//
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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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#if canImport(Darwin)
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import Darwin
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#elseif canImport(Glibc)
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import Glibc
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#elseif canImport(ucrt)
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import ucrt
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#endif
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protocol _UInt32Type {}
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extension UInt32: _UInt32Type {}
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/** array of bytes */
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extension UInt32 {
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@_specialize(where T == ArraySlice<UInt8>)
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init<T: Collection>(bytes: T) where T.Element == UInt8, T.Index == Int {
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self = UInt32(bytes: bytes, fromIndex: bytes.startIndex)
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}
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@_specialize(where T == ArraySlice<UInt8>)
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@inlinable
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init<T: Collection>(bytes: T, fromIndex index: T.Index) where T.Element == UInt8, T.Index == Int {
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if bytes.isEmpty {
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self = 0
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return
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}
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let count = bytes.count
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let val0 = count > 0 ? UInt32(bytes[index.advanced(by: 0)]) << 24 : 0
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let val1 = count > 1 ? UInt32(bytes[index.advanced(by: 1)]) << 16 : 0
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let val2 = count > 2 ? UInt32(bytes[index.advanced(by: 2)]) << 8 : 0
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let val3 = count > 3 ? UInt32(bytes[index.advanced(by: 3)]) : 0
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self = val0 | val1 | val2 | val3
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}
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}
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