libstdc++-v3/testsuite/21_strings/compare.cc

   1 // 980930 bkoz work with libstdc++v3
   2
   3 // Copyright (C) 1998-1999 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 21.3.6.8 basic_string::compare
  22 // int compare(const basic_string& str) const;
  23 // int compare(size_type pos1, size_type n1, const basic_string& str) const;
  24 // int compare(size_type pos1, size_type n1, const basic_string& str,
  25 //             size_type pos2, size_type n2) const;
  26 // int compare(const charT* s) const;
  27 // int compare(size_type pos1, size_type n1,
  28 //             const charT* s, size_type n2 = npos) const;
  29
  30 // NB compare should be thought of as a lexographical compare, ie how
  31 // things would be sorted in a dictionary.
  32
  33 #include <string>
  34 #include <debug_assert.h>
  35
  36 enum want_value {lt=0, z=1, gt=2};
  37
  38 int
  39 test_value(int result, want_value expected);
  40
  41 int
  42 test_value(int result, want_value expected)
  43 {
  44   bool pass = false;
  45
  46   switch (expected) {
  47   case lt:
  48     if (result < 0)
  49       pass = true;
  50     break;
  51   case z:
  52     if (!result)
  53       pass = true;
  54     break;
  55   case gt:
  56     if (result > 0)
  57       pass = true;
  58     break;
  59   default:
  60     pass = false; //should not get here
  61   }
  62
  63 #ifdef DEBUG_ASSERT
  64   assert(pass);
  65 #endif
  66
  67   return 0;
  68 }
  69
  70
  71 int
  72 test01()
  73 {
  74   using namespace std;
  75
  76   string        str_0("costa rica");
  77   string        str_1("costa marbella");
  78   string        str_2;
  79
  80   //sanity check
  81   test_value(strcmp("costa marbella", "costa rica"), lt);
  82   test_value(strcmp("costa rica", "costa rica"), z);
  83   test_value(strcmp(str_1.data(), str_0.data()), lt);
  84   test_value(strcmp(str_0.data(), str_1.data()), gt);
  85   test_value(strncmp(str_1.data(), str_0.data(), 6), z);
  86   test_value(strncmp(str_1.data(), str_0.data(), 14), lt);
  87   test_value(memcmp(str_1.data(), str_0.data(), 6), z);
  88   test_value(memcmp(str_1.data(), str_0.data(), 14), lt);
  89   test_value(memcmp("costa marbella", "costa rica", 14), lt);
  90
  91   // int compare(const basic_string& str) const;
  92   test_value(str_0.compare(str_1), gt); //because r>m
  93   test_value(str_1.compare(str_0), lt); //because m<r
  94   str_2 = str_0;
  95   test_value(str_2.compare(str_0), z);
  96   str_2 = "cost";
  97   test_value(str_2.compare(str_0), lt);
  98   str_2 = "costa ricans";
  99   test_value(str_2.compare(str_0), gt);
 100
 101   // int compare(size_type pos1, size_type n1, const basic_string& str) const;
 102   test_value(str_1.compare(0, 6, str_0), lt);
 103   str_2 = "cost";
 104   test_value(str_1.compare(0, 4, str_2), z);
 105   test_value(str_1.compare(0, 5, str_2), gt);
 106
 107   // int compare(size_type pos1, size_type n1, const basic_string& str,
 108   //             size_type pos2, size_type n2) const;
 109   test_value(str_1.compare(0, 6, str_0, 0, 6), z);
 110   test_value(str_1.compare(0, 7, str_0, 0, 7), lt);
 111   test_value(str_0.compare(0, 7, str_1, 0, 7), gt);
 112
 113   // int compare(const charT* s) const;
 114   test_value(str_0.compare("costa marbella"), gt);
 115   test_value(str_1.compare("costa rica"), lt);
 116   str_2 = str_0;
 117   test_value(str_2.compare("costa rica"), z);
 118   test_value(str_2.compare("cost"), gt);
 119   test_value(str_2.compare("costa ricans"), lt);
 120
 121   // int compare(size_type pos, size_type n1, const charT* str,
 122   //             size_type n2 = npos) const;
 123   test_value(str_1.compare(0, 6, "costa rica", 0, 6), z);
 124   test_value(str_1.compare(0, 7, "costa rica", 0, 7), lt);
 125   test_value(str_0.compare(0, 7, "costa marbella", 0, 7), gt);
 126
 127   return 0;
 128 }
 129
 130
 131 int
 132 main()
 133 {
 134   test01();
 135
 136   return 0;
 137 }