Merge branch 'uli42-pr/various' into 3.6.x

Attributes GH PR #815: https://github.com/ArcticaProject/nx-libs/pull/815

1 files changed, 62 insertions, 7 deletions

diff --git a/nx-X11/programs/Xserver/hw/nxagent/NXglyph.c b/nx-X11/programs/Xserver/hw/nxagent/NXglyph.c
index 35dcbc132..72d8242bd 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/NXglyph.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/NXglyph.c
@@ -59,6 +59,67 @@
 
 #endif
 
+GlyphRefPtr
+FindGlyphRef (GlyphHashPtr hash, CARD32 signature, Bool match, GlyphPtr compare)
+{
+    CARD32	elt, step, s;
+    GlyphPtr	glyph;
+    GlyphRefPtr	table, gr, del;
+    CARD32	tableSize = hash->hashSet->size;
+
+    table = hash->table;
+    elt = signature % tableSize;
+    step = 0;
+    del = 0;
+    for (;;)
+    {
+	gr = &table[elt];
+	s = gr->signature;
+	glyph = gr->glyph;
+	if (!glyph)
+	{
+	    if (del)
+		gr = del;
+	    break;
+	}
+	if (glyph == DeletedGlyph)
+	{
+	    if (!del)
+		del = gr;
+	    else if (gr == del)
+		break;
+	}
+#ifdef NXAGENT_SERVER
+	else if (s == signature && match && glyph->size != compare->size)
+        {
+          /*
+           * if the glyphsize is different there's no need to do a memcmp
+           * because it will surely report difference. And even worse:
+           * it will read beyond the end of glyph under some
+           * circumstances, which can be detected when compiling with
+           * -fsanitize=address.
+           */
+        }
+#endif
+	else if (s == signature &&
+		 (!match ||
+		  memcmp (&compare->info, &glyph->info, compare->size) == 0))
+	{
+	    break;
+	}
+	if (!step)
+	{
+	    step = signature % hash->hashSet->rehash;
+	    if (!step)
+		step = 1;
+	}
+	elt += step;
+	if (elt >= tableSize)
+	    elt -= tableSize;
+    }
+    return gr;
+}
+
 void
 AddGlyph (GlyphSetPtr glyphSet, GlyphPtr glyph, Glyph id)
 {
@@ -138,12 +199,6 @@ ResizeGlyphHash (GlyphHashPtr hash, CARD32 change, Bool global)
     int		    oldSize;
     CARD32	    s;
 
-    #ifdef NXAGENT_SERVER
-
-    CARD32          c;
-
-    #endif
-
     tableEntries = hash->tableEntries + change;
     hashSet = FindGlyphHashSet (tableEntries);
     if (hashSet == hash->hashSet)
@@ -164,7 +219,7 @@ ResizeGlyphHash (GlyphHashPtr hash, CARD32 change, Bool global)
 
                 #ifdef NXAGENT_SERVER
 
-                c = hash->table[i].corruptedGlyph;
+                CARD32 c = hash->table[i].corruptedGlyph;
 
                 #endif