1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001, 2002, 2003 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 2, 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 COPYING. If not, write to the Free
18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 // 27.8.1.4 Overridden virtual functions
23 // { dg-require-fileio "" }
26 #include <testsuite_hooks.h>
27 #include <testsuite_io.h>
29 // @require@ %-*.tst %-*.txt
30 // @diff@ %-*.tst %*.txt
32 const char name_01[] = "tmp_sputbackc_2io.tst"; // empty file, need to create
37 using namespace __gnu_test;
39 typedef filebuf::int_type int_type;
40 typedef filebuf::traits_type traits_type;
41 typedef size_t size_type;
43 bool test __attribute__((unused)) = true;
44 streamsize strmsz_1, strmsz_2;
47 // int_type sputbackc(char_type c)
48 // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail
49 // otherwise decrements in_cur and returns *gptr()
53 constraint_filebuf fb_01;
54 fb_01.pubsetbuf(0, 0);
55 fb_01.open(name_01, ios_base::out | ios_base::in | ios_base::trunc);
56 VERIFY( fb_01.unbuffered() );
57 strmsz_1 = fb_01.sputn("racadabras", 10);//"abracadabras or what?"
58 strmsz_2 = fb_01.sputn(", i wanna reach out and", 10);
59 fb_01.pubseekoff(0, std::ios_base::cur);
60 c1 = fb_01.sgetc(); // -1
61 c2 = fb_01.sputbackc('z');
62 strmsz_2 = fb_01.in_avail();
66 VERIFY( 1 == strmsz_2 );
67 //test for _in_cur == _in_beg
68 // fb_01._M_out_beg = "bd23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZracada" etc
69 fb_01.pubseekoff(10, std::ios_base::beg);
71 fb_01.pubseekoff(0, std::ios_base::cur);
72 strmsz_1 = fb_01.in_avail();
75 c2 = fb_01.sputbackc('z');
76 strmsz_2 = fb_01.in_avail();
82 // test for replacing char with identical one
84 fb_01.pubseekoff(0, std::ios_base::cur);
88 fb_01.pubseekoff(0, std::ios_base::end);
89 strmsz_1 = fb_01.in_avail();
90 c2 = fb_01.sputbackc('a');
91 strmsz_2 = fb_01.in_avail();
94 VERIFY( strmsz_1 + 1 == strmsz_2 );
95 VERIFY( fb_01.unbuffered() );