From 073db271c509507a48dfe350ce48605e152652e4 Mon Sep 17 00:00:00 2001
From: Francois Perrad <francois.perrad@gadz.org>
Date: Sun, 29 Mar 2009 19:07:28 +0200
Subject: [PATCH] use a random when encode email address

---
 src/Compiler.pir | 23 +++++++++++++++++++----
 t/30-autolink.t  |  2 +-
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/src/Compiler.pir b/src/Compiler.pir
index 6bcd7f5..fd456e4 100644
--- a/src/Compiler.pir
+++ b/src/Compiler.pir
@@ -16,6 +16,8 @@ Markdown::HTML::Compiler implements a compiler for MAST nodes.
 .namespace ['Markdown'; 'HTML'; 'Compiler']
 
 .sub '__onload' :anon :load :init
+    load_bytecode 'Math/Rand.pbc'
+
     $P0 = get_hll_global 'P6metaclass'
     $P0 = $P0.'new_class'('Markdown::HTML::Compiler')
 
@@ -84,13 +86,26 @@ Markdown::HTML::Compiler implements a compiler for MAST nodes.
   L1:
     unless $P0 goto L2
     $S1 = shift $P0
-    unless $S1 == ':' goto L3
-    $S0 .= $S1
-    goto L1
-  L3:
+    if $S1 == '@' goto L_dec
+    if $S1 == ':' goto L_raw
+    .local pmc rand
+    rand = get_hll_global [ 'Math'; 'Rand' ], 'rand'
+    $I0 = rand()
+    # roughly 10% raw, 45% hex, 45% dec
+    $I0 %= 20
+    if $I0 >= 18 goto L_raw
+    if $I0 >= 9 goto L_hex
+  L_dec:
+    $I1 = ord $S1
+    $S1 = $I1
+    $S1 = '&#' . $S1
+    $S1 .= ';'
+    goto L_raw
+  L_hex:
     $I1 = ord $S1
     $P1[0] = $I1
     $S1 = sprintf '&#x%X;', $P1
+  L_raw:
     $S0 .= $S1
     goto L1
   L2:
diff --git a/t/30-autolink.t b/t/30-autolink.t
index 279f973..77684eb 100644
--- a/t/30-autolink.t
+++ b/t/30-autolink.t
@@ -31,7 +31,7 @@ language_output_is( 'markdown', <<'CODE', <<'OUT', 'autolink email' );
 <somebbob@example.com>
 
 CODE
-<p><a href="&#x6D;&#x61;&#x69;&#x6C;&#x74;&#x6F;:&#x73;&#x6F;&#x6D;&#x65;&#x62;&#x62;&#x6F;&#x62;&#x40;&#x65;&#x78;&#x61;&#x6D;&#x70;&#x6C;&#x65;&#x2E;&#x63;&#x6F;&#x6D;">&#x73;&#x6F;&#x6D;&#x65;&#x62;&#x62;&#x6F;&#x62;&#x40;&#x65;&#x78;&#x61;&#x6D;&#x70;&#x6C;&#x65;&#x2E;&#x63;&#x6F;&#x6D;</a></p>
+<p><a href="ma&#x69;&#x6C;&#x74;&#111;:&#x73;o&#x6D;&#101;&#x62;&#98;&#111;&#98;&#64;&#101;&#120;&#x61;&#109;&#x70;&#108;&#101;.&#x63;&#x6F;&#109;">&#x73;o&#x6D;&#101;&#x62;&#98;&#111;&#98;&#64;&#101;&#120;&#x61;&#109;&#x70;&#108;&#101;.&#x63;&#x6F;&#109;</a></p>
 OUT