// elementType is FNPTR
internal Type(ElementTypes elementType,
SignatureMethod methodSignature)
{
this.elementType = elementType;
this.methodSignature = methodSignature;
}
private Type parseSignatureType(MetaDataLoader mdLoader)
{
ElementTypes elementType = (ElementTypes)this.buffer[this.offset];
this.offset++;
switch (elementType)
{
case ElementTypes.VOID:
case ElementTypes.BOOLEAN:
case ElementTypes.CHAR:
case ElementTypes.I1:
case ElementTypes.U1:
case ElementTypes.I2:
case ElementTypes.U2:
case ElementTypes.I4:
case ElementTypes.U4:
case ElementTypes.I8:
case ElementTypes.U8:
case ElementTypes.R4:
case ElementTypes.R8:
case ElementTypes.U:
case ElementTypes.I:
case ElementTypes.OBJECT:
case ElementTypes.STRING:
case ElementTypes.TYPEDBYREF: {
return(new Type(elementType));
}
case ElementTypes.VALUETYPE:
case ElementTypes.CLASS: {
// Followed by: TypeDefOrRefEncoded
MetaDataObject classObject = uncompressToken(mdLoader);
return(new Type(elementType, classObject));
}
case ElementTypes.SZARRAY: {
// Followed by: CustomMod* Type
Modifier modifierList = this.parseSignatureModifiers(mdLoader);
Type type = this.parseSignatureType(mdLoader);
return(new Type(elementType, type, modifierList));
}
case ElementTypes.ARRAY: {
// Followed by: Type ArrayShape
Type type = this.parseSignatureType(mdLoader);
uint rank = uncompressInt(this.buffer, ref this.offset);
if (rank == 0)
{
throw new MetaDataLoader.IllegalMetaDataFormatException("ARRAY with rank 0");
}
uint[] upperBounds = new uint[rank];
uint[] lowerBounds = new uint[rank];
uint numUpperBounds =
uncompressInt(this.buffer, ref this.offset);
if (numUpperBounds > rank)
{
throw new MetaDataLoader.IllegalMetaDataFormatException("ARRAY with upper bounds > rank");
}
for (int i = 0; i < numUpperBounds; i++)
{
upperBounds[i] =
uncompressInt(this.buffer, ref this.offset);
}
uint numLowerBounds =
uncompressInt(this.buffer, ref this.offset);
if (numLowerBounds > rank)
{
throw new MetaDataLoader.IllegalMetaDataFormatException("ARRAY with lower bounds > rank");
}
for (int i = 0; i < numLowerBounds; i++)
{
lowerBounds[i] =
uncompressInt(this.buffer, ref this.offset);
}
return(new Type(elementType, type, lowerBounds, upperBounds));
}
case ElementTypes.FNPTR: {
// Followed by: MethodDefSig or MethodRefSig
uint unmaskedCallingConvention =
uncompressInt(this.buffer, ref this.offset);
CallingConventions callingConvention = (CallingConventions)
(unmaskedCallingConvention
& (uint)CallingConventions.Mask);
if (callingConvention == CallingConventions.Field ||
callingConvention == CallingConventions.LocalVar ||
callingConvention == CallingConventions.Property)
{
throw new MetaDataLoader.IllegalMetaDataFormatException("FNPTR surprised by calling convention " + callingConvention);
}
if ((unmaskedCallingConvention
& (uint)CallingConventions.Generic) != 0)
{
throw new MetaDataLoader.IllegalMetaDataFormatException("FNPTR generic unimplemented - check to see if legal");
}
uint paramCount = uncompressInt(this.buffer, ref this.offset);
Type returnType = this.parseSignatureType(mdLoader);
int sentinelLocation = -1;
Param[] parameters = new Param[paramCount];
for (int i = 0; i < paramCount; i++)
{
byte first = this.buffer[this.offset];
if (first == (byte)ElementTypes.SENTINEL)
{
sentinelLocation = i;
this.offset++;
}
parameters[i] = this.parseSignatureParam(mdLoader);
}
SignatureMethod signature =
new SignatureMethod(callingConvention, 0, returnType,
parameters, sentinelLocation);
return(new Type(elementType, signature));
}
case ElementTypes.VAR:
case ElementTypes.MVAR: {
// Generic type variables
uint number = uncompressInt(this.buffer, ref this.offset);
return(new Type(elementType, number));
}
case ElementTypes.GENERICINST: {
// Generic type instantiation
Type type = this.parseSignatureType(mdLoader);
uint typeCount = uncompressInt(this.buffer, ref this.offset);
Type[] typeParams = new Type[typeCount];
for (int i = 0; i < typeCount; i++)
{
Type paramType = this.parseSignatureType(mdLoader);
typeParams[i] = paramType;
}
return(new Type(elementType, type, typeParams));
}
case ElementTypes.CMOD_OPT:
case ElementTypes.CMOD_REQD: {
// Modifiers
this.offset--;
Modifier modifierList = this.parseSignatureModifiers(mdLoader);
Type type = this.parseSignatureType(mdLoader);
return(new Type(elementType, type, modifierList));
}
case ElementTypes.PINNED:
case ElementTypes.PTR:
case ElementTypes.BYREF: {
// Modifiers
Type type = this.parseSignatureType(mdLoader);
return(new Type(elementType, type, (Modifier)null));
}
default: {
throw new MetaDataLoader.IllegalMetaDataFormatException("Unknown signature type: 0x" + ((byte)elementType).ToString("x2") + " at " + this.offset + " in " + this);
}
}
}
