blob: a87df475bc2cc7f67570504234c041b0a7e82d04 (
plain) (
blame)
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
|
#pragma once
#include "zerocopy.h"
#include "output.h"
/**
* @addtogroup Streams
* @{
*/
/**
* Null input stream. Does nothing, contains no data.
*/
class TNullInput: public IZeroCopyInput {
public:
TNullInput() noexcept;
~TNullInput() override;
private:
size_t DoRead(void* buf, size_t len) override;
size_t DoSkip(size_t len) override;
size_t DoNext(const void** ptr, size_t len) override;
};
/**
* Null output stream. Just ignores whatever is written into it.
*/
class TNullOutput: public IOutputStream {
public:
TNullOutput() noexcept;
~TNullOutput() override;
TNullOutput(TNullOutput&&) noexcept = default;
TNullOutput& operator=(TNullOutput&&) noexcept = default;
private:
void DoWrite(const void* buf, size_t len) override;
};
/**
* Null input-output stream.
*
* @see TNullInput
* @see TNullOutput
*/
class TNullIO: public TNullInput, public TNullOutput {
public:
TNullIO() noexcept;
~TNullIO() override;
};
namespace NPrivate {
TNullIO& StdNullStream() noexcept;
}
/**
* Standard null stream.
*/
#define Cnull (::NPrivate::StdNullStream())
/** @} */
|
