/usr/include/sunpinyin-2.0/slm/thread/ValueCompress.h is in libsunpinyin-dev 2.0.3-5ubuntu1.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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* Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
*
* The contents of this file are subject to the terms of either the GNU Lesser
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* NOTICE PURSUANT TO SECTION 9 OF THE COMMON DEVELOPMENT AND DISTRIBUTION LICENSE
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#ifndef AGC_SUN_VALUE_COMPRESS_H
#define AGC_SUN_VALUE_COMPRESS_H
#include <map>
#include <vector>
class CValueCompressor {
public:
/**
* N > 4
*/
void
operator()(std::map<float, int>& values,
std::map<float, int>& map,
std::vector<float>& table,
unsigned N) const;
/**
* used for using log as effective distance, vice versa.
* if using -log(a) as distance to compress value a, ie: a --> -log2(a),
* the val_rmap should be val_rmap[-log(a)] = a;
* values map using the effective distance value. But After this call
* map using the real value, ie "a" in previous example. But table
* would be the weight-center for a group effective value, You should
* make it back to original values after this call.
*/
void
operator()(std::map<float, float>& val_rmap,
std::map<float, int>& values,
std::map<float, int>& map,
std::vector<float>& table,
unsigned N) const;
};
#endif
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