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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
// **************************************************************************
#ifndef SERIALIZE_H_INCLUDED
#define SERIALIZE_H_INCLUDED
#include <cstdint>
#include <wx/stream.h>
#include <zen/file_io.h>
namespace zen
{
//unchecked, unformatted serialization
template <class T> T readPOD (wxInputStream& stream);
template <class T> void writePOD(wxOutputStream& stream, const T& pod);
template <class S> S readString (wxInputStream& stream);
template <class S> void writeString(wxOutputStream& stream, const S& str);
//############# wxWidgets stream adapter #############
class FileInputStream : public wxInputStream
{
public:
FileInputStream(const Zstring& filename) : fileObj(filename) {} //throw FileError
private:
virtual size_t OnSysRead(void* buffer, size_t bufsize) { return fileObj.read(buffer, bufsize); } //throw FileError
zen::FileInput fileObj;
};
class FileOutputStream : public wxOutputStream
{
public:
FileOutputStream(const Zstring& filename) : fileObj(filename, zen::FileOutput::ACC_OVERWRITE) {} //throw FileError
private:
virtual size_t OnSysWrite(const void* buffer, size_t bufsize)
{
fileObj.write(buffer, bufsize); //throw FileError
return bufsize;
}
zen::FileOutput fileObj;
};
//wxInputStream proxy throwing FileError on error
class CheckedReader
{
public:
CheckedReader(wxInputStream& stream, const Zstring& errorObjName) : stream_(stream), errorObjName_(errorObjName) {}
template <class T>
T readNumberC() const; //throw FileError, checked read operation
template <class S>
S readStringC() const; //throw FileError, checked read operation
private:
void check() const;
wxInputStream& stream_;
const Zstring& errorObjName_; //used for error text only
};
//wxOutputStream proxy throwing FileError on error
class CheckedWriter
{
public:
CheckedWriter(wxOutputStream& stream, const Zstring& errorObjName) : stream_(stream), errorObjName_(errorObjName) {}
template <class T>
void writeNumberC(T number) const; //throw FileError, checked write operation
template <class S>
void writeStringC(const S& str) const; //throw FileError, checked write operation
private:
void check() const;
wxOutputStream& stream_;
const Zstring& errorObjName_; //used for error text only!
};
//-----------------------implementation-------------------------------
template <class T> inline
T readPOD(wxInputStream& stream)
{
T pod = 0;
stream.Read(reinterpret_cast<char*>(&pod), sizeof(T));
return pod;
}
template <class T> inline
void writePOD(wxOutputStream& stream, const T& pod)
{
stream.Write(reinterpret_cast<const char*>(&pod), sizeof(T));
}
template <class S> inline
S readString(wxInputStream& stream)
{
//don't even consider UTF8 conversions here! "string" is expected to handle arbitrary binary data!
typedef typename S::value_type CharType;
const auto strLength = readPOD<std::uint32_t>(stream);
S output;
output.resize(strLength); //throw std::bad_alloc
stream.Read(&*output.begin(), sizeof(CharType) * strLength);
return output;
}
template <class S> inline
void writeString(wxOutputStream& stream, const S& str)
{
writePOD(stream, static_cast<std::uint32_t>(str.length()));
stream.Write(str.c_str(), sizeof(typename S::value_type) * str.length());
}
inline
void CheckedReader::check() const
{
if (stream_.GetLastError() != wxSTREAM_NO_ERROR)
throw zen::FileError(_("Error reading from synchronization database:") + L" \n" + L"\"" + errorObjName_ + L"\"");
}
template <class T>
inline
T CheckedReader::readNumberC() const //checked read operation
{
T output = readPOD<T>(stream_);
check();
return output;
}
template <class S> inline
S CheckedReader::readStringC() const //checked read operation
{
S output;
try
{
output = readString<S>(stream_); //throw std::bad_alloc
check();
if (stream_.LastRead() != output.length() * sizeof(typename S::value_type)) //some additional check
throw FileError(_("Error reading from synchronization database:") + L" \n" + L"\"" + errorObjName_ + L"\"");
}
catch (std::exception&)
{
throw FileError(_("Error reading from synchronization database:") + L" \n" + L"\"" + errorObjName_ + L"\"");
}
return output;
}
template <class T> inline
void CheckedWriter::writeNumberC(T number) const //checked write operation
{
writePOD<T>(stream_, number);
check();
}
template <class S> inline
void CheckedWriter::writeStringC(const S& str) const //checked write operation
{
writeString(stream_, str);
check();
if (stream_.LastWrite() != str.length() * sizeof(typename S::value_type)) //some additional check
throw FileError(_("Error writing to synchronization database:") + L" \n" + L"\"" + errorObjName_ + L"\"");
}
inline
void CheckedWriter::check() const
{
if (stream_.GetLastError() != wxSTREAM_NO_ERROR)
throw FileError(_("Error writing to synchronization database:") + L" \n" + L"\"" + errorObjName_ + L"\"");
}
}
#endif //SERIALIZE_H_INCLUDED
|
