From 337bf3b64c04dd0da174a912a0f39b8b0c72e66c Mon Sep 17 00:00:00 2001
From: Akira Kakuto <kakuto@fuk.kindai.ac.jp>
Date: Wed, 17 Dec 2014 04:47:58 +0000
Subject: web2c/luatexdir: Sync with the upstream.

git-svn-id: svn://tug.org/texlive/trunk@35848 c570f23f-e606-0410-a88d-b1316a301751
---
 Build/source/texk/web2c/luatexdir/ChangeLog      |  5 +++
 Build/source/texk/web2c/luatexdir/tex/texnodes.w | 45 +++++++++++++++++++-----
 2 files changed, 41 insertions(+), 9 deletions(-)

(limited to 'Build/source/texk/web2c')

diff --git a/Build/source/texk/web2c/luatexdir/ChangeLog b/Build/source/texk/web2c/luatexdir/ChangeLog
index ecf25ff2947..228955a9e06 100644
--- a/Build/source/texk/web2c/luatexdir/ChangeLog
+++ b/Build/source/texk/web2c/luatexdir/ChangeLog
@@ -1,3 +1,8 @@
+2014-12-17  Akira Kakuto  <kakuto@fuk.kindai.ac.jp>
+
+	* tex/texnodes.w: Sync with the upstream.
+	Luigi fixes a bug on cached attributes.
+
 2014-12-12  Peter Breitenlohner  <peb@mppmu.mpg.de>
 
 	Avoid implicit function declarations.
diff --git a/Build/source/texk/web2c/luatexdir/tex/texnodes.w b/Build/source/texk/web2c/luatexdir/tex/texnodes.w
index e5c4e1cacfd..411deb9af5c 100644
--- a/Build/source/texk/web2c/luatexdir/tex/texnodes.w
+++ b/Build/source/texk/web2c/luatexdir/tex/texnodes.w
@@ -19,7 +19,7 @@
 
 @ @c
 static const char _svn_version[] =
-    "$Id: texnodes.w 4911 2014-03-20 14:00:02Z luigi $"
+    "$Id: texnodes.w 5106 2014-12-17 01:54:37Z luigi $"
     "$URL: https://foundry.supelec.fr/svn/luatex/trunk/source/texk/web2c/luatexdir/tex/texnodes.w $";
 
 #include "ptexlib.h"
@@ -2276,8 +2276,10 @@ void set_attribute(halfword n, int i, int val)
 {
     register halfword p;
     register int j = 0;
+    /* not all nodes can have an attribute list */
     if (!nodetype_has_attributes(type(n)))
         return;
+    /* if we have no list, we create one and quit */
     p = node_attr(n);
     if (p == null) {            /* add a new head \& node */
         p = get_node(attribute_node_size);
@@ -2288,6 +2290,7 @@ void set_attribute(halfword n, int i, int val)
         vlink(node_attr(n)) = p;
         return;
     }
+    /* we check if we have this attribute already and quite if the value stays the same */
     assert(vlink(p) != null);
     while (vlink(p) != null) {
         int t = attribute_id(vlink(p));
@@ -2298,22 +2301,43 @@ void set_attribute(halfword n, int i, int val)
         j++;
         p = vlink(p);
     }
+    /* j has now the position (if found) .. we assume a sorted list ! */
     p = node_attr(n);
-    if (attr_list_ref(p) != 1) {
-        if (attr_list_ref(p) > 1) {
+
+    if (attr_list_ref(p) == 0 ) {
+        /* the list is invalid i.e. freed already */
+        fprintf(stdout,"Node %d has an attribute list that is free already\n",(int) n);
+        /* the still dangling list gets ref count 1 */
+        attr_list_ref(p) = 1;
+    } else if (attr_list_ref(p) == 1) {
+        /* this can really happen HH-LS */
+        if (p == attr_list_cache) {
+            /*
+                attr_list_cache = cache_disabled;
+
+                or (saved a list creation):
+
+            */
             p = copy_attribute_list(p);
-            delete_attribute_ref(node_attr(n));
             node_attr(n) = p;
-        } else {
-            fprintf(stdout,
-                    "Node %d has an attribute list that is free already\n",
-                    (int) n);
+            /* the copied list gets ref count 1 */
+            attr_list_ref(p) = 1;
         }
+    } else {
+        /* the list is used multiple times so we make a copy */
+        p = copy_attribute_list(p);
+        /* we decrement the ref count or the original */
+        delete_attribute_ref(node_attr(n));
+        node_attr(n) = p;
+        /* the copied list gets ref count 1 */
         attr_list_ref(p) = 1;
     }
+
+
+    /* we go to position j in the list */
     while (j-- > 0)
         p = vlink(p);
-
+    /* if we have a hit we just set the value otherwise we add a new node */
     if (attribute_id(vlink(p)) == i) {
         attribute_value(vlink(p)) = val;
     } else {                    /* add a new node */
@@ -2325,6 +2349,9 @@ void set_attribute(halfword n, int i, int val)
 }
 
 
+
+
+
 @ @c
 int unset_attribute(halfword n, int i, int val)
 {
-- 
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