ceph/src/boost/libs/compute/include/boost/compute/detail/sha1.hpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 // See http://boostorg.github.com/compute for more information.
   9 //---------------------------------------------------------------------------//
  10
  11 #ifndef BOOST_COMPUTE_DETAIL_SHA1_HPP
  12 #define BOOST_COMPUTE_DETAIL_SHA1_HPP
  13
  14 #include <sstream>
  15 #include <iomanip>
  16 #include <boost/uuid/sha1.hpp>
  17
  18 namespace boost {
  19 namespace compute {
  20 namespace detail {
  21
  22 // Accumulates SHA1 hash of the passed strings.
  23 class sha1 {
  24     public:
  25         sha1(const std::string &s = "") {
  26             if (!s.empty()) this->process(s);
  27         }
  28
  29         sha1& process(const std::string &s) {
  30             h.process_bytes(s.c_str(), s.size());
  31             return *this;
  32         }
  33
  34         operator std::string() {
  35             unsigned int digest[5];
  36             h.get_digest(digest);
  37
  38             std::ostringstream buf;
  39             for(int i = 0; i < 5; ++i)
  40                 buf << std::hex << std::setfill('0') << std::setw(8) << digest[i];
  41
  42             return buf.str();
  43         }
  44     private:
  45         boost::uuids::detail::sha1 h;
  46 };
  47
  48 } // end detail namespace
  49 } // end compute namespace
  50 } // end boost namespace
  51
  52
  53 #endif // BOOST_COMPUTE_DETAIL_SHA1_HPP