libstdc++-v3/testsuite/backward/11460.cc

   1 // { dg-options "-Wno-deprecated" }
   2 // Copyright (C) 2003-2022 Free Software Foundation, Inc.
   3 //
   4 // This file is part of the GNU ISO C++ Library.  This library is free
   5 // software; you can redistribute it and/or modify it under the
   6 // terms of the GNU General Public License as published by the
   7 // Free Software Foundation; either version 3, or (at your option)
   8 // any later version.
   9
  10 // This library is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License along
  16 // with this library; see the file COPYING3.  If not see
  17 // <http://www.gnu.org/licenses/>.
  18
  19 #include <strstream>
  20 #include <testsuite_hooks.h>
  21
  22 class Buf : public std::strstreambuf
  23 {
  24 public:
  25   Buf(const char* p, std::streamsize n)
  26   : std::strstreambuf(p, n)
  27   { }
  28
  29   int_type pub_pbackfail(int_type c = traits_type::eof())
  30   {
  31     return pbackfail(c);
  32   }
  33 };
  34
  35 // libstdc++/11460
  36 void test01()
  37 {
  38   typedef std::strstreambuf::traits_type Traits;
  39   const char str[] = "a\xff";
  40
  41   Buf buf(str, 2);
  42
  43   Traits::int_type a = Traits::to_int_type('a');
  44   VERIFY( buf.sbumpc() == a );
  45   VERIFY( buf.sungetc() == a );
  46   VERIFY( buf.sbumpc() == a );
  47   VERIFY( buf.sputbackc('a') == a );
  48   VERIFY( buf.sbumpc() == a );
  49   VERIFY( buf.pub_pbackfail() != Traits::eof() );
  50   VERIFY( buf.sbumpc() == a );
  51   VERIFY( buf.pub_pbackfail(a) == a );
  52   buf.sbumpc();
  53
  54   Traits::int_type xff = Traits::to_int_type('\xff');
  55   VERIFY( buf.sbumpc() == xff );
  56   VERIFY( buf.sungetc() == xff );
  57   VERIFY( buf.sbumpc() == xff );
  58   VERIFY( buf.sputbackc('\xff') == xff );
  59   VERIFY( buf.sbumpc() == xff );
  60   VERIFY( buf.pub_pbackfail() != Traits::eof() );
  61   VERIFY( buf.sbumpc() == xff );
  62   VERIFY( buf.pub_pbackfail(xff) == xff );
  63 }
  64
  65 int main()
  66 {
  67   test01();
  68   return 0;
  69 }