--- /dev/null
+//===-- Support/CHelpers.h - Utilities for writing C bindings -------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These opaque reference<-->pointer conversions are shorter and more tightly
+// typed than writing the casts by hand in C bindings. In assert builds, they
+// will do type checking.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_CHELPERS_H
+#define LLVM_SUPPORT_CHELPERS_H
+
+#include "llvm/Module.h"
+#include "llvm/Type.h"
+#include "llvm/Value.h"
+
+typedef struct LLVMOpaqueModule *LLVMModuleRef;
+typedef struct LLVMOpaqueType *LLVMTypeRef;
+typedef struct LLVMOpaqueValue *LLVMValueRef;
+
+namespace llvm {
+ /// Opaque module conversions
+ ///
+ inline Module *unwrap(LLVMModuleRef M) {
+ return reinterpret_cast<Module*>(M);
+ }
+
+ inline LLVMModuleRef wrap(Module *M) {
+ return reinterpret_cast<LLVMModuleRef>(M);
+ }
+
+ /// Opaque type conversions
+ ///
+ inline Type *unwrap(LLVMTypeRef Ty) {
+ return reinterpret_cast<Type*>(Ty);
+ }
+
+ template<typename T>
+ inline T *unwrap(LLVMTypeRef Ty) {
+ return cast<T>(unwrap(Ty));
+ }
+
+ inline Type **unwrap(LLVMTypeRef* Tys) {
+ return reinterpret_cast<Type**>(Tys);
+ }
+
+ inline LLVMTypeRef wrap(const Type *Ty) {
+ return reinterpret_cast<LLVMTypeRef>(const_cast<Type*>(Ty));
+ }
+
+ inline LLVMTypeRef *wrap(const Type **Tys) {
+ return reinterpret_cast<LLVMTypeRef*>(const_cast<Type**>(Tys));
+ }
+
+ /// Opaque value conversions
+ ///
+ inline Value *unwrap(LLVMValueRef Val) {
+ return reinterpret_cast<Value*>(Val);
+ }
+
+ template<typename T>
+ inline T *unwrap(LLVMValueRef Val) {
+ return cast<T>(unwrap(Val));
+ }
+
+ inline Value **unwrap(LLVMValueRef *Vals) {
+ return reinterpret_cast<Value**>(Vals);
+ }
+
+ template<typename T>
+ inline T **unwrap(LLVMValueRef *Vals, unsigned Length) {
+ #if DEBUG
+ for (LLVMValueRef *I = Vals, E = Vals + Length; I != E; ++I)
+ cast<T>(*I);
+ #endif
+ return reinterpret_cast<T**>(Vals);
+ }
+
+ inline LLVMValueRef wrap(const Value *Val) {
+ return reinterpret_cast<LLVMValueRef>(const_cast<Value*>(Val));
+ }
+
+ inline LLVMValueRef *wrap(const Value **Vals) {
+ return reinterpret_cast<LLVMValueRef*>(const_cast<Value**>(Vals));
+ }
+
+ /// Basic block conversions
+ ///
+ inline BasicBlock *unwrap(LLVMBasicBlockRef BBRef) {
+ return reinterpret_cast<BasicBlock*>(BBRef);
+ }
+
+ inline LLVMBasicBlockRef wrap(const BasicBlock *BB) {
+ return reinterpret_cast<LLVMBasicBlockRef>(const_cast<BasicBlock*>(BB));
+ }
+}
+
+#endif