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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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
*
* http://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 <stdlib.h>
#define array_copy(dest, src, count) \
do { \
STATIC_ASSERT(sizeof((dest)[0]) == sizeof((src)[0])); \
memcpy((dest), (src), sizeof((dest)[0]) * (count)); \
} while (false)
#define array_shift(array, dest, src) \
do { \
assert(src <= countof((array))); \
assert(dest <= countof((array))); \
memmove((array) + (dest), (array) + (src), \
sizeof((array)[0]) * (countof((array)) - MAX((src), (dest)))); \
} while (false)
#define array_insert(array, index, value) \
do { \
array_shift((array), (index) + 1, (index)); \
(array)[(index)] = (value); \
} while (false)
#define array_insert_overflow(array, index, value, overflow_value) \
do { \
if (index == countof((array))) { \
*overflow_value = value; \
} else { \
*overflow_value = (array)[countof((array)) - 1]; \
array_insert((array), (index), (value)); \
} \
} while (false)
#define array_clear_end(array, start) \
do { \
memset((array) + (start), 0, \
sizeof((array)[0]) * (countof((array)) - (start))); \
} while (false)
#define array_shift_down(array, dest, src) \
do { \
assert(src > dest); \
assert(src <= countof((array))); \
array_shift((array), (dest), (src)); \
array_clear_end((array), countof((array)) - ((src) - (dest))); \
} while (false)