using System.Buffers.Binary;

namespace JCIL.Java.Class;

public struct Reader(Stream stream)
{
    public readonly Stream Stream = stream;
    
    public sbyte ReadInt8()
    {
        return (sbyte)Stream.ReadByte();
    }
    
    public short ReadInt16()
    {
        Span<byte> buffer = stackalloc byte[2];
        Stream.ReadExactly(buffer);
        return BinaryPrimitives.ReadInt16BigEndian(buffer);
    }
    
    public int ReadInt32()
    {
        Span<byte> buffer = stackalloc byte[4];
        Stream.ReadExactly(buffer);
        return BinaryPrimitives.ReadInt32BigEndian(buffer);
    }
    
    public long ReadInt64()
    {
        Span<byte> buffer = stackalloc byte[8];
        Stream.ReadExactly(buffer);
        return BinaryPrimitives.ReadInt64BigEndian(buffer);
    }
    
    public byte ReadUInt8()
    {
        return (byte)Stream.ReadByte();
    }
    
    public ushort ReadUInt16()
    {
        Span<byte> buffer = stackalloc byte[2];
        Stream.ReadExactly(buffer);
        return BinaryPrimitives.ReadUInt16BigEndian(buffer);
    }
    
    public uint ReadUInt32()
    {
        Span<byte> buffer = stackalloc byte[4];
        Stream.ReadExactly(buffer);
        return BinaryPrimitives.ReadUInt32BigEndian(buffer);
    }
    
    public ulong ReadUInt64()
    {
        Span<byte> buffer = stackalloc byte[8];
        Stream.ReadExactly(buffer);
        return BinaryPrimitives.ReadUInt64BigEndian(buffer);
    }
    
    public float ReadFloat()
    {
        Span<byte> buffer = stackalloc byte[4];
        Stream.ReadExactly(buffer);
        return BinaryPrimitives.ReadSingleBigEndian(buffer);
    }
    
    public double ReadDouble()
    {
        Span<byte> buffer = stackalloc byte[8];
        Stream.ReadExactly(buffer);
        return BinaryPrimitives.ReadDoubleBigEndian(buffer);
    }
}