1package message

2

3import (

4 "strings"

5)

6

7// NeedsQuotedPrintable returns whether text, with crlf-separated lines, should be

8// encoded with quoted-printable, based on line lengths and any bare carriage

9// return or bare newline. If not, it can be included as 7bit or 8bit encoding in a

10// new message.

11func NeedsQuotedPrintable(text string) bool {

12 // ../rfc/2045:1025

13 for _, line := range strings.Split(text, "\r\n") {

14 // 78 should be fine too, qp itself has a requirement of 76 bytes on a line, but

15 // using qp for anything longer than 76 is safer.

16 if len(line) > 76 || strings.Contains(line, "\r") || strings.Contains(line, "\n") {

17 return true

18 }

19 }

20 return false

21}

22