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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-1io.tst"; |
ed242935 PC |
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; | |
40 | ||
7d6a0993 | 41 | bool test = true; |
ed242935 PC |
42 | streamsize strmsz_1, strmsz_2; |
43 | streamoff strmof_1, strmof_2; | |
44 | ||
45 | int_type c1; | |
46 | int_type c2; | |
47 | int_type c3; | |
48 | ||
49 | pos_type pt_1(off_type(-1)); | |
50 | pos_type pt_2(off_type(0)); | |
51 | off_type off_1 = 0; | |
52 | off_type off_2 = 0; | |
53 | ||
54 | // seekoff | |
55 | // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which) | |
56 | // alters the stream position to off | |
57 | ||
58 | // in | out | |
59 | { | |
7d6a0993 BK |
60 | constraint_filebuf fb; |
61 | fb.open(name_01, ios_base::out | ios_base::in); | |
62 | VERIFY( !fb.write_position() ); | |
63 | VERIFY( !fb.read_position() ); | |
64 | ||
ed242935 | 65 | //beg |
7d6a0993 BK |
66 | strmsz_1 = fb.in_avail(); |
67 | pt_1 = fb.pubseekoff(2, ios_base::beg); | |
68 | strmsz_2 = fb.in_avail(); | |
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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 == '9' ); |
7d6a0993 BK |
73 | fb.pubseekoff(3, ios_base::beg); |
74 | c2 = fb.sputc('\n'); //current in pointer +1 | |
75 | fb.pubseekoff(4, ios_base::beg); | |
76 | c3 = fb.sgetc(); | |
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77 | VERIFY( c2 != c3 ); |
78 | VERIFY( c3 == '9' ); | |
7d6a0993 BK |
79 | fb.pubsync(); |
80 | c1 = fb.sgetc(); | |
ed242935 | 81 | VERIFY( c1 == c3 ); |
7d6a0993 | 82 | |
ed242935 | 83 | //cur |
7d6a0993 | 84 | pt_2 = fb.pubseekoff(2, ios_base::cur); |
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85 | off_2 = pt_2; |
86 | VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) ); | |
7d6a0993 | 87 | c1 = fb.snextc(); //current in pointer +1 |
ed242935 | 88 | VERIFY( c1 == '1' ); |
7d6a0993 BK |
89 | fb.pubseekoff(0, ios_base::cur); |
90 | c2 = fb.sputc('x'); //test current out pointer | |
91 | c3 = fb.sputc('\n'); | |
92 | fb.pubseekoff(0, ios_base::cur); | |
93 | c1 = fb.sgetc(); | |
94 | fb.pubsync(); | |
95 | c3 = fb.sgetc(); | |
ed242935 | 96 | VERIFY( c1 == c3 ); |
7d6a0993 | 97 | |
ed242935 | 98 | //end |
7d6a0993 | 99 | pt_2 = fb.pubseekoff(0, ios_base::end); |
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100 | off_1 = pt_2; |
101 | VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends | |
7d6a0993 BK |
102 | c3 = fb.sputc('\n'); |
103 | strmsz_1 = fb.sputn("because because because. . .", 28); | |
ed242935 | 104 | VERIFY( strmsz_1 == 28 ); |
7d6a0993 BK |
105 | fb.pubseekoff(-1, ios_base::end); |
106 | fb.sgetc(); | |
107 | c1 = fb.sungetc(); | |
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108 | // Defect? retval of sungetc is not necessarily the character ungotten. |
109 | // So re-get it. | |
7d6a0993 BK |
110 | c1 = fb.sgetc(); |
111 | fb.pubsync(); | |
112 | c3 = fb.sgetc(); | |
ed242935 | 113 | VERIFY( c1 == c3 ); |
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114 | VERIFY( !fb.write_position() ); |
115 | VERIFY( fb.read_position() ); | |
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116 | } |
117 | } | |
118 | ||
119 | main() | |
120 | { | |
121 | test05(); | |
122 | return 0; | |
123 | } |