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

   1 // 1999-06-03 bkoz
   2 // 2003-07-22 Matt Austern
   3
   4 // Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   5 // Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 2, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING.  If not, write to the Free
  20 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  21 // USA.
  22
  23 // 21.1.1 Character traits requirements
  24 // Make sure we can instantiate char_traits and basic_string for
  25 // charT = 'short', and make sure the char_traits memeber functions
  26 // satisfy the requirements of 21.1.1.
  27
  28 #include <string>
  29 #include <cstring>
  30 #include <testsuite_hooks.h>
  31
  32 void test02(void)
  33 {
  34   typedef short char_type;
  35   bool test __attribute__((unused)) = true;
  36
  37   // 21.1.1 character traits requirements
  38
  39   // Key for decoding what function signatures really mean:
  40   // X                == char_traits<_CharT>
  41   // [c,d]    == _CharT
  42   // [p,q]    == const _CharT*
  43   // s                == _CharT*
  44   // [n,i,j]  == size_t
  45   // f                == X::int_type
  46   // pos      == X::pos_type
  47   // state    == X::state_type
  48
  49   // void X::assign(char_type c, char_type d)
  50   // assigns c = d;
  51   char_type c1 = 'z';
  52   char_type c2 = 'u';
  53   VERIFY( c1 != c2 );
  54   std::char_traits<char_type>::assign(c1,c2);
  55   VERIFY( c1 == 'u' );
  56
  57   // bool X::eq(char_type c, char_type d)
  58   c1 = 'z';
  59   c2 = 'u';
  60   VERIFY ( !std::char_traits<char_type>::eq(c1, c2) );
  61   VERIFY ( std::char_traits<char_type>::eq(c1, c1) );
  62   VERIFY ( std::char_traits<char_type>::eq(c2, c2) );
  63
  64   // bool X::lt(char_type c, char_type d)
  65   c1 = 'z';
  66   c2 = 'u';
  67   VERIFY ( std::char_traits<char_type>::lt(c2, c1) );
  68   VERIFY ( !std::char_traits<char_type>::lt(c1, c2) );
  69   VERIFY ( !std::char_traits<char_type>::lt(c1, c1) );
  70   VERIFY ( !std::char_traits<char_type>::lt(c2, c2) );
  71
  72   // char_type* X::move(char_type* s, const char_type* p, size_t n)
  73   // for each i in [0,n) performs X::assign(s[i], p[i]). Copies
  74   // correctly even where p is in [s, s + n), and yields s.
  75   char_type array1[] = {'z', 'u', 'm', 'a', ' ', 'b', 'e', 'a', 'c', 'h',  0};
  76   const std::basic_string<char_type> str_01(array1 + 0, array1 + 10);
  77
  78   const char_type str_lit1[] = {'m', 'o', 'n', 't', 'a', 'r', 'a', ' ', 'a', 'n', 'd', ' ', 'o', 'c', 'e', 'a', 'n', ' ', 'b', 'e', 'a', 'c', 'h', 0};
  79
  80   int len = sizeof(str_lit1)/sizeof(char_type) + sizeof(array1)/sizeof(char_type) - 1;
  81   // two terminating chars
  82   char_type array3[] = {'b', 'o', 'r', 'a', 'c', 'a', 'y', ',', ' ', 'p', 'h', 'i', 'l', 'i', 'p', 'p', 'i', 'n', 'e', 's', 0};
  83   char_type array2[len];
  84   std::char_traits<char_type>::copy(array2, array3, len);
  85
  86   VERIFY( str_lit1[0] == 'm' );
  87   c1 = array2[0];
  88   c2 = str_lit1[0];
  89   char_type c3 = array2[1];
  90   char_type c4 = str_lit1[1];
  91   std::char_traits<char_type>::move(array2, str_lit1, 0);
  92   VERIFY( array2[0] == c1 );
  93   VERIFY( str_lit1[0] == c2 );
  94   std::char_traits<char_type>::move(array2, str_lit1, 1);
  95   VERIFY( array2[0] == c2 );
  96   VERIFY( str_lit1[0] == c2 );
  97   VERIFY( array2[1] == c3 );
  98   VERIFY( str_lit1[1] == c4 );
  99   std::char_traits<char_type>::move(array2, str_lit1, 2);
 100   VERIFY( array2[0] == c2 );
 101   VERIFY( str_lit1[0] == c2 );
 102   VERIFY( array2[1] == c4 );
 103   VERIFY( str_lit1[1] == c4 );
 104
 105   char_type* pc1 = array1 + 1;
 106   c1 = pc1[0];
 107   c2 = array1[0];
 108   VERIFY( c1 != c2 );
 109   char_type* pc2 = std::char_traits<char_type>::move(array1, pc1, 0);
 110   c3 = pc1[0];
 111   c4 = array1[0];
 112   VERIFY( c1 == c3 );
 113   VERIFY( c2 == c4 );
 114   VERIFY( pc2 == array1 );
 115
 116   c1 = pc1[0];
 117   c2 = array1[0];
 118   char_type* pc3 = pc1;
 119   pc2 = std::char_traits<char_type>::move(array1, pc1, 10);
 120   c3 = pc1[0];
 121   c4 = array1[0];
 122   VERIFY( c1 != c3 ); // underlying char_type array changed.
 123   VERIFY( c4 != c3 );
 124   VERIFY( pc2 == array1 );
 125   VERIFY( pc3 == pc1 ); // but pointers o-tay
 126   c1 = *(str_01.data());
 127   c2 = array1[0];
 128   VERIFY( c1 != c2 );
 129
 130   // size_t X::length(const char_type* p)
 131   len = std::char_traits<char_type>::length(str_lit1);
 132   VERIFY( len == sizeof(str_lit1) / sizeof(char_type) - 1 );
 133
 134   // const char_type* X::find(const char_type* s, size_t n, char_type c)
 135   const int N4 = sizeof(str_lit1) / sizeof(char_type);
 136   const char_type* pc4 = std::char_traits<char_type>::find(str_lit1, N4, 'a');
 137   VERIFY( pc4 != 0 );
 138   VERIFY( *pc4 == 'a' );
 139
 140   pc4 = std::char_traits<char_type>::find(str_lit1, N4, 0x0a73);
 141   VERIFY( pc4 == 0 );
 142
 143   // char_type* X::assign(char_type* s, size_t n, char_type c)
 144   len = sizeof(array2) / sizeof(char_type);
 145   std::memset(array2, 0xaf, len * sizeof(char_type));
 146   VERIFY( array2[0] != 0x15a8 );
 147
 148   pc1 = std::char_traits<char_type>::assign (array2, len, 0x15a8);
 149   VERIFY( pc1 == array2 );
 150   for (int i = 0; i < len; ++i)
 151     VERIFY( array2[i] == 0x15a8 );
 152
 153   // char_type* X::copy(char_type* s, const char_type* p, size_t n)
 154   int n1 = sizeof(str_lit1) / sizeof(char_type);
 155   pc1 = std::char_traits<char_type>::copy(array2, str_lit1, n1);
 156   len = std::char_traits<char_type>::length(array2);
 157   VERIFY( len == n1 - 1 );
 158   for (int i = 0; i < len; ++i)
 159     VERIFY( str_lit1[i] == array2[i] );
 160
 161   // int X::compare(const char_type* p, const char_type* q, size_t n)
 162   const char_type* pconst1 = str_01.data();
 163   const char_type* pconst2 = str_lit1;
 164
 165   VERIFY( std::char_traits<char_type>::compare(pconst1, pconst2, 10) > 0 );
 166   VERIFY( std::char_traits<char_type>::compare(pconst2, pconst1, 10) < 0 );
 167   VERIFY( std::char_traits<char_type>::compare(pconst1, pconst1, 10) == 0 );
 168   VERIFY( std::char_traits<char_type>::compare(pconst2, pconst2, 10) == 0 );
 169 }
 170
 171 int main()
 172 {
 173   test02();
 174   return 0;
 175 }