gomp-20050608-branch/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, 2004, 2005
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library 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 library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // 21.1.1 Characher traits requirements
  23
  24 #include <string>
  25 #include <testsuite_hooks.h>
  26
  27 void test02(void)
  28 {
  29   bool test __attribute__((unused)) = true;
  30   const std::wstring str_01(L"zuma beach");
  31   const std::wstring str_02(L"montara and ocean beach");
  32
  33   // 21.1.1 character traits requirements
  34
  35   // Key for decoding what function signatures really mean:
  36   // X        == char_traits<_CharT>
  37   // [c,d]    == _CharT
  38   // [p,q]    == const _CharT*
  39   // s        == _CharT*
  40   // [n,i,j]  == size_t
  41   // f        == X::int_type
  42   // pos      == X::pos_type
  43   // state    == X::state_type
  44
  45   // void X::assign(wchar_t c, wchar_t d)
  46   // assigns c = d;
  47   wchar_t c1 = L'z';
  48   wchar_t c2 = L'u';
  49   VERIFY( c1 != c2 );
  50   std::char_traits<wchar_t>::assign(c1,c2);
  51   VERIFY( c1 == L'u' );
  52
  53   // char* X::move(char* s, const char* p, size_t n)
  54   // for each i in [0,n) performs X::assign(s[i], p[i]). Copies
  55   // correctly even where p is in [s, s + n), and yields s.
  56   wchar_t array1[] = {L'z', L'u', L'm', L'a', L' ', L'b', L'e', L'a', L'c', L'h',  0};
  57   const wchar_t str_lit1[] = L"montara and ocean beach";
  58   const wchar_t str_lit2[] = L"boracay, philippines";
  59   const int len1 = sizeof(str_lit1)/sizeof(wchar_t);
  60   const int len2 = sizeof(str_lit2)/sizeof(wchar_t);
  61   wchar_t array2[len1 + len2 - 1]; // two terminating chars
  62   std::char_traits<wchar_t>::copy(array2, str_lit2, len2);
  63
  64   VERIFY( str_lit1[0] == 'm' );
  65   c1 = array2[0];
  66   c2 = str_lit1[0];
  67   wchar_t c3 = array2[1];
  68   wchar_t c4 = str_lit1[1];
  69   std::char_traits<wchar_t>::move(array2, str_lit1, 0);
  70   VERIFY( array2[0] == c1 );
  71   VERIFY( str_lit1[0] == c2 );
  72   std::char_traits<wchar_t>::move(array2, str_lit1, 1);
  73   VERIFY( array2[0] == c2 );
  74   VERIFY( str_lit1[0] == c2 );
  75   VERIFY( array2[1] == c3 );
  76   VERIFY( str_lit1[1] == c4 );
  77   std::char_traits<wchar_t>::move(array2, str_lit1, 2);
  78   VERIFY( array2[0] == c2 );
  79   VERIFY( str_lit1[0] == c2 );
  80   VERIFY( array2[1] == c4 );
  81   VERIFY( str_lit1[1] == c4 );
  82
  83   wchar_t* pc1 = array1 + 1;
  84   c1 = pc1[0];
  85   c2 = array1[0];
  86   VERIFY( c1 != c2 );
  87   wchar_t* pc2 = std::char_traits<wchar_t>::move(array1, pc1, 0);
  88   c3 = pc1[0];
  89   c4 = array1[0];
  90   VERIFY( c1 == c3 );
  91   VERIFY( c2 == c4 );
  92   VERIFY( pc2 == array1 );
  93
  94   c1 = pc1[0];
  95   c2 = array1[0];
  96   wchar_t* pc3 = pc1;
  97   pc2 = std::char_traits<wchar_t>::move(array1, pc1, 10);
  98   c3 = pc1[0];
  99   c4 = array1[0];
 100   VERIFY( c1 != c3 ); // underlying wchar_t array changed.
 101   VERIFY( c4 != c3 );
 102   VERIFY( pc2 == array1 );
 103   VERIFY( pc3 == pc1 ); // but pointers o-tay
 104   c1 = *(str_01.data());
 105   c2 = array1[0];
 106   VERIFY( c1 != c2 );
 107 }
 108
 109 int main()
 110 {
 111   test02();
 112   return 0;
 113 }