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[] = "tmp_sputbackc_2io.tst"; // empty file, need to create 31 32void test01() 33{ 34 using namespace std; 35 using namespace __gnu_test; 36 37 typedef filebuf::int_type int_type; 38 typedef filebuf::traits_type traits_type; 39 typedef size_t size_type; 40 41 bool test __attribute__((unused)) = true; 42 streamsize strmsz_1, strmsz_2; 43 int_type c1, c2, c3; 44 45 // int_type sputbackc(char_type c) 46 // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail 47 // otherwise decrements in_cur and returns *gptr() 48 49 // in | out 50 { 51 constraint_filebuf fb_01; 52 fb_01.pubsetbuf(0, 0); 53 fb_01.open(name_01, ios_base::out | ios_base::in | ios_base::trunc); 54 VERIFY( fb_01.unbuffered() ); 55 strmsz_1 = fb_01.sputn("racadabras", 10);//"abracadabras or what?" 56 strmsz_2 = fb_01.sputn(", i wanna reach out and", 10); 57 fb_01.pubseekoff(0, std::ios_base::cur); 58 c1 = fb_01.sgetc(); // -1 59 c2 = fb_01.sputbackc('z'); 60 strmsz_2 = fb_01.in_avail(); 61 c3 = fb_01.sgetc(); 62 VERIFY( c3 == c2 ); 63 VERIFY( c1 != c3 ); 64 VERIFY( 1 == strmsz_2 ); 65 //test for _in_cur == _in_beg 66 // fb_01._M_out_beg = "bd23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZracada" etc 67 fb_01.pubseekoff(10, std::ios_base::beg); 68 fb_01.sputc('m'); 69 fb_01.pubseekoff(0, std::ios_base::cur); 70 strmsz_1 = fb_01.in_avail(); 71 c1 = fb_01.sgetc(); 72 fb_01.snextc(); 73 c2 = fb_01.sputbackc('z'); 74 strmsz_2 = fb_01.in_avail(); 75 c3 = fb_01.sgetc(); 76 VERIFY( c1 != c2 ); 77 VERIFY( c3 == c2 ); 78 VERIFY( c1 != c3 ); 79 VERIFY( c2 == 'z' ); 80 // test for replacing char with identical one 81 fb_01.snextc(); 82 fb_01.pubseekoff(0, std::ios_base::cur); 83 fb_01.sputc('u'); 84 fb_01.sputc('v'); 85 fb_01.sputc('a'); 86 fb_01.pubseekoff(0, std::ios_base::end); 87 strmsz_1 = fb_01.in_avail(); 88 c2 = fb_01.sputbackc('a'); 89 strmsz_2 = fb_01.in_avail(); 90 c3 = fb_01.sgetc(); 91 VERIFY( c3 == c2 ); 92 VERIFY( strmsz_1 + 1 == strmsz_2 ); 93 VERIFY( fb_01.unbuffered() ); 94 } 95} 96 97int main() 98{ 99 test01(); 100 return 0; 101} 102