1// Copyright (C) 2003-2015 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// 27.8.1.4 Overridden virtual functions 19 20// { dg-require-fileio "" } 21 22#include <fstream> 23#include <cstdio> 24#include <cstring> 25#include <testsuite_hooks.h> 26 27// libstdc++/12875 28void test01() 29{ 30 using namespace std; 31 bool test __attribute__((unused)) = true; 32 33 const char* name = "tmp_setbuf4"; 34 static char buf[1024]; 35 36 FILE* out = fopen(name, "w"); 37 fputs("Hello, world", out); 38 fclose(out); 39 40 filebuf in; 41 in.open(name, ios_base::in); 42 char str[256]; 43 streamsize r = in.sgetn(str, 6); 44 VERIFY( r == 6 ); 45 VERIFY( !memcmp(str, "Hello,", 6) ); 46 in.pubsetbuf(buf, 1024); 47 r = in.sgetn(str, 6); 48 VERIFY( r == 6 ); 49 VERIFY( !memcmp(str, " world", 6) ); 50 in.close(); 51} 52 53// libstdc++/12875 54int main() 55{ 56 test01(); 57 return 0; 58} 59