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: bpsconv.go
    path of file: ./repos/hysteria/app/internal/utils
    
    the code of the file until where you have to start completion: package utils

import (
	"errors"
	"fmt"
	"strconv"
	"strings"
)

const (
	Byte     = 1
	Kilobyte = Byte * 1000
	Megabyte = Kilobyte * 1000
	Gigabyte = Megabyte * 1000
	Terabyte = Gigabyte * 1000
)

// StringToBps converts a string to a bandwidth value in bytes per second.
// E.g. "100 Mbps", "512 kbps"
    
func StringToBps(s string) (uint64, error) {
	s = strings.ToLower(strings.TrimSpace(s))
	spl := 0
	for i, c := range s {
		if c < '0' || c > '9' {
			spl = i
			break
		}
	}
	if spl == 0 {
		// No unit or no value
		return 0, errors.New("invalid format")
	}
	v, err := strconv.ParseUint(s[:spl], 10, 64)
	if err != nil {
		return 0, err
	}
	unit := strings.TrimSpace(s[spl:])

	switch strings.ToLower(unit) {
	case "b", "bps":
		return v * Byte / 8, nil
	case "k", "kb", "kbps":
		return v * Kilobyte / 8, nil
	case "m", "mb", "mbps":
		return v * Megabyte / 8, nil
	case "g", "gb", "gbps":
		return v * Gigabyte / 8, nil
	case "t", "tb", "tbps":
		return v * Terabyte / 8, nil
	default:
		return 0, errors.New("unsupported unit")
	}
}