1 files changed, 95 insertions, 0 deletions
diff --git a/kaldi_io/src/kaldi/util/const-integer-set.h b/kaldi_io/src/kaldi/util/const-integer-set.h
new file mode 100644
index 0000000..ffdce4d
--- /dev/null
+++ b/kaldi_io/src/kaldi/util/const-integer-set.h
@@ -0,0 +1,95 @@
+// util/const-integer-set.h
+
+// Copyright 2009-2011     Microsoft Corporation
+
+// See ../../COPYING for clarification regarding multiple authors
+//
+// 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
+//
+// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+// MERCHANTABLITY OR NON-INFRINGEMENT.
+// See the Apache 2 License for the specific language governing permissions and
+// limitations under the License.
+
+
+#ifndef KALDI_UTIL_CONST_INTEGER_SET_H_
+#define KALDI_UTIL_CONST_INTEGER_SET_H_
+#include <vector>
+#include <set>
+#include <algorithm>
+#include <limits>
+#include <cassert>
+#include "util/stl-utils.h"
+
+  /* ConstIntegerSet is a way to efficiently test whether something is in a
+     supplied set of integers.  It can be initialized from a vector or set, but
+     never changed after that. It either uses a sorted vector or an array of
+     bool, depending on the input.  It behaves like a const version of an STL set, with
+     only a subset of the functionality, except all the member functions are
+     upper-case.
+
+     Note that we could get rid of the member slow_set_, but we'd have to
+     do more work to implement an iterator type.  This would save memory.
+  */
+
+namespace kaldi {
+
+template<class I> class ConstIntegerSet {
+ public:
+  ConstIntegerSet(): lowest_member_(1), highest_member_(0) { }
+
+  void Init(const std::vector<I> &input) {
+    slow_set_ = input;
+    SortAndUniq(&slow_set_);
+    InitInternal();
+  }
+
+  void Init(const std::set<I> &input) {
+    CopySetToVector(input, &slow_set_);
+    InitInternal();
+  }
+
+  explicit ConstIntegerSet(const std::vector<I> &input): slow_set_(input) {
+    SortAndUniq(&slow_set_);
+    InitInternal();
+  }
+  explicit ConstIntegerSet(const std::set<I> &input) {
+    CopySetToVector(input, &slow_set_);
+    InitInternal();
+  }
+  explicit ConstIntegerSet(const ConstIntegerSet<I> &other): slow_set_(other.slow_set_) {
+    InitInternal();
+  }
+
+  int count(I i) const;  // returns 1 or 0.
+
+  typedef typename std::vector<I>::const_iterator iterator;
+  iterator begin() const { return slow_set_.begin(); }
+  iterator end() const { return slow_set_.end(); }
+  size_t size() const { return slow_set_.size(); }
+  bool empty() const { return slow_set_.empty(); }
+
+  void Write(std::ostream &os, bool binary) const;
+  void Read(std::istream &is, bool binary);
+
+ private:
+  I lowest_member_;
+  I highest_member_;
+  bool contiguous_;
+  bool quick_;
+  std::vector<bool> quick_set_;
+  std::vector<I> slow_set_;
+  void InitInternal();
+};
+
+} // end namespace kaldi
+
+#include "const-integer-set-inl.h"
+
+#endif