libstdc++-v3/testsuite/27_io/basic_istream/extractors_character/char/lwg2499.cc

   1 // Copyright (C) 2020-2024 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 // { dg-do run { target c++20 } }
  19
  20 // LWG 2499
  21 // operator>>(basic_istream&, CharT*) makes it hard to avoid buffer overflows
  22
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25
  26 template<typename T>
  27 void
  28 test(std::basic_istream<char, T>& in)
  29 {
  30   char pc[3];
  31   in >> pc;
  32   VERIFY( in.good() );
  33   VERIFY( pc[0] == 'a' && pc[1] == 'b' && pc[2] == '\0' );
  34
  35   signed char sc[4];
  36   in >> sc;
  37   VERIFY( in.good() );
  38   VERIFY( sc[0] == 'c' && sc[1] == 'd' && sc[2] == 'e' && sc[3] ==  '\0' );
  39
  40   unsigned char uc[4];
  41   in >> uc;
  42   VERIFY( in.good() );
  43   VERIFY( uc[0] == 'f' && uc[1] == 'g' && uc[2] == 'h' && uc[3] ==  '\0' );
  44
  45   pc[2] = '#';
  46   in >> pc;
  47   VERIFY( in.good() );
  48   VERIFY( pc[0] == 'i' && pc[1] == '\0' && pc[2] == '#' );
  49
  50   in >> pc;
  51   VERIFY( in.good() );
  52   VERIFY( pc[0] == 'j' && pc[1] == 'k' && pc[2] == '\0' );
  53
  54   pc[2] = '#';
  55   in >> pc;
  56   VERIFY( in.eof() );
  57   VERIFY( pc[0] == 'l' && pc[1] == '\0' && pc[2] == '#' );
  58 }
  59
  60 void
  61 test01()
  62 {
  63   std::istringstream in("abcdefghi jk l");
  64   test(in);
  65 }
  66
  67 void
  68 test02()
  69 {
  70   struct CT : std::char_traits<char> { };
  71   std::basic_istringstream<char, CT> in("abcdefghi jk l");
  72   test(in);
  73 }
  74
  75 int main()
  76 {
  77   test01();
  78   test02();
  79 }