ceph/src/boost/libs/core/test/bit_endian_test.cpp

   1 // Test for boost/core/bit.hpp (bit_ceil)
   2 //
   3 // Copyright 2020 Peter Dimov
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // https://www.boost.org/LICENSE_1_0.txt
   6
   7 #include <boost/core/bit.hpp>
   8 #include <boost/core/lightweight_test.hpp>
   9 #include <boost/cstdint.hpp>
  10 #include <cstring>
  11
  12 #if defined(_MSC_VER)
  13 # pragma warning(disable: 4127) // conditional expression is constant
  14 #endif
  15
  16 int main()
  17 {
  18     boost::uint64_t v = ( static_cast<boost::uint64_t>( 0x01020304u ) << 32 ) + 0x05060708u;
  19
  20     if( boost::core::endian::native == boost::core::endian::little )
  21     {
  22         unsigned char w[] = { 8, 7, 6, 5, 4, 3, 2, 1 };
  23         BOOST_TEST( std::memcmp( &v, w, 8 ) == 0 );
  24     }
  25     else if( boost::core::endian::native == boost::core::endian::big )
  26     {
  27         unsigned char w[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
  28         BOOST_TEST( std::memcmp( &v, w, 8 ) == 0 );
  29     }
  30     else
  31     {
  32         unsigned char w1[] = { 8, 7, 6, 5, 4, 3, 2, 1 };
  33         BOOST_TEST( std::memcmp( &v, w1, 8 ) != 0 );
  34
  35         unsigned char w2[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
  36         BOOST_TEST( std::memcmp( &v, w2, 8 ) != 0 );
  37     }
  38
  39     return boost::report_errors();
  40 }