libstdc++-v3/testsuite/ext/stdio_filebuf/char/10063-3.cc

   1 // Copyright (C) 2004-2024 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 // The ARM simulator does not provide support for "fstat", which
  19 // causes "sbumpc" to return an incorrect value.
  20 // { dg-do run { xfail arm*-*-elf arm*-*-eabi } }
  21
  22 // { dg-require-fileio "" }
  23
  24 #include <cstdio>
  25 #include <fstream>
  26 #include <ext/stdio_sync_filebuf.h>
  27 #include <testsuite_hooks.h>
  28
  29 void test3()
  30 {
  31   using namespace std;
  32
  33   filebuf fbuf;
  34   fbuf.open("tmp_10063-3", ios_base::out | ios_base::trunc);
  35   fbuf.sputn("01234", 5);
  36   fbuf.close();
  37
  38   FILE* file = fopen("tmp_10063-3", "r");
  39   int c = getc(file);
  40   VERIFY(c == '0');
  41   c = getc(file);
  42   VERIFY(c == '1');
  43   {
  44     __gnu_cxx::stdio_sync_filebuf<char> sbuf(file);
  45     c = sbuf.sbumpc();
  46     VERIFY(c == '2');
  47     c = sbuf.sbumpc();
  48     VERIFY(c == '3');
  49     c = sbuf.sbumpc();
  50     VERIFY(c == '4');
  51     c = sbuf.sgetc();
  52     VERIFY(c == EOF);
  53   }
  54   fclose(file);
  55 }
  56
  57 int main()
  58 {
  59   test3();
  60   return 0;
  61 }