// Package predictor implements the predictor compression/decompression algorithm
// as specified by RFC1978 - PPP Predictor Compression Protocol
package predictor

import (
	bits "0dev.org/bits"
	iou "0dev.org/ioutil"
	"io"
)

type context struct {
	table [1 << 16]byte
	input []byte
	hash  uint16

		return nil
	}

	return write
}

// A function type alias so that it can have methods attached to it
type decompressor func([]byte) (int, error)

// Required to implement io.Reader
func (r decompressor) Read(output []byte) (int, error) {
	return r(output)
}

// Returns an io.Reader implementation that wraps the provided io.Reader
// and decompresses data according to the predictor algorithm
func Decompressor(reader io.Reader) io.Reader {
	var ctx context
	ctx.input = make([]byte, 0, 8)

	return decompressor(func(output []byte) (int, error) {
	return iou.ReaderFunc(func(output []byte) (int, error) {
		var (
			err               error
			flags, predicted  byte
			rc, total, copied int
		)

		// Sanity check for space to read into