using System.Buffers.Binary;

namespace Uwaa.PNG;

internal static class StreamHelper
{
    public static int ReadBigEndianInt32(Stream stream)
    {
        Span<byte> buffer = stackalloc byte[4];
        stream.Read(buffer);
        return BinaryPrimitives.ReadInt32BigEndian(buffer);
    }

    public static void WriteBigEndianInt32(Stream stream, int value)
    {
        Span<byte> buffer = stackalloc byte[4];
        BinaryPrimitives.WriteInt32BigEndian(buffer, value);
        stream.Write(buffer);
    }

    public static bool TryReadHeaderBytes(Stream stream, out byte[] bytes)
    {
        bytes = new byte[8];
        return stream.Read(bytes, 0, 8) == 8;
    }
}