1// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> 2 3// Copyright (C) 2001, 2002, 2003, 2009 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// { dg-require-fileio "" } 23 24#include <fstream> 25#include <testsuite_hooks.h> 26#include <testsuite_io.h> 27 28// @require@ %-*.tst %-*.txt 29// @diff@ %-*.tst %*.txt 30 31const char name_01[] = "seekpos-2io.tst"; // file with data in it 32 33void test05() 34{ 35 using namespace std; 36 using namespace __gnu_test; 37 38 typedef filebuf::int_type int_type; 39 typedef filebuf::pos_type pos_type; 40 typedef filebuf::off_type off_type; 41 42 bool test __attribute__((unused)) = true; 43 44 int_type c1; 45 int_type c2; 46 int_type c3; 47 48 pos_type pt_1(off_type(-1)); 49 pos_type pt_2(off_type(0)); 50 pos_type pt_3; 51 off_type off_1 = 0; 52 off_type off_2 = 0; 53 54 // seekpos 55 // pubseekpos(pos_type sp, ios_base::openmode) 56 // alters the stream position to sp 57 58 // in | out 59 { 60 constraint_filebuf fb; 61 fb.pubsetbuf(0, 0); 62 fb.open(name_01, ios_base::out | ios_base::in); 63 VERIFY( fb.unbuffered() ); 64 65 // beg 66 pt_1 = fb.pubseekoff(78, ios_base::beg); 67 off_1 = off_type(pt_1); 68 VERIFY( off_1 > 0 ); 69 c1 = fb.snextc(); //current in pointer +1 70 VERIFY( c1 == 't' ); 71 72 // cur 73 pt_3 = fb.pubseekoff(0, ios_base::cur); 74 fb.pubseekpos(pt_3); 75 c2 = fb.sputc('\n'); //test current out pointer 76 pt_3 = fb.pubseekoff(0, ios_base::cur); 77 fb.pubseekpos(pt_3); 78 c3 = fb.sgetc(); 79 fb.pubsync(); //resets pointers 80 pt_2 = fb.pubseekpos(pt_1); 81 off_2 = off_type(pt_2); 82 VERIFY( off_1 == off_2 ); 83 c3 = fb.snextc(); //current in pointer +1 84 VERIFY( c2 == c3 ); 85 86 // end 87 pt_1 = fb.pubseekoff(0, ios_base::end); 88 off_1 = off_type(pt_1); 89 VERIFY( off_1 > off_2 ); 90 fb.sputn("\nof the wonderful things he does!!\nok", 37); 91 fb.pubsync(); 92 VERIFY( fb.unbuffered() ); 93 fb.close(); 94 VERIFY( !fb.is_open() ); 95 } 96} 97 98int main() 99{ 100 test05(); 101 return 0; 102} 103