libstdc++-v3/testsuite/22_locale/ctype/narrow/char/19955.cc

   1 // Copyright (C) 2005-2018 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18
  19 // 22.2.1.3.2 ctype<char> members
  20
  21 #include <locale>
  22 #include <cstring>
  23 #include <testsuite_hooks.h>
  24
  25 class Ctype1
  26 : public std::ctype<char>
  27 {
  28 protected:
  29   const char*
  30   do_narrow(const char* lo, const char* hi,
  31             char, char* to) const
  32   {
  33     for (int i = 0; lo != hi; ++lo, ++to, ++i)
  34       *to = *lo + i;
  35     return hi;
  36   }
  37 };
  38
  39 class Ctype2
  40 : public std::ctype<char>
  41 {
  42 protected:
  43   const char*
  44   do_narrow(const char* lo, const char* hi,
  45             char dflt, char* to) const
  46   {
  47     for (int i = 0; lo != hi; ++lo, ++to, ++i)
  48       if (*lo == '\000')
  49         *to = dflt;
  50       else
  51         *to = *lo;
  52     return hi;
  53   }
  54 };
  55
  56 // libstdc++/19955
  57 void test01()
  58 {
  59   using namespace std;
  60
  61   const char src[] = "abcd";
  62
  63   locale mylocale1(locale::classic(), new Ctype1);
  64   const ctype<char>& mc1 = use_facet<ctype<char> >(mylocale1);
  65
  66   char dst1[sizeof(src)];
  67   memset(dst1, 0, sizeof(src));
  68   char dst2[sizeof(src)];
  69   memset(dst2, 0, sizeof(src));
  70
  71   mc1.narrow(src, src + sizeof(src), '*', dst1);
  72   mc1.narrow(src, src + sizeof(src), '*', dst2);
  73
  74   VERIFY( !memcmp(dst1, "aceg\004", 5) );
  75   VERIFY( !memcmp(dst1, dst2, 5) );
  76
  77   locale mylocale2(locale::classic(), new Ctype2);
  78   const ctype<char>& mc2 = use_facet<ctype<char> >(mylocale2);
  79
  80   char dst3[sizeof(src)];
  81   memset(dst3, 0, sizeof(src));
  82   char dst4[sizeof(src)];
  83   memset(dst4, 0, sizeof(src));
  84
  85   mc2.narrow(src, src + sizeof(src), '*', dst3);
  86   mc2.narrow(src, src + sizeof(src), '*', dst4);
  87
  88   VERIFY( !memcmp(dst3, "abcd*", 5) );
  89   VERIFY( !memcmp(dst3, dst4, 5) );
  90 }
  91
  92 int main()
  93 {
  94   test01();
  95   return 0;
  96 }