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1 | // Copyright (C) 2004 Free Software Foundation |
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 | |
6 | // Free Software Foundation; either version 2, or (at your option) | |
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 | |
15 | // with this library; see the file COPYING. If not, write to the Free | |
16 | // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
17 | // USA. | |
18 | ||
19 | // 27.6.1.3 unformatted input functions | |
20 | // NB: ostream has a particular "seeks" category. Adopt this for istreams too. | |
21 | // @require@ %-*.tst %-*.txt | |
22 | // @diff@ %-*.tst %-*.txt | |
23 | ||
24 | #include <istream> | |
25 | #include <sstream> | |
26 | #include <fstream> | |
27 | #include <testsuite_hooks.h> | |
28 | ||
29 | // fstreams | |
30 | void test04(void) | |
31 | { | |
32 | typedef std::wistream::off_type off_type; | |
33 | ||
34 | bool test __attribute__((unused)) = true; | |
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.txt"; | |
38 | const char str_lit02[] = "wistream_seeks-2.txt"; | |
39 | std::wifstream if01(str_lit01, std::ios_base::in | std::ios_base::out); | |
40 | std::wifstream if02(str_lit01, std::ios_base::in); | |
41 | std::wifstream if03(str_lit02, std::ios_base::out | std::ios_base::trunc); | |
42 | VERIFY( if01.good() ); | |
43 | VERIFY( if02.good() ); | |
44 | VERIFY( if03.good() ); | |
45 | ||
46 | std::wistream is01(if01.rdbuf()); | |
47 | std::wistream is02(if02.rdbuf()); | |
48 | std::wistream is03(if03.rdbuf()); | |
49 | ||
50 | // pos_type tellg() | |
51 | // in | out | |
52 | pos01 = is01.tellg(); | |
53 | pos02 = is01.tellg(); | |
54 | VERIFY( pos01 == pos02 ); | |
55 | ||
56 | // in | |
57 | pos03 = is02.tellg(); | |
58 | pos04 = is02.tellg(); | |
59 | VERIFY( pos03 == pos04 ); | |
60 | ||
61 | // out | |
62 | pos05 = is03.tellg(); | |
63 | pos06 = is03.tellg(); | |
64 | VERIFY( pos05 == pos06 ); | |
65 | ||
66 | // cur | |
67 | // NB: see library issues list 136. It's the v-3 interp that seekg | |
68 | // only sets the input buffer, or else istreams with buffers that | |
69 | // have _M_mode == ios_base::out will fail to have consistency | |
70 | // between seekg and tellg. | |
71 | state01 = is01.rdstate(); | |
72 | is01.seekg(10, std::ios_base::cur); | |
73 | state02 = is01.rdstate(); | |
74 | pos01 = is01.tellg(); | |
75 | VERIFY( pos01 == pos02 + off_type(10) ); | |
76 | VERIFY( state01 == state02 ); | |
77 | pos02 = is01.tellg(); | |
78 | VERIFY( pos02 == pos01 ); | |
79 | } | |
80 | ||
81 | int main() | |
82 | { | |
83 | test04(); | |
84 | return 0; | |
85 | } |