libstdc++-v3/testsuite/ext/stdio_filebuf/char/10063-1.cc

   1 // Copyright (C) 2000-2013 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-require-fileio "" }
  19
  20 #include <cstdio>
  21 #include <fstream>
  22 #include <cstring>
  23 #include <ext/stdio_filebuf.h>
  24 #include <testsuite_hooks.h>
  25
  26 void test1()
  27 {
  28   using namespace std;
  29   bool test __attribute__((unused)) = true;
  30
  31   FILE* file = fopen("tmp_10063-1", "w");
  32   putc('0', file);
  33   putc('1', file);
  34   {
  35     __gnu_cxx::stdio_filebuf<char> sbuf(file, ios_base::out);
  36     sbuf.sputc('2');
  37     sbuf.sputc('3');
  38   }
  39   putc('4', file);
  40   fclose(file);
  41
  42   filebuf fbuf;
  43   fbuf.open("tmp_10063-1", ios_base::in);
  44   char buf[10];
  45   streamsize n = fbuf.sgetn(buf, sizeof(buf));
  46   fbuf.close();
  47
  48   VERIFY(n == 5);
  49   VERIFY(!memcmp(buf, "01234", 5));
  50 }
  51
  52 int main()
  53 {
  54   test1();
  55   return 0;
  56 }