libstdc++-v3/testsuite/21_strings/char_traits/requirements/wchar_t/1.cc

   1 // 1999-06-03 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2003 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 // 21.1.1 Characher traits requirements
  22
  23 #include <string>
  24 #include <testsuite_hooks.h>
  25
  26 void test02(void)
  27 {
  28   bool test __attribute__((unused)) = true;
  29   const std::wstring str_01(L"zuma beach");
  30   const std::wstring str_02(L"montara and ocean beach");
  31
  32   // 21.1.1 character traits requirements
  33
  34   // Key for decoding what function signatures really mean:
  35   // X                == char_traits<_CharT>
  36   // [c,d]    == _CharT
  37   // [p,q]    == const _CharT*
  38   // s                == _CharT*
  39   // [n,i,j]  == size_t
  40   // f                == X::int_type
  41   // pos      == X::pos_type
  42   // state    == X::state_type
  43
  44   // void X::assign(wchar_t c, wchar_t d)
  45   // assigns c = d;
  46   wchar_t c1 = L'z';
  47   wchar_t c2 = L'u';
  48   VERIFY( c1 != c2 );
  49   std::char_traits<wchar_t>::assign(c1,c2);
  50   VERIFY( c1 == L'u' );
  51
  52   // char* X::move(char* s, const char* p, size_t n)
  53   // for each i in [0,n) performs X::assign(s[i], p[i]). Copies
  54   // correctly even where p is in [s, s + n), and yields s.
  55   wchar_t array1[] = {L'z', L'u', L'm', L'a', L' ', L'b', L'e', L'a', L'c', L'h',  0};
  56   const wchar_t str_lit1[] = L"montara and ocean beach";
  57   int len = sizeof(str_lit1) + sizeof(array1) - 1; // two terminating chars
  58   wchar_t array2[len];
  59
  60   VERIFY( str_lit1[0] == 'm' );
  61   c1 = array2[0];
  62   c2 = str_lit1[0];
  63   wchar_t c3 = array2[1];
  64   wchar_t c4 = str_lit1[1];
  65   std::char_traits<wchar_t>::move(array2, str_lit1, 0);
  66   VERIFY( array2[0] == c1 );
  67   VERIFY( str_lit1[0] == c2 );
  68   std::char_traits<wchar_t>::move(array2, str_lit1, 1);
  69   VERIFY( array2[0] == c2 );
  70   VERIFY( str_lit1[0] == c2 );
  71   VERIFY( array2[1] == c3 );
  72   VERIFY( str_lit1[1] == c4 );
  73   std::char_traits<wchar_t>::move(array2, str_lit1, 2);
  74   VERIFY( array2[0] == c2 );
  75   VERIFY( str_lit1[0] == c2 );
  76   VERIFY( array2[1] == c4 );
  77   VERIFY( str_lit1[1] == c4 );
  78
  79   wchar_t* pc1 = array1 + 1;
  80   c1 = pc1[0];
  81   c2 = array1[0];
  82   VERIFY( c1 != c2 );
  83   wchar_t* pc2 = std::char_traits<wchar_t>::move(array1, pc1, 0);
  84   c3 = pc1[0];
  85   c4 = array1[0];
  86   VERIFY( c1 == c3 );
  87   VERIFY( c2 == c4 );
  88   VERIFY( pc2 == array1 );
  89
  90   c1 = pc1[0];
  91   c2 = array1[0];
  92   wchar_t* pc3 = pc1;
  93   pc2 = std::char_traits<wchar_t>::move(array1, pc1, 10);
  94   c3 = pc1[0];
  95   c4 = array1[0];
  96   VERIFY( c1 != c3 ); // underlying wchar_t array changed.
  97   VERIFY( c4 != c3 );
  98   VERIFY( pc2 == array1 );
  99   VERIFY( pc3 == pc1 ); // but pointers o-tay
 100   c1 = *(str_01.data());
 101   c2 = array1[0];
 102   VERIFY( c1 != c2 );
 103 }
 104
 105 int main()
 106 {
 107   test02();
 108   return 0;
 109 }