You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: tzdata_vfsdata.go
    path of file: ./repos/rclone/backend/sharefile
    
    the code of the file until where you have to start completion: // Code generated by vfsgen; DO NOT EDIT.

//go:build !dev
// +build !dev

package sharefile

import (
	"bytes"
	"compress/gzip"
	"fmt"
	"io"
	"net/http"
	"os"
	pat
    
func (f *vfsgen۰CompressedFile) Seek(offset int64, whence int) (int64, error) {
	switch whence {
	case io.SeekStart:
		f.seekPos = 0 + offset
	case io.SeekCurrent:
		f.seekPos += offset
	case io.SeekEnd:
		f.seekPos = f.uncompressedSize + offset
	default:
		panic(fmt.Errorf("invalid whence value: %v", whence))
	}
	return f.seekPos, nil
}