public PointerType(CodeContext/*!*/ context, string name, PythonTuple bases, IAttributesCollection members)
: base(context, name, bases, members) {
object type;
if (members.TryGetValue(SymbolTable.StringToId("_type_"), out type) && !(type is INativeType)) {
throw PythonOps.TypeError("_type_ must be a type");
}
_type = (INativeType)type;
}
internal Field(INativeType fieldType, int offset, int index, int? bits, int? bitOffset) {
_offset = offset;
_fieldType = fieldType;
_index = index;
if (bits != null) {
_bits = bits.Value;
_bitsOffset = bitOffset.Value;
}
}
public ArrayType(CodeContext/*!*/ context, string name, PythonTuple bases, IAttributesCollection dict)
: base(context, name, bases, dict) {
object len;
int iLen;
if (!dict.TryGetValue(SymbolTable.StringToId("_length_"), out len) || !(len is int) || (iLen = (int)len) < 0) {
throw PythonOps.AttributeError("arrays must have _length_ attribute and it must be a positive integer");
}
object type;
if (!dict.TryGetValue(SymbolTable.StringToId("_type_"), out type)) {
throw PythonOps.AttributeError("class must define a '_type_' attribute");
}
_length = iLen;
_type = (INativeType)type;
if (_type is SimpleType) {
SimpleType st = (SimpleType)_type;
if (st._type == SimpleTypeKind.Char) {
// TODO: (c_int * 2).value isn't working
SetCustomMember(context,
SymbolTable.StringToId("value"),
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetCharArrayValue")),
NameType.Property | NameType.Python
)
);
SetCustomMember(context,
SymbolTable.StringToId("raw"),
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayRaw")),
NameType.Property | NameType.Python
)
);
} else if (st._type == SimpleTypeKind.WChar) {
SetCustomMember(context,
SymbolTable.StringToId("value"),
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayValue")),
NameType.Property | NameType.Python
)
);
SetCustomMember(context,
SymbolTable.StringToId("raw"),
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayRaw")),
NameType.Property | NameType.Python
)
);
}
}
}
public PointerType(CodeContext/*!*/ context, string name, PythonTuple bases, PythonDictionary members)
: base(context, name, bases, members) {
object type;
if (members.TryGetValue("_type_", out type) && !(type is INativeType)) {
throw PythonOps.TypeError("_type_ must be a type");
}
_type = (INativeType)type;
if (_type != null) {
_typeFormat = _type.TypeFormat;
}
}
private Expression MakeCall(ArgumentMarshaller[] signature, INativeType nativeRetType, bool retVoid, Expression address)
{
List <object> constantPool = new List <object>();
MethodInfo interopInvoker = CreateInteropInvoker(
GetCallingConvention(),
signature,
nativeRetType,
retVoid,
constantPool
);
// build the args - IntPtr, user Args, constant pool
Expression[] callArgs = new Expression[signature.Length + 2];
callArgs[0] = address;
for (int i = 0; i < signature.Length; i++)
{
callArgs[i + 1] = signature[i].ArgumentExpression;
}
callArgs[callArgs.Length - 1] = Expression.Constant(constantPool.ToArray());
return(Expression.Call(interopInvoker, callArgs));
}
internal static void AddAnonymousFields(PythonType type, List<Field> allFields, INativeType cdata, Field newField) {
Field[] childFields;
if (cdata is StructType) {
childFields = ((StructType)cdata)._fields;
} else if (cdata is UnionType) {
childFields = ((UnionType)cdata)._fields;
} else {
throw PythonOps.TypeError("anonymous field must be struct or union");
}
foreach (Field existingField in childFields) {
Field anonField = new Field(
existingField.FieldName,
existingField.NativeType,
checked(existingField.offset + newField.offset),
allFields.Count
);
type.AddSlot(SymbolTable.StringToId(existingField.FieldName), anonField);
allFields.Add(anonField);
}
}
public ArrayType(CodeContext /*!*/ context, string name, PythonTuple bases, PythonDictionary dict)
: base(context, name, bases, dict)
{
object len;
int iLen;
if (!dict.TryGetValue("_length_", out len) || !(len is int) || (iLen = (int)len) < 0)
{
throw PythonOps.AttributeError("arrays must have _length_ attribute and it must be a positive integer");
}
object type;
if (!dict.TryGetValue("_type_", out type))
{
throw PythonOps.AttributeError("class must define a '_type_' attribute");
}
_length = iLen;
_type = (INativeType)type;
if (_type is SimpleType)
{
SimpleType st = (SimpleType)_type;
if (st._type == SimpleTypeKind.Char)
{
// TODO: (c_int * 2).value isn't working
SetCustomMember(context,
"value",
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetCharArrayValue")),
NameType.Property | NameType.Python
)
);
SetCustomMember(context,
"raw",
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayRaw")),
NameType.Property | NameType.Python
)
);
}
else if (st._type == SimpleTypeKind.WChar)
{
SetCustomMember(context,
"value",
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayValue")),
NameType.Property | NameType.Python
)
);
SetCustomMember(context,
"raw",
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayRaw")),
NameType.Property | NameType.Python
)
);
}
}
}
internal Field(INativeType fieldType, int offset, int index) {
_offset = offset;
_fieldType = fieldType;
_index = index;
}
/// <summary>
/// Emits the marshalling code to create a CData object for reverse marshalling.
/// </summary>
private static void EmitCDataCreation(INativeType type, ILGenerator method, List<object> constantPool, int constantPoolArgument) {
LocalBuilder locVal = method.DeclareLocal(type.GetNativeType());
method.Emit(OpCodes.Stloc, locVal);
method.Emit(OpCodes.Ldloca, locVal);
constantPool.Add(type);
method.Emit(OpCodes.Ldarg, constantPoolArgument);
method.Emit(OpCodes.Ldc_I4, constantPool.Count - 1);
method.Emit(OpCodes.Ldelem_Ref);
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("CreateCData"));
}
/// <summary>
/// Shared helper between struct and union for getting field info and validating it.
/// </summary>
private static void GetFieldInfo(INativeType type, object o, out string fieldName, out INativeType cdata, out int? bitCount) {
PythonTuple pt = o as PythonTuple;
if (pt.Count != 2 && pt.Count != 3) {
throw PythonOps.AttributeError("'_fields_' must be a sequence of pairs");
}
fieldName = pt[0] as string;
if (fieldName == null) {
throw PythonOps.TypeError("first item in _fields_ tuple must be a string, got", PythonTypeOps.GetName(pt[0]));
}
cdata = pt[1] as INativeType;
if (cdata == null) {
throw PythonOps.TypeError("second item in _fields_ tuple must be a C type, got {0}", PythonTypeOps.GetName(pt[0]));
} else if (cdata == type) {
throw StructureCannotContainSelf();
}
StructType st = cdata as StructType;
if (st != null) {
st.EnsureFinal();
}
if (pt.Count != 3) {
bitCount = null;
} else {
bitCount = CheckBits(cdata, pt);
}
}
private void MakeReverseDelegateWorker(CodeContext context)
{
Type[] sigTypes;
Type[] callSiteType;
Type retType;
GetSignatureInfo(out sigTypes, out callSiteType, out retType);
DynamicMethod dm = new DynamicMethod("ReverseInteropInvoker", retType, ArrayUtils.RemoveLast(sigTypes), DynamicModule);
ILGenerator ilGen = dm.GetILGenerator();
PythonContext pc = context.LanguageContext;
Type callDelegateSiteType = CompilerHelpers.MakeCallSiteDelegateType(callSiteType);
CallSite site = CallSite.Create(callDelegateSiteType, pc.Invoke(new CallSignature(_argtypes.Length)));
List <object> constantPool = new List <object>();
constantPool.Add(null); // 1st item is the target object, will be put in later.
constantPool.Add(site);
ilGen.BeginExceptionBlock();
//CallSite<Func<CallSite, object, object>> mySite;
//mySite.Target(mySite, target, ...);
LocalBuilder siteLocal = ilGen.DeclareLocal(site.GetType());
ilGen.Emit(OpCodes.Ldarg_0);
ilGen.Emit(OpCodes.Ldc_I4, constantPool.Count - 1);
ilGen.Emit(OpCodes.Ldelem_Ref);
ilGen.Emit(OpCodes.Castclass, site.GetType());
ilGen.Emit(OpCodes.Stloc, siteLocal);
ilGen.Emit(OpCodes.Ldloc, siteLocal);
ilGen.Emit(OpCodes.Ldfld, site.GetType().GetField("Target"));
ilGen.Emit(OpCodes.Ldloc, siteLocal);
// load code context
int contextIndex = constantPool.Count;
Debug.Assert(pc.SharedContext != null);
constantPool.Add(pc.SharedContext);
ilGen.Emit(OpCodes.Ldarg_0);
ilGen.Emit(OpCodes.Ldc_I4, contextIndex);
ilGen.Emit(OpCodes.Ldelem_Ref);
// load function target, in constant pool slot 0
ilGen.Emit(OpCodes.Ldarg_0);
ilGen.Emit(OpCodes.Ldc_I4_0);
ilGen.Emit(OpCodes.Ldelem_Ref);
// load arguments
for (int i = 0; i < _argtypes.Length; i++)
{
INativeType nativeType = _argtypes[i];
nativeType.EmitReverseMarshalling(ilGen, new Arg(i + 1, sigTypes[i + 1]), constantPool, 0);
}
ilGen.Emit(OpCodes.Call, callDelegateSiteType.GetMethod("Invoke"));
LocalBuilder finalRes = null;
// emit forward marshaling for return value
if (_restype != null)
{
LocalBuilder tmpRes = ilGen.DeclareLocal(typeof(object));
ilGen.Emit(OpCodes.Stloc, tmpRes);
finalRes = ilGen.DeclareLocal(retType);
((INativeType)_restype).EmitMarshalling(ilGen, new Local(tmpRes), constantPool, 0);
ilGen.Emit(OpCodes.Stloc, finalRes);
}
else
{
ilGen.Emit(OpCodes.Pop);
}
// } catch(Exception e) {
// emit the cleanup code
ilGen.BeginCatchBlock(typeof(Exception));
ilGen.Emit(OpCodes.Ldarg_0);
ilGen.Emit(OpCodes.Ldc_I4, contextIndex);
ilGen.Emit(OpCodes.Ldelem_Ref);
ilGen.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("CallbackException"));
ilGen.EndExceptionBlock();
if (_restype != null)
{
ilGen.Emit(OpCodes.Ldloc, finalRes);
}
ilGen.Emit(OpCodes.Ret);
_reverseDelegateConstants = constantPool;
_reverseDelegateType = GetReverseDelegateType(ArrayUtils.RemoveFirst(sigTypes), CallingConvention);
_reverseDelegate = dm;
}
public CDataMarshaller(Expression /*!*/ container, Type /*!*/ type, INativeType /*!*/ cdataType)
: base(container)
{
_type = type;
_cdataType = cdataType;
}
public void set_type(PythonType type) {
_type = (INativeType)type;
}
public object this[Slice index] {
get {
if (index.stop == null)
{
throw PythonOps.ValueError("slice stop is required");
}
int start = index.start != null ? (int)index.start : 0;
int stop = index.stop != null ? (int)index.stop : 0;
int step = index.step != null ? (int)index.step : 1;
if (step < 0 && index.start == null)
{
throw PythonOps.ValueError("slice start is required for step < 0");
}
if (start < 0)
{
start = 0;
}
INativeType type = ((PointerType)NativeType)._type;
SimpleType elemType = type as SimpleType;
if ((stop < start && step > 0) || (start < stop && step < 0))
{
if (elemType != null)
{
if (elemType._type == SimpleTypeKind.Char)
{
return(Bytes.Empty);
}
if (elemType._type == SimpleTypeKind.WChar)
{
return(string.Empty);
}
}
return(new PythonList());
}
MemoryHolder address = MemHolder.ReadMemoryHolder(0);
if (elemType != null)
{
if (elemType._type == SimpleTypeKind.Char)
{
Debug.Assert(((INativeType)elemType).Size == 1);
var sb = new MemoryStream();
for (int i = start; stop > start ? i <stop : i> stop; i += step)
{
sb.WriteByte(address.ReadByte(i));
}
return(Bytes.Make(sb.ToArray()));
}
if (elemType._type == SimpleTypeKind.WChar)
{
int elmSize = ((INativeType)elemType).Size;
var sb = new StringBuilder();
for (int i = start; stop > start ? i <stop : i> stop; i += step)
{
sb.Append((char)address.ReadInt16(checked (i * elmSize)));
}
return(sb.ToString());
}
}
PythonList res = new PythonList((stop - start) / step);
for (int i = start; stop > start ? i <stop : i> stop; i += step)
{
res.AddNoLock(
type.GetValue(address, this, checked (type.Size * i), false)
);
}
return(res);
}
}
private int UpdateSizeAndAlignment(INativeType cdata, int? bitCount, INativeType lastType, ref int size, ref int alignment, ref int? totalBitCount) {
int prevSize = size;
if (bitCount != null) {
if (lastType != null && lastType.Size != cdata.Size) {
totalBitCount = null;
prevSize = size += lastType.Size;
}
size = PythonStruct.Align(size, cdata.Alignment);
if (totalBitCount != null) {
if ((bitCount + totalBitCount + 7) / 8 <= cdata.Size) {
totalBitCount = bitCount + totalBitCount;
} else {
size += lastType.Size;
prevSize = size;
totalBitCount = bitCount;
}
} else {
totalBitCount = bitCount;
}
} else {
if (totalBitCount != null) {
size += lastType.Size;
prevSize = size;
totalBitCount = null;
}
if (_pack != null) {
alignment = _pack.Value;
prevSize = size = PythonStruct.Align(size, _pack.Value);
size += cdata.Size;
} else {
alignment = Math.Max(alignment, cdata.Alignment);
prevSize = size = PythonStruct.Align(size, cdata.Alignment);
size += cdata.Size;
}
}
return prevSize;
}
/// <summary>
/// Creates a method for calling with the specified signature. The returned method has a signature
/// of the form:
///
/// (IntPtr funcAddress, arg0, arg1, ..., object[] constantPool)
///
/// where IntPtr is the address of the function to be called. The arguments types are based upon
/// the types that the ArgumentMarshaller requires.
/// </summary>
private static MethodInfo /*!*/ CreateInteropInvoker(CallingConvention convention, ArgumentMarshaller /*!*/[] /*!*/ sig, INativeType nativeRetType, bool retVoid, List <object> constantPool)
{
Type[] sigTypes = new Type[sig.Length + 2];
sigTypes[0] = typeof(IntPtr);
for (int i = 0; i < sig.Length; i++)
{
sigTypes[i + 1] = sig[i].ArgumentExpression.Type;
}
sigTypes[sigTypes.Length - 1] = typeof(object[]);
Type retType = retVoid ? typeof(void) :
nativeRetType != null?nativeRetType.GetPythonType() : typeof(int);
Type calliRetType = retVoid ? typeof(void) :
nativeRetType != null?nativeRetType.GetNativeType() : typeof(int);
#if !CTYPES_USE_SNIPPETS
DynamicMethod dm = new DynamicMethod("InteropInvoker", retType, sigTypes, DynamicModule);
#else
TypeGen tg = Snippets.Shared.DefineType("InteropInvoker", typeof(object), false, false);
MethodBuilder dm = tg.TypeBuilder.DefineMethod("InteropInvoker", CompilerHelpers.PublicStatic, retType, sigTypes);
#endif
ILGenerator method = dm.GetILGenerator();
LocalBuilder calliRetTmp = null, finalRetValue = null;
if (dm.ReturnType != typeof(void))
{
calliRetTmp = method.DeclareLocal(calliRetType);
finalRetValue = method.DeclareLocal(dm.ReturnType);
}
// try {
// emit all of the arguments, save their cleanups
method.BeginExceptionBlock();
List <MarshalCleanup> cleanups = null;
for (int i = 0; i < sig.Length; i++)
{
#if DEBUG
method.Emit(OpCodes.Ldstr, String.Format("Argument #{0}, Marshaller: {1}, Native Type: {2}", i, sig[i], sig[i].NativeType));
method.Emit(OpCodes.Pop);
#endif
MarshalCleanup cleanup = sig[i].EmitCallStubArgument(method, i + 1, constantPool, sigTypes.Length - 1);
if (cleanup != null)
{
if (cleanups == null)
{
cleanups = new List <MarshalCleanup>();
}
cleanups.Add(cleanup);
}
}
// emit the target function pointer and the calli
#if DEBUG
method.Emit(OpCodes.Ldstr, "!!! CALLI !!!");
method.Emit(OpCodes.Pop);
#endif
method.Emit(OpCodes.Ldarg_0);
method.Emit(OpCodes.Calli, GetCalliSignature(convention, sig, calliRetType));
// if we have a return value we need to store it and marshal to Python
// before we run any cleanup code.
if (retType != typeof(void))
{
#if DEBUG
method.Emit(OpCodes.Ldstr, "!!! Return !!!");
method.Emit(OpCodes.Pop);
#endif
if (nativeRetType != null)
{
method.Emit(OpCodes.Stloc, calliRetTmp);
nativeRetType.EmitReverseMarshalling(method, new Local(calliRetTmp), constantPool, sig.Length + 1);
method.Emit(OpCodes.Stloc, finalRetValue);
}
else
{
Debug.Assert(retType == typeof(int));
// no marshalling necessary
method.Emit(OpCodes.Stloc, finalRetValue);
}
}
// } finally {
// emit the cleanup code
method.BeginFinallyBlock();
if (cleanups != null)
{
foreach (MarshalCleanup mc in cleanups)
{
mc.Cleanup(method);
}
}
method.EndExceptionBlock();
// }
// load the temporary value and return it.
if (retType != typeof(void))
{
method.Emit(OpCodes.Ldloc, finalRetValue);
}
method.Emit(OpCodes.Ret);
#if CTYPES_USE_SNIPPETS
return(tg.TypeBuilder.CreateType().GetMethod("InteropInvoker"));
#else
return(dm);
#endif
}
internal Field(string fieldName, INativeType fieldType, int offset, int index) {
_offset = offset;
_fieldType = fieldType;
_index = index;
_fieldName = fieldName;
}
private Expression MakeCall(ArgumentMarshaller[] signature, INativeType nativeRetType, bool retVoid) {
List<object> constantPool = new List<object>();
MethodInfo interopInvoker = CreateInteropInvoker(
GetCallingConvention(),
signature,
nativeRetType,
retVoid,
constantPool
);
// build the args - IntPtr, user Args, constant pool
Expression[] callArgs = new Expression[signature.Length + 2];
callArgs[0] = Expression.Property(
Expression.Convert(Expression, typeof(_CFuncPtr)),
"addr"
);
for (int i = 0; i < signature.Length; i++) {
callArgs[i + 1] = signature[i].ArgumentExpression;
}
callArgs[callArgs.Length - 1] = Expression.Constant(constantPool.ToArray());
return Expression.Call(interopInvoker, callArgs);
}
/// <summary>
/// Creates a method for calling with the specified signature. The returned method has a signature
/// of the form:
///
/// (IntPtr funcAddress, arg0, arg1, ..., object[] constantPool)
///
/// where IntPtr is the address of the function to be called. The arguments types are based upon
/// the types that the ArgumentMarshaller requires.
/// </summary>
private static MethodInfo/*!*/ CreateInteropInvoker(CallingConvention convention, ArgumentMarshaller/*!*/[]/*!*/ sig, INativeType nativeRetType, bool retVoid, List<object> constantPool) {
Type[] sigTypes = new Type[sig.Length + 2];
sigTypes[0] = typeof(IntPtr);
for (int i = 0; i < sig.Length; i++) {
sigTypes[i + 1] = sig[i].ArgumentExpression.Type;
}
sigTypes[sigTypes.Length - 1] = typeof(object[]);
Type retType = retVoid ? typeof(void) :
nativeRetType != null ? nativeRetType.GetPythonType() : typeof(int);
Type calliRetType = retVoid ? typeof(void) :
nativeRetType != null ? nativeRetType.GetNativeType() : typeof(int);
#if !CTYPES_USE_SNIPPETS
DynamicMethod dm = new DynamicMethod("InteropInvoker", retType, sigTypes, DynamicModule);
#else
TypeGen tg = Snippets.Shared.DefineType("InteropInvoker", typeof(object), false, false);
MethodBuilder dm = tg.TypeBuilder.DefineMethod("InteropInvoker", CompilerHelpers.PublicStatic, retType, sigTypes);
#endif
ILGenerator method = dm.GetILGenerator();
LocalBuilder calliRetTmp = null, finalRetValue = null;
if (dm.ReturnType != typeof(void)) {
calliRetTmp = method.DeclareLocal(calliRetType);
finalRetValue = method.DeclareLocal(dm.ReturnType);
}
// try {
// emit all of the arguments, save their cleanups
method.BeginExceptionBlock();
List<MarshalCleanup> cleanups = null;
for (int i = 0; i < sig.Length; i++) {
#if DEBUG
method.Emit(OpCodes.Ldstr, String.Format("Argument #{0}, Marshaller: {1}, Native Type: {2}", i, sig[i], sig[i].NativeType));
method.Emit(OpCodes.Pop);
#endif
MarshalCleanup cleanup = sig[i].EmitCallStubArgument(method, i + 1, constantPool, sigTypes.Length - 1);
if (cleanup != null) {
if (cleanups == null) {
cleanups = new List<MarshalCleanup>();
}
cleanups.Add(cleanup);
}
}
// emit the target function pointer and the calli
#if DEBUG
method.Emit(OpCodes.Ldstr, "!!! CALLI !!!");
method.Emit(OpCodes.Pop);
#endif
method.Emit(OpCodes.Ldarg_0);
method.Emit(OpCodes.Calli, GetCalliSignature(convention, sig, calliRetType));
// if we have a return value we need to store it and marshal to Python
// before we run any cleanup code.
if (retType != typeof(void)) {
#if DEBUG
method.Emit(OpCodes.Ldstr, "!!! Return !!!");
method.Emit(OpCodes.Pop);
#endif
if (nativeRetType != null) {
method.Emit(OpCodes.Stloc, calliRetTmp);
nativeRetType.EmitReverseMarshalling(method, new Local(calliRetTmp), constantPool, sig.Length + 1);
method.Emit(OpCodes.Stloc, finalRetValue);
} else {
Debug.Assert(retType == typeof(int));
// no marshalling necessary
method.Emit(OpCodes.Stloc, finalRetValue);
}
}
// } finally {
// emit the cleanup code
method.BeginFinallyBlock();
if (cleanups != null) {
foreach (MarshalCleanup mc in cleanups) {
mc.Cleanup(method);
}
}
method.EndExceptionBlock();
// }
// load the temporary value and return it.
if (retType != typeof(void)) {
method.Emit(OpCodes.Ldloc, finalRetValue);
}
method.Emit(OpCodes.Ret);
#if CTYPES_USE_SNIPPETS
return tg.TypeBuilder.CreateType().GetMethod("InteropInvoker");
#else
return dm;
#endif
}
public void set_type(PythonType type)
{
_type = (INativeType)type;
}
public CDataMarshaller(Expression/*!*/ container, Type/*!*/ type, INativeType/*!*/cdataType)
: base(container) {
_type = type;
_cdataType = cdataType;
}
/// <summary>
/// Verifies that the provided bit field settings are valid for this type.
/// </summary>
private static int CheckBits(INativeType cdata, PythonTuple pt) {
int bitCount = Converter.ConvertToInt32(pt[2]);
SimpleType simpType = cdata as SimpleType;
if (simpType == null) {
throw PythonOps.TypeError("bit fields not allowed for type {0}", ((PythonType)cdata).Name);
}
switch (simpType._type) {
case SimpleTypeKind.Object:
case SimpleTypeKind.Pointer:
case SimpleTypeKind.Single:
case SimpleTypeKind.Double:
case SimpleTypeKind.Char:
case SimpleTypeKind.CharPointer:
case SimpleTypeKind.WChar:
case SimpleTypeKind.WCharPointer:
throw PythonOps.TypeError("bit fields not allowed for type {0}", ((PythonType)cdata).Name);
}
if (bitCount <= 0 || bitCount > cdata.Size * 8) {
throw PythonOps.ValueError("number of bits invalid for bit field");
}
return bitCount;
}
/// <summary>
/// Shared helper between struct and union for getting field info and validating it.
/// </summary>
private static void GetFieldInfo(INativeType type, object o, out string fieldName, out INativeType cdata, out int?bitCount)
{
PythonTuple pt = o as PythonTuple;
if (pt.Count != 2 && pt.Count != 3)
{
throw PythonOps.AttributeError("'_fields_' must be a sequence of pairs");
}
fieldName = pt[0] as string;
if (fieldName == null)
{
throw PythonOps.TypeError("first item in _fields_ tuple must be a string, got", PythonTypeOps.GetName(pt[0]));
}
cdata = pt[1] as INativeType;
if (cdata == null)
{
throw PythonOps.TypeError("second item in _fields_ tuple must be a C type, got {0}", PythonTypeOps.GetName(pt[0]));
}
else if (cdata == type)
{
throw StructureCannotContainSelf();
}
StructType st = cdata as StructType;
if (st != null)
{
st.EnsureFinal();
}
if (pt.Count != 3)
{
bitCount = null;
}
else
{
bitCount = CheckBits(cdata, pt);
}
}
internal static void AddAnonymousFields(PythonType type, List <Field> allFields, INativeType cdata, Field newField)
{
Field[] childFields;
if (cdata is StructType)
{
childFields = ((StructType)cdata)._fields;
}
else if (cdata is UnionType)
{
childFields = ((UnionType)cdata)._fields;
}
else
{
throw PythonOps.TypeError("anonymous field must be struct or union");
}
foreach (Field existingField in childFields)
{
Field anonField = new Field(
existingField.FieldName,
existingField.NativeType,
checked (existingField.offset + newField.offset),
allFields.Count
);
type.AddSlot(existingField.FieldName, anonField);
allFields.Add(anonField);
}
}
private ArgumentMarshaller/*!*/ GetMarshaller(Expression/*!*/ expr, object value, int index, INativeType nativeType) {
if (nativeType != null) {
return new CDataMarshaller(expr, CompilerHelpers.GetType(value), nativeType);
}
CData data = value as CData;
if (data != null) {
return new CDataMarshaller(expr, CompilerHelpers.GetType(value), data.NativeType);
}
NativeArgument arg = value as NativeArgument;
if (arg != null) {
return new NativeArgumentMarshaller(expr, value.GetType());
}
object val;
if (PythonOps.TryGetBoundAttr(value, SymbolTable.StringToId("_as_parameter_"), out val)) {
throw new NotImplementedException("_as_parameter");
//return new UserDefinedMarshaller(GetMarshaller(..., value, index));
}
// Marshalling primitive or an object
return new PrimitiveMarshaller(expr, CompilerHelpers.GetType(value));
}
