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ed242935 PC |
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[] = "seekoff-1out.tst"; |
ed242935 PC |
31 | |
32 | void test05() | |
33 | { | |
34 | using namespace std; | |
aecf642c | 35 | using namespace __gnu_test; |
ed242935 PC |
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; |
ed242935 | 41 | |
7d6a0993 | 42 | bool test = true; |
ed242935 PC |
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 | off_type off_1 = 0; | |
53 | off_type off_2 = 0; | |
54 | ||
55 | // seekoff | |
56 | // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which) | |
57 | // alters the stream position to off | |
58 | ||
7d6a0993 | 59 | // out |
ed242935 | 60 | { |
7d6a0993 BK |
61 | constraint_filebuf fb; |
62 | fb.open(name_01, ios_base::out); | |
63 | VERIFY( !fb.write_position() ); | |
64 | VERIFY( !fb.read_position() ); | |
65 | ||
ed242935 | 66 | //beg |
7d6a0993 BK |
67 | strmsz_1 = fb.in_avail(); |
68 | pt_1 = fb.pubseekoff(2, ios_base::beg); | |
69 | strmsz_2 = fb.in_avail(); | |
ed242935 PC |
70 | off_1 = pt_1; |
71 | VERIFY( off_1 > 0 ); | |
7d6a0993 BK |
72 | c1 = fb.snextc(); //current in pointer +1 |
73 | VERIFY( c1 == traits_type::eof() ); | |
74 | fb.pubseekoff(3, ios_base::beg); | |
75 | c2 = fb.sputc('\n'); //current in pointer +1 | |
76 | fb.pubseekoff(4, ios_base::beg); | |
77 | c3 = fb.sgetc(); | |
ed242935 | 78 | VERIFY( c2 != c3 ); |
7d6a0993 BK |
79 | VERIFY( c3 == traits_type::eof() ); |
80 | fb.pubsync(); | |
81 | c1 = fb.sgetc(); | |
ed242935 | 82 | VERIFY( c1 == c3 ); |
7d6a0993 | 83 | |
ed242935 | 84 | //cur |
7d6a0993 | 85 | pt_2 = fb.pubseekoff(2, ios_base::cur); |
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86 | off_2 = pt_2; |
87 | VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) ); | |
7d6a0993 BK |
88 | c1 = fb.snextc(); //current in pointer +1 |
89 | VERIFY( c1 == traits_type::eof() ); | |
90 | fb.pubseekoff(0, ios_base::cur); | |
91 | c2 = fb.sputc('x'); //test current out pointer | |
92 | c3 = fb.sputc('\n'); | |
93 | fb.pubseekoff(0, ios_base::cur); | |
94 | c1 = fb.sgetc(); | |
95 | fb.pubsync(); | |
96 | c3 = fb.sgetc(); | |
ed242935 | 97 | VERIFY( c1 == c3 ); |
7d6a0993 | 98 | |
ed242935 | 99 | //end |
7d6a0993 | 100 | pt_2 = fb.pubseekoff(0, ios_base::end); |
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101 | off_1 = pt_2; |
102 | VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends | |
7d6a0993 BK |
103 | c3 = fb.sputc('\n'); |
104 | strmsz_1 = fb.sputn("because because because. . .", 28); | |
ed242935 | 105 | VERIFY( strmsz_1 == 28 ); |
7d6a0993 BK |
106 | fb.pubseekoff(-1, ios_base::end); |
107 | fb.sgetc(); | |
108 | c1 = fb.sungetc(); | |
ed242935 PC |
109 | // Defect? retval of sungetc is not necessarily the character ungotten. |
110 | // So re-get it. | |
7d6a0993 BK |
111 | c1 = fb.sgetc(); |
112 | fb.pubsync(); | |
113 | c3 = fb.sgetc(); | |
ed242935 | 114 | VERIFY( c1 == c3 ); |
7d6a0993 BK |
115 | VERIFY( !fb.write_position() ); |
116 | VERIFY( !fb.read_position() ); | |
ed242935 PC |
117 | } |
118 | } | |
119 | ||
120 | main() | |
121 | { | |
122 | test05(); | |
123 | return 0; | |
124 | } |