Ryujinx/Ryujinx.HLE/HOS/Services/Mii/UtilityImpl.cs

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using Ryujinx.Common.Utilities;
using Ryujinx.Cpu;
using Ryujinx.HLE.HOS.Services.Mii.Types;
using Ryujinx.HLE.HOS.Services.Time;
using Ryujinx.HLE.HOS.Services.Time.Clock;
using System;
namespace Ryujinx.HLE.HOS.Services.Mii
{
class UtilityImpl
{
private uint _x;
private uint _y;
private uint _z;
private uint _w;
public UtilityImpl(ITickSource tickSource)
{
_x = 123456789;
_y = 362436069;
TimeSpanType time = TimeManager.Instance.TickBasedSteadyClock.GetCurrentRawTimePoint(tickSource);
_w = (uint)(time.NanoSeconds & uint.MaxValue);
_z = (uint)((time.NanoSeconds >> 32) & uint.MaxValue);
}
private uint GetRandom()
{
uint t = (_x ^ (_x << 11));
_x = _y;
_y = _z;
_z = _w;
_w = (_w ^ (_w >> 19)) ^ (t ^ (t >> 8));
return _w;
}
public int GetRandom(int end)
{
return (int)GetRandom((uint)end);
}
public uint GetRandom(uint end)
{
uint random = GetRandom();
return random - random / end * end;
}
public uint GetRandom(uint start, uint end)
{
uint random = GetRandom();
return random - random / (1 - start + end) * (1 - start + end) + start;
}
public int GetRandom(int start, int end)
{
return (int)GetRandom((uint)start, (uint)end);
}
public CreateId MakeCreateId()
{
UInt128 value = UInt128Utils.CreateRandom();
// Ensure the random ID generated is valid as a create id.
value &= ~new UInt128(0xC0, 0);
value |= new UInt128(0x80, 0);
return new CreateId(value);
}
}
}