1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
// Copyright (C) 2003-2015 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 27.8.1.4 Overridden virtual functions
#include <fstream>
#include <locale>
#include <cstdio>
#include <testsuite_hooks.h>
template <typename InternT, typename StateT = mbstate_t>
class checksumcvt : public std::codecvt<InternT, char, StateT>
{
typedef std::codecvt<InternT, char, StateT> Base;
static const size_t width = sizeof(InternT) + 1;
public:
typedef InternT intern_type;
typedef char extern_type;
explicit checksumcvt(size_t refs = 0)
: Base(refs)
{ }
protected:
virtual typename std::codecvt<InternT, char, StateT>::result
do_out(StateT&, const intern_type* from,
const intern_type* from_end, const intern_type*& from_next,
extern_type* to, extern_type* to_end,
extern_type*& to_next) const
{
size_t len = std::min(static_cast<size_t>(from_end - from),
static_cast<size_t>(to_end - to) / width);
while (len--)
{
const char* p = reinterpret_cast<const char*>(from);
unsigned char checksum = 0;
for (size_t i = 0; i < sizeof(intern_type); ++i)
{
*to++ = p[i];
checksum ^= static_cast<unsigned char>(p[i]);
}
*to++ = checksum;
++from;
}
from_next = from;
to_next = to;
return from_next == from_end ? std::codecvt<InternT, char, StateT>::ok
: std::codecvt<InternT, char, StateT>::partial;
}
virtual typename std::codecvt<InternT, char, StateT>::result
do_unshift(StateT&, extern_type* to,
extern_type*, extern_type*& to_next) const
{
to_next = to;
return std::codecvt<InternT, char, StateT>::ok;
}
virtual typename std::codecvt<InternT, char, StateT>::result
do_in(StateT&, const extern_type* from,
const extern_type* from_end, const extern_type*& from_next,
intern_type* to, intern_type* to_end,
intern_type*& to_next) const
{
size_t len = std::min(static_cast<size_t>(to_end - to),
static_cast<size_t>(from_end - from) / width);
while (len)
{
const char* f = from;
intern_type tmp;
char* p = reinterpret_cast<char*>(&tmp);
unsigned char checksum = 0;
for (size_t i = 0; i < sizeof(intern_type); ++i)
{
p[i] = *f;
checksum ^= static_cast<unsigned char>(*f++);
}
if (*f++ != checksum)
break;
from = f;
*to++ = tmp;
len--;
}
from_next = from;
to_next = to;
return len ? std::codecvt<InternT, char, StateT>::error :
(from_next == from_end ? std::codecvt<InternT, char, StateT>::ok
: std::codecvt<InternT, char, StateT>::partial);
}
virtual int
do_encoding() const throw()
{ return width; }
virtual int
do_length(StateT&, const extern_type* from,
const extern_type* end, size_t max) const
{
size_t len = std::min(max, static_cast<size_t>(end - from) / width);
int ret = 0;
while (len--)
{
unsigned char checksum = 0;
for (size_t i = 0; i < sizeof(intern_type); ++i)
{
checksum ^= static_cast<unsigned char>(*from++);
}
if (*from++ != checksum)
break;
ret++;
}
return ret;
}
virtual int
do_max_length() const throw()
{ return width; }
virtual bool
do_always_noconv() const throw()
{ return false; }
};
// libstdc++/11544 (invalid byte sequence in file)
void test02()
{
using namespace std;
bool test __attribute__((unused)) = true;
locale loc(locale::classic(), new checksumcvt<wchar_t>);
const char* name = "tmp_11544-2";
FILE* f = fopen(name, "w");
VERIFY( fwrite("aaaab", 1, 5, f) == 5 );
fclose(f);
wifstream in;
in.imbue(loc);
in.open(name);
VERIFY( in.good() );
in.get();
VERIFY( !in.good() );
VERIFY( in.bad() );
VERIFY( !in.eof() );
in.close();
}
int main()
{
test02();
return 0;
}
|
