9 /* Abstract destination of binary data. */
13 virtual void operator () (const unsigned char * data
, size_t len
) = 0;
17 /* A buffered abstract sink. */
18 struct BufferedSink
: Sink
20 size_t bufSize
, bufPos
;
21 unsigned char * buffer
;
23 BufferedSink(size_t bufSize
= 32 * 1024)
24 : bufSize(bufSize
), bufPos(0), buffer(0) { }
27 void operator () (const unsigned char * data
, size_t len
);
31 virtual void write(const unsigned char * data
, size_t len
) = 0;
35 /* Abstract source of binary data. */
40 /* Store exactly ‘len’ bytes in the buffer pointed to by ‘data’.
41 It blocks until all the requested data is available, or throws
42 an error if it is not going to be available. */
43 void operator () (unsigned char * data
, size_t len
);
45 /* Store up to ‘len’ in the buffer pointed to by ‘data’, and
46 return the number of bytes stored. If blocks until at least
47 one byte is available. */
48 virtual size_t read(unsigned char * data
, size_t len
) = 0;
52 /* A buffered abstract source. */
53 struct BufferedSource
: Source
55 size_t bufSize
, bufPosIn
, bufPosOut
;
56 unsigned char * buffer
;
58 BufferedSource(size_t bufSize
= 32 * 1024)
59 : bufSize(bufSize
), bufPosIn(0), bufPosOut(0), buffer(0) { }
62 size_t read(unsigned char * data
, size_t len
);
64 /* Underlying read call, to be overridden. */
65 virtual size_t readUnbuffered(unsigned char * data
, size_t len
) = 0;
71 /* A sink that writes data to a file descriptor. */
72 struct FdSink
: BufferedSink
78 FdSink() : fd(-1), warn(false), written(0) { }
79 FdSink(int fd
) : fd(fd
), warn(false), written(0) { }
82 void write(const unsigned char * data
, size_t len
);
86 /* A source that reads data from a file descriptor. */
87 struct FdSource
: BufferedSource
90 FdSource() : fd(-1) { }
91 FdSource(int fd
) : fd(fd
) { }
92 size_t readUnbuffered(unsigned char * data
, size_t len
);
96 /* A sink that writes data to a string. */
97 struct StringSink
: Sink
100 void operator () (const unsigned char * data
, size_t len
);
104 /* A source that reads data from a string. */
105 struct StringSource
: Source
109 StringSource(const string
& _s
) : s(_s
), pos(0) { }
110 size_t read(unsigned char * data
, size_t len
);
114 void writePadding(size_t len
, Sink
& sink
);
115 void writeInt(unsigned int n
, Sink
& sink
);
116 void writeLongLong(unsigned long long n
, Sink
& sink
);
117 void writeString(const unsigned char * buf
, size_t len
, Sink
& sink
);
118 void writeString(const string
& s
, Sink
& sink
);
119 template<class T
> void writeStrings(const T
& ss
, Sink
& sink
);
121 void readPadding(size_t len
, Source
& source
);
122 unsigned int readInt(Source
& source
);
123 unsigned long long readLongLong(Source
& source
);
124 size_t readString(unsigned char * buf
, size_t max
, Source
& source
);
125 string
readString(Source
& source
);
126 template<class T
> T
readStrings(Source
& source
);
129 MakeError(SerialisationError
, Error
)