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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vector>
#include <memory>
namespace vsm {
/**
* Simple growable char buffer.
**/
class CharBuffer
{
private:
std::vector<char> _buffer;
size_t _pos;
public:
using SP = std::shared_ptr<CharBuffer>;
/**
* Creates a char buffer with len bytes.
**/
CharBuffer(size_t len = 0);
/**
* Copies n bytes from the src array into the underlying buffer at the
* current position, and updates the position accordingly.
* Resizing will occur if needed.
**/
void put(const char * src, size_t n);
/**
* Resizes the buffer so that the new length becomes len.
* Resizing will not occur if len < current length.
**/
void resize(size_t len);
/**
* Resets the position to the beginning of the buffer.
**/
void reset() { _pos = 0; }
const char * getBuffer() const { return &_buffer[0]; }
size_t getLength() const { return _buffer.size(); }
size_t getPos() const { return _pos; }
size_t getRemaining() const { return getLength() - getPos(); }
void put(char c) { put(&c, 1); }
};
}
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