1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001-2013 Free Software Foundation, Inc.
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)
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.
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/>.
20 // 27.8.1.4 Overridden virtual functions
22 // { dg-require-fileio "" }
25 #include <testsuite_hooks.h>
26 #include <testsuite_io.h>
28 // @require@ %-*.tst %-*.txt
29 // @diff@ %-*.tst %*.txt
31 const char name_01[] = "tmp_sputbackc_2io.tst"; // empty file, need to create
36 using namespace __gnu_test;
38 typedef filebuf::int_type int_type;
39 typedef filebuf::traits_type traits_type;
40 typedef size_t size_type;
42 bool test __attribute__((unused)) = true;
43 streamsize strmsz_1, strmsz_2;
46 // int_type sputbackc(char_type c)
47 // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail
48 // otherwise decrements in_cur and returns *gptr()
52 constraint_filebuf fb_01;
53 fb_01.pubsetbuf(0, 0);
54 fb_01.open(name_01, ios_base::out | ios_base::in | ios_base::trunc);
55 VERIFY( fb_01.unbuffered() );
56 strmsz_1 = fb_01.sputn("racadabras", 10);//"abracadabras or what?"
57 strmsz_2 = fb_01.sputn(", i wanna reach out and", 10);
58 fb_01.pubseekoff(0, std::ios_base::cur);
59 c1 = fb_01.sgetc(); // -1
60 c2 = fb_01.sputbackc('z');
61 strmsz_2 = fb_01.in_avail();
65 VERIFY( 1 == strmsz_2 );
66 //test for _in_cur == _in_beg
67 // fb_01._M_out_beg = "bd23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZracada" etc
68 fb_01.pubseekoff(10, std::ios_base::beg);
70 fb_01.pubseekoff(0, std::ios_base::cur);
71 strmsz_1 = fb_01.in_avail();
74 c2 = fb_01.sputbackc('z');
75 strmsz_2 = fb_01.in_avail();
81 // test for replacing char with identical one
83 fb_01.pubseekoff(0, std::ios_base::cur);
87 fb_01.pubseekoff(0, std::ios_base::end);
88 strmsz_1 = fb_01.in_avail();
89 c2 = fb_01.sputbackc('a');
90 strmsz_2 = fb_01.in_avail();
93 VERIFY( strmsz_1 + 1 == strmsz_2 );
94 VERIFY( fb_01.unbuffered() );