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Started work on stateful decompression

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This commit is contained in:
Caleb J. Gardner
2026-03-20 01:55:00 -05:00
parent 6b5c830234
commit df22cf6529
5 changed files with 238 additions and 77 deletions
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src/decomp.zig
-74
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@@ -176,8 +176,6 @@ pub fn cLz4(alloc: std.mem.Allocator, in: []u8, out: []u8) anyerror!usize {
return error.Lz4DecompressFailed;
}
pub const zstdDecompress = if (!config.use_zig_decomp) cZstd else zigZstd;
pub fn zigZstd(alloc: std.mem.Allocator, in: []u8, out: []u8) anyerror!usize {
var rdr: Reader = .fixed(in);
const buf = try alloc.alloc(u8, 1024 * 1024);
@@ -187,75 +185,3 @@ pub fn zigZstd(alloc: std.mem.Allocator, in: []u8, out: []u8) anyerror!usize {
return decomp.err orelse err;
};
}
fn cZstd(alloc: std.mem.Allocator, in: []u8, out: []u8) anyerror!usize {
_ = alloc;
const res = c.ZSTD_decompress(out.ptr, out.len, in.ptr, in.len);
if (c.ZSTD_isError(res) == 0) return res;
return switch (c.ZSTD_getErrorCode(res)) {
c.ZSTD_error_prefix_unknown => cZstdError.PrefixUnknown,
c.ZSTD_error_version_unsupported => cZstdError.VersionUnsupported,
c.ZSTD_error_frameParameter_unsupported => cZstdError.FrameParameterUnsupported,
c.ZSTD_error_frameParameter_windowTooLarge => cZstdError.FrameParameterWindowTooLarge,
c.ZSTD_error_corruption_detected => cZstdError.CorruptionDetected,
c.ZSTD_error_checksum_wrong => cZstdError.ChecksumWrong,
c.ZSTD_error_literals_headerWrong => cZstdError.LiteralsHeaderWrong,
c.ZSTD_error_dictionary_corrupted => cZstdError.DictionaryCorrupted,
c.ZSTD_error_dictionary_wrong => cZstdError.DictionaryWrong,
c.ZSTD_error_dictionaryCreation_failed => cZstdError.DictionaryCreationFailed,
c.ZSTD_error_parameter_unsupported => cZstdError.ParameterUnsupported,
c.ZSTD_error_parameter_combination_unsupported => cZstdError.ParameterCombinationUnsupported,
c.ZSTD_error_parameter_outOfBound => cZstdError.ParameterOutOfBound,
c.ZSTD_error_tableLog_tooLarge => cZstdError.TableLogTooLarge,
c.ZSTD_error_maxSymbolValue_tooLarge => cZstdError.MaxSymbolValueTooLarge,
c.ZSTD_error_maxSymbolValue_tooSmall => cZstdError.MaxSymbolValueTooSmall,
c.ZSTD_error_stabilityCondition_notRespected => cZstdError.StabilityConditionNotRespected,
c.ZSTD_error_stage_wrong => cZstdError.StageWrong,
c.ZSTD_error_init_missing => cZstdError.InitMissing,
c.ZSTD_error_memory_allocation => cZstdError.MemoryAllocation,
c.ZSTD_error_workSpace_tooSmall => cZstdError.WorkSpaceTooSmall,
c.ZSTD_error_dstSize_tooSmall => cZstdError.DstSizeTooSmall,
c.ZSTD_error_srcSize_wrong => cZstdError.SrcSizeWrong,
c.ZSTD_error_dstBuffer_null => cZstdError.DstBufferNull,
c.ZSTD_error_noForwardProgress_destFull => cZstdError.NoForwardProgressDestFull,
c.ZSTD_error_noForwardProgress_inputEmpty => cZstdError.NoForwardProgressInputEmpty,
else => cZstdError.Generic,
};
}
pub const cZstdError = error{
Generic,
PrefixUnknown,
VersionUnsupported,
FrameParameterUnsupported,
FrameParameterWindowTooLarge,
CorruptionDetected,
ChecksumWrong,
LiteralsHeaderWrong,
DictionaryCorrupted,
DictionaryWrong,
DictionaryCreationFailed,
ParameterUnsupported,
ParameterCombinationUnsupported,
ParameterOutOfBound,
TableLogTooLarge,
MaxSymbolValueTooLarge,
MaxSymbolValueTooSmall,
CannotProduceUncompressedBlock,
StabilityConditionNotRespected,
StageWrong,
InitMissing,
MemoryAllocation,
WorkSpaceTooSmall,
DstSizeTooSmall,
SrcSizeWrong,
DstBufferNull,
NoForwardProgressDestFull,
NoForwardProgressInputEmpty,
FrameIndexTooLarge,
SeekableIo,
DstBufferWrong,
SrcBufferWrong,
SequenceProducerFailed,
ExternalSequencesInvalid,
MaxCode,
};