libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/3.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2016 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.8.1.4 Overridden virtual functions
  21
  22 // { dg-require-fileio "" }
  23
  24 #include <fstream>
  25 #include <cstring>
  26 #include <testsuite_hooks.h>
  27
  28 void test03()
  29 {
  30   using namespace std;
  31
  32   bool test __attribute__((unused)) = true;
  33   char buf[512];
  34   const char* strlit = "how to tell a story and other essays: mark twain";
  35   const size_t strlitsize = std::strlen(strlit);
  36   filebuf fbuf01;
  37   // NB: +2 otherwise sputn is optimized to a direct write,
  38   // bypassing the buffer.
  39   fbuf01.pubsetbuf(buf, strlitsize + 2);
  40   fbuf01.open("tmp_setbuf3", ios_base::out);
  41
  42   fbuf01.sputn(strlit, strlitsize);
  43   VERIFY( std::strncmp(strlit, buf, strlitsize) == 0 );
  44 }
  45
  46 int main()
  47 {
  48   test03();
  49   return 0;
  50 }