quiet "Complex regular subexpression recursion limit" warnings

[public-inbox.git] / lib / PublicInbox / MsgIter.pm

diff --git a/lib/PublicInbox/MsgIter.pm b/lib/PublicInbox/MsgIter.pm
index cdd78b39b2afaf75dea36062c40354afab2c1e18..fa25564a5db1042f6623ae838270920414fd12f2 100644 (file)
--- a/lib/PublicInbox/MsgIter.pm
+++ b/lib/PublicInbox/MsgIter.pm
@@ -1,4 +1,4 @@
-# Copyright (C) 2016-2019 all contributors <meta@public-inbox.org>
+# Copyright (C) 2016-2020 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # read-only utilities for Email::MIME
@@ -12,10 +12,11 @@ use PublicInbox::MIME;
 # Like Email::MIME::walk_parts, but this is:
 # * non-recursive
 # * passes depth and indices to the iterator callback
-sub msg_iter ($$;$) {
-       my ($mime, $cb, $cb_arg) = @_;
+sub msg_iter ($$;$$) {
+       my ($mime, $cb, $cb_arg, $do_undef) = @_;
        my @parts = $mime->subparts;
        if (@parts) {
+               $mime = $_[0] = undef if $do_undef; # saves some memory
                my $i = 0;
                @parts = map { [ $_, 1, ++$i ] } @parts;
                while (my $p = shift @parts) {
@@ -70,4 +71,14 @@ sub msg_part_text ($$) {
        ($s, $err);
 }
 
+# returns an array of quoted or unquoted sections
+sub split_quotes {
+       # Quiet "Complex regular subexpression recursion limit" warning
+       # in case an inconsiderate sender quotes 32K of text at once.
+       # The warning from Perl is harmless for us since our callers can
+       # tolerate less-than-ideal matches which work within Perl limits.
+       no warnings 'regexp';
+       split(/((?:^>[^\n]*\n)+)/sm, shift);
+}
+
 1;