llvm/libc/src/__support/arg_list.h

//===-- Holder Class for manipulating va_lists ------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIBC_SRC___SUPPORT_ARG_LIST_H
#define LLVM_LIBC_SRC___SUPPORT_ARG_LIST_H

#include "src/__support/common.h"
#include "src/__support/macros/config.h"

#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>

namespace LIBC_NAMESPACE_DECL {
namespace internal {

template <typename V, typename A>
LIBC_INLINE constexpr V align_up(V val, A align) { … }

class ArgList { … };

// Used for testing things that use an ArgList when it's impossible to know what
// the arguments should be ahead of time. An example of this would be fuzzing,
// since a function passed a random input could request unpredictable arguments.
class MockArgList { … };

// Used by the GPU implementation to parse how many bytes need to be read from
// the variadic argument buffer.
template <bool packed> class DummyArgList { … };

// Used for the GPU implementation of `printf`. This models a variadic list as a
// simple array of pointers that are built manually by the implementation.
template <bool packed> class StructArgList { … };

} // namespace internal
} // namespace LIBC_NAMESPACE_DECL

#endif // LLVM_LIBC_SRC___SUPPORT_ARG_LIST_H