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Add lz4.AppendOption for NewWriter #199

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Add lz4.AppendOption for NewWriter #199

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17 changes: 17 additions & 0 deletions options.go
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,23 @@ func ChecksumOption(flag bool) Option {
}
}

// AppendOption if appendToLz4File = true ,then will not write header
func AppendOption(appendToLz4File bool) Option {
return func(a applier) error {
switch w := a.(type) {
case nil:
s := fmt.Sprintf("AppendOption(%v)", appendToLz4File)
return lz4errors.Error(s)
case *Writer:
if appendToLz4File {
w.frame.Descriptor.Checksum = 1
}
return nil
}
return lz4errors.ErrOptionNotApplicable
}
}

// SizeOption sets the size of the original uncompressed data (default=0). It is useful to know the size of the
// whole uncompressed data stream.
func SizeOption(size uint64) Option {
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