Line data    Source code

       1             : // Copyright (c) 2021  Made to Order Software Corp.  All Rights Reserved
       2             : //
       3             : // https://snapwebsites.org/
       4             : // contact@m2osw.com
       5             : //
       6             : // This program is free software; you can redistribute it and/or modify
       7             : // it under the terms of the GNU General Public License as published by
       8             : // the Free Software Foundation; either version 2 of the License, or
       9             : // (at your option) any later version.
      10             : //
      11             : // This program is distributed in the hope that it will be useful,
      12             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             : // GNU General Public License for more details.
      15             : //
      16             : // You should have received a copy of the GNU General Public License along
      17             : // with this program; if not, write to the Free Software Foundation, Inc.,
      18             : // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      19             : 
      20             : /** \file
      21             :  * \brief Verify the various __int128 output support.
      22             :  *
      23             :  * This file implements tests to verify that the support to print out
      24             :  * large numbers works as expected.
      25             :  */
      26             : 
      27             : // self
      28             : //
      29             : #include    "catch_main.h"
      30             : 
      31             : 
      32             : 
      33             : // snapdev lib
      34             : //
      35             : #include    <snapdev/ostream_int128.h>
      36             : 
      37             : 
      38             : // last include
      39             : //
      40             : #include    <snapdev/poison.h>
      41             : 
      42             : 
      43             : #pragma GCC diagnostic ignored "-Wpedantic"
      44             : 
      45             : 
      46           7 : CATCH_TEST_CASE("ostream_int128", "[ostream][int128]")
      47             : {
      48          10 :     CATCH_START_SECTION("ostream_int128: small numbers (-10 to +10)")
      49             :     {
      50          22 :         for(int i(-10); i <= 10; ++i)
      51             :         {
      52          21 :             __int128 l(i);
      53          42 :             std::stringstream ss;
      54          21 :             ss << l;
      55          21 :             CATCH_REQUIRE(ss.str() == std::to_string(i));
      56             :         }
      57             :     }
      58             :     CATCH_END_SECTION()
      59             : 
      60          10 :     CATCH_START_SECTION("ostream_int128: positive numbers")
      61             :     {
      62        1001 :         for(int i(0); i < 1000; ++i)
      63             :         {
      64        1000 :             std::int32_t v((rand() & 0x7FFFFFFF));
      65        1000 :             __int128 l(v);
      66        2000 :             std::stringstream ss;
      67        1000 :             ss << l;
      68        1000 :             CATCH_REQUIRE(ss.str() == std::to_string(v));
      69             :         }
      70             :     }
      71             :     CATCH_END_SECTION()
      72             : 
      73          10 :     CATCH_START_SECTION("ostream_int128: negative numbers")
      74             :     {
      75        1001 :         for(int i(0); i < 1000; ++i)
      76             :         {
      77        1000 :             std::int32_t v(-(rand() & 0x7FFFFFFF));
      78        1000 :             __int128 l(v);
      79        2000 :             std::stringstream ss;
      80        1000 :             ss << l;
      81        1000 :             CATCH_REQUIRE(ss.str() == std::to_string(v));
      82             :         }
      83             :     }
      84             :     CATCH_END_SECTION()
      85             : 
      86          10 :     CATCH_START_SECTION("ostream_int128: most positive number")
      87             :     {
      88           1 :         unsigned __int128 l(0);
      89           1 :         l = ~l;
      90           2 :         std::stringstream ss;
      91           1 :         ss << l;
      92           1 :         CATCH_REQUIRE(ss.str() == "340282366920938463463374607431768211455");
      93             :     }
      94             :     CATCH_END_SECTION()
      95             : 
      96          10 :     CATCH_START_SECTION("ostream_int128: most negative number")
      97             :     {
      98           1 :         __int128 l(1);
      99           1 :         l <<= 127;
     100           2 :         std::stringstream ss;
     101           1 :         ss << l;
     102           1 :         CATCH_REQUIRE(ss.str() == "-170141183460469231731687303715884105728");
     103             :     }
     104             :     CATCH_END_SECTION()
     105          11 : }
     106             : 
     107             : 
     108             : // vim: ts=4 sw=4 et