IDebugable - add a CanStep() method, and implement it in all IDebuggable implementations

BizHawk.Emulation.Common/Interfaces/IDebuggable.cs

@@ -21,11 +21,15 @@ namespace BizHawk.Emulation.Common
 
 		IMemoryCallbackSystem MemoryCallbacks { get; }
 
-		// Advanced Navigation
+		/// <summary>
-		//void StepInto();
+		/// Informs the calling code whether or not the given step type is implemented,
-		//void StepOut();
+		/// if false, a NotImplementedException will be thrown if Step is called with the given value
-		//void StepOver();
+		/// </summary>
+		bool CanStep(StepType type);
 
+		/// <summary>
+		/// Advances the core based on the given Step type
+		/// </summary>
 		void Step(StepType type);
 	}
 

BizHawk.Emulation.Cores/Calculator/TI83.IDebuggable.cs

@@ -130,5 +130,7 @@ namespace BizHawk.Emulation.Cores.Calculators
 
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
+
+		public bool CanStep(StepType type) { return false; }
 	}
 }

BizHawk.Emulation.Cores/Computers/Commodore64/C64.IDebuggable.cs

@@ -65,5 +65,7 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64
 
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
+
+		public bool CanStep(StepType type) { return false; }
 	}
 }

BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.IDebuggable.cs

@@ -60,6 +60,19 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 
 		public IMemoryCallbackSystem MemoryCallbacks { get; private set; }
 
+		public bool CanStep(StepType type)
+		{
+			switch (type)
+			{
+				case StepType.Into:
+					return true;
+				default:
+				case StepType.Out:
+				case StepType.Over:
+					return false;
+			}
+		}
+
 		[FeatureNotImplemented]
 		public void Step(StepType type)
 		{

BizHawk.Emulation.Cores/Consoles/Atari/7800/Atari7800.IDebuggable.cs

@@ -66,6 +66,8 @@ namespace BizHawk.Emulation.Cores.Atari.Atari7800
 			get { throw new NotImplementedException(); }
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 	}

BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IDebuggable.cs

@@ -133,6 +133,8 @@ namespace BizHawk.Emulation.Cores.ColecoVision
 			get { throw new NotImplementedException(); }
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 	}

BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/Meteor.cs

@@ -27,6 +27,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 			return ret;
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs

@@ -421,6 +421,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 			regs.SetRegister(register, value);
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.cs

@@ -289,6 +289,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.Gameboy
 			_inputCallbacks = ics;
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.cs

@@ -448,6 +448,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.Gameboy
 			MemoryDomains = new MemoryDomainList(mm);
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Nintendo/N64/N64.IDebuggable.cs

@@ -71,6 +71,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.N64
 
 		public IMemoryCallbackSystem MemoryCallbacks { get; private set; }
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.cs

@@ -946,6 +946,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			}
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Nintendo/QuickNES/QuickNES.cs

@@ -397,6 +397,8 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.QuickNES
 			throw new NotImplementedException();
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Nintendo/SNES/LibsnesCore.cs

@@ -254,6 +254,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.SNES
 		public ITracer Tracer { get; private set; }
 		public IMemoryCallbackSystem MemoryCallbacks { get; private set; }
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/PC Engine/PCEngine.cs

@@ -566,6 +566,8 @@ namespace BizHawk.Emulation.Cores.PCEngine
 			};
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Sega/Genesis/Genesis.cs

@@ -292,6 +292,8 @@ namespace BizHawk.Emulation.Cores.Sega.Genesis
 			};
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.cs

@@ -600,6 +600,8 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
 			}
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Sega/gpgx/GPGX.cs

@@ -650,6 +650,8 @@ namespace BizHawk.Emulation.Cores.Consoles.Sega.gpgx
 			return ret;
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/Sony/PSX/Octoshock.cs

@@ -1007,6 +1007,8 @@ namespace BizHawk.Emulation.Cores.Sony.PSX
 		[FeatureNotImplemented]
 		public IMemoryCallbackSystem MemoryCallbacks { get { throw new NotImplementedException(); } }
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }
 

BizHawk.Emulation.Cores/Consoles/WonderSwan/WonderSwan.cs

@@ -351,6 +351,8 @@ namespace BizHawk.Emulation.Cores.WonderSwan
 			throw new NotImplementedException();
 		}
 
+		public bool CanStep(StepType type) { return false; }
+
 		[FeatureNotImplemented]
 		public void Step(StepType type) { throw new NotImplementedException(); }