mirror of
https://github.com/tsolomko/SWCompression.git
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Timofey Solomko
34 lines
721 B
Swift
34 lines
721 B
Swift
// Copyright (c) 2021 Timofey Solomko
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// Licensed under MIT License
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//
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// See LICENSE for license information
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import Foundation
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import BitByteData
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extension LittleEndianByteReader {
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func multiByteDecode() throws -> Int {
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var i = 1
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var result = self.byte().toInt()
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if result <= 127 {
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return result
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}
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result &= 0x7F
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while true {
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let byte = self.byte()
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if i >= 9 || byte == 0x00 {
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throw XZError.multiByteIntegerError
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}
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result += (byte.toInt() & 0x7F) << (7 * i)
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i += 1
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if byte & 0x80 == 0 {
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break
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}
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}
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return result
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}
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}
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