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
|
#ifndef INCLUDED_BOBCAT_MULTISTREAMBUF_
#define INCLUDED_BOBCAT_MULTISTREAMBUF_
#include <cstdio>
#include <streambuf>
#include <vector>
#include <ostream>
#include <string>
namespace FBB
{
class MultiStreambuf: public std::streambuf
{
public:
enum Mode
{
OFF, // stream not used
ON, // stream always used
ONCE, // stream used until flushed
RESET, // stream once used. Set to ONCE to re-use
};
class stream // holds a pointer to a stream and a indicator
{ // telling us whether or not to use the stream
friend class MultiStreambuf;
std::ostream *d_os;
Mode d_mode;
public:
stream(std::ostream &os, Mode mode = ON);
void setMode(Mode mode);
Mode mode() const;
std::ostream &ostream();
private:
static void setOnce(stream &os);
};
typedef std::vector<stream>::iterator iterator;
typedef std::vector<stream>::const_iterator const_iterator;
private:
std::string d_buffer;
std::vector<stream> d_os;
public:
MultiStreambuf() = default;
explicit MultiStreambuf(std::ostream &os, Mode mode = ON);
explicit MultiStreambuf(std::vector<stream> const &osvector);
void insert(std::ostream &os, Mode mode = ON);
void insert(std::vector<stream> const &os);
iterator begin();
iterator end();
const_iterator begin() const;
const_iterator end() const;
void setOnce(); // reset all `RESET' modes to `ONCE'
protected:
virtual int overflow(int c);
virtual std::streamsize xsputn(char const *buffer, std::streamsize n);
virtual int sync();
private:
struct Insert
{
std::string &buffer;
bool ok;
};
static void insert(stream &os, Insert &insert);
};
inline MultiStreambuf::stream::stream(std::ostream &os, Mode mode)
:
d_os(&os),
d_mode(mode)
{}
inline void MultiStreambuf::stream::setMode(Mode mode)
{
d_mode = mode;
}
inline MultiStreambuf::Mode MultiStreambuf::stream::mode() const
{
return d_mode;
}
inline std::ostream &MultiStreambuf::stream::ostream()
{
return *d_os;
}
inline void MultiStreambuf::stream::setOnce(stream &os)
{
if (os.d_mode == RESET)
os.d_mode = ONCE;
}
inline MultiStreambuf::MultiStreambuf(std::ostream &os, Mode mode)
{
insert(os, mode);
}
inline MultiStreambuf::MultiStreambuf(std::vector<stream> const &osvector)
{
insert(osvector);
}
inline void MultiStreambuf::insert(std::ostream &os, Mode mode)
{
d_os.push_back(stream(os, mode));
}
inline void MultiStreambuf::insert(std::vector<stream> const &os)
{
d_os.insert(d_os.end(), os.begin(), os.end());
}
inline MultiStreambuf::iterator MultiStreambuf::begin()
{
return d_os.begin();
}
inline MultiStreambuf::iterator MultiStreambuf::end()
{
return d_os.end();
}
inline MultiStreambuf::const_iterator MultiStreambuf::begin() const
{
return d_os.begin();
}
inline MultiStreambuf::const_iterator MultiStreambuf::end() const
{
return d_os.end();
}
inline int MultiStreambuf::overflow(int c)
{
if (c == EOF)
sync();
else
d_buffer += c;
return c;
}
inline std::streamsize
MultiStreambuf::xsputn(char const *buffer, std::streamsize n)
{
d_buffer.append(buffer, n);
return n;
}
} // namespace FBB
#endif
|
