chromium/third_party/skia/include/private/base/SkSafe32.h

/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkSafe32_DEFINED
#define SkSafe32_DEFINED

#include "include/private/base/SkAssert.h"
#include "include/private/base/SkMath.h"

#include <cstdint>

static constexpr int32_t Sk64_pin_to_s32(int64_t x) { … }

static constexpr int32_t Sk32_sat_add(int32_t a, int32_t b) { … }

static constexpr int32_t Sk32_sat_sub(int32_t a, int32_t b) { … }

// To avoid UBSAN complaints about 2's compliment overflows
//
static constexpr int32_t Sk32_can_overflow_add(int32_t a, int32_t b) { … }
static constexpr int32_t Sk32_can_overflow_sub(int32_t a, int32_t b) { … }

/**
 * This is a 'safe' abs for 32-bit integers that asserts when undefined behavior would occur.
 * SkTAbs (in SkTemplates.h) is a general purpose absolute-value function.
 */
static inline int32_t SkAbs32(int32_t value) { … }

#endif