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private Beq ( |
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| return | void | |
private void WriteEnumMethod(EnumMapping mapping)
{
string methodName = (string)MethodNames[mapping];
List<Type> argTypes = new List<Type>();
List<string> argNames = new List<string>();
argTypes.Add(mapping.TypeDesc.Type);
argNames.Add("v");
ilg = new CodeGenerator(this.typeBuilder);
ilg.BeginMethod(
typeof(string),
GetMethodBuilder(methodName),
argTypes.ToArray(),
argNames.ToArray(),
CodeGenerator.PrivateMethodAttributes);
LocalBuilder sLoc = ilg.DeclareLocal(typeof(string), "s");
ilg.Load(null);
ilg.Stloc(sLoc);
ConstantMapping[] constants = mapping.Constants;
if (constants.Length > 0)
{
InternalHashtable values = new InternalHashtable();
List<Label> caseLabels = new List<Label>();
List<string> retValues = new List<string>();
Label defaultLabel = ilg.DefineLabel();
Label endSwitchLabel = ilg.DefineLabel();
// This local is necessary; otherwise, it becomes if/else
LocalBuilder localTmp = ilg.DeclareLocal(mapping.TypeDesc.Type, "localTmp");
ilg.Ldarg("v");
ilg.Stloc(localTmp);
for (int i = 0; i < constants.Length; i++)
{
ConstantMapping c = constants[i];
if (values[c.Value] == null)
{
Label caseLabel = ilg.DefineLabel();
ilg.Ldloc(localTmp);
ilg.Ldc(Enum.ToObject(mapping.TypeDesc.Type, c.Value));
ilg.Beq(caseLabel);
caseLabels.Add(caseLabel);
retValues.Add(GetCSharpString(c.XmlName));
values.Add(c.Value, c.Value);
}
}
if (mapping.IsFlags)
{
ilg.Br(defaultLabel);
for (int i = 0; i < caseLabels.Count; i++)
{
ilg.MarkLabel(caseLabels[i]);
ilg.Ldc(retValues[i]);
ilg.Stloc(sLoc);
ilg.Br(endSwitchLabel);
}
ilg.MarkLabel(defaultLabel);
RaCodeGen.ILGenForEnumLongValue(ilg, "v");
LocalBuilder strArray = ilg.DeclareLocal(typeof(String[]), "strArray");
ilg.NewArray(typeof(String), constants.Length);
ilg.Stloc(strArray);
for (int i = 0; i < constants.Length; i++)
{
ConstantMapping c = constants[i];
ilg.Ldloc(strArray);
ilg.Ldc(i);
ilg.Ldstr(GetCSharpString(c.XmlName));
ilg.Stelem(typeof(String));
}
ilg.Ldloc(strArray);
LocalBuilder longArray = ilg.DeclareLocal(typeof(long[]), "longArray");
ilg.NewArray(typeof(long), constants.Length);
ilg.Stloc(longArray);
for (int i = 0; i < constants.Length; i++)
{
ConstantMapping c = constants[i];
ilg.Ldloc(longArray);
ilg.Ldc(i);
ilg.Ldc(c.Value);
ilg.Stelem(typeof(long));
}
ilg.Ldloc(longArray);
ilg.Ldstr(GetCSharpString(mapping.TypeDesc.FullName));
MethodInfo XmlSerializationWriter_FromEnum = typeof(XmlSerializationWriter).GetMethod(
"FromEnum",
CodeGenerator.StaticBindingFlags,
new Type[] { typeof(Int64), typeof(String[]), typeof(Int64[]), typeof(String) }
);
ilg.Call(XmlSerializationWriter_FromEnum);
ilg.Stloc(sLoc);
ilg.Br(endSwitchLabel);
}
else
{
ilg.Br(defaultLabel);
// Case bodies
for (int i = 0; i < caseLabels.Count; i++)
{
ilg.MarkLabel(caseLabels[i]);
ilg.Ldc(retValues[i]);
ilg.Stloc(sLoc);
ilg.Br(endSwitchLabel);
}
MethodInfo CultureInfo_get_InvariantCulture = typeof(CultureInfo).GetMethod(
"get_InvariantCulture",
CodeGenerator.StaticBindingFlags,
Array.Empty<Type>()
);
MethodInfo Int64_ToString = typeof(Int64).GetMethod(
"ToString",
CodeGenerator.InstanceBindingFlags,
new Type[] { typeof(IFormatProvider) }
);
MethodInfo XmlSerializationWriter_CreateInvalidEnumValueException = typeof(XmlSerializationWriter).GetMethod(
"CreateInvalidEnumValueException",
CodeGenerator.InstanceBindingFlags,
new Type[] { typeof(object), typeof(string) }
);
// Default body
ilg.MarkLabel(defaultLabel);
ilg.Ldarg(0);
ilg.Ldarg("v");
ilg.ConvertValue(mapping.TypeDesc.Type, typeof(Int64));
LocalBuilder numLoc = ilg.DeclareLocal(typeof(Int64), "num");
ilg.Stloc(numLoc);
// Invoke method on Value type need address
ilg.LdlocAddress(numLoc);
ilg.Call(CultureInfo_get_InvariantCulture);
ilg.Call(Int64_ToString);
ilg.Ldstr(GetCSharpString(mapping.TypeDesc.FullName));
ilg.Call(XmlSerializationWriter_CreateInvalidEnumValueException);
ilg.Throw();
}
ilg.MarkLabel(endSwitchLabel);
}
ilg.Ldloc(sLoc);
ilg.EndMethod();
}
