Zoltan2 Version of the Day
Zoltan2_IdentifierTraits.cpp
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00005 //   Zoltan2: A package of combinatorial algorithms for scientific computing
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00045 
00050 #include <Zoltan2_Standards.hpp>
00051 #include <Zoltan2_AlltoAll.hpp>
00052 #include <Zoltan2_IdentifierTraits.hpp>
00053 
00054 #include <Teuchos_SerializationTraits.hpp>
00055 #include <Teuchos_HashUtils.hpp>
00056 #include <Teuchos_ReductionOp.hpp>
00057 
00058 #include <utility>
00059 #include <iostream>
00060 #include <sstream>
00061 #include <string>
00062 #include <limits>
00063 #include <cstdlib>
00064 
00065 
00066 namespace Zoltan2
00067 {
00068 
00073 int getHashCode(const unsigned char *a, size_t len)
00074 {
00075   int total=0;
00076   unsigned char *to = reinterpret_cast<unsigned char *>(&total);
00077   int c=0;
00078   for (size_t i=0; i < len; i++){
00079     to[c++] += a[i];
00080     if (c == sizeof(int))
00081       c = 0;
00082   }
00083   if (total < 0)
00084     total *= -1;
00085   return total;
00086 }
00087 
00088 } // namespace Z2
00089