1 files changed, 61 insertions, 5 deletions
diff --git a/darwintest/objc_darwin.go b/darwintest/objc_darwin.go
index 79fe4d3..ce6b87b 100644
--- a/darwintest/objc_darwin.go
+++ b/darwintest/objc_darwin.go
@@ -1,16 +1,72 @@
 // 28 february 2014
 package main
 
-/*
-These are wrapper functions for the functions in bleh_darwin.m to wrap around stdint.h type casting.
-
-This will eventually be expanded to include the other Objective-C runtime support functions.
-*/
+import (
+	"unsafe"
+)
 
 // #cgo LDFLAGS: -lobjc -framework Foundation
+// #include <stdlib.h>
 // #include "objc_darwin.h"
 import "C"
 
+func objc_getClass(class string) C.id {
+	cclass := C.CString(class)
+	defer C.free(unsafe.Pointer(cclass))
+
+	return C.objc_getClass(cclass)
+}
+
+func sel_getUid(sel string) C.SEL {
+	csel := C.CString(sel)
+	defer C.free(unsafe.Pointer(csel))
+
+	return C.sel_getUid(csel)
+}
+
+// Common Objective-C types and selectors.
+var (
+	_NSString = objc_getClass("NSString")
+
+	_alloc = sel_getUid("alloc")
+	_new = sel_getUid("new")
+	_release = sel_getUid("release")
+	_stringWithUTF8String = sel_getUid("stringWithUTF8String:")
+	_UTF8String = sel_getUid("UTF8String")
+)
+
+// some helper functions
+
+func objc_alloc(class C.id) C.id {
+	return C.objc_msgSend_noargs(class, _alloc)
+}
+
+func objc_new(class C.id) C.id {
+	return C.objc_msgSend_noargs(class, _new)
+}
+
+func objc_release(obj C.id) {
+	C.objc_msgSend_noargs(obj, _release)
+}
+
+func toNSString(str string) C.id {
+	cstr := C.CString(str)
+	defer C.free(unsafe.Pointer(cstr))
+
+	return C.objc_msgSend_str(_NSString,
+		_stringWithUTF8String,
+		cstr)
+}
+
+func fromNSString(str C.id) string {
+	cstr := C.objc_msgSend_noargs(str, _UTF8String)
+	return C.GoString((*C.char)(unsafe.Pointer(cstr)))
+}
+
+/*
+These are wrapper functions for the functions in bleh_darwin.m to wrap around stdint.h type casting.
+*/
+
 func objc_msgSend_rect(obj C.id, sel C.SEL, x int, y int, w int, h int) C.id {
 	return C._objc_msgSend_rect(obj, sel,
 		C.int64_t(x), C.int64_t(y), C.int64_t(w), C.int64_t(h))