+//===- llvm/Wrap.h - C++ Type Wrapping for the C Interface -----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the wrapping functions for the C interface.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm-c/Core.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Type.h"
+#include "llvm/PassRegistry.h"
+
+/* When included into a C++ source file, also declares 'wrap' and 'unwrap'
+ helpers to perform opaque reference<-->pointer conversions. These helpers
+ are shorter and more tightly typed than writing the casts by hand when
+ authoring bindings. In assert builds, they will do runtime type checking.
+
+ Need these includes to support the LLVM 'cast' template for the C++ 'wrap'
+ and 'unwrap' conversion functions. */
+
+namespace llvm {
+ class MemoryBuffer;
+ class PassManagerBase;
+ struct GenericValue;
+ class ExecutionEngine;
+
+ #define DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref) \
+ inline ty *unwrap(ref P) { \
+ return reinterpret_cast<ty*>(P); \
+ } \
+ \
+ inline ref wrap(const ty *P) { \
+ return reinterpret_cast<ref>(const_cast<ty*>(P)); \
+ }
+
+ #define DEFINE_ISA_CONVERSION_FUNCTIONS(ty, ref) \
+ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref) \
+ \
+ template<typename T> \
+ inline T *unwrap(ref P) { \
+ return cast<T>(unwrap(P)); \
+ }
+
+ #define DEFINE_STDCXX_CONVERSION_FUNCTIONS(ty, ref) \
+ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref) \
+ \
+ template<typename T> \
+ inline T *unwrap(ref P) { \
+ T *Q = (T*)unwrap(P); \
+ assert(Q && "Invalid cast!"); \
+ return Q; \
+ }
+
+ DEFINE_ISA_CONVERSION_FUNCTIONS (Type, LLVMTypeRef )
+ DEFINE_ISA_CONVERSION_FUNCTIONS (Value, LLVMValueRef )
+ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(Module, LLVMModuleRef )
+ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(BasicBlock, LLVMBasicBlockRef )
+ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(IRBuilder<>, LLVMBuilderRef )
+ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(MemoryBuffer, LLVMMemoryBufferRef )
+ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LLVMContext, LLVMContextRef )
+ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(Use, LLVMUseRef )
+ DEFINE_STDCXX_CONVERSION_FUNCTIONS(PassManagerBase, LLVMPassManagerRef )
+ DEFINE_STDCXX_CONVERSION_FUNCTIONS(PassRegistry, LLVMPassRegistryRef )
+
+ /* LLVMModuleProviderRef exists for historical reasons, but now just holds a
+ * Module.
+ */
+ inline Module *unwrap(LLVMModuleProviderRef MP) {
+ return reinterpret_cast<Module*>(MP);
+ }
+
+ /* Specialized opaque context conversions.
+ */
+ inline LLVMContext **unwrap(LLVMContextRef* Tys) {
+ return reinterpret_cast<LLVMContext**>(Tys);
+ }
+
+ inline LLVMContextRef *wrap(const LLVMContext **Tys) {
+ return reinterpret_cast<LLVMContextRef*>(const_cast<LLVMContext**>(Tys));
+ }
+
+ /* Specialized opaque type conversions.
+ */
+ inline Type **unwrap(LLVMTypeRef* Tys) {
+ return reinterpret_cast<Type**>(Tys);
+ }
+
+ inline LLVMTypeRef *wrap(Type **Tys) {
+ return reinterpret_cast<LLVMTypeRef*>(const_cast<Type**>(Tys));
+ }
+
+ /* Specialized opaque value conversions.
+ */
+ inline Value **unwrap(LLVMValueRef *Vals) {
+ return reinterpret_cast<Value**>(Vals);
+ }
+
+ template<typename T>
+ inline T **unwrap(LLVMValueRef *Vals, unsigned Length) {
+ #ifdef DEBUG
+ for (LLVMValueRef *I = Vals, *E = Vals + Length; I != E; ++I)
+ cast<T>(*I);
+ #endif
+ (void)Length;
+ return reinterpret_cast<T**>(Vals);
+ }
+
+ inline LLVMValueRef *wrap(const Value **Vals) {
+ return reinterpret_cast<LLVMValueRef*>(const_cast<Value**>(Vals));
+ }
+}
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