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[] = "seekoff.txt"; 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 streamsize strmsz_1, strmsz_2; 44 45 int_type c1; 46 int_type c2; 47 int_type c3; 48 49 pos_type pt_1(off_type(-1)); 50 pos_type pt_2(off_type(0)); 51 off_type off_1 = 0; 52 off_type off_2 = 0; 53 54 // seekoff 55 // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which) 56 // alters the stream position to off 57 58 // in 59 { 60 constraint_filebuf fb; 61 fb.pubsetbuf(0, 0); 62 fb.open(name_01, ios_base::in); 63 VERIFY( fb.unbuffered() ); 64 65 //beg 66 strmsz_1 = fb.in_avail(); 67 pt_1 = fb.pubseekoff(2, ios_base::beg); 68 strmsz_2 = fb.in_avail(); 69 off_1 = off_type(pt_1); 70 VERIFY( off_1 > 0 ); 71 c1 = fb.snextc(); //current in pointer +1 72 VERIFY( c1 == '9' ); 73 fb.pubseekoff(3, ios_base::beg); 74 c2 = fb.sputc('\n'); //current in pointer +1 75 fb.pubseekoff(4, ios_base::beg); 76 c3 = fb.sgetc(); 77 VERIFY( c2 == traits_type::eof() ); 78 VERIFY( c3 == '9' ); 79 fb.pubsync(); 80 c1 = fb.sgetc(); 81 VERIFY( c1 == c3 ); 82 83 //cur 84 pt_2 = fb.pubseekoff(2, ios_base::cur); 85 off_2 = off_type(pt_2); 86 VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) ); 87 c1 = fb.snextc(); //current in pointer +1 88 VERIFY( c1 == '1' ); 89 fb.pubseekoff(0, ios_base::cur); 90 c2 = fb.sputc('x'); //test current out pointer 91 c3 = fb.sputc('\n'); 92 VERIFY( c2 == traits_type::eof() ); 93 VERIFY( c3 == traits_type::eof() ); 94 fb.pubseekoff(0, ios_base::cur); 95 c1 = fb.sgetc(); 96 fb.pubsync(); 97 c3 = fb.sgetc(); 98 VERIFY( c1 == c3 ); 99 100 //end 101 pt_2 = fb.pubseekoff(0, ios_base::end); 102 off_1 = off_type(pt_2); 103 VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends 104 c3 = fb.sputc('\n'); 105 strmsz_1 = fb.sputn("because because because. . .", 28); 106 VERIFY( strmsz_1 == 0 ); 107 fb.pubseekoff(-1, ios_base::end); 108 fb.sgetc(); 109 c1 = fb.sungetc(); 110 // Defect? retval of sungetc is not necessarily the character ungotten. 111 // So re-get it. 112 c1 = fb.sgetc(); 113 fb.pubsync(); 114 c3 = fb.sgetc(); 115 VERIFY( c1 == c3 ); 116 VERIFY( fb.unbuffered() ); 117 } 118} 119 120int main() 121{ 122 test05(); 123 return 0; 124} 125