Line data    Source code

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