ShuriZma
/
BizHawk
mirror of https://github.com/TASEmulators/BizHawk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

SettingsUtil: Convert between various integer types automagically because [DefaultValueAttribute] is cls complaint and it's awkward to specify unsigned types for it

This commit is contained in:
nattthebear 2016-02-27 16:50:42 -05:00
parent 4b38880af7
commit 7de39ef656
1 changed files with 30 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
BizHawk.Common/SettingsUtil.cs
View File

@ -34,9 +34,22 @@ namespace BizHawk.Common
f.SetDefaultValues(obj, f.DefaultValues);
}
private static Dictionary<Type, OpCode> IntTypes = new Dictionary<Type,OpCode>
{
{ typeof(byte), OpCodes.Conv_U1 },
{ typeof(sbyte), OpCodes.Conv_I1 },
{ typeof(ushort), OpCodes.Conv_U2 },
{ typeof(short), OpCodes.Conv_I2 },
{ typeof(uint), OpCodes.Conv_U4 },
{ typeof(int), OpCodes.Conv_I4 },
{ typeof(ulong), OpCodes.Conv_U8 },
{ typeof(long), OpCodes.Conv_I8 },
{ typeof(UIntPtr), OpCodes.Conv_U },
{ typeof(IntPtr), OpCodes.Conv_I },
};
private static DefaultValueSetter CreateSetter(Type t)
{
//var dyn = new DynamicMethod("SetDefaultValues_" + t.Name, null, new[] { t }, true);
var dyn = new DynamicMethod("SetDefaultValues_" + t.Name, null, new[] { typeof(object), typeof(object[]) }, false);
var il = dyn.GetILGenerator();
List<object> DefaultValues = new List<object>();
@ -55,9 +68,7 @@ namespace BizHawk.Common
{
object value = (attr as DefaultValueAttribute).Value;
Type desiredType = method.GetParameters()[0].ParameterType;
if (!desiredType.IsAssignableFrom(value.GetType()))
throw new InvalidOperationException(string.Format("Default value assignment will fail for {0}.{1}", t.Name, prop.Name));
Type sourceType = value.GetType();
int idx = DefaultValues.Count;
DefaultValues.Add(value);
@ -66,7 +77,21 @@ namespace BizHawk.Common
il.Emit(OpCodes.Ldarg_1); // arg1: array of default values
il.Emit(OpCodes.Ldc_I4, idx); // load index
il.Emit(OpCodes.Ldelem, typeof(object)); // get default value at appropriate index
il.Emit(OpCodes.Unbox_Any, desiredType); // cast to expected type of set method
// cast to the expected type of the set method
if (desiredType.IsAssignableFrom(sourceType))
{
il.Emit(OpCodes.Unbox_Any, desiredType);
}
else if (IntTypes.ContainsKey(sourceType) && IntTypes.ContainsKey(desiredType))
{
il.Emit(OpCodes.Unbox_Any, sourceType);
il.Emit(IntTypes[desiredType]);
}
else
{
throw new InvalidOperationException(string.Format("Default value assignment will fail for {0}.{1}", t.Name, prop.Name));
}
il.Emit(OpCodes.Callvirt, method);
}
}