//
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// CryptoSwift
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//
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// Copyright (C) 2014-2022 Marcin Krzyżanowski <marcin@krzyzanowskim.com>
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// This software is provided 'as-is', without any express or implied warranty.
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//
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// In no event will the authors be held liable for any damages arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
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//
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// - The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation is required.
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// - Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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// - This notice may not be removed or altered from any source or binary distribution.
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//
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/// Array of bytes. Caution: don't use directly because generic is slow.
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///
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/// - parameter value: integer value
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/// - parameter length: length of output array. By default size of value type
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///
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/// - returns: Array of bytes
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@_specialize(where T == Int)
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@_specialize(where T == UInt)
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@_specialize(where T == UInt8)
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@_specialize(where T == UInt16)
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@_specialize(where T == UInt32)
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@_specialize(where T == UInt64)
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@inlinable
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func arrayOfBytes<T: FixedWidthInteger>(value: T, length totalBytes: Int = MemoryLayout<T>.size) -> Array<UInt8> {
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let valuePointer = UnsafeMutablePointer<T>.allocate(capacity: 1)
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valuePointer.pointee = value
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let bytesPointer = UnsafeMutablePointer<UInt8>(OpaquePointer(valuePointer))
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var bytes = Array<UInt8>(repeating: 0, count: totalBytes)
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for j in 0..<min(MemoryLayout<T>.size, totalBytes) {
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bytes[totalBytes - 1 - j] = (bytesPointer + j).pointee
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}
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valuePointer.deinitialize(count: 1)
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valuePointer.deallocate()
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return bytes
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}
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