From 10f76823b8c71ecc84f51bf9f93514d6d25a4a77 Mon Sep 17 00:00:00 2001
From: Richard Carlsson <richardc@klarna.com>
Date: Thu, 18 Aug 2011 14:32:36 +0200
Subject: URI-escape bytes as two hex digits always (reported by Alfonso De
 Gregorio)

---
 lib/edoc/src/edoc_lib.erl | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

(limited to 'lib/edoc/src')

diff --git a/lib/edoc/src/edoc_lib.erl b/lib/edoc/src/edoc_lib.erl
index df929ebf04..7fd8358add 100644
--- a/lib/edoc/src/edoc_lib.erl
+++ b/lib/edoc/src/edoc_lib.erl
@@ -403,8 +403,13 @@ escape_uri([C | Cs]) ->
 escape_uri([]) ->
     [].
 
-escape_byte(C) ->
-    "%" ++ hex_octet(C).
+escape_byte(C) when C >= 0, C =< 255 ->
+    [$%, hex_digit(C bsr 4), hex_digit(C band 15)].
+
+hex_digit(N) when N >= 0, N =< 9 ->
+    N + $0;
+hex_digit(N) when N > 9, N =< 15 ->
+    N + $a - 10.
 
 % utf8([C | Cs]) when C > 16#7f ->
 %     [((C band 16#c0) bsr 6) + 16#c0, C band 16#3f ++ 16#80 | utf8(Cs)];
@@ -413,13 +418,6 @@ escape_byte(C) ->
 % utf8([]) ->
 %     [].
 
-hex_octet(N) when N =< 9 ->
-    [$0 + N];
-hex_octet(N) when N > 15 ->
-    hex_octet(N bsr 4) ++ hex_octet(N band 15);
-hex_octet(N) ->
-    [N - 10 + $a].
-
 %% Please note that URI are *not* file names. Don't use the stdlib
 %% 'filename' module for operations on (any parts of) URI.
 
-- 
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