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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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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 | ||
7d6a0993 | 30 | const char name_01[] = "seekpos.txt"; // file with data in it |
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31 | |
32 | void test05() | |
33 | { | |
34 | using namespace std; | |
aecf642c | 35 | using namespace __gnu_test; |
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36 | |
37 | typedef filebuf::int_type int_type; | |
38 | typedef filebuf::pos_type pos_type; | |
39 | typedef filebuf::off_type off_type; | |
7d6a0993 | 40 | typedef filebuf::traits_type traits_type; |
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41 | |
42 | bool test = true; | |
43 | streamsize strmsz_1, strmsz_2; | |
44 | streamoff strmof_1, strmof_2; | |
45 | ||
46 | int_type c1; | |
47 | int_type c2; | |
48 | int_type c3; | |
49 | ||
50 | pos_type pt_1(off_type(-1)); | |
51 | pos_type pt_2(off_type(0)); | |
52 | pos_type pt_3; | |
53 | off_type off_1 = 0; | |
54 | off_type off_2 = 0; | |
55 | ||
56 | // seekpos | |
57 | // pubseekpos(pos_type sp, ios_base::openmode) | |
58 | // alters the stream position to sp | |
59 | ||
7d6a0993 | 60 | // in |
ed242935 | 61 | { |
7d6a0993 BK |
62 | constraint_filebuf fb; |
63 | fb.pubsetbuf(0, 0); | |
64 | fb.open(name_01, ios_base::in); | |
65 | VERIFY( fb.unbuffered() ); | |
66 | ||
67 | // beg | |
68 | pt_1 = fb.pubseekoff(78, ios_base::beg); | |
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69 | off_1 = pt_1; |
70 | VERIFY( off_1 > 0 ); | |
7d6a0993 | 71 | c1 = fb.snextc(); //current in pointer +1 |
ed242935 | 72 | VERIFY( c1 == 't' ); |
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73 | |
74 | // cur | |
75 | pt_3 = fb.pubseekoff(0, ios_base::cur); | |
76 | fb.pubseekpos(pt_3); | |
77 | c2 = fb.sputc('\n'); //test current out pointer | |
78 | pt_3 = fb.pubseekoff(0, ios_base::cur); | |
79 | fb.pubseekpos(pt_3); | |
80 | c3 = fb.sgetc(); | |
81 | fb.pubsync(); //resets pointers | |
82 | pt_2 = fb.pubseekpos(pt_1); | |
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83 | off_2 = pt_2; |
84 | VERIFY( off_1 == off_2 ); | |
7d6a0993 BK |
85 | c3 = fb.snextc(); //current in pointer +1 |
86 | VERIFY( c2 == traits_type::eof() ); | |
87 | VERIFY( c2 != c3 ); | |
88 | ||
89 | // end | |
90 | pt_1 = fb.pubseekoff(0, ios_base::end); | |
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91 | off_1 = pt_1; |
92 | VERIFY( off_1 > off_2 ); | |
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93 | fb.sputn("\nof the wonderful things he does!!\nok", 37); |
94 | fb.pubsync(); | |
95 | VERIFY( fb.unbuffered() ); | |
96 | fb.close(); | |
97 | VERIFY( !fb.is_open() ); | |
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98 | } |
99 | } | |
100 | ||
101 | main() | |
102 | { | |
103 | test05(); | |
104 | return 0; | |
105 | } |