
+
+  // language model weight
+  double alpha;
+  // word insertion weight
+  double beta;
+
+  // pointer to the dictionary of FST
+  void *dictionary;
+
+ protected:
+  // necessary setup: load language model, set char map, fill FST's dictionary
+  void setup(const std::string &lm_path,
+             const std::vector<std::string> &vocab_list);
+
+  // load language model from given path
+  void load_lm(const std::string &lm_path);
+
+  // fill dictionary for FST
+  void fill_dictionary(bool add_space);
+
+  // set char map
+  void set_char_map(const std::vector<std::string> &char_list);
+
+  double get_log_prob(const std::vector<std::string> &words);
+
+  // translate the vector in index to string
+  std::string vec2str(const std::vector<int> &input);
+
+ private:
+  void *language_model_;
+  bool is_character_based_;
+  size_t max_order_;
+  size_t dict_size_;
+
+  int SPACE_ID_;
+  std::vector<std::string> char_list_;
+  std::unordered_map<std::string, int> char_map_;
+
+  std::vector<std::string> vocabulary_;
+};
+
+#endif  // SCORER_H_

cpp/thirdpart/ctc_decoder/test/test.cpp

+
+#include "path_trie.h"
+#include "scorer.h"
+#include "decoder_utils.h"
+#include "ctc_beam_search_decoder.h"
+
+int main()
+{
+
+
+
+	return 0;
+}
\ No newline at end of file

cpp/thirdpart/kenlm/.gitignore

+util/file_piece.cc.gz
+*.swp
+*.o
+doc/
+build/
+/bin
+/lib
+/tests
+._*
+windows/Win32
+windows/x64
+windows/*.user
+windows/*.sdf
+windows/*.opensdf
+windows/*.suo
+CMakeFiles
+cmake_install.cmake
+CMakeCache.txt
+CTestTestfile.cmake
+DartConfiguration.tcl
+Makefile

cpp/thirdpart/kenlm/BUILDING

+KenLM has switched to cmake
+  cmake .
+  make -j 4
+But they recommend building out of tree
+  mkdir -p build && cd build
+  cmake ..
+  make -j 4
+
+If you only want the query code and do not care about compression (.gz, .bz2, and .xz):
+  ./compile_query_only.sh
+
+Windows:
+  The windows directory has visual studio files.  Note that you need to compile
+  the kenlm project before build_binary and ngram_query projects.  
+
+OSX:
+  Missing dependencies can be remedied with brew.
+  brew install cmake boost eigen
+
+Debian/Ubuntu:
+  sudo apt install build-essential cmake libboost-system-dev libboost-thread-dev libboost-program-options-dev libboost-test-dev libeigen3-dev zlib1g-dev libbz2-dev liblzma-dev

cpp/thirdpart/kenlm/CMakeLists.txt

+cmake_minimum_required(VERSION 3.1)
+
+if (WIN32)
+    set(Boost_USE_STATIC_LIBS OFF)
+    # The auto-linking feature has problems with USE_STATIC_LIBS off, so we use
+    # BOOST_ALL_NO_LIB to turn it off.
+    # Several boost libraries headers aren't configured correctly if
+    # USE_STATIC_LIBS is off, so we explicitly say they are dynamic with the
+    # remaining definitions.
+    add_definitions(-DBOOST_ALL_NO_LIB -DBOOST_PROGRAM_OPTIONS_DYN_LINK -DBOOST_IOSTREAMS_DYN_LINK -DBOOST_THREAD_DYN_LINK)
+endif( )
+
+# Define a single cmake project
+project(kenlm)
+
+option(FORCE_STATIC "Build static executables" OFF)
+option(COMPILE_TESTS "Compile tests" OFF)
+option(ENABLE_PYTHON "Build Python bindings" OFF)
+# Eigen3 less than 3.1.0 has a race condition: http://eigen.tuxfamily.org/bz/show_bug.cgi?id=466
+find_package(Eigen3 3.1.0 CONFIG)
+include(CMakeDependentOption)
+cmake_dependent_option(ENABLE_INTERPOLATE "Build interpolation program (depends on Eigen3)" ON "EIGEN3_FOUND AND NOT WIN32" OFF)
+
+if (FORCE_STATIC)
+  #presumably overkill, is there a better way?
+  #http://cmake.3232098.n2.nabble.com/Howto-compile-static-executable-td5580269.html
+  set(Boost_USE_STATIC_LIBS ON)
+  set_property(GLOBAL PROPERTY LINK_SEARCH_START_STATIC ON)
+  set_property(GLOBAL PROPERTY LINK_SEARCH_END_STATIC ON)
+  set(BUILD_SHARED_LIBRARIES OFF)
+  if (MSVC)
+	set(flag_vars
+	  CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+	  CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO
+	  CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
+	  CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)
+	  foreach(flag_var ${flag_vars})
+	    if(${flag_var} MATCHES "/MD")
+	      string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
+	    endif(${flag_var} MATCHES "/MD")
+	  endforeach(flag_var)
+  else (MSVC)
+    if (NOT CMAKE_C_COMPILER_ID MATCHES ".*Clang")
+      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++ -static")
+    endif ()
+  set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
+  endif ()
+  #Annoyingly the exectuables say "File not found" unless these are set
+  set(CMAKE_EXE_LINK_DYNAMIC_C_FLAGS)
+  set(CMAKE_EXE_LINK_DYNAMIC_CXX_FLAGS)
+  set(CMAKE_SHARED_LIBRARY_C_FLAGS)
+  set(CMAKE_SHARED_LIBRARY_CXX_FLAGS)
+  set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS)
+  set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
+endif ()
+
+# Compile all executables into bin/
+set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
+
+# Compile all libraries into lib/
+set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)
+
+if (NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Release)
+endif()
+
+if (COMPILE_TESTS)
+  # Tell cmake that we want unit tests to be compiled
+  include(CTest)
+  enable_testing()
+endif()
+
+# Add our CMake helper functions
+include(cmake/KenLMFunctions.cmake)
+
+if(MSVC)
+  set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} /w34716")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /w34716")
+endif()
+
+# And our helper modules
+list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/modules)
+
+# We need boost
+find_package(Boost 1.41.0 REQUIRED COMPONENTS
+  program_options
+  system
+  thread
+  unit_test_framework
+)
+
+# Define where include files live
+include_directories(${Boost_INCLUDE_DIRS})
+
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+find_package(Threads REQUIRED)
+
+# Process subdirectories
+add_subdirectory(util)
+add_subdirectory(lm)
+
+if(ENABLE_PYTHON)
+  add_subdirectory(python)
+endif()
+
+# Install targets
+install(EXPORT kenlmTargets
+  FILE kenlmTargets.cmake
+  NAMESPACE kenlm::
+  DESTINATION share/kenlm/cmake
+)
+
+foreach(SUBDIR IN ITEMS util util/double-conversion util/stream lm lm/builder lm/common lm/filter lm/interpolate)
+  file(GLOB HEADERS ${CMAKE_CURRENT_LIST_DIR}/${SUBDIR}/*.h ${CMAKE_CURRENT_LIST_DIR}/${SUBDIR}/*.hh)
+  install(FILES ${HEADERS} DESTINATION include/kenlm/${SUBDIR} COMPONENT headers)
+endforeach(SUBDIR)
+
+# Config
+include(CMakePackageConfigHelpers)
+# generate the config file that is includes the exports
+configure_package_config_file(${PROJECT_SOURCE_DIR}/cmake/kenlmConfig.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/kenlmConfig.cmake"
+  INSTALL_DESTINATION share/kenlm/cmake
+  NO_SET_AND_CHECK_MACRO
+  NO_CHECK_REQUIRED_COMPONENTS_MACRO
+  )
+# install the configuration file
+install(FILES
+  ${CMAKE_CURRENT_BINARY_DIR}/kenlmConfig.cmake
+  DESTINATION share/kenlm/cmake
+  )

cpp/thirdpart/kenlm/COPYING

+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
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+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
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+
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+
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+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+           How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!

cpp/thirdpart/kenlm/COPYING.3

+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+
+                            Preamble
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+
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+
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+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

cpp/thirdpart/kenlm/COPYING.LESSER.3

+		   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.

cpp/thirdpart/kenlm/Doxyfile

+# Doxyfile 1.6.1
+
+# This file describes the settings to be used by the documentation system
+# doxygen (www.doxygen.org) for a project
+#
+# All text after a hash (#) is considered a comment and will be ignored
+# The format is:
+#       TAG = value [value, ...]
+# For lists items can also be appended using:
+#       TAG += value [value, ...]
+# Values that contain spaces should be placed between quotes (" ")
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+
+# This tag specifies the encoding used for all characters in the config file
+# that follow. The default is UTF-8 which is also the encoding used for all
+# text before the first occurrence of this tag. Doxygen uses libiconv (or the
+# iconv built into libc) for the transcoding. See
+# http://www.gnu.org/software/libiconv for the list of possible encodings.
+
+DOXYFILE_ENCODING      = UTF-8
+
+# The PROJECT_NAME tag is a single word (or a sequence of words surrounded
+# by quotes) that should identify the project.
+
+PROJECT_NAME           = KenLM
+
+# The PROJECT_NUMBER tag can be used to enter a project or revision number.
+# This could be handy for archiving the generated documentation or
+# if some version control system is used.
+
+PROJECT_NUMBER         =
+
+# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
+# base path where the generated documentation will be put.
+# If a relative path is entered, it will be relative to the location
+# where doxygen was started. If left blank the current directory will be used.
+
+OUTPUT_DIRECTORY       = doc
+
+# If the CREATE_SUBDIRS tag is set to YES, then doxygen will create
+# 4096 sub-directories (in 2 levels) under the output directory of each output
+# format and will distribute the generated files over these directories.
+# Enabling this option can be useful when feeding doxygen a huge amount of
+# source files, where putting all generated files in the same directory would
+# otherwise cause performance problems for the file system.
+
+CREATE_SUBDIRS         = NO
+
+# The OUTPUT_LANGUAGE tag is used to specify the language in which all
+# documentation generated by doxygen is written. Doxygen will use this
+# information to generate all constant output in the proper language.
+# The default language is English, other supported languages are:
+# Afrikaans, Arabic, Brazilian, Catalan, Chinese, Chinese-Traditional,
+# Croatian, Czech, Danish, Dutch, Esperanto, Farsi, Finnish, French, German,
+# Greek, Hungarian, Italian, Japanese, Japanese-en (Japanese with English
+# messages), Korean, Korean-en, Lithuanian, Norwegian, Macedonian, Persian,
+# Polish, Portuguese, Romanian, Russian, Serbian, Serbian-Cyrilic, Slovak,
+# Slovene, Spanish, Swedish, Ukrainian, and Vietnamese.
+
+OUTPUT_LANGUAGE        = English
+
+# If the BRIEF_MEMBER_DESC tag is set to YES (the default) Doxygen will
+# include brief member descriptions after the members that are listed in
+# the file and class documentation (similar to JavaDoc).
+# Set to NO to disable this.
+
+BRIEF_MEMBER_DESC      = YES
+
+# If the REPEAT_BRIEF tag is set to YES (the default) Doxygen will prepend
+# the brief description of a member or function before the detailed description.
+# Note: if both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the
+# brief descriptions will be completely suppressed.
+
+REPEAT_BRIEF           = YES
+
+# This tag implements a quasi-intelligent brief description abbreviator
+# that is used to form the text in various listings. Each string
+# in this list, if found as the leading text of the brief description, will be
+# stripped from the text and the result after processing the whole list, is
+# used as the annotated text. Otherwise, the brief description is used as-is.
+# If left blank, the following values are used ("$name" is automatically
+# replaced with the name of the entity): "The $name class" "The $name widget"
+# "The $name file" "is" "provides" "specifies" "contains"
+# "represents" "a" "an" "the"
+
+ABBREVIATE_BRIEF       =
+
+# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then
+# Doxygen will generate a detailed section even if there is only a brief
+# description.
+
+ALWAYS_DETAILED_SEC    = YES
+
+# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all
+# inherited members of a class in the documentation of that class as if those
+# members were ordinary class members. Constructors, destructors and assignment
+# operators of the base classes will not be shown.
+
+INLINE_INHERITED_MEMB  = NO
+
+# If the FULL_PATH_NAMES tag is set to YES then Doxygen will prepend the full
+# path before files name in the file list and in the header files. If set
+# to NO the shortest path that makes the file name unique will be used.
+
+FULL_PATH_NAMES        = YES
+
+# If the FULL_PATH_NAMES tag is set to YES then the STRIP_FROM_PATH tag
+# can be used to strip a user-defined part of the path. Stripping is
+# only done if one of the specified strings matches the left-hand part of
+# the path. The tag can be used to show relative paths in the file list.
+# If left blank the directory from which doxygen is run is used as the
+# path to strip.
+
+STRIP_FROM_PATH        =
+
+# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of
+# the path mentioned in the documentation of a class, which tells
+# the reader which header file to include in order to use a class.
+# If left blank only the name of the header file containing the class
+# definition is used. Otherwise one should specify the include paths that
+# are normally passed to the compiler using the -I flag.
+
+STRIP_FROM_INC_PATH    =
+
+# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter
+# (but less readable) file names. This can be useful is your file systems
+# doesn't support long names like on DOS, Mac, or CD-ROM.
+
+SHORT_NAMES            = NO
+
+# If the JAVADOC_AUTOBRIEF tag is set to YES then Doxygen
+# will interpret the first line (until the first dot) of a JavaDoc-style
+# comment as the brief description. If set to NO, the JavaDoc
+# comments will behave just like regular Qt-style comments
+# (thus requiring an explicit @brief command for a brief description.)
+
+JAVADOC_AUTOBRIEF      = YES
+
+# If the QT_AUTOBRIEF tag is set to YES then Doxygen will
+# interpret the first line (until the first dot) of a Qt-style
+# comment as the brief description. If set to NO, the comments
+# will behave just like regular Qt-style comments (thus requiring
+# an explicit \brief command for a brief description.)
+
+QT_AUTOBRIEF           = NO
+
+# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make Doxygen
+# treat a multi-line C++ special comment block (i.e. a block of //! or ///
+# comments) as a brief description. This used to be the default behaviour.
+# The new default is to treat a multi-line C++ comment block as a detailed
+# description. Set this tag to YES if you prefer the old behaviour instead.
+
+MULTILINE_CPP_IS_BRIEF = NO
+
+# If the INHERIT_DOCS tag is set to YES (the default) then an undocumented
+# member inherits the documentation from any documented member that it
+# re-implements.
+
+INHERIT_DOCS           = YES
+
+# If the SEPARATE_MEMBER_PAGES tag is set to YES, then doxygen will produce
+# a new page for each member. If set to NO, the documentation of a member will
+# be part of the file/class/namespace that contains it.
+
+SEPARATE_MEMBER_PAGES  = NO
+
+# The TAB_SIZE tag can be used to set the number of spaces in a tab.
+# Doxygen uses this value to replace tabs by spaces in code fragments.
+
+TAB_SIZE               = 8
+
+# This tag can be used to specify a number of aliases that acts
+# as commands in the documentation. An alias has the form "name=value".
+# For example adding "sideeffect=\par Side Effects:\n" will allow you to
+# put the command \sideeffect (or @sideeffect) in the documentation, which
+# will result in a user-defined paragraph with heading "Side Effects:".
+# You can put \n's in the value part of an alias to insert newlines.
+
+ALIASES                =
+
+# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C
+# sources only. Doxygen will then generate output that is more tailored for C.
+# For instance, some of the names that are used will be different. The list
+# of all members will be omitted, etc.
+
+OPTIMIZE_OUTPUT_FOR_C  = NO
+
+# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java
+# sources only. Doxygen will then generate output that is more tailored for
+# Java. For instance, namespaces will be presented as packages, qualified
+# scopes will look different, etc.
+
+OPTIMIZE_OUTPUT_JAVA   = NO
+
+# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran
+# sources only. Doxygen will then generate output that is more tailored for
+# Fortran.
+
+OPTIMIZE_FOR_FORTRAN   = NO
+
+# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL
+# sources. Doxygen will then generate output that is tailored for
+# VHDL.
+
+OPTIMIZE_OUTPUT_VHDL   = NO
+
+# Doxygen selects the parser to use depending on the extension of the files it parses.
+# With this tag you can assign which parser to use for a given extension.
+# Doxygen has a built-in mapping, but you can override or extend it using this tag.
+# The format is ext=language, where ext is a file extension, and language is one of
+# the parsers supported by doxygen: IDL, Java, Javascript, C#, C, C++, D, PHP,
+# Objective-C, Python, Fortran, VHDL, C, C++. For instance to make doxygen treat
+# .inc files as Fortran files (default is PHP), and .f files as C (default is Fortran),
+# use: inc=Fortran f=C. Note that for custom extensions you also need to set FILE_PATTERNS otherwise the files are not read by doxygen.
+
+EXTENSION_MAPPING      =
+
+# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want
+# to include (a tag file for) the STL sources as input, then you should
+# set this tag to YES in order to let doxygen match functions declarations and
+# definitions whose arguments contain STL classes (e.g. func(std::string); v.s.
+# func(std::string) {}). This also make the inheritance and collaboration
+# diagrams that involve STL classes more complete and accurate.
+
+BUILTIN_STL_SUPPORT    = NO
+
+# If you use Microsoft's C++/CLI language, you should set this option to YES to
+# enable parsing support.
+
+CPP_CLI_SUPPORT        = NO
+
+# Set the SIP_SUPPORT tag to YES if your project consists of sip sources only.
+# Doxygen will parse them like normal C++ but will assume all classes use public
+# instead of private inheritance when no explicit protection keyword is present.
+
+SIP_SUPPORT            = NO
+
+# For Microsoft's IDL there are propget and propput attributes to indicate getter
+# and setter methods for a property. Setting this option to YES (the default)
+# will make doxygen to replace the get and set methods by a property in the
+# documentation. This will only work if the methods are indeed getting or
+# setting a simple type. If this is not the case, or you want to show the
+# methods anyway, you should set this option to NO.
+
+IDL_PROPERTY_SUPPORT   = YES
+
+# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC
+# tag is set to YES, then doxygen will reuse the documentation of the first
+# member in the group (if any) for the other members of the group. By default
+# all members of a group must be documented explicitly.
+
+DISTRIBUTE_GROUP_DOC   = NO
+
+# Set the SUBGROUPING tag to YES (the default) to allow class member groups of
+# the same type (for instance a group of public functions) to be put as a
+# subgroup of that type (e.g. under the Public Functions section). Set it to
+# NO to prevent subgrouping. Alternatively, this can be done per class using
+# the \nosubgrouping command.
+
+SUBGROUPING            = YES
+
+# When TYPEDEF_HIDES_STRUCT is enabled, a typedef of a struct, union, or enum
+# is documented as struct, union, or enum with the name of the typedef. So
+# typedef struct TypeS {} TypeT, will appear in the documentation as a struct
+# with name TypeT. When disabled the typedef will appear as a member of a file,
+# namespace, or class. And the struct will be named TypeS. This can typically
+# be useful for C code in case the coding convention dictates that all compound
+# types are typedef'ed and only the typedef is referenced, never the tag name.
+
+TYPEDEF_HIDES_STRUCT   = NO
+
+# The SYMBOL_CACHE_SIZE determines the size of the internal cache use to
+# determine which symbols to keep in memory and which to flush to disk.
+# When the cache is full, less often used symbols will be written to disk.
+# For small to medium size projects (<1000 input files) the default value is
+# probably good enough. For larger projects a too small cache size can cause
+# doxygen to be busy swapping symbols to and from disk most of the time
+# causing a significant performance penality.
+# If the system has enough physical memory increasing the cache will improve the
+# performance by keeping more symbols in memory. Note that the value works on
+# a logarithmic scale so increasing the size by one will rougly double the
+# memory usage. The cache size is given by this formula:
+# 2^(16+SYMBOL_CACHE_SIZE). The valid range is 0..9, the default is 0,
+# corresponding to a cache size of 2^16 = 65536 symbols
+
+SYMBOL_CACHE_SIZE      = 0
+
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+
+# If the EXTRACT_ALL tag is set to YES doxygen will assume all entities in
+# documentation are documented, even if no documentation was available.
+# Private class members and static file members will be hidden unless
+# the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES
+
+EXTRACT_ALL            = NO
+
+# If the EXTRACT_PRIVATE tag is set to YES all private members of a class
+# will be included in the documentation.
+
+EXTRACT_PRIVATE        = YES
+
+# If the EXTRACT_STATIC tag is set to YES all static members of a file
+# will be included in the documentation.
+
+EXTRACT_STATIC         = NO
+
+# If the EXTRACT_LOCAL_CLASSES tag is set to YES classes (and structs)
+# defined locally in source files will be included in the documentation.
+# If set to NO only classes defined in header files are included.
+
+EXTRACT_LOCAL_CLASSES  = YES
+
+# This flag is only useful for Objective-C code. When set to YES local
+# methods, which are defined in the implementation section but not in
+# the interface are included in the documentation.
+# If set to NO (the default) only methods in the interface are included.
+
+EXTRACT_LOCAL_METHODS  = NO
+
+# If this flag is set to YES, the members of anonymous namespaces will be
+# extracted and appear in the documentation as a namespace called
+# 'anonymous_namespace{file}', where file will be replaced with the base
+# name of the file that contains the anonymous namespace. By default
+# anonymous namespace are hidden.
+
+EXTRACT_ANON_NSPACES   = NO
+
+# If the HIDE_UNDOC_MEMBERS tag is set to YES, Doxygen will hide all
+# undocumented members of documented classes, files or namespaces.
+# If set to NO (the default) these members will be included in the
+# various overviews, but no documentation section is generated.
+# This option has no effect if EXTRACT_ALL is enabled.
+
+HIDE_UNDOC_MEMBERS     = YES
+
+# If the HIDE_UNDOC_CLASSES tag is set to YES, Doxygen will hide all
+# undocumented classes that are normally visible in the class hierarchy.
+# If set to NO (the default) these classes will be included in the various
+# overviews. This option has no effect if EXTRACT_ALL is enabled.
+
+HIDE_UNDOC_CLASSES     = YES
+
+# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, Doxygen will hide all
+# friend (class|struct|union) declarations.
+# If set to NO (the default) these declarations will be included in the
+# documentation.
+
+HIDE_FRIEND_COMPOUNDS  = NO
+
+# If the HIDE_IN_BODY_DOCS tag is set to YES, Doxygen will hide any
+# documentation blocks found inside the body of a function.
+# If set to NO (the default) these blocks will be appended to the
+# function's detailed documentation block.
+
+HIDE_IN_BODY_DOCS      = NO
+
+# The INTERNAL_DOCS tag determines if documentation
+# that is typed after a \internal command is included. If the tag is set
+# to NO (the default) then the documentation will be excluded.
+# Set it to YES to include the internal documentation.
+
+INTERNAL_DOCS          = NO
+
+# If the CASE_SENSE_NAMES tag is set to NO then Doxygen will only generate
+# file names in lower-case letters. If set to YES upper-case letters are also
+# allowed. This is useful if you have classes or files whose names only differ
+# in case and if your file system supports case sensitive file names. Windows
+# and Mac users are advised to set this option to NO.
+
+CASE_SENSE_NAMES       = YES
+
+# If the HIDE_SCOPE_NAMES tag is set to NO (the default) then Doxygen
+# will show members with their full class and namespace scopes in the
+# documentation. If set to YES the scope will be hidden.
+
+HIDE_SCOPE_NAMES       = NO
+
+# If the SHOW_INCLUDE_FILES tag is set to YES (the default) then Doxygen
+# will put a list of the files that are included by a file in the documentation
+# of that file.
+
+SHOW_INCLUDE_FILES     = YES
+
+# If the INLINE_INFO tag is set to YES (the default) then a tag [inline]
+# is inserted in the documentation for inline members.
+
+INLINE_INFO            = YES
+
+# If the SORT_MEMBER_DOCS tag is set to YES (the default) then doxygen
+# will sort the (detailed) documentation of file and class members
+# alphabetically by member name. If set to NO the members will appear in
+# declaration order.
+
+SORT_MEMBER_DOCS       = YES
+
+# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the
+# brief documentation of file, namespace and class members alphabetically
+# by member name. If set to NO (the default) the members will appear in
+# declaration order.
+
+SORT_BRIEF_DOCS        = NO
+
+# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the (brief and detailed) documentation of class members so that constructors and destructors are listed first. If set to NO (the default) the constructors will appear in the respective orders defined by SORT_MEMBER_DOCS and SORT_BRIEF_DOCS. This tag will be ignored for brief docs if SORT_BRIEF_DOCS is set to NO and ignored for detailed docs if SORT_MEMBER_DOCS is set to NO.
+
+SORT_MEMBERS_CTORS_1ST = YES
+
+# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the
+# hierarchy of group names into alphabetical order. If set to NO (the default)
+# the group names will appear in their defined order.
+
+SORT_GROUP_NAMES       = NO
+
+# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be
+# sorted by fully-qualified names, including namespaces. If set to
+# NO (the default), the class list will be sorted only by class name,
+# not including the namespace part.
+# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
+# Note: This option applies only to the class list, not to the
+# alphabetical list.
+
+SORT_BY_SCOPE_NAME     = YES
+
+# The GENERATE_TODOLIST tag can be used to enable (YES) or
+# disable (NO) the todo list. This list is created by putting \todo
+# commands in the documentation.
+
+GENERATE_TODOLIST      = YES
+
+# The GENERATE_TESTLIST tag can be used to enable (YES) or
+# disable (NO) the test list. This list is created by putting \test
+# commands in the documentation.
+
+GENERATE_TESTLIST      = YES
+
+# The GENERATE_BUGLIST tag can be used to enable (YES) or
+# disable (NO) the bug list. This list is created by putting \bug
+# commands in the documentation.
+
+GENERATE_BUGLIST       = YES
+
+# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or
+# disable (NO) the deprecated list. This list is created by putting
+# \deprecated commands in the documentation.
+
+GENERATE_DEPRECATEDLIST= YES
+
+# The ENABLED_SECTIONS tag can be used to enable conditional
+# documentation sections, marked by \if sectionname ... \endif.
+
+ENABLED_SECTIONS       =
+
+# The MAX_INITIALIZER_LINES tag determines the maximum number of lines
+# the initial value of a variable or define consists of for it to appear in
+# the documentation. If the initializer consists of more lines than specified
+# here it will be hidden. Use a value of 0 to hide initializers completely.
+# The appearance of the initializer of individual variables and defines in the
+# documentation can be controlled using \showinitializer or \hideinitializer
+# command in the documentation regardless of this setting.
+
+MAX_INITIALIZER_LINES  = 30
+
+# Set the SHOW_USED_FILES tag to NO to disable the list of files generated
+# at the bottom of the documentation of classes and structs. If set to YES the
+# list will mention the files that were used to generate the documentation.
+
+SHOW_USED_FILES        = YES
+
+# If the sources in your project are distributed over multiple directories
+# then setting the SHOW_DIRECTORIES tag to YES will show the directory hierarchy
+# in the documentation. The default is NO.
+
+SHOW_DIRECTORIES       = NO
+
+# Set the SHOW_FILES tag to NO to disable the generation of the Files page.
+# This will remove the Files entry from the Quick Index and from the
+# Folder Tree View (if specified). The default is YES.
+
+SHOW_FILES             = YES
+
+# Set the SHOW_NAMESPACES tag to NO to disable the generation of the
+# Namespaces page.
+# This will remove the Namespaces entry from the Quick Index
+# and from the Folder Tree View (if specified). The default is YES.
+
+SHOW_NAMESPACES        = YES
+
+# The FILE_VERSION_FILTER tag can be used to specify a program or script that
+# doxygen should invoke to get the current version for each file (typically from
+# the version control system). Doxygen will invoke the program by executing (via
+# popen()) the command <command> <input-file>, where <command> is the value of
+# the FILE_VERSION_FILTER tag, and <input-file> is the name of an input file
+# provided by doxygen. Whatever the program writes to standard output
+# is used as the file version. See the manual for examples.
+
+FILE_VERSION_FILTER    =
+
+# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed by
+# doxygen. The layout file controls the global structure of the generated output files
+# in an output format independent way. The create the layout file that represents
+# doxygen's defaults, run doxygen with the -l option. You can optionally specify a
+# file name after the option, if omitted DoxygenLayout.xml will be used as the name
+# of the layout file.
+
+LAYOUT_FILE            =
+
+#---------------------------------------------------------------------------
+# configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+
+# The QUIET tag can be used to turn on/off the messages that are generated
+# by doxygen. Possible values are YES and NO. If left blank NO is used.
+
+QUIET                  = NO
+
+# The WARNINGS tag can be used to turn on/off the warning messages that are
+# generated by doxygen. Possible values are YES and NO. If left blank
+# NO is used.
+
+WARNINGS               = YES
+
+# If WARN_IF_UNDOCUMENTED is set to YES, then doxygen will generate warnings
+# for undocumented members. If EXTRACT_ALL is set to YES then this flag will
+# automatically be disabled.
+
+WARN_IF_UNDOCUMENTED   = YES
+
+# If WARN_IF_DOC_ERROR is set to YES, doxygen will generate warnings for
+# potential errors in the documentation, such as not documenting some
+# parameters in a documented function, or documenting parameters that
+# don't exist or using markup commands wrongly.
+
+WARN_IF_DOC_ERROR      = YES
+
+# This WARN_NO_PARAMDOC option can be abled to get warnings for
+# functions that are documented, but have no documentation for their parameters
+# or return value. If set to NO (the default) doxygen will only warn about
+# wrong or incomplete parameter documentation, but not about the absence of
+# documentation.
+
+WARN_NO_PARAMDOC       = NO
+
+# The WARN_FORMAT tag determines the format of the warning messages that
+# doxygen can produce. The string should contain the $file, $line, and $text
+# tags, which will be replaced by the file and line number from which the
+# warning originated and the warning text. Optionally the format may contain
+# $version, which will be replaced by the version of the file (if it could
+# be obtained via FILE_VERSION_FILTER)
+
+WARN_FORMAT            = "$file:$line: $text"
+
+# The WARN_LOGFILE tag can be used to specify a file to which warning
+# and error messages should be written. If left blank the output is written
+# to stderr.
+
+WARN_LOGFILE           =
+
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+
+# The INPUT tag can be used to specify the files and/or directories that contain
+# documented source files. You may enter file names like "myfile.cpp" or
+# directories like "/usr/src/myproject". Separate the files or directories
+# with spaces.
+
+INPUT                  = lm lm/builder lm/filter lm/interpolate lm/wrappers util util/double-conversion util/stream
+
+# This tag can be used to specify the character encoding of the source files
+# that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is
+# also the default input encoding. Doxygen uses libiconv (or the iconv built
+# into libc) for the transcoding. See http://www.gnu.org/software/libiconv for
+# the list of possible encodings.
+
+INPUT_ENCODING         = UTF-8
+
+# If the value of the INPUT tag contains directories, you can use the
+# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp
+# and *.h) to filter out the source-files in the directories. If left
+# blank the following patterns are tested:
+# *.c *.cc *.cxx *.cpp *.c++ *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh *.hxx
+# *.hpp *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm *.py *.f90
+
+FILE_PATTERNS          =
+
+# The RECURSIVE tag can be used to turn specify whether or not subdirectories
+# should be searched for input files as well. Possible values are YES and NO.
+# If left blank NO is used.
+
+RECURSIVE              = NO
+
+# The EXCLUDE tag can be used to specify files and/or directories that should
+# excluded from the INPUT source files. This way you can easily exclude a
+# subdirectory from a directory tree whose root is specified with the INPUT tag.
+
+EXCLUDE                =
+
+# The EXCLUDE_SYMLINKS tag can be used select whether or not files or
+# directories that are symbolic links (a Unix filesystem feature) are excluded
+# from the input.
+
+EXCLUDE_SYMLINKS       = NO
+
+# If the value of the INPUT tag contains directories, you can use the
+# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude
+# certain files from those directories. Note that the wildcards are matched
+# against the file with absolute path, so to exclude all test directories
+# for example use the pattern */test/*
+
+EXCLUDE_PATTERNS       =
+
+# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
+# (namespaces, classes, functions, etc.) that should be excluded from the
+# output. The symbol name can be a fully qualified name, a word, or if the
+# wildcard * is used, a substring. Examples: ANamespace, AClass,
+# AClass::ANamespace, ANamespace::*Test
+
+EXCLUDE_SYMBOLS        =
+
+# The EXAMPLE_PATH tag can be used to specify one or more files or
+# directories that contain example code fragments that are included (see
+# the \include command).
+
+EXAMPLE_PATH           =
+
+# If the value of the EXAMPLE_PATH tag contains directories, you can use the
+# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp
+# and *.h) to filter out the source-files in the directories. If left
+# blank all files are included.
+
+EXAMPLE_PATTERNS       =
+
+# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be
+# searched for input files to be used with the \include or \dontinclude
+# commands irrespective of the value of the RECURSIVE tag.
+# Possible values are YES and NO. If left blank NO is used.
+
+EXAMPLE_RECURSIVE      = NO
+
+# The IMAGE_PATH tag can be used to specify one or more files or
+# directories that contain image that are included in the documentation (see
+# the \image command).
+
+IMAGE_PATH             =
+
+# The INPUT_FILTER tag can be used to specify a program that doxygen should
+# invoke to filter for each input file. Doxygen will invoke the filter program
+# by executing (via popen()) the command <filter> <input-file>, where <filter>
+# is the value of the INPUT_FILTER tag, and <input-file> is the name of an
+# input file. Doxygen will then use the output that the filter program writes
+# to standard output.
+# If FILTER_PATTERNS is specified, this tag will be
+# ignored.
+
+INPUT_FILTER           =
+
+# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern
+# basis.
+# Doxygen will compare the file name with each pattern and apply the
+# filter if there is a match.
+# The filters are a list of the form:
+# pattern=filter (like *.cpp=my_cpp_filter). See INPUT_FILTER for further
+# info on how filters are used. If FILTER_PATTERNS is empty, INPUT_FILTER
+# is applied to all files.
+
+FILTER_PATTERNS        =
+
+# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using
+# INPUT_FILTER) will be used to filter the input files when producing source
+# files to browse (i.e. when SOURCE_BROWSER is set to YES).
+
+FILTER_SOURCE_FILES    = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to source browsing
+#---------------------------------------------------------------------------
+
+# If the SOURCE_BROWSER tag is set to YES then a list of source files will
+# be generated. Documented entities will be cross-referenced with these sources.
+# Note: To get rid of all source code in the generated output, make sure also
+# VERBATIM_HEADERS is set to NO.
+
+SOURCE_BROWSER         = NO
+
+# Setting the INLINE_SOURCES tag to YES will include the body
+# of functions and classes directly in the documentation.
+
+INLINE_SOURCES         = NO
+
+# Setting the STRIP_CODE_COMMENTS tag to YES (the default) will instruct
+# doxygen to hide any special comment blocks from generated source code
+# fragments. Normal C and C++ comments will always remain visible.
+
+STRIP_CODE_COMMENTS    = YES
+
+# If the REFERENCED_BY_RELATION tag is set to YES
+# then for each documented function all documented
+# functions referencing it will be listed.
+
+REFERENCED_BY_RELATION = NO
+
+# If the REFERENCES_RELATION tag is set to YES
+# then for each documented function all documented entities
+# called/used by that function will be listed.
+
+REFERENCES_RELATION    = NO
+
+# If the REFERENCES_LINK_SOURCE tag is set to YES (the default)
+# and SOURCE_BROWSER tag is set to YES, then the hyperlinks from
+# functions in REFERENCES_RELATION and REFERENCED_BY_RELATION lists will
+# link to the source code.
+# Otherwise they will link to the documentation.
+
+REFERENCES_LINK_SOURCE = YES
+
+# If the USE_HTAGS tag is set to YES then the references to source code
+# will point to the HTML generated by the htags(1) tool instead of doxygen
+# built-in source browser. The htags tool is part of GNU's global source
+# tagging system (see http://www.gnu.org/software/global/global.html). You
+# will need version 4.8.6 or higher.
+
+USE_HTAGS              = NO
+
+# If the VERBATIM_HEADERS tag is set to YES (the default) then Doxygen
+# will generate a verbatim copy of the header file for each class for
+# which an include is specified. Set to NO to disable this.
+
+VERBATIM_HEADERS       = YES
+
+#---------------------------------------------------------------------------
+# configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+
+# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index
+# of all compounds will be generated. Enable this if the project
+# contains a lot of classes, structs, unions or interfaces.
+
+ALPHABETICAL_INDEX     = NO
+
+# If the alphabetical index is enabled (see ALPHABETICAL_INDEX) then
+# the COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns
+# in which this list will be split (can be a number in the range [1..20])
+
+COLS_IN_ALPHA_INDEX    = 5
+
+# In case all classes in a project start with a common prefix, all
+# classes will be put under the same header in the alphabetical index.
+# The IGNORE_PREFIX tag can be used to specify one or more prefixes that
+# should be ignored while generating the index headers.
+
+IGNORE_PREFIX          =
+
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_HTML tag is set to YES (the default) Doxygen will
+# generate HTML output.
+
+GENERATE_HTML          = YES
+
+# The HTML_OUTPUT tag is used to specify where the HTML docs will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be
+# put in front of it. If left blank `html' will be used as the default path.
+
+HTML_OUTPUT            = html
+
+# The HTML_FILE_EXTENSION tag can be used to specify the file extension for
+# each generated HTML page (for example: .htm,.php,.asp). If it is left blank
+# doxygen will generate files with .html extension.
+
+HTML_FILE_EXTENSION    = .html
+
+# The HTML_HEADER tag can be used to specify a personal HTML header for
+# each generated HTML page. If it is left blank doxygen will generate a
+# standard header.
+
+HTML_HEADER            =
+
+# The HTML_FOOTER tag can be used to specify a personal HTML footer for
+# each generated HTML page. If it is left blank doxygen will generate a
+# standard footer.
+
+HTML_FOOTER            =
+
+# If the HTML_TIMESTAMP tag is set to YES then the generated HTML
+# documentation will contain the timesstamp.
+
+HTML_TIMESTAMP         = NO
+
+# The HTML_STYLESHEET tag can be used to specify a user-defined cascading
+# style sheet that is used by each HTML page. It can be used to
+# fine-tune the look of the HTML output. If the tag is left blank doxygen
+# will generate a default style sheet. Note that doxygen will try to copy
+# the style sheet file to the HTML output directory, so don't put your own
+# stylesheet in the HTML output directory as well, or it will be erased!
+
+HTML_STYLESHEET        =
+
+# If the HTML_ALIGN_MEMBERS tag is set to YES, the members of classes,
+# files or namespaces will be aligned in HTML using tables. If set to
+# NO a bullet list will be used.
+
+HTML_ALIGN_MEMBERS     = YES
+
+# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
+# documentation will contain sections that can be hidden and shown after the
+# page has loaded. For this to work a browser that supports
+# JavaScript and DHTML is required (for instance Mozilla 1.0+, Firefox
+# Netscape 6.0+, Internet explorer 5.0+, Konqueror, or Safari).
+
+HTML_DYNAMIC_SECTIONS  = NO
+
+# If the GENERATE_DOCSET tag is set to YES, additional index files
+# will be generated that can be used as input for Apple's Xcode 3
+# integrated development environment, introduced with OSX 10.5 (Leopard).
+# To create a documentation set, doxygen will generate a Makefile in the
+# HTML output directory. Running make will produce the docset in that
+# directory and running "make install" will install the docset in
+# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find
+# it at startup.
+# See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html for more information.
+
+GENERATE_DOCSET        = NO
+
+# When GENERATE_DOCSET tag is set to YES, this tag determines the name of the
+# feed. A documentation feed provides an umbrella under which multiple
+# documentation sets from a single provider (such as a company or product suite)
+# can be grouped.
+
+DOCSET_FEEDNAME        = "Doxygen generated docs"
+
+# When GENERATE_DOCSET tag is set to YES, this tag specifies a string that
+# should uniquely identify the documentation set bundle. This should be a
+# reverse domain-name style string, e.g. com.mycompany.MyDocSet. Doxygen
+# will append .docset to the name.
+
+DOCSET_BUNDLE_ID       = org.doxygen.Project
+
+# If the GENERATE_HTMLHELP tag is set to YES, additional index files
+# will be generated that can be used as input for tools like the
+# Microsoft HTML help workshop to generate a compiled HTML help file (.chm)
+# of the generated HTML documentation.
+
+GENERATE_HTMLHELP      = NO
+
+# If the GENERATE_HTMLHELP tag is set to YES, the CHM_FILE tag can
+# be used to specify the file name of the resulting .chm file. You
+# can add a path in front of the file if the result should not be
+# written to the html output directory.
+
+CHM_FILE               =
+
+# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can
+# be used to specify the location (absolute path including file name) of
+# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run
+# the HTML help compiler on the generated index.hhp.
+
+HHC_LOCATION           =
+
+# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag
+# controls if a separate .chi index file is generated (YES) or that
+# it should be included in the master .chm file (NO).
+
+GENERATE_CHI           = NO
+
+# If the GENERATE_HTMLHELP tag is set to YES, the CHM_INDEX_ENCODING
+# is used to encode HtmlHelp index (hhk), content (hhc) and project file
+# content.
+
+CHM_INDEX_ENCODING     =
+
+# If the GENERATE_HTMLHELP tag is set to YES, the BINARY_TOC flag
+# controls whether a binary table of contents is generated (YES) or a
+# normal table of contents (NO) in the .chm file.
+
+BINARY_TOC             = NO
+
+# The TOC_EXPAND flag can be set to YES to add extra items for group members
+# to the contents of the HTML help documentation and to the tree view.
+
+TOC_EXPAND             = NO
+
+# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and QHP_VIRTUAL_FOLDER
+# are set, an additional index file will be generated that can be used as input for
+# Qt's qhelpgenerator to generate a Qt Compressed Help (.qch) of the generated
+# HTML documentation.
+
+GENERATE_QHP           = NO
+
+# If the QHG_LOCATION tag is specified, the QCH_FILE tag can
+# be used to specify the file name of the resulting .qch file.
+# The path specified is relative to the HTML output folder.
+
+QCH_FILE               =
+
+# The QHP_NAMESPACE tag specifies the namespace to use when generating
+# Qt Help Project output. For more information please see
+# http://doc.trolltech.com/qthelpproject.html#namespace
+
+QHP_NAMESPACE          =
+
+# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating
+# Qt Help Project output. For more information please see
+# http://doc.trolltech.com/qthelpproject.html#virtual-folders
+
+QHP_VIRTUAL_FOLDER     = doc
+
+# If QHP_CUST_FILTER_NAME is set, it specifies the name of a custom filter to add.
+# For more information please see
+# http://doc.trolltech.com/qthelpproject.html#custom-filters
+
+QHP_CUST_FILTER_NAME   =
+
+# The QHP_CUST_FILT_ATTRS tag specifies the list of the attributes of the custom filter to add.For more information please see
+# <a href="http://doc.trolltech.com/qthelpproject.html#custom-filters">Qt Help Project / Custom Filters</a>.
+
+QHP_CUST_FILTER_ATTRS  =
+
+# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this project's
+# filter section matches.
+# <a href="http://doc.trolltech.com/qthelpproject.html#filter-attributes">Qt Help Project / Filter Attributes</a>.
+
+QHP_SECT_FILTER_ATTRS  =
+
+# If the GENERATE_QHP tag is set to YES, the QHG_LOCATION tag can
+# be used to specify the location of Qt's qhelpgenerator.
+# If non-empty doxygen will try to run qhelpgenerator on the generated
+# .qhp file.
+
+QHG_LOCATION           =
+
+# The DISABLE_INDEX tag can be used to turn on/off the condensed index at
+# top of each HTML page. The value NO (the default) enables the index and
+# the value YES disables it.
+
+DISABLE_INDEX          = NO
+
+# This tag can be used to set the number of enum values (range [1..20])
+# that doxygen will group on one line in the generated HTML documentation.
+
+ENUM_VALUES_PER_LINE   = 4
+
+# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index
+# structure should be generated to display hierarchical information.
+# If the tag value is set to YES, a side panel will be generated
+# containing a tree-like index structure (just like the one that
+# is generated for HTML Help). For this to work a browser that supports
+# JavaScript, DHTML, CSS and frames is required (i.e. any modern browser).
+# Windows users are probably better off using the HTML help feature.
+
+GENERATE_TREEVIEW      = NO
+
+# By enabling USE_INLINE_TREES, doxygen will generate the Groups, Directories,
+# and Class Hierarchy pages using a tree view instead of an ordered list.
+
+USE_INLINE_TREES       = NO
+
+# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be
+# used to set the initial width (in pixels) of the frame in which the tree
+# is shown.
+
+TREEVIEW_WIDTH         = 250
+
+# Use this tag to change the font size of Latex formulas included
+# as images in the HTML documentation. The default is 10. Note that
+# when you change the font size after a successful doxygen run you need
+# to manually remove any form_*.png images from the HTML output directory
+# to force them to be regenerated.
+
+FORMULA_FONTSIZE       = 10
+
+# When the SEARCHENGINE tag is enable doxygen will generate a search box for the HTML output. The underlying search engine uses javascript
+# and DHTML and should work on any modern browser. Note that when using HTML help (GENERATE_HTMLHELP) or Qt help (GENERATE_QHP)
+# there is already a search function so this one should typically
+# be disabled.
+
+SEARCHENGINE           = YES
+
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will
+# generate Latex output.
+
+GENERATE_LATEX         = YES
+
+# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be
+# put in front of it. If left blank `latex' will be used as the default path.
+
+LATEX_OUTPUT           = latex
+
+# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be
+# invoked. If left blank `latex' will be used as the default command name.
+
+LATEX_CMD_NAME         = latex
+
+# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to
+# generate index for LaTeX. If left blank `makeindex' will be used as the
+# default command name.
+
+MAKEINDEX_CMD_NAME     = makeindex
+
+# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact
+# LaTeX documents. This may be useful for small projects and may help to
+# save some trees in general.
+
+COMPACT_LATEX          = NO
+
+# The PAPER_TYPE tag can be used to set the paper type that is used
+# by the printer. Possible values are: a4, a4wide, letter, legal and
+# executive. If left blank a4wide will be used.
+
+PAPER_TYPE             = a4wide
+
+# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX
+# packages that should be included in the LaTeX output.
+
+EXTRA_PACKAGES         =
+
+# The LATEX_HEADER tag can be used to specify a personal LaTeX header for
+# the generated latex document. The header should contain everything until
+# the first chapter. If it is left blank doxygen will generate a
+# standard header. Notice: only use this tag if you know what you are doing!
+
+LATEX_HEADER           =
+
+# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated
+# is prepared for conversion to pdf (using ps2pdf). The pdf file will
+# contain links (just like the HTML output) instead of page references
+# This makes the output suitable for online browsing using a pdf viewer.
+
+PDF_HYPERLINKS         = YES
+
+# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of
+# plain latex in the generated Makefile. Set this option to YES to get a
+# higher quality PDF documentation.
+
+USE_PDFLATEX           = YES
+
+# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode.
+# command to the generated LaTeX files. This will instruct LaTeX to keep
+# running if errors occur, instead of asking the user for help.
+# This option is also used when generating formulas in HTML.
+
+LATEX_BATCHMODE        = NO
+
+# If LATEX_HIDE_INDICES is set to YES then doxygen will not
+# include the index chapters (such as File Index, Compound Index, etc.)
+# in the output.
+
+LATEX_HIDE_INDICES     = NO
+
+# If LATEX_SOURCE_CODE is set to YES then doxygen will include source code with syntax highlighting in the LaTeX output. Note that which sources are shown also depends on other settings such as SOURCE_BROWSER.
+
+LATEX_SOURCE_CODE      = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the RTF output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_RTF tag is set to YES Doxygen will generate RTF output
+# The RTF output is optimized for Word 97 and may not look very pretty with
+# other RTF readers or editors.
+
+GENERATE_RTF           = NO
+
+# The RTF_OUTPUT tag is used to specify where the RTF docs will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be
+# put in front of it. If left blank `rtf' will be used as the default path.
+
+RTF_OUTPUT             = rtf
+
+# If the COMPACT_RTF tag is set to YES Doxygen generates more compact
+# RTF documents. This may be useful for small projects and may help to
+# save some trees in general.
+
+COMPACT_RTF            = NO
+
+# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated
+# will contain hyperlink fields. The RTF file will
+# contain links (just like the HTML output) instead of page references.
+# This makes the output suitable for online browsing using WORD or other
+# programs which support those fields.
+# Note: wordpad (write) and others do not support links.
+
+RTF_HYPERLINKS         = NO
+
+# Load stylesheet definitions from file. Syntax is similar to doxygen's
+# config file, i.e. a series of assignments. You only have to provide
+# replacements, missing definitions are set to their default value.
+
+RTF_STYLESHEET_FILE    =
+
+# Set optional variables used in the generation of an rtf document.
+# Syntax is similar to doxygen's config file.
+
+RTF_EXTENSIONS_FILE    =
+
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_MAN tag is set to YES (the default) Doxygen will
+# generate man pages
+
+GENERATE_MAN           = NO
+
+# The MAN_OUTPUT tag is used to specify where the man pages will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be
+# put in front of it. If left blank `man' will be used as the default path.
+
+MAN_OUTPUT             = man
+
+# The MAN_EXTENSION tag determines the extension that is added to
+# the generated man pages (default is the subroutine's section .3)
+
+MAN_EXTENSION          = .3
+
+# If the MAN_LINKS tag is set to YES and Doxygen generates man output,
+# then it will generate one additional man file for each entity
+# documented in the real man page(s). These additional files
+# only source the real man page, but without them the man command
+# would be unable to find the correct page. The default is NO.
+
+MAN_LINKS              = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the XML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_XML tag is set to YES Doxygen will
+# generate an XML file that captures the structure of
+# the code including all documentation.
+
+GENERATE_XML           = NO
+
+# The XML_OUTPUT tag is used to specify where the XML pages will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be
+# put in front of it. If left blank `xml' will be used as the default path.
+
+XML_OUTPUT             = xml
+
+# The XML_SCHEMA tag can be used to specify an XML schema,
+# which can be used by a validating XML parser to check the
+# syntax of the XML files.
+
+XML_SCHEMA             =
+
+# The XML_DTD tag can be used to specify an XML DTD,
+# which can be used by a validating XML parser to check the
+# syntax of the XML files.
+
+XML_DTD                =
+
+# If the XML_PROGRAMLISTING tag is set to YES Doxygen will
+# dump the program listings (including syntax highlighting
+# and cross-referencing information) to the XML output. Note that
+# enabling this will significantly increase the size of the XML output.
+
+XML_PROGRAMLISTING     = YES
+
+#---------------------------------------------------------------------------
+# configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_AUTOGEN_DEF tag is set to YES Doxygen will
+# generate an AutoGen Definitions (see autogen.sf.net) file
+# that captures the structure of the code including all
+# documentation. Note that this feature is still experimental
+# and incomplete at the moment.
+
+GENERATE_AUTOGEN_DEF   = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_PERLMOD tag is set to YES Doxygen will
+# generate a Perl module file that captures the structure of
+# the code including all documentation. Note that this
+# feature is still experimental and incomplete at the
+# moment.
+
+GENERATE_PERLMOD       = NO
+
+# If the PERLMOD_LATEX tag is set to YES Doxygen will generate
+# the necessary Makefile rules, Perl scripts and LaTeX code to be able
+# to generate PDF and DVI output from the Perl module output.
+
+PERLMOD_LATEX          = NO
+
+# If the PERLMOD_PRETTY tag is set to YES the Perl module output will be
+# nicely formatted so it can be parsed by a human reader.
+# This is useful
+# if you want to understand what is going on.
+# On the other hand, if this
+# tag is set to NO the size of the Perl module output will be much smaller
+# and Perl will parse it just the same.
+
+PERLMOD_PRETTY         = YES
+
+# The names of the make variables in the generated doxyrules.make file
+# are prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX.
+# This is useful so different doxyrules.make files included by the same
+# Makefile don't overwrite each other's variables.
+
+PERLMOD_MAKEVAR_PREFIX =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor
+#---------------------------------------------------------------------------
+
+# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will
+# evaluate all C-preprocessor directives found in the sources and include
+# files.
+
+ENABLE_PREPROCESSING   = YES
+
+# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro
+# names in the source code. If set to NO (the default) only conditional
+# compilation will be performed. Macro expansion can be done in a controlled
+# way by setting EXPAND_ONLY_PREDEF to YES.
+
+MACRO_EXPANSION        = NO
+
+# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES
+# then the macro expansion is limited to the macros specified with the
+# PREDEFINED and EXPAND_AS_DEFINED tags.
+
+EXPAND_ONLY_PREDEF     = NO
+
+# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files
+# in the INCLUDE_PATH (see below) will be search if a #include is found.
+
+SEARCH_INCLUDES        = YES
+
+# The INCLUDE_PATH tag can be used to specify one or more directories that
+# contain include files that are not input files but should be processed by
+# the preprocessor.
+
+INCLUDE_PATH           =
+
+# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard
+# patterns (like *.h and *.hpp) to filter out the header-files in the
+# directories. If left blank, the patterns specified with FILE_PATTERNS will
+# be used.
+
+INCLUDE_FILE_PATTERNS  =
+
+# The PREDEFINED tag can be used to specify one or more macro names that
+# are defined before the preprocessor is started (similar to the -D option of
+# gcc). The argument of the tag is a list of macros of the form: name
+# or name=definition (no spaces). If the definition and the = are
+# omitted =1 is assumed. To prevent a macro definition from being
+# undefined via #undef or recursively expanded use the := operator
+# instead of the = operator.
+
+PREDEFINED             =
+
+# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then
+# this tag can be used to specify a list of macro names that should be expanded.
+# The macro definition that is found in the sources will be used.
+# Use the PREDEFINED tag if you want to use a different macro definition.
+
+EXPAND_AS_DEFINED      =
+
+# If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then
+# doxygen's preprocessor will remove all function-like macros that are alone
+# on a line, have an all uppercase name, and do not end with a semicolon. Such
+# function macros are typically used for boiler-plate code, and will confuse
+# the parser if not removed.
+
+SKIP_FUNCTION_MACROS   = YES
+
+#---------------------------------------------------------------------------
+# Configuration::additions related to external references
+#---------------------------------------------------------------------------
+
+# The TAGFILES option can be used to specify one or more tagfiles.
+# Optionally an initial location of the external documentation
+# can be added for each tagfile. The format of a tag file without
+# this location is as follows:
+#
+# TAGFILES = file1 file2 ...
+# Adding location for the tag files is done as follows:
+#
+# TAGFILES = file1=loc1 "file2 = loc2" ...
+# where "loc1" and "loc2" can be relative or absolute paths or
+# URLs. If a location is present for each tag, the installdox tool
+# does not have to be run to correct the links.
+# Note that each tag file must have a unique name
+# (where the name does NOT include the path)
+# If a tag file is not located in the directory in which doxygen
+# is run, you must also specify the path to the tagfile here.
+
+TAGFILES               =
+
+# When a file name is specified after GENERATE_TAGFILE, doxygen will create
+# a tag file that is based on the input files it reads.
+
+GENERATE_TAGFILE       =
+
+# If the ALLEXTERNALS tag is set to YES all external classes will be listed
+# in the class index. If set to NO only the inherited external classes
+# will be listed.
+
+ALLEXTERNALS           = NO
+
+# If the EXTERNAL_GROUPS tag is set to YES all external groups will be listed
+# in the modules index. If set to NO, only the current project's groups will
+# be listed.
+
+EXTERNAL_GROUPS        = YES
+
+# The PERL_PATH should be the absolute path and name of the perl script
+# interpreter (i.e. the result of `which perl').
+
+PERL_PATH              = /usr/bin/perl
+
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool
+#---------------------------------------------------------------------------
+
+# If the CLASS_DIAGRAMS tag is set to YES (the default) Doxygen will
+# generate a inheritance diagram (in HTML, RTF and LaTeX) for classes with base
+# or super classes. Setting the tag to NO turns the diagrams off. Note that
+# this option is superseded by the HAVE_DOT option below. This is only a
+# fallback. It is recommended to install and use dot, since it yields more
+# powerful graphs.
+
+CLASS_DIAGRAMS         = YES
+
+# You can define message sequence charts within doxygen comments using the \msc
+# command. Doxygen will then run the mscgen tool (see
+# http://www.mcternan.me.uk/mscgen/) to produce the chart and insert it in the
+# documentation. The MSCGEN_PATH tag allows you to specify the directory where
+# the mscgen tool resides. If left empty the tool is assumed to be found in the
+# default search path.
+
+MSCGEN_PATH            =
+
+# If set to YES, the inheritance and collaboration graphs will hide
+# inheritance and usage relations if the target is undocumented
+# or is not a class.
+
+HIDE_UNDOC_RELATIONS   = YES
+
+# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is
+# available from the path. This tool is part of Graphviz, a graph visualization
+# toolkit from AT&T and Lucent Bell Labs. The other options in this section
+# have no effect if this option is set to NO (the default)
+
+HAVE_DOT               = NO
+
+# By default doxygen will write a font called FreeSans.ttf to the output
+# directory and reference it in all dot files that doxygen generates. This
+# font does not include all possible unicode characters however, so when you need
+# these (or just want a differently looking font) you can specify the font name
+# using DOT_FONTNAME. You need need to make sure dot is able to find the font,
+# which can be done by putting it in a standard location or by setting the
+# DOTFONTPATH environment variable or by setting DOT_FONTPATH to the directory
+# containing the font.
+
+DOT_FONTNAME           = FreeSans
+
+# The DOT_FONTSIZE tag can be used to set the size of the font of dot graphs.
+# The default size is 10pt.
+
+DOT_FONTSIZE           = 10
+
+# By default doxygen will tell dot to use the output directory to look for the
+# FreeSans.ttf font (which doxygen will put there itself). If you specify a
+# different font using DOT_FONTNAME you can set the path where dot
+# can find it using this tag.
+
+DOT_FONTPATH           =
+
+# If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen
+# will generate a graph for each documented class showing the direct and
+# indirect inheritance relations. Setting this tag to YES will force the
+# the CLASS_DIAGRAMS tag to NO.
+
+CLASS_GRAPH            = YES
+
+# If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen
+# will generate a graph for each documented class showing the direct and
+# indirect implementation dependencies (inheritance, containment, and
+# class references variables) of the class with other documented classes.
+
+COLLABORATION_GRAPH    = YES
+
+# If the GROUP_GRAPHS and HAVE_DOT tags are set to YES then doxygen
+# will generate a graph for groups, showing the direct groups dependencies
+
+GROUP_GRAPHS           = YES
+
+# If the UML_LOOK tag is set to YES doxygen will generate inheritance and
+# collaboration diagrams in a style similar to the OMG's Unified Modeling
+# Language.
+
+UML_LOOK               = NO
+
+# If set to YES, the inheritance and collaboration graphs will show the
+# relations between templates and their instances.
+
+TEMPLATE_RELATIONS     = NO
+
+# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDE_GRAPH, and HAVE_DOT
+# tags are set to YES then doxygen will generate a graph for each documented
+# file showing the direct and indirect include dependencies of the file with
+# other documented files.
+
+INCLUDE_GRAPH          = YES
+
+# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and
+# HAVE_DOT tags are set to YES then doxygen will generate a graph for each
+# documented header file showing the documented files that directly or
+# indirectly include this file.
+
+INCLUDED_BY_GRAPH      = YES
+
+# If the CALL_GRAPH and HAVE_DOT options are set to YES then
+# doxygen will generate a call dependency graph for every global function
+# or class method. Note that enabling this option will significantly increase
+# the time of a run. So in most cases it will be better to enable call graphs
+# for selected functions only using the \callgraph command.
+
+CALL_GRAPH             = NO
+
+# If the CALLER_GRAPH and HAVE_DOT tags are set to YES then
+# doxygen will generate a caller dependency graph for every global function
+# or class method. Note that enabling this option will significantly increase
+# the time of a run. So in most cases it will be better to enable caller
+# graphs for selected functions only using the \callergraph command.
+
+CALLER_GRAPH           = NO
+
+# If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen
+# will graphical hierarchy of all classes instead of a textual one.
+
+GRAPHICAL_HIERARCHY    = YES
+
+# If the DIRECTORY_GRAPH, SHOW_DIRECTORIES and HAVE_DOT tags are set to YES
+# then doxygen will show the dependencies a directory has on other directories
+# in a graphical way. The dependency relations are determined by the #include
+# relations between the files in the directories.
+
+DIRECTORY_GRAPH        = YES
+
+# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images
+# generated by dot. Possible values are png, jpg, or gif
+# If left blank png will be used.
+
+DOT_IMAGE_FORMAT       = png
+
+# The tag DOT_PATH can be used to specify the path where the dot tool can be
+# found. If left blank, it is assumed the dot tool can be found in the path.
+
+DOT_PATH               =
+
+# The DOTFILE_DIRS tag can be used to specify one or more directories that
+# contain dot files that are included in the documentation (see the
+# \dotfile command).
+
+DOTFILE_DIRS           =
+
+# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of
+# nodes that will be shown in the graph. If the number of nodes in a graph
+# becomes larger than this value, doxygen will truncate the graph, which is
+# visualized by representing a node as a red box. Note that doxygen if the
+# number of direct children of the root node in a graph is already larger than
+# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note
+# that the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH.
+
+DOT_GRAPH_MAX_NODES    = 50
+
+# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the
+# graphs generated by dot. A depth value of 3 means that only nodes reachable
+# from the root by following a path via at most 3 edges will be shown. Nodes
+# that lay further from the root node will be omitted. Note that setting this
+# option to 1 or 2 may greatly reduce the computation time needed for large
+# code bases. Also note that the size of a graph can be further restricted by
+# DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction.
+
+MAX_DOT_GRAPH_DEPTH    = 0
+
+# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent
+# background. This is disabled by default, because dot on Windows does not
+# seem to support this out of the box. Warning: Depending on the platform used,
+# enabling this option may lead to badly anti-aliased labels on the edges of
+# a graph (i.e. they become hard to read).
+
+DOT_TRANSPARENT        = NO
+
+# Set the DOT_MULTI_TARGETS tag to YES allow dot to generate multiple output
+# files in one run (i.e. multiple -o and -T options on the command line). This
+# makes dot run faster, but since only newer versions of dot (>1.8.10)
+# support this, this feature is disabled by default.
+
+DOT_MULTI_TARGETS      = NO
+
+# If the GENERATE_LEGEND tag is set to YES (the default) Doxygen will
+# generate a legend page explaining the meaning of the various boxes and
+# arrows in the dot generated graphs.
+
+GENERATE_LEGEND        = YES
+
+# If the DOT_CLEANUP tag is set to YES (the default) Doxygen will
+# remove the intermediate dot files that are used to generate
+# the various graphs.
+
+DOT_CLEANUP            = YES

cpp/thirdpart/kenlm/LICENSE

+Most of the code here is licensed under the LGPL.  There are exceptions that
+have their own licenses, listed below.  See comments in those files for more
+details.  
+
+util/getopt.* is getopt for Windows
+util/murmur_hash.cc
+util/string_piece.hh and util/string_piece.cc
+util/double-conversion/LICENSE covers util/double-conversion except the build files
+util/file.cc contains a modified implementation of mkstemp under the LGPL
+util/integer_to_string.* is BSD
+
+For the rest:
+
+    KenLM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published
+    by the Free Software Foundation, either version 2.1 of the License, or
+    (at your option) any later version.
+
+    KenLM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License 2.1
+    along with KenLM code.  If not, see <http://www.gnu.org/licenses/lgpl-2.1.html>.

cpp/thirdpart/kenlm/MANIFEST.in

+# file GENERATED by distutils, do NOT edit
+include setup.py
+include lm/*.cc
+include lm/*.hh
+include python/*.cpp
+include util/*.cc
+include util/*.hh
+include util/double-conversion/*.cc
+include util/double-conversion/*.h

cpp/thirdpart/kenlm/README.md

+# kenlm
+
+Language model inference code by Kenneth Heafield (kenlm at kheafield.com)
+
+The website https://kheafield.com/code/kenlm/ has more documentation.  If you're a decoder developer, please download the latest version from there instead of copying from another decoder.
+
+## Compiling
+Use cmake, see [BUILDING](BUILDING) for build dependencies and more detail.
+```bash
+mkdir -p build
+cd build
+cmake ..
+make -j 4
+```
+
+## Compiling with your own build system
+If you want to compile with your own build system (Makefile etc) or to use as a library, there are a number of macros you can set on the g++ command line or in util/have.hh .  
+
+* `KENLM_MAX_ORDER` is the maximum order that can be loaded.  This is done to make state an efficient POD rather than a vector.  
+* `HAVE_ICU` If your code links against ICU, define this to disable the internal StringPiece and replace it with ICU's copy of StringPiece, avoiding naming conflicts.  
+
+ARPA files can be read in compressed format with these options:
+* `HAVE_ZLIB` Supports gzip.  Link with -lz.
+* `HAVE_BZLIB` Supports bzip2.  Link with -lbz2.
+* `HAVE_XZLIB` Supports xz.  Link with -llzma.
+
+Note that these macros impact only `read_compressed.cc` and `read_compressed_test.cc`.  The bjam build system will auto-detect bzip2 and xz support.  
+
+## Estimation
+lmplz estimates unpruned language models with modified Kneser-Ney smoothing.  After compiling with bjam, run
+```bash
+bin/lmplz -o 5 <text >text.arpa
+```
+The algorithm is on-disk, using an amount of memory that you specify.  See https://kheafield.com/code/kenlm/estimation/ for more.
+
+MT Marathon 2012 team members Ivan Pouzyrevsky and Mohammed Mediani contributed to the computation design and early implementation. Jon Clark contributed to the design, clarified points about smoothing, and added logging. 
+
+## Filtering
+
+filter takes an ARPA or count file and removes entries that will never be queried.  The filter criterion can be corpus-level vocabulary, sentence-level vocabulary, or sentence-level phrases.  Run
+```bash
+bin/filter
+```
+and see https://kheafield.com/code/kenlm/filter/ for more documentation.
+
+## Querying
+
+Two data structures are supported: probing and trie.  Probing is a probing hash table with keys that are 64-bit hashes of n-grams and floats as values.  Trie is a fairly standard trie but with bit-level packing so it uses the minimum number of bits to store word indices and pointers.  The trie node entries are sorted by word index.  Probing is the fastest and uses the most memory.  Trie uses the least memory and is a bit slower.
+
+As is the custom in language modeling, all probabilities are log base 10.
+
+With trie, resident memory is 58% of IRST's smallest version and 21% of SRI's compact version.  Simultaneously, trie CPU's use is 81% of IRST's fastest version and 84% of SRI's fast version.  KenLM's probing hash table implementation goes even faster at the expense of using more memory.  See https://kheafield.com/code/kenlm/benchmark/.
+
+Binary format via mmap is supported.  Run `./build_binary` to make one then pass the binary file name to the appropriate Model constructor.   
+
+## Platforms
+`murmur_hash.cc` and `bit_packing.hh` perform unaligned reads and writes that make the code architecture-dependent.  
+It has been sucessfully tested on x86\_64, x86, and PPC64.  
+ARM support is reportedly working, at least on the iphone.   
+
+Runs on Linux, OS X, Cygwin, and MinGW.  
+
+Hideo Okuma and Tomoyuki Yoshimura from NICT contributed ports to ARM and MinGW.  
+
+## Decoder developers
+- I recommend copying the code and distributing it with your decoder.  However, please send improvements upstream.  
+
+- It's possible to compile the query-only code without Boost, but useful things like estimating models require Boost.
+
+- Select the macros you want, listed in the previous section.  
+
+- There are two build systems: compile.sh and cmake.  They're pretty simple and are intended to be reimplemented in your build system.  
+
+- Use either the interface in `lm/model.hh` or `lm/virtual_interface.hh`.  Interface documentation is in comments of `lm/virtual_interface.hh` and `lm/model.hh`.  
+
+- There are several possible data structures in `model.hh`.  Use `RecognizeBinary` in `binary_format.hh` to determine which one a user has provided.  You probably already implement feature functions as an abstract virtual base class with several children.  I suggest you co-opt this existing virtual dispatch by templatizing the language model feature implementation on the KenLM model identified by `RecognizeBinary`.  This is the strategy used in Moses and cdec.
+
+- See `lm/config.hh` for run-time tuning options.
+
+## Contributors
+Contributions to KenLM are welcome.  Please base your contributions on https://github.com/kpu/kenlm and send pull requests (or I might give you commit access).  Downstream copies in Moses and cdec are maintained by overwriting them so do not make changes there.  
+
+## Python module
+Contributed by Victor Chahuneau.
+
+### Installation
+
+```bash
+pip install https://github.com/kpu/kenlm/archive/master.zip
+```
+
+### Basic Usage
+```python
+import kenlm
+model = kenlm.Model('lm/test.arpa')
+print(model.score('this is a sentence .', bos = True, eos = True))
+```
+See [python/example.py](python/example.py) and [python/kenlm.pyx](python/kenlm.pyx) for more, including stateful APIs.  
+
+---
+
+The name was Hieu Hoang's idea, not mine.

cpp/thirdpart/kenlm/clean_query_only.sh

+#!/bin/bash
+rm -rf {lm,util,util/double-conversion}/*.o bin/{query,build_binary}