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From: Andrew Whatson <>
Cc: Andrew Whatson <>
Subject: [PATCH] email: Support quoted-printable CR LF sequences.
Date: Tue,  3 Jan 2023 22:19:42 +1000	[thread overview]
Message-ID: <> (raw)

* email/quoted-printable.scm (quoted-printable-decode): Ignore "=\r\n"
sequences in the input.
* tests/quoted-printable.scm ("quoted-printable decoding of soft line
breaks (=\\n)", "quoted-printable decoding of soft line
breaks (=\\r\\n)"): New tests.
 email/quoted-printable.scm | 5 +++--
 tests/quoted-printable.scm | 6 ++++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/email/quoted-printable.scm b/email/quoted-printable.scm
index 2c5d7a7..9d71200 100644
--- a/email/quoted-printable.scm
+++ b/email/quoted-printable.scm
@@ -41,11 +41,12 @@
         ((eof-object? c) out)
         ((char=? c #\=)
-         ;; TODO: Support "\r\n" line ending
          (let ((c1 (read-char in)))
            (unless (char=? c1 #\Newline)
              (let ((c2 (read-char in)))
-               (put-u8 out (string->number (string c1 c2) 16)))))
+               (unless (and (char=? c1 #\Return)
+                            (char=? c2 #\Newline))
+                 (put-u8 out (string->number (string c1 c2) 16))))))
          (quoted-printable-decode in out))
         (else (put-u8 out (char->integer c))
               (quoted-printable-decode in out)))))))
diff --git a/tests/quoted-printable.scm b/tests/quoted-printable.scm
index bfbd985..2a1f068 100644
--- a/tests/quoted-printable.scm
+++ b/tests/quoted-printable.scm
@@ -67,6 +67,12 @@ abriquent pour te la vendre une =C3=A2me vulgaire.")
    (quoted-printable-escape-encode-char #\return)
    (quoted-printable-escape-encode-char #\newline)))
+(test-equal "quoted-printable decoding of soft line breaks (=\\n)"
+  (quoted-printable-decode "=\n") #vu8())
+(test-equal "quoted-printable decoding of soft line breaks (=\\r\\n)"
+  (quoted-printable-decode "=\r\n") #vu8())
 (test-assert "quoted-printable random bytevector: quoted-printable-encode and quoted-printable-decode are inverses of each other"
   (every (lambda (len)
            (let ((x (random-bytevector len)))

             reply	other threads:[~2023-01-03 12:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-03 12:19 Andrew Whatson [this message]
2023-01-03 14:21 ` Arun Isaac
2023-01-04 10:24   ` Andrew Whatson
2023-01-05  0:03     ` Arun Isaac

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