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/* Starshatter: The Open Source Project
Copyright (c) 2021-2024, Starshatter: The Open Source Project Contributors
Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
Copyright (c) 1997-2006, Destroyer Studios LLC.
*/
#pragma once
#include <cstddef>
#include <memory>
namespace starshatter
{
namespace foundation
{
using Count = std::size_t;
using Offset = std::ptrdiff_t;
enum class Direction
{
Start,
End,
Current,
};
template <typename Char>
struct BaseReader
{
virtual ~BaseReader() = default;
virtual bool valid() const = 0;
virtual Count available() const = 0;
virtual Count seek(Count pos) = 0;
virtual Count seek(Offset offset, Direction dir) = 0;
virtual Count read(Char* dest) = 0;
virtual Count read(Char* dest, Count bytes) = 0;
virtual Count peek(Char* dest) const = 0;
virtual Count peek(Char* dest, Count bytes) const = 0;
virtual const Char* data() const = 0;
};
struct Reader : public BaseReader<char>
{
using Base = std::unique_ptr<BaseReader>;
using Chars = std::unique_ptr<const char[]>;
Reader();
Reader(const Reader&) = delete;
Reader& operator=(const Reader&) = delete;
Reader(Reader&& other);
Reader& operator=(Reader&& other);
Reader(Base src);
Reader(Chars src);
Reader(Chars src, Count bytes);
Reader(const char* src);
Reader(const char* src, Count bytes);
~Reader() override = default;
bool valid() const override;
Count available() const override;
Count seek(Count pos) override;
Count seek(Offset offset, Direction dir) override;
Count read(char* dest) override;
Count read(char* dest, Count bytes) override;
Count peek(char* dest) const override;
Count peek(char* dest, Count bytes) const override;
const char* data() const override;
private:
Base actual;
};
} // namespace foundation
} // namespace starshatter
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