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a945c346 | 1 | // Copyright (C) 2003-2024 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 | // 27.8.1.4 Overridden virtual functions | |
19 | ||
20 | #include <fstream> | |
21 | #include <locale> | |
22 | #include <algorithm> | |
23 | #include <cstring> | |
24 | #include <testsuite_hooks.h> | |
25 | ||
26 | class Cvt : public std::codecvt<wchar_t, char, mbstate_t> | |
27 | { | |
28 | protected: | |
29 | virtual std::codecvt_base::result | |
30 | do_out(std::mbstate_t&, const wchar_t* from, const wchar_t* from_end, | |
31 | const wchar_t*& from_next, char* to, char* to_end, | |
32 | char*& to_next) const | |
33 | { | |
34 | std::size_t from_len = from_end - from; | |
35 | std::size_t to_len = (to_end - to) / sizeof(wchar_t); | |
36 | std::size_t len = std::min(from_len, to_len); | |
37 | std::memcpy(to, from, len * sizeof(wchar_t)); | |
38 | from_next = from + len; | |
39 | to_next = to + len * sizeof(wchar_t); | |
40 | return from_next == from_end ? std::codecvt_base::ok : | |
41 | std::codecvt_base::partial; | |
42 | } | |
43 | ||
44 | virtual std::codecvt_base::result | |
45 | do_in(std::mbstate_t&, const char* from, const char* from_end, | |
46 | const char*& from_next, wchar_t* to, wchar_t* to_end, | |
47 | wchar_t*& to_next) const | |
48 | { | |
49 | std::size_t from_len = | |
50 | (from_end - from) / sizeof(wchar_t); | |
51 | std::size_t to_len = to_end - to; | |
52 | std::size_t len = std::min(from_len, to_len); | |
53 | std::memcpy(to, from, len * sizeof(wchar_t)); | |
54 | from_next = from + len * sizeof(wchar_t); | |
55 | to_next = to + len; | |
56 | return from_next == from_end ? std::codecvt_base::ok : | |
57 | std::codecvt_base::partial; | |
58 | } | |
59 | ||
60 | virtual std::codecvt_base::result | |
61 | do_unshift(std::mbstate_t&, char*, char*, char*&) const | |
62 | { return std::codecvt_base::noconv; } | |
63 | ||
64 | virtual int do_encoding() const throw() { return sizeof(wchar_t); } | |
65 | virtual bool do_always_noconv() const throw() { return false; } | |
66 | ||
67 | virtual int | |
68 | do_length(std::mbstate_t&, const char* from, const char* end, | |
69 | std::size_t max) | |
70 | { | |
71 | std::size_t len = (end - from) / sizeof(wchar_t); | |
72 | return std::min(len, max) * sizeof(wchar_t); | |
73 | } | |
74 | ||
75 | virtual int do_max_length() const throw() { return sizeof(wchar_t); } | |
76 | }; | |
77 | ||
78 | void test01() | |
79 | { | |
80 | using namespace std; | |
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81 | |
82 | // seekpos | |
83 | wfilebuf fb; | |
84 | fb.pubimbue(locale(locale::classic(), new Cvt)); | |
85 | fb.open("tmp_9875_seekpos", ios_base::out | ios_base::in | ios_base::trunc); | |
86 | fb.sputn(L"0123456789", 10); | |
87 | ||
88 | streampos p1 = fb.pubseekoff(0, ios_base::cur); | |
89 | VERIFY( p1 != streampos(-1) ); | |
90 | fb.sputc(L'a'); | |
91 | ||
92 | streampos p2 = fb.pubseekpos(p1); | |
93 | VERIFY( p2 != streampos(-1) ); | |
94 | VERIFY( p2 == p1 ); | |
95 | VERIFY( fb.sgetc() == L'a' ); | |
96 | ||
97 | fb.pubseekoff(0, ios_base::beg); | |
98 | wchar_t buf[11]; | |
99 | streamsize s1 = fb.sgetn(buf, 11); | |
100 | VERIFY( s1 == 11 ); | |
101 | VERIFY( !wmemcmp(buf, L"0123456789a", 11) ); | |
102 | ||
103 | fb.close(); | |
104 | } | |
105 | ||
106 | int main() | |
107 | { | |
108 | test01(); | |
109 | return 0; | |
110 | } |