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[TAR] truncatingIfNeeded optimizations for TarEntryInfo.init

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Timofey Solomko
2018-07-13 22:55:40 +03:00
parent 29ad403776
commit fe81ff1341
1 changed files with 3 additions and 3 deletions
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Sources/TAR/TarEntryInfo.swift
+3 -3
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@@ -151,12 +151,12 @@ public struct TarEntryInfo: ContainerEntryInfo {
// Some implementations treat bytes as signed integers, but some don't.
// So we check both cases, coincedence in one of them will pass the checksum test.
let unsignedOurChecksumArray = headerDataForChecksum.map { UInt($0) }
let signedOurChecksumArray = headerDataForChecksum.map { Int($0) }
let unsignedOurChecksumArray = headerDataForChecksum.map { UInt(truncatingIfNeeded: $0) }
let signedOurChecksumArray = headerDataForChecksum.map { $0.toInt() }
let unsignedOurChecksum = unsignedOurChecksumArray.reduce(0) { $0 + $1 }
let signedOurChecksum = signedOurChecksumArray.reduce(0) { $0 + $1 }
guard unsignedOurChecksum == UInt(checksum) || signedOurChecksum == checksum
guard unsignedOurChecksum == UInt(truncatingIfNeeded: checksum) || signedOurChecksum == checksum
else { throw TarError.wrongHeaderChecksum }
// File type