gdb/unittests/basic_string_view/operations/compare/char/1.cc

   1 // { dg-options "-std=gnu++17" }
   2
   3 // Copyright (C) 2013-2021 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library 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 library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // basic_string_view::compare
  21 // int compare(const basic_string_view& str) const;
  22 // int compare(size_type pos1, size_type n1, const basic_string_view& str) const;
  23 // int compare(size_type pos1, size_type n1, const basic_string_view& str,
  24 //             size_type pos2, size_type n2) const;
  25 // int compare(const charT* s) const;
  26 // int compare(size_type pos1, size_type n1,
  27 //             const charT* s, size_type n2 = npos) const;
  28
  29 // NB compare should be thought of as a lexographical compare, ie how
  30 // things would be sorted in a dictionary.
  31
  32 namespace operations_compare_1 {
  33
  34 enum want_value {lt=0, z=1, gt=2};
  35
  36 int
  37 test_value(int result, want_value expected);
  38
  39 int
  40 test_value(int result, want_value expected)
  41 {
  42   bool pass = false;
  43
  44   switch (expected) {
  45   case lt:
  46     if (result < 0)
  47       pass = true;
  48     break;
  49   case z:
  50     if (!result)
  51       pass = true;
  52     break;
  53   case gt:
  54     if (result > 0)
  55       pass = true;
  56     break;
  57   default:
  58     pass = false; //should not get here
  59   }
  60   VERIFY(pass);
  61   return 0;
  62 }
  63
  64 static int
  65 test01 ()
  66 {
  67   using gdb::string_view;
  68
  69   string_view   str_0("costa rica");
  70   string_view   str_1("costa marbella");
  71   string_view   str_2;
  72
  73   //sanity check
  74   test_value(strcmp("costa marbella", "costa rica"), lt);
  75   test_value(strcmp("costa rica", "costa rica"), z);
  76   test_value(strcmp(str_1.data(), str_0.data()), lt);
  77   test_value(strcmp(str_0.data(), str_1.data()), gt);
  78   test_value(strncmp(str_1.data(), str_0.data(), 6), z);
  79   test_value(strncmp(str_1.data(), str_0.data(), 14), lt);
  80   test_value(memcmp(str_1.data(), str_0.data(), 6), z);
  81   test_value(memcmp(str_1.data(), str_0.data(), 10), lt);
  82   test_value(memcmp("costa marbella", "costa rica", 10), lt);
  83
  84   // int compare(const basic_string_view& str) const;
  85   test_value(str_0.compare(str_1), gt); //because r>m
  86   test_value(str_1.compare(str_0), lt); //because m<r
  87   str_2 = str_0;
  88   test_value(str_2.compare(str_0), z);
  89   str_2 = "cost";
  90   test_value(str_2.compare(str_0), lt);
  91   str_2 = "costa ricans";
  92   test_value(str_2.compare(str_0), gt);
  93
  94   // int compare(size_type pos1, size_type n1, const basic_string_view& str) const;
  95   test_value(str_1.compare(0, 6, str_0), lt);
  96   str_2 = "cost";
  97   test_value(str_1.compare(0, 4, str_2), z);
  98   test_value(str_1.compare(0, 5, str_2), gt);
  99
 100   // int compare(size_type pos1, size_type n1, const basic_string_view& str,
 101   //             size_type pos2, size_type n2) const;
 102   test_value(str_1.compare(0, 6, str_0, 0, 6), z);
 103   test_value(str_1.compare(0, 7, str_0, 0, 7), lt);
 104   test_value(str_0.compare(0, 7, str_1, 0, 7), gt);
 105
 106   // int compare(const charT* s) const;
 107   test_value(str_0.compare("costa marbella"), gt);
 108   test_value(str_1.compare("costa rica"), lt);
 109   str_2 = str_0;
 110   test_value(str_2.compare("costa rica"), z);
 111   test_value(str_2.compare("cost"), gt);
 112   test_value(str_2.compare("costa ricans"), lt);
 113
 114   // int compare(size_type pos, size_type n1, const charT* str,
 115   //             size_type n2 = npos) const;
 116   test_value(str_1.compare(0, 6, "costa rica", 0, 6), z);
 117   test_value(str_1.compare(0, 7, "costa rica", 0, 7), lt);
 118   test_value(str_0.compare(0, 7, "costa marbella", 0, 7), gt);
 119
 120   return 0;
 121 }
 122
 123
 124 static int
 125 main ()
 126 {
 127   test01();
 128
 129   return 0;
 130 }
 131
 132 } // namespace operations_compare_1