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generate_comdispatch.py
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350 lines (299 loc) · 14.9 KB
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# Licensed to the .NET Foundation under one or more agreements.
# The .NET Foundation licenses this file to you under the Apache 2.0 License.
# See the LICENSE file in the project root for more information.
from generate import generate
class VariantType:
def __init__(self,
variantType,
managedType,
emitAccessors=True,
isPrimitiveType=True,
unmanagedRepresentationType=None,
includeInUnionTypes=True,
getStatements=None,
setStatements=None,
critical=False):
self.emitAccessors = emitAccessors
self.variantType = variantType
self.managedType = managedType
self.isPrimitiveType = isPrimitiveType
if unmanagedRepresentationType == None: self.unmanagedRepresentationType = managedType
else: self.unmanagedRepresentationType = unmanagedRepresentationType
self.includeInUnionTypes = includeInUnionTypes
self.getStatements = getStatements
self.setStatements = setStatements
self.managedFieldName = "_" + self.variantType.lower()
firstChar = self.variantType[0]
self.name = self.variantType.lower().replace(firstChar.lower(), firstChar, 1)
self.accessorName = "As" + self.name
self.critical = critical
def write_UnionTypes(self, cw):
if not self.includeInUnionTypes: return
if self.unmanagedRepresentationType == "IntPtr":
cw.write('[SuppressMessage("Microsoft.Reliability", "CA2006:UseSafeHandleToEncapsulateNativeResources")]')
if self.managedFieldName == '_bstr':
cw.write('[SuppressMessage("Microsoft.Performance", "CA1823:AvoidUnusedPrivateFields")]')
cw.write("[FieldOffset(0)] internal %s %s;" % (self.unmanagedRepresentationType, self.managedFieldName))
def write_ToObject(self, cw):
cw.write("case VarEnum.VT_%s: return %s;" % (self.variantType, self.accessorName))
def write_accessor(self, cw, transparent):
if self.emitAccessors == False :
return
cw.write("// VT_%s" % self.variantType)
cw.enter_block('public %s %s' % (self.managedType, self.accessorName))
# Getter
if not transparent and self.critical: gen_exposed_code_security(cw)
cw.enter_block("get")
cw.write("Debug.Assert(VariantType == VarEnum.VT_%s);" % self.variantType)
if self.getStatements == None:
cw.write("return _typeUnion._unionTypes.%s;" % self.managedFieldName)
else:
for s in self.getStatements: cw.write(s)
cw.exit_block()
# Setter
if not transparent and self.critical: gen_exposed_code_security(cw)
cw.enter_block("set")
cw.write("Debug.Assert(IsEmpty); // The setter can only be called once as VariantClear might be needed otherwise")
cw.write("VariantType = VarEnum.VT_%s;" % self.variantType)
if self.setStatements == None:
cw.write("_typeUnion._unionTypes.%s = value;" % self.managedFieldName)
else:
for s in self.setStatements: cw.write(s)
cw.exit_block()
cw.exit_block()
# Byref Setter
cw.writeline()
if not transparent: gen_exposed_code_security(cw)
cw.enter_block("public void SetAsByref%s(ref %s value)" % (self.name, self.unmanagedRepresentationType))
cw.write("Debug.Assert(IsEmpty); // The setter can only be called once as VariantClear might be needed otherwise")
cw.write("VariantType = (VarEnum.VT_%s | VarEnum.VT_BYREF);" % self.variantType)
cw.write("_typeUnion._unionTypes._byref = UnsafeMethods.Convert%sByrefToPtr(ref value);" % self.unmanagedRepresentationType)
cw.exit_block()
cw.writeline()
def write_accessor_propertyinfo(self, cw):
if self.emitAccessors == True :
cw.write('case VarEnum.VT_%s: return typeof(Variant).GetProperty(nameof(Variant.%s));' % (self.variantType, self.accessorName))
def write_byref_setters(self, cw):
if self.emitAccessors == True :
cw.write('case VarEnum.VT_%s: return typeof(Variant).GetMethod(nameof(Variant.SetAsByref%s));' % (self.variantType, self.name))
def write_ComToManagedPrimitiveTypes(self, cw):
wrapper_types = ["CY", "DISPATCH", "UNKNOWN", "ERROR"]
if not self.isPrimitiveType or (self.variantType in wrapper_types) : return
cw.write("dict[VarEnum.VT_%s] = typeof(%s);" % (self.variantType, self.managedType))
def write_IsPrimitiveType(self, cw):
if not self.isPrimitiveType: return
cw.write("case VarEnum.VT_%s:" % self.variantType)
def write_ConvertByrefToPtr(self, cw, transparent):
if self.isPrimitiveType and self.unmanagedRepresentationType == self.managedType and self.variantType != "ERROR":
if not transparent: gen_exposed_code_security(cw)
cw.write('[SuppressMessage("Microsoft.Design", "CA1045:DoNotPassTypesByReference")]')
if self.unmanagedRepresentationType == 'Int32':
cw.enter_block("public static unsafe IntPtr Convert%sByrefToPtr(ref %s value)" % (self.unmanagedRepresentationType, self.unmanagedRepresentationType))
else:
cw.enter_block("internal static unsafe IntPtr Convert%sByrefToPtr(ref %s value)" % (self.unmanagedRepresentationType, self.unmanagedRepresentationType))
cw.enter_block('fixed (%s *x = &value)' % self.unmanagedRepresentationType)
cw.write('AssertByrefPointsToStack(new IntPtr(x));')
cw.write('return new IntPtr(x);')
cw.exit_block()
cw.exit_block()
cw.write('')
def write_ConvertByrefToPtr_Outer(self, cw, transparent):
if self.isPrimitiveType and self.unmanagedRepresentationType == self.managedType and self.variantType != "ERROR":
if not transparent: gen_exposed_code_security(cw)
cw.write('[SuppressMessage("Microsoft.Design", "CA1045:DoNotPassTypesByReference")]')
cw.write("public static IntPtr Convert%sByrefToPtr(ref %s value) { return _Convert%sByrefToPtr(ref value); }" % (self.unmanagedRepresentationType, self.unmanagedRepresentationType, self.unmanagedRepresentationType))
def write_ConvertByrefToPtrDelegates(self, cw):
if self.isPrimitiveType and self.unmanagedRepresentationType == self.managedType and self.variantType != "ERROR":
cw.write("private static readonly ConvertByrefToPtrDelegate<%s> _Convert%sByrefToPtr = (ConvertByrefToPtrDelegate<%s>)Delegate.CreateDelegate(typeof(ConvertByrefToPtrDelegate<%s>), _ConvertByrefToPtr.MakeGenericMethod(typeof(%s)));" % (5 * (self.unmanagedRepresentationType,)))
def gen_exposed_code_security(cw):
cw.write("#if CLR2")
cw.write("[PermissionSet(SecurityAction.LinkDemand, Unrestricted = true)]")
cw.write("#endif")
cw.write("[SecurityCritical]")
variantTypes = [
# VariantType('varEnum', 'managed_type')
VariantType('I1', "SByte"),
VariantType('I2', "Int16"),
VariantType('I4', "Int32"),
VariantType('I8', "Int64"),
VariantType('UI1', "Byte"),
VariantType('UI2', "UInt16"),
VariantType('UI4', "UInt32"),
VariantType('UI8', "UInt64"),
VariantType('INT', "IntPtr"),
VariantType('UINT', "UIntPtr"),
VariantType('BOOL', "Boolean",
unmanagedRepresentationType="Int16",
getStatements=["return _typeUnion._unionTypes._bool != 0;"],
setStatements=["_typeUnion._unionTypes._bool = value ? (Int16)(-1) : (Int16)0;"]),
VariantType("ERROR", "Int32"),
VariantType('R4', "Single"),
VariantType('R8', "Double"),
VariantType('DECIMAL', "Decimal",
includeInUnionTypes=False,
getStatements=["// The first byte of Decimal is unused, but usually set to 0",
"Variant v = this;",
"v._typeUnion._vt = 0;",
"return v._decimal;"],
setStatements=["_decimal = value;",
"// _vt overlaps with _decimal, and should be set after setting _decimal",
"_typeUnion._vt = (ushort)VarEnum.VT_DECIMAL;"]),
VariantType("CY", "Decimal",
unmanagedRepresentationType="Int64",
getStatements=["return Decimal.FromOACurrency(_typeUnion._unionTypes._cy);"],
setStatements=["_typeUnion._unionTypes._cy = Decimal.ToOACurrency(value);"]),
VariantType('DATE', "DateTime",
unmanagedRepresentationType="Double",
getStatements=["return DateTime.FromOADate(_typeUnion._unionTypes._date);"],
setStatements=["_typeUnion._unionTypes._date = value.ToOADate();"]),
VariantType('BSTR', "String",
unmanagedRepresentationType="IntPtr",
getStatements=[
"if (_typeUnion._unionTypes._bstr != IntPtr.Zero) {",
" return Marshal.PtrToStringBSTR(_typeUnion._unionTypes._bstr);",
"}",
"return null;"
],
setStatements=[
"if (value != null) {",
" Marshal.GetNativeVariantForObject(value, UnsafeMethods.ConvertVariantByrefToPtr(ref this));",
"}"
],
critical=True),
VariantType("UNKNOWN", "Object",
isPrimitiveType=False,
unmanagedRepresentationType="IntPtr",
getStatements=[
"if (_typeUnion._unionTypes._dispatch != IntPtr.Zero) {",
" return Marshal.GetObjectForIUnknown(_typeUnion._unionTypes._unknown);",
"}",
"return null;"
],
setStatements=[
"if (value != null) {",
" _typeUnion._unionTypes._unknown = Marshal.GetIUnknownForObject(value);",
"}"
],
critical=True),
VariantType("DISPATCH", "Object",
isPrimitiveType=False,
unmanagedRepresentationType="IntPtr",
getStatements=[
"if (_typeUnion._unionTypes._dispatch != IntPtr.Zero) {",
" return Marshal.GetObjectForIUnknown(_typeUnion._unionTypes._dispatch);",
"}",
"return null;"
],
setStatements=[
"if (value != null) {",
" _typeUnion._unionTypes._unknown = GetIDispatchForObject(value);",
"}"
],
critical=True),
VariantType("VARIANT", "Object",
emitAccessors=False,
isPrimitiveType=False,
unmanagedRepresentationType="Variant",
includeInUnionTypes=False, # will use "this"
getStatements=["return Marshal.GetObjectForNativeVariant(UnsafeMethods.ConvertVariantByrefToPtr(ref this));"],
setStatements=["UnsafeMethods.InitVariantForObject(value, ref this);"],
critical=True)
]
managed_types_to_variant_types_add = [
("Char", "UI2"),
("CurrencyWrapper", "CY"),
("ErrorWrapper", "ERROR"),
]
def gen_UnionTypes(cw):
for variantType in variantTypes:
variantType.write_UnionTypes(cw)
def gen_ToObject(cw):
for variantType in variantTypes:
variantType.write_ToObject(cw)
def gen_accessors(transparent):
def gen_accessors(cw):
for variantType in variantTypes:
variantType.write_accessor(cw, transparent)
return gen_accessors
def gen_accessor_propertyinfo(cw):
for variantType in variantTypes:
variantType.write_accessor_propertyinfo(cw)
def gen_byref_setters(cw):
for variantType in variantTypes:
variantType.write_byref_setters(cw)
def gen_ComToManagedPrimitiveTypes(cw):
for variantType in variantTypes:
variantType.write_ComToManagedPrimitiveTypes(cw)
def gen_ManagedToComPrimitiveTypes(cw):
import System
import clr
# build inverse map
type_map = {}
for variantType in variantTypes:
# take them in order, first one wins ... handles ERROR and INT32 conflict
if variantType.isPrimitiveType and variantType.managedType not in type_map:
type_map[variantType.managedType] = variantType.variantType
for managedType, variantType in managed_types_to_variant_types_add:
type_map[managedType] = variantType
def is_system_type(name):
t = getattr(System, name, None)
return t and System.Type.GetTypeCode(t) not in [System.TypeCode.Empty, System.TypeCode.Object]
system_types = filter(is_system_type, type_map.keys())
system_types = sorted(system_types, key=lambda name: int(System.Type.GetTypeCode(getattr(System, name))))
other_types = sorted(set(type_map.keys()).difference(set(system_types)))
# switch from sytem types
cw.enter_block("switch (Type.GetTypeCode(argumentType))")
for t in system_types:
cw.write("""case TypeCode.%(code)s:
primitiveVarEnum = VarEnum.VT_%(vt)s;
return true;""", code = System.Type.GetTypeCode(getattr(System, t)).ToString(), vt = type_map[t])
cw.exit_block()
# if statements from the rest
for t in other_types:
clrtype = getattr(System, t, None)
if not clrtype: clrtype = getattr(System.Runtime.InteropServices, t, None)
clrtype = clr.GetClrType(clrtype)
cw.write("""
if (argumentType == typeof(%(type)s)) {
primitiveVarEnum = VarEnum.VT_%(vt)s;
return true;
}""", type = clrtype.Name, vt = type_map[t])
def gen_IsPrimitiveType(cw):
for variantType in variantTypes:
variantType.write_IsPrimitiveType(cw)
def gen_ConvertByrefToPtr(transparent):
def gen_ConvertByrefToPtr(cw):
for variantType in variantTypes:
if transparent:
variantType.write_ConvertByrefToPtr_Outer(cw, transparent)
else:
variantType.write_ConvertByrefToPtr(cw, transparent)
return gen_ConvertByrefToPtr
def gen_ConvertByrefToPtrDelegates(cw):
for variantType in variantTypes:
variantType.write_ConvertByrefToPtrDelegates(cw)
def main():
return generate(
("Convert ByRef Delegates", gen_ConvertByrefToPtrDelegates),
("Outer Managed To COM Primitive Type Map", gen_ManagedToComPrimitiveTypes),
("Outer Variant union types", gen_UnionTypes),
("Outer Variant ToObject", gen_ToObject),
("Outer Variant accessors", gen_accessors(True)),
("Outer Variant accessors PropertyInfos", gen_accessor_propertyinfo),
("Outer Variant byref setter", gen_byref_setters),
("Outer ComToManagedPrimitiveTypes", gen_ComToManagedPrimitiveTypes),
("Outer Variant IsPrimitiveType", gen_IsPrimitiveType),
("Outer ConvertByrefToPtr", gen_ConvertByrefToPtr(True)),
#TODO: we don't build ndp\fx\src\Dynamic any more for IronPython
#("Managed To COM Primitive Type Map", gen_ManagedToComPrimitiveTypes),
#("Variant union types", gen_UnionTypes),
#("Variant ToObject", gen_ToObject),
#("Variant accessors", gen_accessors(False)),
#("Variant accessors PropertyInfos", gen_accessor_propertyinfo),
#("Variant byref setter", gen_byref_setters),
#("ComToManagedPrimitiveTypes", gen_ComToManagedPrimitiveTypes),
#("Variant IsPrimitiveType", gen_IsPrimitiveType),
#("ConvertByrefToPtr", gen_ConvertByrefToPtr(False)),
)
if __name__ == "__main__":
main()