ceph/src/boost/libs/geometry/test/geometry_to_crc.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2021 Barend Gehrels, Amsterdam, the Netherlands.
   4
   5 // Use, modification and distribution is subject to the Boost Software License,
   6 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 #ifndef GEOMETRY_TEST_GEOMETRY_TO_CRC_HPP
  10 #define GEOMETRY_TEST_GEOMETRY_TO_CRC_HPP
  11
  12 #include <boost/geometry/io/wkt/wkt.hpp>
  13
  14 #include <boost/crc.hpp>
  15
  16 #include <iomanip>
  17 #include <string>
  18
  19 // Convenience function for tests, it generates a 4 character CRC of a geometry
  20 // which can be used in filenames and/or testcases such as 'nores_37f6'
  21 template <typename Geometry>
  22 inline std::string geometry_to_crc(Geometry const& geometry)
  23 {
  24   std::ostringstream out1;
  25   out1 << bg::wkt(geometry);
  26
  27   const std::string str = out1.str();
  28
  29   boost::crc_ccitt_type result;
  30   result.process_bytes(str.data(), str.length());
  31
  32   std::ostringstream out2;
  33   out2 << std::setw(4) << std::setfill('0') << std::hex << result.checksum();
  34   return out2.str();
  35 }
  36
  37 #endif // GEOMETRY_TEST_GEOMETRY_TO_CRC_HPP