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8b94a14a78
- The naming prefix is LLVM.
- All types are represented using opaque references.
- Functions are not named LLVM{Type}{Method}; the names became
unreadable goop. Instead, they are named LLVM{ImperativeSentence}.
- Where an attribute only appears once in the class hierarchy (e.g.,
linkage only applies to values; parameter types only apply to
function types), the class is omitted from identifiers for
brevity. Tastes like methods.
- Strings are C strings or string/length tuples on a case-by-case
basis.
- APIs which give the caller ownership of an object are not mapped
(removeFromParent, certain constructor overloads). This keeps
keep memory management as simple as possible.
For each library with bindings:
llvm-c/<LIB>.h - Declares the bindings.
lib/<LIB>/<LIB>.cpp - Implements the bindings.
So just link with the library of your choice and use the C header
instead of the C++ one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42077 91177308-0d34-0410-b5e6-96231b3b80d8
95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
//===-- Support/CHelpers.h - Utilities for writing C bindings -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// These opaque reference<-->pointer conversions are shorter and more tightly
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// typed than writing the casts by hand in C bindings. In assert builds, they
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// will do type checking.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_CHELPERS_H
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#define LLVM_SUPPORT_CHELPERS_H
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#include "llvm/Module.h"
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#include "llvm/Type.h"
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#include "llvm/Value.h"
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typedef struct LLVMOpaqueModule *LLVMModuleRef;
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typedef struct LLVMOpaqueType *LLVMTypeRef;
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typedef struct LLVMOpaqueValue *LLVMValueRef;
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namespace llvm {
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/// Opaque module conversions
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///
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inline Module *unwrap(LLVMModuleRef M) {
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return reinterpret_cast<Module*>(M);
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}
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inline LLVMModuleRef wrap(Module *M) {
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return reinterpret_cast<LLVMModuleRef>(M);
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}
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/// Opaque type conversions
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///
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inline Type *unwrap(LLVMTypeRef Ty) {
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return reinterpret_cast<Type*>(Ty);
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}
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template<typename T>
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inline T *unwrap(LLVMTypeRef Ty) {
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return cast<T>(unwrap(Ty));
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}
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inline Type **unwrap(LLVMTypeRef* Tys) {
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return reinterpret_cast<Type**>(Tys);
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}
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inline LLVMTypeRef wrap(const Type *Ty) {
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return reinterpret_cast<LLVMTypeRef>(const_cast<Type*>(Ty));
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}
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inline LLVMTypeRef *wrap(const Type **Tys) {
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return reinterpret_cast<LLVMTypeRef*>(const_cast<Type**>(Tys));
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}
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/// Opaque value conversions
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///
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inline Value *unwrap(LLVMValueRef Val) {
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return reinterpret_cast<Value*>(Val);
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}
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template<typename T>
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inline T *unwrap(LLVMValueRef Val) {
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return cast<T>(unwrap(Val));
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}
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inline Value **unwrap(LLVMValueRef *Vals) {
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return reinterpret_cast<Value**>(Vals);
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}
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template<typename T>
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inline T **unwrap(LLVMValueRef *Vals, unsigned Length) {
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#if DEBUG
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for (LLVMValueRef *I = Vals, E = Vals + Length; I != E; ++I)
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cast<T>(*I);
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#endif
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return reinterpret_cast<T**>(Vals);
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}
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inline LLVMValueRef wrap(const Value *Val) {
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return reinterpret_cast<LLVMValueRef>(const_cast<Value*>(Val));
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}
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inline LLVMValueRef *wrap(const Value **Vals) {
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return reinterpret_cast<LLVMValueRef*>(const_cast<Value**>(Vals));
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}
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}
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#endif
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