libstdc++-v3/testsuite/27_io/basic_filebuf/sputn/char/2-io.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001, 2002, 2003 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 27.8.1.4 Overridden virtual functions
  22
  23 // { dg-require-fileio "" }
  24
  25 #include <fstream>
  26 #include <testsuite_hooks.h>
  27 #include <testsuite_io.h>
  28
  29 // @require@ %-*.tst %-*.txt
  30 // @diff@ %-*.tst %*.txt
  31
  32 const char name_01[] = "filebuf_virtuals-1.txt"; // file with data in it
  33 const char name_03[] = "tmp_sputn_2io.tst"; // empty file, need to create
  34
  35 void test05()
  36 {
  37   using namespace std;
  38   using namespace __gnu_test;
  39
  40   typedef filebuf::int_type     int_type;
  41   typedef filebuf::traits_type  traits_type;
  42   typedef size_t                        size_type;
  43
  44   bool test __attribute__((unused)) = true;
  45   streamsize                    strmsz_1, strmsz_2;
  46
  47   // streamsize sputn(const char_typs* s, streamsize n)
  48   // write up to n chars to out_cur from s, returning number assigned
  49   // NB *sputn will happily put '\0' into your stream if you give it a chance*
  50
  51   // in | out
  52   {
  53     constraint_filebuf fb_03;
  54     fb_03.pubsetbuf(0, 0);
  55     fb_03.open(name_03, ios_base::out | ios_base::in | ios_base::trunc);
  56     VERIFY( fb_03.unbuffered() );
  57     strmsz_1 = fb_03.sputn("racadabras", 10);//"abracadabras or what?"
  58     VERIFY( strmsz_1 == 10 );
  59     strmsz_2 = fb_03.sputn(", i wanna reach out and", 10);
  60     VERIFY( strmsz_2 == 10 );
  61     VERIFY( strmsz_1 == strmsz_2 );
  62     VERIFY( fb_03.unbuffered() );
  63   }
  64 }
  65
  66 int main()
  67 {
  68   test05();
  69   return 0;
  70 }