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// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SRC_GRAPHICS_LIB_COMPUTE_COMMON_MACROS_H_
#define SRC_GRAPHICS_LIB_COMPUTE_COMMON_MACROS_H_
//
//
//
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
//
// clang-format off
//
#define ARRAY_LENGTH_MACRO(x_) (sizeof(x_)/sizeof(x_[0]))
#define OFFSETOF_MACRO(t_,m_) offsetof(t_,m_)
#define MEMBER_SIZE_MACRO(t_,m_) sizeof(((t_*)0)->m_)
//
// FIXME(allanmac):
//
// Consider providing typed min/max() functions:
//
// <type> [min|max]_<type>(a,b) { ; }
//
// But note we still need preprocessor-time min/max().
//
#define MAX_MACRO(t_,a_,b_) (((a_) > (b_)) ? (a_) : (b_))
#define MIN_MACRO(t_,a_,b_) (((a_) < (b_)) ? (a_) : (b_))
//
//
//
#define BITS_TO_MASK_MACRO(n_) (((uint32_t)1<<(n_))-1)
#define BITS_TO_MASK_64_MACRO(n_) (((uint64_t)1<<(n_))-1)
#define BITS_TO_MASK_AT_MACRO(n_,b_) (BITS_TO_MASK_MACRO(n_) <<(b_))
#define BITS_TO_MASK_AT_64_MACRO(n_,b_) (BITS_TO_MASK_64_MACRO(n_)<<(b_))
//
//
//
#define STRINGIFY_MACRO_2(a_) #a_
#define STRINGIFY_MACRO(a_) STRINGIFY_MACRO_2(a_)
//
//
//
#define CONCAT_MACRO_2(a_,b_) a_ ## b_
#define CONCAT_MACRO(a_,b_) CONCAT_MACRO_2(a_,b_)
//
// Round up/down
//
#define ROUND_DOWN_MACRO(v_,q_) (((v_) / (q_)) * (q_))
#define ROUND_UP_MACRO(v_,q_) ((((v_) + (q_) - 1) / (q_)) * (q_))
//
// Round up/down when q is a power-of-two.
//
#define ROUND_DOWN_POW2_MACRO(v_,q_) ((v_) & ~((q_) - 1))
#define ROUND_UP_POW2_MACRO(v_,q_) ROUND_DOWN_POW2_MACRO((v_) + (q_) - 1, q_)
//
//
//
#if defined (_MSC_VER) && !defined (__clang__)
#define STATIC_ASSERT_MACRO(c_,m_) static_assert(c_,m_)
#else
#define STATIC_ASSERT_MACRO(c_,m_) _Static_assert(c_,m_)
#endif
#define STATIC_ASSERT_MACRO_1(c_) STATIC_ASSERT_MACRO(c_,#c_)
//
//
//
#if defined (_MSC_VER) && !defined (__clang__)
#define POPCOUNT_MACRO(...) __popcnt(__VA_ARGS__)
#else
#define POPCOUNT_MACRO(...) __builtin_popcount(__VA_ARGS__)
#endif
//
//
//
#if defined (_MSC_VER) && !defined (__clang__)
#define ALIGN_MACRO(bytes_) __declspec(align(bytes_)) // only accepts integer as arg
#else
#include <stdalign.h>
#define ALIGN_MACRO(bytes_) alignas(bytes_)
#endif
//
// clang-format on
//
#endif // SRC_GRAPHICS_LIB_COMPUTE_COMMON_MACROS_H_
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