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using System;
namespace Ryujinx.Memory.Range
{
/// <summary>
/// Range of memory composed of an address and size.
/// </summary>
public struct MemoryRange : IEquatable<MemoryRange>
{
/// <summary>
/// An empty memory range, with a null address and zero size.
/// </summary>
public static MemoryRange Empty => new MemoryRange(0UL, 0);
/// <summary>
/// Start address of the range.
/// </summary>
public ulong Address { get; }
/// <summary>
/// Size of the range in bytes.
/// </summary>
public ulong Size { get; }
/// <summary>
/// Address where the range ends (exclusive).
/// </summary>
public ulong EndAddress => Address + Size;
/// <summary>
/// Creates a new memory range with the specified address and size.
/// </summary>
/// <param name="address">Start address</param>
/// <param name="size">Size in bytes</param>
public MemoryRange(ulong address, ulong size)
{
Address = address;
Size = size;
}
/// <summary>
/// Checks if the range overlaps with another.
/// </summary>
/// <param name="other">The other range to check for overlap</param>
/// <returns>True if the ranges overlap, false otherwise</returns>
public bool OverlapsWith(MemoryRange other)
{
ulong thisAddress = Address;
ulong thisEndAddress = EndAddress;
ulong otherAddress = other.Address;
ulong otherEndAddress = other.EndAddress;
// If any of the ranges if invalid (address + size overflows),
// then they are never considered to overlap.
if (thisEndAddress < thisAddress || otherEndAddress < otherAddress)
{
return false;
}
return thisAddress < otherEndAddress && otherAddress < thisEndAddress;
}
public override bool Equals(object obj)
{
return obj is MemoryRange other && Equals(other);
}
public bool Equals(MemoryRange other)
{
return Address == other.Address && Size == other.Size;
}
public override int GetHashCode()
{
return HashCode.Combine(Address, Size);
}
}
}
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