mirror of
https://github.com/microsoft/PowerToys.git
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433 lines
17 KiB
C#
433 lines
17 KiB
C#
// ==========================================================================
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// This software is subject to the provisions of the Zope Public License,
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// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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// FOR A PARTICULAR PURPOSE.
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// ==========================================================================
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using System;
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using System.Collections.Specialized;
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using System.Runtime.InteropServices;
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using System.Collections.Generic;
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using System.Collections;
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using System.Reflection;
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namespace Python.Runtime {
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//========================================================================
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// Implements a Python type that provides access to CLR namespaces. The
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// type behaves like a Python module, and can contain other sub-modules.
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//========================================================================
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internal class ModuleObject : ExtensionType {
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Dictionary<string, ManagedType> cache;
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internal string moduleName;
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internal IntPtr dict;
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protected string _namespace;
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public ModuleObject(string name) : base() {
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if (name == String.Empty)
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{
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throw new ArgumentException("Name must not be empty!");
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}
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moduleName = name;
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cache = new Dictionary<string, ManagedType>();
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_namespace = name;
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dict = Runtime.PyDict_New();
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IntPtr pyname = Runtime.PyString_FromString(moduleName);
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Runtime.PyDict_SetItemString(dict, "__name__", pyname);
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Runtime.PyDict_SetItemString(dict, "__file__", Runtime.PyNone);
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Runtime.PyDict_SetItemString(dict, "__doc__", Runtime.PyNone);
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Runtime.Decref(pyname);
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Marshal.WriteIntPtr(this.pyHandle, ObjectOffset.ob_dict, dict);
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InitializeModuleMembers();
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}
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//===================================================================
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// Returns a ClassBase object representing a type that appears in
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// this module's namespace or a ModuleObject representing a child
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// namespace (or null if the name is not found). This method does
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// not increment the Python refcount of the returned object.
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//===================================================================
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public ManagedType GetAttribute(string name, bool guess) {
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ManagedType cached = null;
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this.cache.TryGetValue(name, out cached);
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if (cached != null) {
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return cached;
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}
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ModuleObject m;
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ClassBase c;
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Type type;
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//if (AssemblyManager.IsValidNamespace(name))
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//{
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// IntPtr py_mod_name = Runtime.PyString_FromString(name);
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// IntPtr modules = Runtime.PyImport_GetModuleDict();
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// IntPtr module = Runtime.PyDict_GetItem(modules, py_mod_name);
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// if (module != IntPtr.Zero)
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// return (ManagedType)this;
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// return null;
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//}
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string qname = (_namespace == String.Empty) ? name :
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_namespace + "." + name;
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// If the fully-qualified name of the requested attribute is
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// a namespace exported by a currently loaded assembly, return
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// a new ModuleObject representing that namespace.
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if (AssemblyManager.IsValidNamespace(qname)) {
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m = new ModuleObject(qname);
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StoreAttribute(name, m);
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return (ManagedType) m;
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}
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// Look for a type in the current namespace. Note that this
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// includes types, delegates, enums, interfaces and structs.
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// Only public namespace members are exposed to Python.
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type = AssemblyManager.LookupType(qname);
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if (type != null) {
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if (!type.IsPublic) {
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return null;
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}
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c = ClassManager.GetClass(type);
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StoreAttribute(name, c);
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return (ManagedType) c;
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}
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// This is a little repetitive, but it ensures that the right
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// thing happens with implicit assembly loading at a reasonable
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// cost. Ask the AssemblyManager to do implicit loading for each
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// of the steps in the qualified name, then try it again.
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bool fromFile;
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if (AssemblyManager.LoadImplicit(qname, out fromFile)) {
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bool ignore = name.StartsWith("__");
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if (true == fromFile && (!ignore)) {
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string deprWarning = String.Format("\nThe module was found, but not in a referenced namespace.\n" +
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"Implicit loading is deprecated. Please use clr.AddReference(\"{0}\").", qname);
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Exceptions.deprecation(deprWarning);
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}
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if (AssemblyManager.IsValidNamespace(qname)) {
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m = new ModuleObject(qname);
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StoreAttribute(name, m);
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return (ManagedType) m;
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}
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type = AssemblyManager.LookupType(qname);
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if (type != null) {
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if (!type.IsPublic) {
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return null;
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}
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c = ClassManager.GetClass(type);
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StoreAttribute(name, c);
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return (ManagedType) c;
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}
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}
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// We didn't find the name, so we may need to see if there is a
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// generic type with this base name. If so, we'll go ahead and
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// return it. Note that we store the mapping of the unmangled
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// name to generic type - it is technically possible that some
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// future assembly load could contribute a non-generic type to
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// the current namespace with the given basename, but unlikely
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// enough to complicate the implementation for now.
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if (guess) {
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string gname = GenericUtil.GenericNameForBaseName(
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_namespace, name);
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if (gname != null) {
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ManagedType o = GetAttribute(gname, false);
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if (o != null) {
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StoreAttribute(name, o);
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return o;
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}
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}
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}
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return null;
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}
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//===================================================================
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// Stores an attribute in the instance dict for future lookups.
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//===================================================================
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private void StoreAttribute(string name, ManagedType ob) {
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Runtime.PyDict_SetItemString(dict, name, ob.pyHandle);
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cache[name] = ob;
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}
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//===================================================================
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// Preloads all currently-known names for the module namespace. This
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// can be called multiple times, to add names from assemblies that
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// may have been loaded since the last call to the method.
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//===================================================================
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public void LoadNames() {
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ManagedType m = null;
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foreach (string name in AssemblyManager.GetNames(_namespace)) {
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this.cache.TryGetValue(name, out m);
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if (m == null) {
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ManagedType attr = this.GetAttribute(name, true);
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if (Runtime.wrap_exceptions) {
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if (attr is ExceptionClassObject) {
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ExceptionClassObject c = attr as ExceptionClassObject;
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if (c != null) {
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IntPtr p = attr.pyHandle;
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IntPtr r =Exceptions.GetExceptionClassWrapper(p);
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Runtime.PyDict_SetItemString(dict, name, r);
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Runtime.Incref(r);
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}
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}
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}
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}
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}
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}
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/// <summary>
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/// Initialize module level functions and attributes
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/// </summary>
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internal void InitializeModuleMembers()
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{
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Type funcmarker = typeof(ModuleFunctionAttribute);
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Type propmarker = typeof(ModulePropertyAttribute);
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Type ftmarker = typeof(ForbidPythonThreadsAttribute);
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Type type = this.GetType();
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BindingFlags flags = BindingFlags.Public | BindingFlags.Static;
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while (type != null)
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{
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MethodInfo[] methods = type.GetMethods(flags);
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for (int i = 0; i < methods.Length; i++)
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{
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MethodInfo method = methods[i];
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object[] attrs = method.GetCustomAttributes(funcmarker, false);
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object[] forbid = method.GetCustomAttributes(ftmarker, false);
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bool allow_threads = (forbid.Length == 0);
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if (attrs.Length > 0)
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{
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string name = method.Name;
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MethodInfo[] mi = new MethodInfo[1];
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mi[0] = method;
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ModuleFunctionObject m = new ModuleFunctionObject(name, mi, allow_threads);
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StoreAttribute(name, m);
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}
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}
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PropertyInfo[] properties = type.GetProperties();
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for (int i = 0; i < properties.Length; i++)
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{
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PropertyInfo property = properties[i];
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object[] attrs = property.GetCustomAttributes(propmarker, false);
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if (attrs.Length > 0)
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{
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string name = property.Name;
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ModulePropertyObject p = new ModulePropertyObject(property);
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StoreAttribute(name, p);
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}
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}
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type = type.BaseType;
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}
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}
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//====================================================================
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// ModuleObject __getattribute__ implementation. Module attributes
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// are always either classes or sub-modules representing subordinate
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// namespaces. CLR modules implement a lazy pattern - the sub-modules
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// and classes are created when accessed and cached for future use.
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//====================================================================
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public static IntPtr tp_getattro(IntPtr ob, IntPtr key) {
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ModuleObject self = (ModuleObject)GetManagedObject(ob);
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if (!Runtime.PyString_Check(key)) {
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Exceptions.SetError(Exceptions.TypeError, "string expected");
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return IntPtr.Zero;
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}
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IntPtr op = Runtime.PyDict_GetItem(self.dict, key);
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if (op != IntPtr.Zero) {
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Runtime.Incref(op);
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return op;
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}
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string name = Runtime.GetManagedString(key);
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if (name == "__dict__") {
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Runtime.Incref(self.dict);
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return self.dict;
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}
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ManagedType attr = self.GetAttribute(name, true);
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if (attr == null) {
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Exceptions.SetError(Exceptions.AttributeError, name);
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return IntPtr.Zero;
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}
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// XXX - hack required to recognize exception types. These types
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// may need to be wrapped in old-style class wrappers in versions
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// of Python where new-style classes cannot be used as exceptions.
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if (Runtime.wrap_exceptions) {
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if (attr is ExceptionClassObject) {
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ExceptionClassObject c = attr as ExceptionClassObject;
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if (c != null) {
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IntPtr p = attr.pyHandle;
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IntPtr r = Exceptions.GetExceptionClassWrapper(p);
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Runtime.PyDict_SetItemString(self.dict, name, r);
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Runtime.Incref(r);
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return r;
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}
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}
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}
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Runtime.Incref(attr.pyHandle);
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return attr.pyHandle;
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}
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//====================================================================
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// ModuleObject __repr__ implementation.
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//====================================================================
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public static IntPtr tp_repr(IntPtr ob) {
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ModuleObject self = (ModuleObject)GetManagedObject(ob);
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string s = String.Format("<module '{0}'>", self.moduleName);
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return Runtime.PyString_FromString(s);
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}
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}
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/// <summary>
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/// The CLR module is the root handler used by the magic import hook
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/// to import assemblies. It has a fixed module name "clr" and doesn't
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/// provide a namespace.
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/// </summary>
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internal class CLRModule : ModuleObject
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{
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protected static bool hacked = false;
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protected static bool interactive_preload = true;
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internal static bool preload;
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// XXX Test performance of new features //
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internal static bool _SuppressDocs = false;
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internal static bool _SuppressOverloads = false;
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public CLRModule() : base("clr") {
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_namespace = String.Empty;
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// This hackery is required in order to allow a plain Python to
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// import the managed runtime via the CLR bootstrapper module.
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// The standard Python machinery in control at the time of the
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// import requires the module to pass PyModule_Check. :(
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if (!hacked)
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{
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IntPtr type = this.tpHandle;
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IntPtr mro = Marshal.ReadIntPtr(type, TypeOffset.tp_mro);
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IntPtr ext = Runtime.ExtendTuple(mro, Runtime.PyModuleType);
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Marshal.WriteIntPtr(type, TypeOffset.tp_mro, ext);
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Runtime.Decref(mro);
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hacked = true;
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}
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}
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/// <summary>
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/// The initializing of the preload hook has to happen as late as
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/// possible since sys.ps1 is created after the CLR module is
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/// created.
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/// </summary>
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internal void InitializePreload() {
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if (interactive_preload) {
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interactive_preload = false;
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if (Runtime.PySys_GetObject("ps1") != IntPtr.Zero) {
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preload = true;
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} else {
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Exceptions.Clear();
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preload = false;
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}
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}
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}
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[ModuleFunctionAttribute()]
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public static bool getPreload() {
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return preload;
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}
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[ModuleFunctionAttribute()]
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public static void setPreload(bool preloadFlag)
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{
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preload = preloadFlag;
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}
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//[ModulePropertyAttribute]
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public static bool SuppressDocs {
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get { return _SuppressDocs; }
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set { _SuppressDocs = value; }
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}
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//[ModulePropertyAttribute]
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public static bool SuppressOverloads {
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get { return _SuppressOverloads; }
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set { _SuppressOverloads = value; }
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}
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[ModuleFunctionAttribute()]
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[ForbidPythonThreadsAttribute()]
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public static Assembly AddReference(string name)
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{
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AssemblyManager.UpdatePath();
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Assembly assembly = null;
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assembly = AssemblyManager.LoadAssemblyPath(name);
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if (assembly == null)
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{
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assembly = AssemblyManager.LoadAssembly(name);
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}
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if (assembly == null)
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{
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string msg = String.Format("Unable to find assembly '{0}'.", name);
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throw new System.IO.FileNotFoundException(msg);
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}
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return assembly ;
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}
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[ModuleFunctionAttribute()]
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[ForbidPythonThreadsAttribute()]
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public static string FindAssembly(string name)
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{
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AssemblyManager.UpdatePath();
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return AssemblyManager.FindAssembly(name);
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}
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[ModuleFunctionAttribute()]
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public static String[] ListAssemblies(bool verbose)
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{
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AssemblyName[] assnames = AssemblyManager.ListAssemblies();
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String[] names = new String[assnames.Length];
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for (int i = 0; i < assnames.Length; i++)
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{
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if (verbose)
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names[i] = assnames[i].FullName;
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else
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names[i] = assnames[i].Name;
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}
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return names;
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}
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}
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}
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