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_1io.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.open(name_01, ios_base::out | ios_base::in | ios_base::trunc);
53    VERIFY( !fb_01.write_position() );
54    VERIFY( !fb_01.read_position() );
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.write_position() );
94    VERIFY( fb_01.read_position() );
95  }
96}
97
98int main()
99{
100  test01();
101  return 0;
102}
103