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https://github.com/tsolomko/SWCompression.git
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Timofey Solomko
45 lines
1.8 KiB
Swift
45 lines
1.8 KiB
Swift
// Copyright (c) 2026 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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/**
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Represents an error which happened during BZip2 decompression.
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It may indicate that either data is damaged or it might not be compressed with BZip2 at all.
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*/
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public enum BZip2Error: Error {
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/// 'Magic' number is not 0x425a.
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case wrongMagic
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/// BZip version is not 2.
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case wrongVersion
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/// Unsupported block size (not from '0' to '9').
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case wrongBlockSize
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/// Unsupported block type (is neither 'pi' nor 'sqrt(pi)').
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case wrongBlockType
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/// Block is randomized.
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case randomizedBlock
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/// Wrong number of Huffman tables/groups (should be between 2 and 6).
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case wrongHuffmanGroups
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/// Selector is greater than the total number of Huffman tables/groups.
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case wrongSelector
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/// Wrong length of Huffman code (should be between 0 and 20).
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case wrongHuffmanCodeLength
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/// Symbol wasn't found in Huffman tree.
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case symbolNotFound
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/**
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Computed checksum of the uncompressed data does not match the value stored in the archive.
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Associated value contains the data that were successfully decompressed up to the point where the mismatch was
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detected.
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- When using `BZip2.decompress(data:)`: The associated value comes from a single BZip2 archive. If the mismatch
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happens at the final checksum verification, this is usually the entire decompressed output.
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- When using `BZip2.multiDecompress(data:)`: The input may contain several concatenated BZip2 archives. The error
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is thrown for the current archive that fails the checksum. The associated value contains only the data decompressed
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for that archive. Results from earlier archives are not included and are not returned once this error is thrown.
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*/
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case wrongCRC(Data)
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}
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