| // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
| |
| // Copyright (C) 2001-2013 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // 27.8.1.4 Overridden virtual functions |
| |
| // { dg-require-fileio "" } |
| |
| #include <fstream> |
| #include <testsuite_hooks.h> |
| #include <testsuite_io.h> |
| |
| // @require@ %-*.tst %-*.txt |
| // @diff@ %-*.tst %*.txt |
| |
| const char name_01[] = "tmp_sputbackc_2io.tst"; // empty file, need to create |
| |
| void test01() |
| { |
| using namespace std; |
| using namespace __gnu_test; |
| |
| typedef filebuf::int_type int_type; |
| typedef filebuf::traits_type traits_type; |
| typedef size_t size_type; |
| |
| bool test __attribute__((unused)) = true; |
| streamsize strmsz_1, strmsz_2; |
| int_type c1, c2, c3; |
| |
| // int_type sputbackc(char_type c) |
| // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail |
| // otherwise decrements in_cur and returns *gptr() |
| |
| // in | out |
| { |
| constraint_filebuf fb_01; |
| fb_01.pubsetbuf(0, 0); |
| fb_01.open(name_01, ios_base::out | ios_base::in | ios_base::trunc); |
| VERIFY( fb_01.unbuffered() ); |
| strmsz_1 = fb_01.sputn("racadabras", 10);//"abracadabras or what?" |
| strmsz_2 = fb_01.sputn(", i wanna reach out and", 10); |
| fb_01.pubseekoff(0, std::ios_base::cur); |
| c1 = fb_01.sgetc(); // -1 |
| c2 = fb_01.sputbackc('z'); |
| strmsz_2 = fb_01.in_avail(); |
| c3 = fb_01.sgetc(); |
| VERIFY( c3 == c2 ); |
| VERIFY( c1 != c3 ); |
| VERIFY( 1 == strmsz_2 ); |
| //test for _in_cur == _in_beg |
| // fb_01._M_out_beg = "bd23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZracada" etc |
| fb_01.pubseekoff(10, std::ios_base::beg); |
| fb_01.sputc('m'); |
| fb_01.pubseekoff(0, std::ios_base::cur); |
| strmsz_1 = fb_01.in_avail(); |
| c1 = fb_01.sgetc(); |
| fb_01.snextc(); |
| c2 = fb_01.sputbackc('z'); |
| strmsz_2 = fb_01.in_avail(); |
| c3 = fb_01.sgetc(); |
| VERIFY( c1 != c2 ); |
| VERIFY( c3 == c2 ); |
| VERIFY( c1 != c3 ); |
| VERIFY( c2 == 'z' ); |
| // test for replacing char with identical one |
| fb_01.snextc(); |
| fb_01.pubseekoff(0, std::ios_base::cur); |
| fb_01.sputc('u'); |
| fb_01.sputc('v'); |
| fb_01.sputc('a'); |
| fb_01.pubseekoff(0, std::ios_base::end); |
| strmsz_1 = fb_01.in_avail(); |
| c2 = fb_01.sputbackc('a'); |
| strmsz_2 = fb_01.in_avail(); |
| c3 = fb_01.sgetc(); |
| VERIFY( c3 == c2 ); |
| VERIFY( strmsz_1 + 1 == strmsz_2 ); |
| VERIFY( fb_01.unbuffered() ); |
| } |
| } |
| |
| int main() |
| { |
| test01(); |
| return 0; |
| } |