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cs440-acg/ext/openexr/PyIlmBase/PyImath/PyImathStringTable.h

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+///////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2009-2012, Industrial Light & Magic, a division of Lucas
+// Digital Ltd. LLC
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// *       Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// *       Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// *       Neither the name of Industrial Light & Magic nor the names of
+// its contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission. 
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////
+
+#ifndef _PyImathStringTable_h_
+#define _PyImathStringTable_h_
+
+#include <string>
+#include <stdint.h>
+#include <boost/multi_index_container.hpp>
+#include <boost/multi_index/ordered_index.hpp>
+#include <boost/multi_index/identity.hpp>
+#include <boost/multi_index/member.hpp>
+
+namespace PyImath {
+
+// define a separate index type so as not to have
+// any confusion between ints and indices
+struct StringTableIndex
+{
+  public:
+    typedef uint32_t index_type;
+
+    // the default constructor was a private member before to prevent
+    // the empty instantiation. But, it became public now to resolve 
+    // a linking error on windows platform. PyImathStringArray is
+    // exposed with PYIMATH_EXPORT, This causes to expose all the members
+    // of PyImathFixedArray<StringTableIndex> also.
+    
+    StringTableIndex() : _index(0) {}
+    StringTableIndex (const StringTableIndex &si) : _index (si._index) {}
+    explicit StringTableIndex (index_type i) : _index (i) {}
+
+    const StringTableIndex & operator = (const StringTableIndex &si)
+    { 
+        _index = si._index; return *this;
+    }
+
+    bool operator == (const StringTableIndex &si) const
+    { 
+        return _index == si._index;
+    }
+
+    bool operator != (const StringTableIndex &si) const
+    {
+        return _index != si._index;
+    }
+
+    // operator less for sorting
+    bool operator < (const StringTableIndex &si) const
+    {
+        return _index < si._index;
+    }
+
+    index_type index() const { return _index; }
+
+  private:
+    index_type _index;
+};
+
+} // namespace PyImath
+
+// Add a type trait for string indices to allow use in an AlignedArray
+namespace boost {
+    template <> struct is_pod< ::PyImath::StringTableIndex>
+    {
+        BOOST_STATIC_CONSTANT(bool,value=true); 
+    };
+} // namespace boost
+
+namespace PyImath {
+
+//
+// A string table entry containing a unique index and string
+template<class T>
+struct StringTableEntry
+{
+    StringTableEntry(StringTableIndex ii,const T &ss) : i(ii), s(ss) {}
+    StringTableIndex i;
+    T                s;
+};
+
+namespace {
+
+using boost::multi_index_container;
+using namespace boost::multi_index;
+
+//
+// A map data structure for string strings.
+// It exposes two index types : StringTableIndex and string
+//
+template<class T>
+class StringTableDetailT {
+    public:
+    typedef boost::multi_index_container<
+        StringTableEntry<T>,
+        indexed_by<
+            ordered_unique<member<StringTableEntry<T>,StringTableIndex,&StringTableEntry<T>::i> >,
+            ordered_unique<member<StringTableEntry<T>,T,&StringTableEntry<T>::s> >
+        > 
+    > StringTableContainer;
+};
+
+} // namespace
+
+typedef StringTableDetailT<std::string> StringTableDetail;
+typedef StringTableDetailT<std::wstring> WStringTableDetail;
+
+//
+// Storage class for storing unique string elements.
+//
+//
+template<class T>
+class StringTableT
+{
+  public:
+
+    // look up a string table entry either by value or index
+    StringTableIndex    lookup(const T &s) const;
+    const T &           lookup(StringTableIndex index) const;
+
+    // return the index to a string table entry, adding if not found
+    StringTableIndex    intern(const T &i);
+
+    size_t              size() const;
+    bool                hasString(const T &s) const;
+    bool                hasStringIndex(const StringTableIndex &s) const;
+    
+  private:
+
+    typedef typename StringTableDetailT<T>::StringTableContainer Table;
+    Table _table;
+};
+
+typedef StringTableT<std::string> StringTable;
+typedef StringTableT<std::wstring> WStringTable;
+
+} // namespace PyImath
+
+#endif