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9fe93909 | 1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
2 | ||
f1717362 | 3 | // Copyright (C) 2001-2016 Free Software Foundation, Inc. |
9fe93909 | 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 | |
6bc9506f | 8 | // Free Software Foundation; either version 3, or (at your option) |
9fe93909 | 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 | |
6bc9506f | 17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
9fe93909 | 19 | |
20 | // 27.8.1.4 Overridden virtual functions | |
21 | ||
b14642ed | 22 | // { dg-require-fileio "" } |
23 | ||
9fe93909 | 24 | #include <fstream> |
25 | #include <testsuite_hooks.h> | |
26 | #include <testsuite_io.h> | |
27 | ||
28 | // @require@ %-*.tst %-*.txt | |
29 | // @diff@ %-*.tst %*.txt | |
30 | ||
3bc1684c | 31 | const char name_01[] = "seekoff.txt"; |
9fe93909 | 32 | |
33 | void test05() | |
34 | { | |
35 | using namespace std; | |
56dcf3cc | 36 | using namespace __gnu_test; |
9fe93909 | 37 | |
38 | typedef filebuf::int_type int_type; | |
39 | typedef filebuf::pos_type pos_type; | |
40 | typedef filebuf::off_type off_type; | |
3bc1684c | 41 | typedef filebuf::traits_type traits_type; |
9fe93909 | 42 | |
f8ef786c | 43 | bool test __attribute__((unused)) = true; |
1c78c762 | 44 | streamsize strmsz_1; |
9fe93909 | 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 | ||
3bc1684c | 59 | // in |
9fe93909 | 60 | { |
3bc1684c | 61 | constraint_filebuf fb; |
62 | fb.pubsetbuf(0, 0); | |
63 | fb.open(name_01, ios_base::in); | |
64 | VERIFY( fb.unbuffered() ); | |
65 | ||
9fe93909 | 66 | //beg |
3bc1684c | 67 | strmsz_1 = fb.in_avail(); |
68 | pt_1 = fb.pubseekoff(2, ios_base::beg); | |
1c78c762 | 69 | fb.in_avail(); |
b812c14e | 70 | off_1 = off_type(pt_1); |
9fe93909 | 71 | VERIFY( off_1 > 0 ); |
3bc1684c | 72 | c1 = fb.snextc(); //current in pointer +1 |
9fe93909 | 73 | VERIFY( c1 == '9' ); |
3bc1684c | 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(); | |
78 | VERIFY( c2 == traits_type::eof() ); | |
9fe93909 | 79 | VERIFY( c3 == '9' ); |
3bc1684c | 80 | fb.pubsync(); |
81 | c1 = fb.sgetc(); | |
9fe93909 | 82 | VERIFY( c1 == c3 ); |
3bc1684c | 83 | |
9fe93909 | 84 | //cur |
3bc1684c | 85 | pt_2 = fb.pubseekoff(2, ios_base::cur); |
b812c14e | 86 | off_2 = off_type(pt_2); |
9fe93909 | 87 | VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) ); |
3bc1684c | 88 | c1 = fb.snextc(); //current in pointer +1 |
9fe93909 | 89 | VERIFY( c1 == '1' ); |
3bc1684c | 90 | fb.pubseekoff(0, ios_base::cur); |
91 | c2 = fb.sputc('x'); //test current out pointer | |
92 | c3 = fb.sputc('\n'); | |
93 | VERIFY( c2 == traits_type::eof() ); | |
94 | VERIFY( c3 == traits_type::eof() ); | |
95 | fb.pubseekoff(0, ios_base::cur); | |
96 | c1 = fb.sgetc(); | |
97 | fb.pubsync(); | |
98 | c3 = fb.sgetc(); | |
9fe93909 | 99 | VERIFY( c1 == c3 ); |
3bc1684c | 100 | |
9fe93909 | 101 | //end |
3bc1684c | 102 | pt_2 = fb.pubseekoff(0, ios_base::end); |
b812c14e | 103 | off_1 = off_type(pt_2); |
9fe93909 | 104 | VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends |
3bc1684c | 105 | c3 = fb.sputc('\n'); |
106 | strmsz_1 = fb.sputn("because because because. . .", 28); | |
107 | VERIFY( strmsz_1 == 0 ); | |
108 | fb.pubseekoff(-1, ios_base::end); | |
109 | fb.sgetc(); | |
110 | c1 = fb.sungetc(); | |
9fe93909 | 111 | // Defect? retval of sungetc is not necessarily the character ungotten. |
112 | // So re-get it. | |
3bc1684c | 113 | c1 = fb.sgetc(); |
114 | fb.pubsync(); | |
115 | c3 = fb.sgetc(); | |
9fe93909 | 116 | VERIFY( c1 == c3 ); |
3bc1684c | 117 | VERIFY( fb.unbuffered() ); |
9fe93909 | 118 | } |
119 | } | |
120 | ||
f8ef786c | 121 | int main() |
9fe93909 | 122 | { |
123 | test05(); | |
124 | return 0; | |
125 | } |