blob: e94a1ceb4370ca7358903538694a9c72b5b64417 (
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
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "input.h"
#include "output.h"
#include <vespa/vespalib/stllike/allocator.h>
#include <iosfwd>
#include <vector>
namespace vespalib {
/**
* Simple buffer class that implements the Input/Output
* interfaces. Requesting the memory region of this buffer or
* comparing buffers will only look at the data conceptually contained
* in the buffer, ignoring evicted data and reserved data not yet
* committed.
**/
class SimpleBuffer : public Input,
public Output
{
private:
std::vector<char, allocator_large<char>> _data;
size_t _used;
public:
SimpleBuffer();
~SimpleBuffer();
Memory obtain() override;
Input &evict(size_t bytes) override;
WritableMemory reserve(size_t bytes) override;
Output &commit(size_t bytes) override;
SimpleBuffer &add(char c) {
_data.push_back(c);
++_used;
return *this;
}
Memory get() const { return Memory(_data.data(), _used); }
bool operator==(const SimpleBuffer &rhs) const { return (get() == rhs.get()); }
};
std::ostream &operator<<(std::ostream &os, const SimpleBuffer &buf);
} // namespace vespalib
|