]>
Commit | Line | Data |
---|---|---|
5624e564 | 1 | // Copyright (C) 2003-2015 Free Software Foundation, Inc. |
3461133d PC |
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) |
3461133d PC |
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 | |
748086b7 JJ |
15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
3461133d PC |
17 | |
18 | // 27.8.1.4 Overridden virtual functions | |
19 | ||
20 | #include <fstream> | |
21 | #include <string> | |
22 | #include <iterator> | |
23 | #include <algorithm> | |
24 | #include <locale> | |
25 | #include <testsuite_hooks.h> | |
26 | ||
27 | template <typename InternT, typename StateT = mbstate_t> | |
28 | class checksumcvt : public std::codecvt<InternT, char, StateT> | |
29 | { | |
30 | typedef std::codecvt<InternT, char, StateT> Base; | |
31 | static const size_t width = sizeof(InternT) + 1; | |
32 | ||
33 | public: | |
34 | typedef InternT intern_type; | |
35 | typedef char extern_type; | |
36 | ||
37 | explicit checksumcvt(size_t refs = 0) | |
38 | : Base(refs) | |
39 | { } | |
40 | ||
41 | protected: | |
42 | virtual typename std::codecvt<InternT, char, StateT>::result | |
43 | do_out(StateT&, const intern_type* from, | |
44 | const intern_type* from_end, const intern_type*& from_next, | |
45 | extern_type* to, extern_type* to_end, | |
46 | extern_type*& to_next) const | |
47 | { | |
48 | size_t len = std::min(static_cast<size_t>(from_end - from), | |
49 | static_cast<size_t>(to_end - to) / width); | |
50 | ||
51 | while (len--) | |
52 | { | |
53 | const char* p = reinterpret_cast<const char*>(from); | |
54 | unsigned char checksum = 0; | |
55 | ||
56 | for (size_t i = 0; i < sizeof(intern_type); ++i) | |
57 | { | |
58 | *to++ = p[i]; | |
59 | checksum ^= static_cast<unsigned char>(p[i]); | |
60 | } | |
61 | ||
62 | *to++ = checksum; | |
63 | ++from; | |
64 | } | |
65 | ||
66 | from_next = from; | |
67 | to_next = to; | |
68 | return from_next == from_end ? std::codecvt<InternT, char, StateT>::ok | |
69 | : std::codecvt<InternT, char, StateT>::partial; | |
70 | } | |
71 | ||
72 | virtual typename std::codecvt<InternT, char, StateT>::result | |
73 | do_unshift(StateT&, extern_type* to, | |
74 | extern_type*, extern_type*& to_next) const | |
75 | { | |
76 | to_next = to; | |
77 | return std::codecvt<InternT, char, StateT>::ok; | |
78 | } | |
79 | ||
80 | virtual typename std::codecvt<InternT, char, StateT>::result | |
81 | do_in(StateT&, const extern_type* from, | |
82 | const extern_type* from_end, const extern_type*& from_next, | |
83 | intern_type* to, intern_type* to_end, | |
84 | intern_type*& to_next) const | |
85 | { | |
86 | size_t len = std::min(static_cast<size_t>(to_end - to), | |
87 | static_cast<size_t>(from_end - from) / width); | |
88 | ||
89 | while (len) | |
90 | { | |
91 | const char* f = from; | |
92 | intern_type tmp; | |
93 | char* p = reinterpret_cast<char*>(&tmp); | |
94 | unsigned char checksum = 0; | |
95 | ||
96 | for (size_t i = 0; i < sizeof(intern_type); ++i) | |
97 | { | |
98 | p[i] = *f; | |
99 | checksum ^= static_cast<unsigned char>(*f++); | |
100 | } | |
101 | ||
102 | if (*f++ != checksum) | |
103 | break; | |
104 | ||
105 | from = f; | |
106 | *to++ = tmp; | |
107 | len--; | |
108 | } | |
109 | ||
110 | from_next = from; | |
111 | to_next = to; | |
112 | return len ? std::codecvt<InternT, char, StateT>::error : | |
113 | (from_next == from_end ? std::codecvt<InternT, char, StateT>::ok | |
114 | : std::codecvt<InternT, char, StateT>::partial); | |
115 | } | |
116 | ||
117 | virtual int | |
118 | do_encoding() const throw() | |
119 | { | |
120 | return width; | |
121 | } | |
122 | ||
123 | virtual int | |
124 | do_length(StateT&, const extern_type* from, | |
125 | const extern_type* end, size_t max) const | |
126 | { | |
127 | size_t len = std::min(max, static_cast<size_t>(end - from) / width); | |
128 | ||
129 | int ret = 0; | |
130 | while (len--) | |
131 | { | |
132 | unsigned char checksum = 0; | |
133 | ||
134 | for (size_t i = 0; i < sizeof(intern_type); ++i) | |
135 | { | |
136 | checksum ^= static_cast<unsigned char>(*from++); | |
137 | } | |
138 | ||
139 | if (*from++ != checksum) | |
140 | break; | |
141 | ||
142 | ret++; | |
143 | } | |
144 | ||
145 | return ret; | |
146 | } | |
147 | ||
148 | virtual int | |
149 | do_max_length() const throw() | |
150 | { | |
151 | return width; | |
152 | } | |
153 | ||
154 | virtual bool | |
155 | do_always_noconv() const throw() | |
156 | { | |
157 | return false; | |
158 | } | |
159 | }; | |
160 | ||
161 | void test01() | |
162 | { | |
163 | using namespace std; | |
11f10e6b | 164 | bool test __attribute__((unused)) = true; |
3461133d PC |
165 | |
166 | locale loc; | |
167 | loc = locale(loc, new checksumcvt<wchar_t>); | |
168 | ||
169 | wfilebuf fbuf1; | |
170 | fbuf1.pubimbue(loc); | |
171 | fbuf1.open("tmp_9178", ios_base::out | ios_base::trunc); | |
172 | ||
173 | string tmpstr = "abcdefghijklmnopqrstuvwxyz0123456789 \t\n"; | |
174 | ||
175 | wifstream stream; | |
176 | wstring str1; | |
177 | ||
178 | while (str1.length() < 20000) | |
179 | { | |
180 | transform(tmpstr.begin(), tmpstr.end(), | |
181 | back_inserter(str1), | |
182 | bind1st(std::mem_fun(&std::wios::widen), &stream)); | |
183 | } | |
184 | ||
185 | fbuf1.sputn(str1.data(), str1.size()); | |
186 | fbuf1.close(); | |
187 | ||
188 | wfilebuf fbuf2; | |
189 | fbuf2.pubimbue(loc); | |
190 | fbuf2.open("tmp_9178", std::ios_base::in); | |
191 | ||
192 | wstring str2; | |
193 | copy(istreambuf_iterator<wchar_t>(&fbuf2), | |
194 | istreambuf_iterator<wchar_t>(), | |
195 | back_inserter(str2)); | |
196 | ||
197 | VERIFY( str1 == str2 ); | |
198 | } | |
199 | ||
200 | int main() | |
201 | { | |
202 | test01(); | |
203 | return 0; | |
204 | } |