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Adds memory.hash_region to aid in detecting RAM changes

This commit is contained in:
Tastyfish 2017-10-25 16:38:37 -04:00
parent f94d3f58c6
commit fef2c131f8
1 changed files with 32 additions and 0 deletions
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32
BizHawk.Client.Common/lua/EmuLuaLibrary.Memory.cs
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@ -4,6 +4,7 @@ using System.ComponentModel;
using NLua;
using BizHawk.Emulation.Common;
using BizHawk.Emulation.Common.IEmulatorExtensions;
using BizHawk.Common.BufferExtensions;
namespace BizHawk.Client.Common
{
@ -108,6 +109,37 @@ namespace BizHawk.Client.Common
return false;
}
[LuaMethod("hash_region", "Returns a hash as a string of a region of memory, starting from addr, through count bytes. If the domain is unspecified, it uses the current region.")]
public string HashRegion(int addr, int count, string domain = null)
{
var d = string.IsNullOrEmpty(domain) ? Domain : DomainList[VerifyMemoryDomain(domain)];
// checks
if (addr < 0 || addr >= d.Size)
{
string error = $"Address {addr} is outside the bounds of domain {d.Name}";
Log(error);
throw new ArgumentOutOfRangeException(error);
}
if (addr + count > d.Size)
{
string error = $"Address {addr} + count {count} is outside the bounds of domain {d.Name}";
Log(error);
throw new ArgumentOutOfRangeException(error);
}
byte[] data = new byte[count];
for (int i = 0; i < count; i++)
{
data[i] = d.PeekByte(addr + i);
}
using (var hasher = System.Security.Cryptography.SHA256.Create())
{
return hasher.ComputeHash(data).BytesToHexString();
}
}
#endregion
#region Common Special and Legacy Methods