According to rfc2047, an encoded word has the following form:
encoded-word = "=?" charset "?" encoding "?" encoded-text "?="
charset = token
encoding = token
token = <Any CHAR except SPACE, CTLs, and especials>
especials = "(" / ")" / "<" / ">" / "@" / "," / ";" / ":" / "
<"> / "/" / "[" / "]" / "?" / "." / "="
encoded-text = <Any printable ASCII character other than "?"
or SPACE>
And rfc822 defines CHARs and CTLs as:
CHAR = <any ASCII character> ; ( 0-177, 0.-127.)
CTL = <any ASCII control ; ( 0- 37, 0.- 31.)
character and DEL> ; ( 177, 127.)
The original code only detected rfc2047 encoded strings when the charset
was UTF-8. This patch generalizes the matching expression and breaks the
check for an rfc2047 encoded string into its own function. There's no real
functional change, since any properly rfc2047 encoded string would have
fallen through the remaining 'if' statements and been returned unchanged.
Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
return $_;
}
+sub is_rfc2047_quoted {
+ my $s = shift;
+ my $token = '[^][()<>@,;:"\/?.= \000-\037\177-\377]+';
+ my $encoded_text = '[!->@-~]+';
+ length($s) <= 75 &&
+ $s =~ m/^(?:"[[:ascii:]]*"|=\?$token\?$token\?$encoded_text\?=)$/o;
+}
+
# use the simplest quoting being able to handle the recipient
sub sanitize_address
{
}
# if recipient_name is already quoted, do nothing
- if ($recipient_name =~ /^("[[:ascii:]]*"|=\?utf-8\?q\?.*\?=)$/) {
+ if (is_rfc2047_quoted($recipient_name)) {
return $recipient;
}