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}
// Compress the data from the given io.Reader and write it to the given io.Writer
// I/O is buffered for better performance
func compress(output io.Writer, input io.Reader) int {
var (
err error
buffer *bufio.Writer = bufio.NewWriter(output)
compressor io.Writer = predictor.Compressor(buffer)
)
_, err = io.Copy(compressor, bufio.NewReader(input))
if err != nil {
fmt.Fprintln(os.Stderr, "Error while compressing.\n", err)
return 1
}
// Flush the compressor
_, err = compressor.Write(nil)
if err != nil {
fmt.Fprintln(os.Stderr, "Error while flushing compresssor buffer.\n", err)
return 1
}
// Flush the buffer
err = buffer.Flush()
if err != nil {
fmt.Fprintln(os.Stderr, "Error while flushing output buffer.\n", err)
return 1
}
return 0
}
// Decompress the data from the given io.Reader and write it to the given io.Writer
// I/O is buffered for better performance
func decompress(output io.Writer, input io.Reader) int {
var (
err error
buffer *bufio.Writer = bufio.NewWriter(output)
decompressor io.Reader = predictor.Decompressor(bufio.NewReader(input))
)
_, err = io.Copy(buffer, decompressor)
if err != nil {
fmt.Fprintln(os.Stderr, "Error while decompressing.\n", err)
return 1
}
// Flush
err = buffer.Flush()
if err != nil {
fmt.Fprintln(os.Stderr, "Error while flushing output buffer.\n", err)
return 1
}
return 0
}
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}
// Compress the data from the given io.Reader and write it to the given io.Writer
// I/O is buffered for better performance
func compress(output io.Writer, input io.Reader) int {
var (
err error
buffer io.Writer = iou.SizedWriter(output, 4096)
compressor io.Writer = predictor.Compressor(buffer)
)
_, err = io.Copy(compressor, input)
if err != nil {
fmt.Fprintln(os.Stderr, "Error while compressing.\n", err)
return 1
}
// Flush the compressor
_, err = compressor.Write(nil)
if err != nil {
fmt.Fprintln(os.Stderr, "Error while flushing compresssor buffer.\n", err)
return 1
}
// Flush the buffer
_, err = buffer.Write(nil)
if err != nil {
fmt.Fprintln(os.Stderr, "Error while flushing output buffer.\n", err)
return 1
}
return 0
}
// Decompress the data from the given io.Reader and write it to the given io.Writer
// I/O is buffered for better performance
func decompress(output io.Writer, input io.Reader) int {
var (
err error
buffer io.Writer = iou.SizedWriter(output, 4096)
decompressor io.Reader = predictor.Decompressor(bufio.NewReader(input))
)
_, err = io.Copy(buffer, decompressor)
if err != nil {
fmt.Fprintln(os.Stderr, "Error while decompressing.\n", err)
return 1
}
// Flush the buffer
_, err = buffer.Write(nil)
if err != nil {
fmt.Fprintln(os.Stderr, "Error while flushing output buffer.\n", err)
return 1
}
return 0
}
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