1// 2003-04-12 Paolo Carlini <pcarlini at unitus dot it> 2 3// Copyright (C) 2003-2015 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// stdio_filebuf.h 21 22// { dg-require-fileio "" } 23 24#include <ext/stdio_filebuf.h> 25#include <cstdio> 26#include <fstream> 27#include <cstring> 28#include <testsuite_hooks.h> 29 30// Small stack-based buffers (i.e., using _M_unbuf) were not flushed 31// out by _M_really_overflow upon overflow. 32void test01() 33{ 34 using namespace std; 35 bool test __attribute__((unused)) = true; 36 37 const char* name = "tmp_file1"; 38 FILE* file = fopen(name, "w"); 39 { 40 using namespace __gnu_cxx; 41 stdio_filebuf<char> sbuf(file, ios_base::out, 2); 42 sbuf.sputc('T'); 43 sbuf.sputc('S'); 44 sbuf.sputc('P'); 45 } 46 fclose(file); 47 48 filebuf fbuf; 49 fbuf.open(name, ios_base::in); 50 char buf[10]; 51 streamsize n = fbuf.sgetn(buf, sizeof(buf)); 52 fbuf.close(); 53 54 VERIFY( n == 3 ); 55 VERIFY( !memcmp(buf, "TSP", 3) ); 56} 57 58int main() 59{ 60 test01(); 61} 62