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/*
* Copyright 2018 The Hafnium Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stddef.h>
#include <stdint.h>
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
int memcmp(const void *a, const void *b, size_t n);
int strcmp(const char *a, const char *b);
#define ctz(x) __builtin_ctz(x)
/* Compatibility with old compilers */
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
/**
* Check whether the value `v` is aligned to the boundary `a`,
* with `a` power of 2.
*/
#if __has_builtin(__builtin_is_aligned)
#define is_aligned(v, a) __builtin_is_aligned((v), (a))
#else
#define is_aligned(v, a) (((uintptr_t)(v) & (a - 1)) == 0)
#endif
/**
* Align up the value `v` to the boundary `a`, with `a` power of 2.
*/
#if __has_builtin(__builtin_align_up)
#define align_up(v, a) __builtin_align_up((v), (a))
#else
#define align_up(v, a) (((uintptr_t)(v) + (a - 1)) & ~(a - 1))
#endif
/**
* Align down the value `v` to the boundary `a`, with `a` power of 2.
*/
#if __has_builtin(__builtin_align_down)
#define align_down(v, a) __builtin_align_down((v), (a))
#else
#define align_down(v, a) ((uintptr_t)(v) & ~(a - 1))
#endif
#ifndef be16toh
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define be16toh(v) __builtin_bswap16(v)
#define be32toh(v) __builtin_bswap32(v)
#define be64toh(v) __builtin_bswap64(v)
#define htobe16(v) __builtin_bswap16(v)
#define htobe32(v) __builtin_bswap32(v)
#define htobe64(v) __builtin_bswap64(v)
#define le16toh(v) (v)
#define le32toh(v) (v)
#define le64toh(v) (v)
#define htole16(v) (v)
#define htole32(v) (v)
#define htole64(v) (v)
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define be16toh(v) (v)
#define be32toh(v) (v)
#define be64toh(v) (v)
#define htobe16(v) (v)
#define htobe32(v) (v)
#define htobe64(v) (v)
#define le16toh(v) __builtin_bswap16(v)
#define le32toh(v) __builtin_bswap32(v)
#define le64toh(v) __builtin_bswap64(v)
#define htole16(v) __builtin_bswap16(v)
#define htole32(v) __builtin_bswap32(v)
#define htole64(v) __builtin_bswap64(v)
#else
/*
* __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__ &&
* __BYTE_ORDER__ != __ORDER_BIG_ENDIAN__
*/
#error "Unsupported byte order"
#endif
#endif