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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| // Copyright 2024 The Gitea Authors. All rights reserved. | ||
| // SPDX-License-Identifier: MIT | ||
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| package zstd | ||
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| import "github.com/klauspost/compress/zstd" | ||
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| type WriterOption = zstd.EOption | ||
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| var ( | ||
| WithEncoderCRC = zstd.WithEncoderCRC | ||
| WithEncoderConcurrency = zstd.WithEncoderConcurrency | ||
| WithWindowSize = zstd.WithWindowSize | ||
| WithEncoderPadding = zstd.WithEncoderPadding | ||
| WithEncoderLevel = zstd.WithEncoderLevel | ||
| WithZeroFrames = zstd.WithZeroFrames | ||
| WithAllLitEntropyCompression = zstd.WithAllLitEntropyCompression | ||
| WithNoEntropyCompression = zstd.WithNoEntropyCompression | ||
| WithSingleSegment = zstd.WithSingleSegment | ||
| WithLowerEncoderMem = zstd.WithLowerEncoderMem | ||
| WithEncoderDict = zstd.WithEncoderDict | ||
| WithEncoderDictRaw = zstd.WithEncoderDictRaw | ||
| ) | ||
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| type ReaderOption = zstd.DOption | ||
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| var ( | ||
| WithDecoderLowmem = zstd.WithDecoderLowmem | ||
| WithDecoderConcurrency = zstd.WithDecoderConcurrency | ||
| WithDecoderMaxMemory = zstd.WithDecoderMaxMemory | ||
| WithDecoderDicts = zstd.WithDecoderDicts | ||
| WithDecoderDictRaw = zstd.WithDecoderDictRaw | ||
| WithDecoderMaxWindow = zstd.WithDecoderMaxWindow | ||
| WithDecodeAllCapLimit = zstd.WithDecodeAllCapLimit | ||
| WithDecodeBuffersBelow = zstd.WithDecodeBuffersBelow | ||
| IgnoreChecksum = zstd.IgnoreChecksum | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| // Copyright 2024 The Gitea Authors. All rights reserved. | ||
| // SPDX-License-Identifier: MIT | ||
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| package zstd | ||
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| import ( | ||
| "io" | ||
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| seekable "github.com/SaveTheRbtz/zstd-seekable-format-go/pkg" | ||
| "github.com/klauspost/compress/zstd" | ||
| ) | ||
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| type Writer zstd.Encoder | ||
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| var _ io.WriteCloser = (*Writer)(nil) | ||
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| func NewWriter(w io.Writer, opts ...WriterOption) (*Writer, error) { | ||
| zstdW, err := zstd.NewWriter(w, opts...) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return (*Writer)(zstdW), nil | ||
| } | ||
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| func (w *Writer) Write(p []byte) (int, error) { | ||
| return (*zstd.Encoder)(w).Write(p) | ||
| } | ||
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| func (w *Writer) Close() error { | ||
| return (*zstd.Encoder)(w).Close() | ||
| } | ||
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| type Reader zstd.Decoder | ||
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| var _ io.ReadCloser = (*Reader)(nil) | ||
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| func NewReader(r io.Reader, opts ...ReaderOption) (*Reader, error) { | ||
| zstdR, err := zstd.NewReader(r, opts...) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return (*Reader)(zstdR), nil | ||
| } | ||
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| func (r *Reader) Read(p []byte) (int, error) { | ||
| return (*zstd.Decoder)(r).Read(p) | ||
| } | ||
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| func (r *Reader) Close() error { | ||
| (*zstd.Decoder)(r).Close() // no error returned | ||
| return nil | ||
| } | ||
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| type SeekableWriter struct { | ||
| buf []byte | ||
| n int | ||
| w seekable.Writer | ||
| } | ||
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| var _ io.WriteCloser = (*SeekableWriter)(nil) | ||
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| func NewSeekableWriter(w io.Writer, blockSize int, opts ...WriterOption) (*SeekableWriter, error) { | ||
| zstdW, err := zstd.NewWriter(nil, opts...) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| seekableW, err := seekable.NewWriter(w, zstdW) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| return &SeekableWriter{ | ||
| buf: make([]byte, blockSize), | ||
| w: seekableW, | ||
| }, nil | ||
| } | ||
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| func (w *SeekableWriter) Write(p []byte) (int, error) { | ||
| written := 0 | ||
| for len(p) > 0 { | ||
| n := copy(w.buf[w.n:], p) | ||
| w.n += n | ||
| written += n | ||
| p = p[n:] | ||
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| if w.n == len(w.buf) { | ||
| if _, err := w.w.Write(w.buf); err != nil { | ||
| return written, err | ||
| } | ||
| w.n = 0 | ||
| } | ||
| } | ||
| return written, nil | ||
| } | ||
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| func (w *SeekableWriter) Close() error { | ||
| if w.n > 0 { | ||
| if _, err := w.w.Write(w.buf[:w.n]); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return w.w.Close() | ||
| } | ||
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| type SeekableReader seekable.Reader | ||
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| var _ io.ReadSeekCloser = (SeekableReader)(nil) | ||
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| func NewSeekableReader(r io.ReadSeeker, opts ...ReaderOption) (SeekableReader, error) { | ||
| zstdR, err := zstd.NewReader(nil, opts...) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| return seekable.NewReader(r, zstdR) | ||
| } |