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83ffe9cd | 1 | // Copyright (C) 2004-2023 Free Software Foundation, Inc. |
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2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
748086b7 | 6 | // Free Software Foundation; either version 3, or (at your option) |
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7 | // any later version. |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
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15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
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17 | |
18 | // 27.6.1.3 unformatted input functions | |
19 | // NB: ostream has a particular "seeks" category. Adopt this for istreams too. | |
20 | // @require@ %-*.tst %-*.txt | |
21 | // @diff@ %-*.tst %-*.txt | |
22 | ||
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23 | // { dg-require-fileio "" } |
24 | ||
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25 | #include <istream> |
26 | #include <sstream> | |
27 | #include <fstream> | |
28 | #include <testsuite_hooks.h> | |
29 | ||
30 | // stringstreams | |
31 | void test05(void) | |
32 | { | |
33 | typedef std::wistream::off_type off_type; | |
34 | ||
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35 | std::wistream::pos_type pos01, pos02, pos03, pos04, pos05, pos06; |
36 | std::ios_base::iostate state01, state02; | |
37 | const char str_lit01[] = "wistream_seeks-1.tst"; | |
38 | std::wifstream if01(str_lit01); | |
39 | std::wifstream if02(str_lit01); | |
40 | std::wifstream if03(str_lit01); | |
41 | VERIFY( if01.good() ); | |
42 | VERIFY( if02.good() ); | |
43 | VERIFY( if03.good() ); | |
44 | ||
45 | std::wstringbuf strbuf01(std::ios_base::in | std::ios_base::out); | |
46 | if01 >> &strbuf01; | |
47 | // initialize stringbufs that are ios_base::out | |
48 | std::wstringbuf strbuf03(strbuf01.str(), std::ios_base::out); | |
49 | // initialize stringbufs that are ios_base::in | |
50 | std::wstringbuf strbuf02(strbuf01.str(), std::ios_base::in); | |
51 | ||
52 | std::wistream is01(&strbuf01); | |
53 | std::wistream is02(&strbuf02); | |
54 | std::wistream is03(&strbuf03); | |
55 | ||
56 | // pos_type tellg() | |
57 | // in | out | |
58 | pos01 = is01.tellg(); | |
59 | pos02 = is01.tellg(); | |
60 | VERIFY( pos01 == pos02 ); | |
61 | ||
62 | // in | |
63 | pos03 = is02.tellg(); | |
64 | pos04 = is02.tellg(); | |
65 | VERIFY( pos03 == pos04 ); | |
66 | ||
67 | // out | |
68 | pos05 = is03.tellg(); | |
69 | pos06 = is03.tellg(); | |
70 | VERIFY( pos05 == pos06 ); | |
71 | ||
72 | // cur | |
73 | // NB: see library issues list 136. It's the v-3 interp that seekg | |
74 | // only sets the input buffer, or else istreams with buffers that | |
75 | // have _M_mode == ios_base::out will fail to have consistency | |
76 | // between seekg and tellg. | |
77 | state01 = is01.rdstate(); | |
78 | is01.seekg(10, std::ios_base::cur); | |
79 | state02 = is01.rdstate(); | |
80 | pos01 = is01.tellg(); | |
81 | VERIFY( pos01 == pos02 + off_type(10) ); | |
82 | VERIFY( state01 == state02 ); | |
83 | pos02 = is01.tellg(); | |
84 | VERIFY( pos02 == pos01 ); | |
85 | } | |
86 | ||
87 | int main() | |
88 | { | |
89 | test05(); | |
90 | return 0; | |
91 | } |