libstdc++-v3/testsuite/27_io/basic_filebuf/sputn/char/1-in.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2024 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 // C++98 27.8.1.4 Overridden virtual functions
  21
  22 // { dg-additional-files "filebuf_virtuals-1.txt" }
  23
  24 #include <fstream>
  25 #include <testsuite_hooks.h>
  26 #include <testsuite_io.h>
  27
  28 const char name_01[] = "filebuf_virtuals-1.txt"; // file with data in it
  29
  30 void test05()
  31 {
  32   using namespace std;
  33   using namespace __gnu_test;
  34
  35   typedef filebuf::int_type     int_type;
  36   typedef filebuf::traits_type  traits_type;
  37   typedef size_t                        size_type;
  38
  39   streamsize                    strmsz_1;
  40
  41   // streamsize sputn(const char_typs* s, streamsize n)
  42   // write up to n chars to out_cur from s, returning number assigned
  43   // NB *sputn will happily put '\0' into your stream if you give it a chance*
  44
  45   // in
  46   {
  47     constraint_filebuf fb_01;
  48     fb_01.open(name_01, ios_base::in);
  49     VERIFY( !fb_01.write_position() );
  50     strmsz_1 = fb_01.sputn("racadabra", 10);
  51     VERIFY( strmsz_1 == 0 );
  52     VERIFY( !fb_01.write_position() );
  53   }
  54 }
  55
  56 int main()
  57 {
  58   test05();
  59   return 0;
  60 }