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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 <cstddef>
namespace vespalib {
/**
* Reference to a memory buffer with external ownership.
*/
class BufferRef
{
public:
BufferRef() noexcept : _buf(nullptr), _sz(0) { }
BufferRef(void * buf, size_t sz) noexcept : _buf(buf), _sz(sz) { }
const char * c_str() const noexcept { return static_cast<const char *>(_buf); }
char * str() noexcept { return static_cast<char *>(_buf); }
const void * data() const noexcept { return _buf; }
void * data() noexcept { return _buf; }
size_t size() const noexcept { return _sz; }
void setSize(size_t sz) noexcept { _sz = sz; }
char & operator [] (size_t i) noexcept { return str()[i]; }
const char & operator [] (size_t i) const noexcept { return c_str()[i]; }
private:
void * _buf;
size_t _sz;
};
/**
* Reference to a constant memory buffer with external ownership.
*/
class ConstBufferRef
{
public:
ConstBufferRef() noexcept : _buf(nullptr), _sz(0) { }
ConstBufferRef(const void * buf, size_t sz) noexcept : _buf(buf), _sz(sz) { }
ConstBufferRef(const BufferRef & rhs) noexcept : _buf(rhs.data()), _sz(rhs.size()) { }
const char * c_str() const noexcept { return static_cast<const char *>(_buf); }
const void * data() const noexcept { return _buf; }
size_t size() const noexcept { return _sz; }
const char & operator [] (size_t i) const noexcept { return c_str()[i]; }
private:
const void * _buf;
size_t _sz;
};
}
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