1// { dg-require-fileio "" } 2 3// Copyright (C) 2010-2015 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// 27.8.1.4 Overridden virtual functions 21 22#include <fstream> 23#include <cwchar> 24#include <cstring> 25#include <testsuite_hooks.h> 26 27void test01() 28{ 29 using namespace std; 30 bool test __attribute__((unused)) = true; 31 32 typedef wfilebuf::pos_type pos_type; 33 const char name[] = "tmp_seekoff-4.tst"; 34 35 const size_t size = 12; 36 wchar_t buf[size]; 37 streamsize n; 38 39 wfilebuf fb; 40 fb.open(name, ios_base::in | ios_base::out | ios_base::trunc); 41 42 n = fb.sputn(L"abcd", 4); 43 VERIFY( n == 4 ); 44 45 fb.pubseekoff(0, ios_base::beg); 46 n = fb.sgetn(buf, 3); 47 VERIFY( n == 3 ); 48 VERIFY( !wmemcmp(buf, L"abc", 3) ); 49 50 // Check read => write without pubseekoff(0, ios_base::cur) 51 52 n = fb.sputn(L"ef", 2); 53 VERIFY( n == 2 ); 54 55 fb.pubseekoff(0, ios_base::beg); 56 57 n = fb.sgetn(buf, size); 58 VERIFY( n == 5 ); 59 VERIFY( !wmemcmp(buf, L"abcef", 5) ); 60 61 fb.pubseekoff(0, ios_base::beg); 62 n = fb.sputn(L"gh", 2); 63 VERIFY( n == 2 ); 64 65 // Check write => read without pubseekoff(0, ios_base::cur) 66 67 n = fb.sgetn( buf, 3 ); 68 VERIFY( !memcmp(buf, L"cef", 3) ); 69 70 n = fb.sputn(L"ijkl", 4); 71 VERIFY( n == 4 ); 72 73 fb.pubseekoff(0, ios_base::beg); 74 n = fb.sgetn(buf, 2); 75 VERIFY( n == 2 ); 76 VERIFY( !wmemcmp(buf, L"gh", 2) ); 77 78 fb.pubseekoff(0, ios_base::end); 79 n = fb.sputn(L"mno", 3); 80 VERIFY( n == 3 ); 81 82 fb.pubseekoff(0, ios_base::beg); 83 n = fb.sgetn(buf, size); 84 VERIFY( n == 12 ); 85 VERIFY( !wmemcmp(buf, L"ghcefijklmno", 12) ); 86 87 fb.close(); 88} 89 90int main() 91{ 92 test01(); 93 return 0; 94} 95