1// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> 2 3// Copyright (C) 2001, 2002, 2003 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 2, 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 COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// 27.8.1.4 Overridden virtual functions 22 23#include <fstream> 24#include <testsuite_hooks.h> 25#include <testsuite_io.h> 26 27// @require@ %-*.tst %-*.txt 28// @diff@ %-*.tst %*.txt 29 30const char name_01[] = "seekpos.txt"; // file with data in it 31 32void test05() 33{ 34 using namespace std; 35 using namespace __gnu_test; 36 37 typedef filebuf::int_type int_type; 38 typedef filebuf::pos_type pos_type; 39 typedef filebuf::off_type off_type; 40 typedef filebuf::traits_type traits_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 59 { 60 constraint_filebuf fb; 61 fb.open(name_01, ios_base::in); 62 VERIFY( !fb.write_position() ); 63 64 // beg 65 pt_1 = fb.pubseekoff(78, ios_base::beg); 66 off_1 = off_type(pt_1); 67 VERIFY( off_1 > 0 ); 68 c1 = fb.snextc(); //current in pointer +1 69 VERIFY( c1 == 't' ); 70 71 // cur 72 pt_3 = fb.pubseekoff(0, ios_base::cur); 73 fb.pubseekpos(pt_3); 74 c2 = fb.sputc('\n'); //test current out pointer 75 pt_3 = fb.pubseekoff(0, ios_base::cur); 76 fb.pubseekpos(pt_3); 77 c3 = fb.sgetc(); 78 fb.pubsync(); //resets pointers 79 pt_2 = fb.pubseekpos(pt_1); 80 off_2 = off_type(pt_2); 81 VERIFY( off_1 == off_2 ); 82 c3 = fb.snextc(); //current in pointer +1 83 VERIFY( c2 == traits_type::eof() ); 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.write_position() ); 93 fb.close(); 94 VERIFY( !fb.is_open() ); 95 } 96} 97 98int main() 99{ 100 test05(); 101 return 0; 102} 103