FEAT: quoted-printable codec with special space/no-space options

Author: Oldes

src/mezz/codec-quoted-printable.reb

@@ -19,20 +19,27 @@ register-codec [
 	decode: function [
 		"Decodes quoted-printable data"
 		data [binary! any-string!]
+		/space
 	][
 		output: either binary? data [ copy data ][ to binary! data ]
 		; remove soft line breaks
 		parse output [any [to #"=" remove [#"=" [LF | CR LF]] | skip] to end]
-		to data dehex/escape output #"="
+		to data either space [
+			dehex/escape/uri output #"="
+		][	dehex/escape     output #"="]
 	]
 
 	encode: function/with [
 		"Encodes data using quoted-printable encoding"
 		data [binary! any-string!]
+		/no-space "Q-encoding - space may not be represented directly"
 	][
-		output: enhex/escape/except to binary! data #"=" :quoted-printable
 		assert [number? :max-line-length]
 
+		output: either no-space [
+			enhex/escape/except/uri to binary! data #"=" :quoted-printable
+		][	enhex/escape/except     to binary! data #"=" :quoted-printable]
+
 		if 0 < length: to integer! max-line-length - 1 [
 			; limit line length to 76 chars
 			parse output [any [

src/tests/units/codecs-test.r3

@@ -580,6 +580,8 @@ if find codecs 'html-entities [
 try [import 'quoted-printable]
 if find codecs 'quoted-printable [
 	was-length: :codecs/quoted-printable/max-line-length
+	qp-encode: :codecs/quoted-printable/encode
+	qp-decode: :codecs/quoted-printable/decode
 	===start-group=== "Quoted-Printable codec"
 	--test-- "encode Quoted-Printable"
 		--assert (encode 'quoted-printable "Holčička") == "Hol=C4=8Di=C4=8Dka"
@@ -603,21 +605,29 @@ s te fabriquent pour te la vendre une =C3=A2me vulgaire.^M
    		text-expected: {J'interdis aux marchands de vanter trop leurs marchandises. Car ils se font vite pédagogues et t'enseignent comme but ce qui n'est par essence qu'un moyen, et te trompant ainsi sur la route à suivre les voilà bientôt qui te dégradent, car si leur musique est vulgaire ils te fabriquent pour te la vendre une âme vulgaire.^M
    — Antoine de Saint-Exupéry, Citadelle (1948)}
 
-		--assert text-expected == decode 'quoted-printable text-encoded  
-		--assert text-expected == decode 'quoted-printable encode 'quoted-printable text-expected
-		
+		--assert text-expected == qp-decode text-encoded  
+		--assert text-expected == qp-decode qp-encode text-expected
+
 	--test-- "encode with line length limit"
 		codecs/quoted-printable/max-line-length: 4
-		--assert "a" = encode 'quoted-printable "a"
-		--assert "ab" = encode 'quoted-printable "ab"
-		--assert "abc" = encode 'quoted-printable "abc"
-		--assert "abcd" = encode 'quoted-printable "abcd"
-		--assert "abc=^M^/de" = encode 'quoted-printable "abcde"
-		--assert "abc=^M^/def" = encode 'quoted-printable "abcdef"
-		--assert "abc=^M^/defg" = encode 'quoted-printable "abcdefg"
+		--assert "a" = qp-encode "a"
+		--assert "ab" = qp-encode "ab"
+		--assert "abc" = qp-encode "abc"
+		--assert "abcd" = qp-encode "abcd"
+		--assert "abc=^M^/de" = qp-encode "abcde"
+		--assert "abc=^M^/def" = qp-encode "abcdef"
+		--assert "abc=^M^/defg" = qp-encode "abcdefg"
+
+	--test-- "quoted-encode with spaces"
+		--assert "a b" = qp-encode "a b"
+		--assert "a_b" = qp-encode/no-space "a b"
+		--assert "a_b" = qp-decode "a_b"
+		--assert "a b" = qp-decode/space "a_b"
 
 	===end-group===
 	codecs/quoted-printable/max-line-length: :was-length
+	unset 'qp-encode
+	unset 'qp-decode
 ]