Dogcows Code - chaz/yoink/blob - src/moof/hash.hh

   1
   2 /*]  Copyright (c) 2009-2011, Charles McGarvey  [*****************************
   3 **]  All rights reserved.
   4 *
   5 * Distributable under the terms and conditions of the 2-clause BSD license;
   6 * see the file COPYING for a complete text of the license.
   7 *
   8 *****************************************************************************/
   9
  10 #ifndef _MOOF_HASH_HH_
  11 #define _MOOF_HASH_HH_
  12
  13 #include <string>
  14
  15 #include <stlplus/containers/hash.hpp>
  16
  17
  18 /**
  19  * \file hash.hh
  20  * Hash tables and functions.
  21  */
  22
  23 namespace moof {
  24
  25
  26 using stlplus::hash;
  27
  28 struct hash_function
  29 {
  30         // generic hash function
  31         unsigned operator () (const void* key, int len, unsigned seed = -1) const;
  32
  33         unsigned operator () (const std::string& val) const
  34         {
  35                 return (*this)(val.data(), val.length());
  36         }
  37
  38         template <class T>
  39         unsigned operator () (T val) const
  40         {
  41                 return static_cast<unsigned>(val);
  42         }
  43 };
  44
  45
  46 } // namespace moof
  47
  48 #endif // _MOOF_HASH_HH_
  49