From ee655320c5060ec9283a598170756570e03a2543 Mon Sep 17 00:00:00 2001
From: Matthias Benkard <code@mail.matthias.benkard.de>
Date: Sat, 15 Sep 2007 12:45:05 +0200
Subject: Add some support files from PyObjC.

darcs-hash:9abac9aee8a4843a399d1c6472b32ff3bc3aa0ee
---
 Objective-C/objc-runtime-apple.m | 158 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 Objective-C/objc-runtime-apple.m

(limited to 'Objective-C/objc-runtime-apple.m')

diff --git a/Objective-C/objc-runtime-apple.m b/Objective-C/objc-runtime-apple.m
new file mode 100644
index 0000000..a20713b
--- /dev/null
+++ b/Objective-C/objc-runtime-apple.m
@@ -0,0 +1,158 @@
+/* This file is part of the PyObjC package. */
+/*
+ * Support code for the Apple runtime
+ */
+#include "pyobjc.h"
+
+#if defined(APPLE_RUNTIME)
+
+int PyObjCRT_SetupClass(
+	Class cls, 
+	Class metaCls, 
+	const char*name, 
+	Class superCls,
+	Class rootCls,
+	Py_ssize_t ivarSize,
+	struct objc_ivar_list* ivarList,
+	struct objc_protocol_list* protocolList
+)
+
+{
+	/* Initialize the structure */
+	memset(cls, 0, sizeof(*cls));
+	memset(metaCls, 0, sizeof(*cls));
+
+	cls->methodLists = NULL;
+	metaCls->methodLists = NULL;
+	cls->isa = metaCls;
+
+	cls->info = CLS_CLASS; // |CLS_METHOD_ARRAY;
+	metaCls->info = CLS_META; // |CLS_METHOD_ARRAY;
+
+	cls->name = strdup(name);
+	if (cls->name == NULL) {
+		return -1;
+	}
+	metaCls->name = strdup(name);
+	if (metaCls->name == NULL) {
+		free((char*)(cls->name));
+		cls->name = NULL;
+		return -1;
+	}
+
+	cls->methodLists = malloc(sizeof(struct objc_method_list*));
+	if (cls->methodLists == NULL) {
+		PyErr_NoMemory();
+		free((char*)(cls->name)); 
+		cls->name = NULL;
+		free((char*)(metaCls->name)); 
+		metaCls->name = NULL;
+		return -1;
+	}
+	memset(cls->methodLists, 0, sizeof(*(cls->methodLists)));
+
+	metaCls->methodLists = malloc(sizeof(struct objc_method_list*));
+	if (cls->methodLists == NULL) {
+		PyErr_NoMemory();
+		free((char*)(cls->name)); 
+		cls->name = NULL;
+		free((char*)(metaCls->name)); 
+		metaCls->name = NULL;
+		free(cls->methodLists);
+		cls->methodLists = NULL;
+		return -1;
+	}
+	memset(metaCls->methodLists, 0, sizeof(*(metaCls->methodLists)));
+
+	/*
+	 * This is MacOS X specific, and an undocumented feature (long live
+	 * Open Source!).
+	 *
+	 * The code in the objc runtime assumes that the method lists are
+	 * terminated by '-1', and will happily overwite existing data if
+	 * they aren't.
+	 *
+	 * Ronald filed a bugreport for this: Radar #3317376
+	 */
+	cls->methodLists[0] = (struct objc_method_list*)-1;
+	metaCls->methodLists[0] = (struct objc_method_list*)-1;
+
+	cls->super_class = superCls;
+	metaCls->super_class = superCls->isa;
+	metaCls->isa = rootCls->isa;
+
+	cls->instance_size = ivarSize;
+	cls->ivars = ivarList;
+
+	metaCls->instance_size = metaCls->super_class->instance_size;
+	metaCls->ivars = NULL;
+
+	metaCls->protocols = cls->protocols = protocolList;
+
+	return 0;
+}
+
+void PyObjCRT_ClearClass(Class cls)
+{
+	if (cls->methodLists) {
+		if (cls->methodLists) {
+			struct objc_method_list** cur;
+
+			cur = cls->methodLists;
+			while (*cur != (struct objc_method_list*)-1) {
+				if (*cur != NULL) {
+					free(*cur);
+					*cur = NULL;
+				}
+				cur++;
+			}
+			free(cls->methodLists);
+			cls->methodLists = NULL;
+		}
+		cls->methodLists = NULL;
+	}
+
+	if (cls->name) {
+		free((char*)(cls->name));
+	}
+}
+
+struct objc_method_list *PyObjCRT_AllocMethodList(Py_ssize_t numMethods)
+{
+	struct objc_method_list *mlist;
+
+	mlist = malloc(sizeof(struct objc_method_list)
+			 + ((numMethods+1) * sizeof(struct objc_method)));
+
+	if (mlist == NULL) {
+			return NULL;
+	}
+
+	mlist->method_count = 0;
+	mlist->obsolete = NULL;
+
+	return mlist;
+}
+
+struct objc_protocol_list* PyObjCRT_AllocProtocolList(Py_ssize_t numProtocols)
+{
+	struct objc_protocol_list *plist;
+
+	plist = malloc(sizeof(struct objc_protocol_list)
+			 + ((numProtocols+1) * sizeof(Protocol *)));
+
+	if (plist == NULL) {
+			return NULL;
+	}
+
+	plist->count = 0;
+	plist->next = NULL;
+
+	return plist;
+}
+
+#else /* !APPLE_RUNTIME */
+
+static int dummy __attribute__((__unused__));
+
+#endif /* !APPLE_RUNTIME */
-- 
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