bufferview.h

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#pragma once
 
#include <cstdint>
#include <promeki/core/buffer.h>
#include <promeki/core/list.h>
 
PROMEKI_NAMESPACE_BEGIN
 
class BufferView {
        public:
                using List = promeki::List<BufferView>;
 
                BufferView() = default;
 
                BufferView(Buffer::Ptr buf, size_t offset, size_t size)
                        : _buffer(std::move(buf)), _offset(offset), _size(size) { }
 
                const Buffer::Ptr &buffer() const { return _buffer; }
 
                size_t offset() const { return _offset; }
 
                size_t size() const { return _size; }
 
                const uint8_t *data() const {
                        if(!_buffer) return nullptr;
                        return static_cast<const uint8_t *>(_buffer->data()) + _offset;
                }
 
                uint8_t *data() {
                        if(!_buffer) return nullptr;
                        return static_cast<uint8_t *>(_buffer->data()) + _offset;
                }
 
                bool isNull() const { return !_buffer; }
 
                bool isValid() const { return _buffer != nullptr; }
 
        private:
                Buffer::Ptr     _buffer;
                size_t          _offset = 0;
                size_t          _size = 0;
};
 
PROMEKI_NAMESPACE_END