Aric Stewart : usp10: Correct error with ScriptLayout log2vis.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9a59d81f7254cd6e4b99822e2f0cf997ae80e9f7
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=9a59d81f7254cd6e4b99822e2f0cf997ae80e9f7

Author: Aric Stewart <aric at codeweavers.com>
Date:   Thu Feb 14 12:10:31 2013 -0600

usp10: Correct error with ScriptLayout log2vis.

Issue found and test written by Huw Davies.

---

 dlls/usp10/bidi.c        |    6 ++++--
 dlls/usp10/tests/usp10.c |   15 +++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/dlls/usp10/bidi.c b/dlls/usp10/bidi.c
index a2edfa6..3b1823f 100644
--- a/dlls/usp10/bidi.c
+++ b/dlls/usp10/bidi.c
@@ -872,11 +872,13 @@ int BIDI_ReorderL2vLevel(int level, int *pIndexs, const BYTE* plevel, int cch, B
         reverse(pIndexs, ich);
     }
 
-    if (newlevel > 1)
+    if (newlevel >= 0)
     {
         ich = 0;
         for (; ich < cch; ich++)
-            if (plevel[ich] > level)
+            if (plevel[ich] < level)
+                break;
+            else if (plevel[ich] > level)
                 ich += BIDI_ReorderL2vLevel(level + 1, pIndexs + ich, plevel + ich,
                 cch - ich, fReverse) - 1;
     }
diff --git a/dlls/usp10/tests/usp10.c b/dlls/usp10/tests/usp10.c
index 7752f2c..354bc23 100644
--- a/dlls/usp10/tests/usp10.c
+++ b/dlls/usp10/tests/usp10.c
@@ -2786,6 +2786,11 @@ static void test_ScriptLayout(void)
 
         { 0, 0, 1, 1, 2, 2, 1, 1, 0, 1 },
         { 1, 0, 1, 2, 2, 1, 2, 1, 0, 1 },
+
+        { 1, 2, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 2, 2, 2, 0, 0, 0, 0, 0, 0, 0 },
+        { 2, 2, 2, 4, 4, 4, 1, 1, 0, 0 },
+        { 1, 2, 3, 0, 3, 2, 1, 0, 0, 0 }
     };
     static const int expect_l2v[][10] =
     {
@@ -2802,6 +2807,11 @@ static void test_ScriptLayout(void)
 
         { 0, 1, 7, 6, 4, 5, 3 ,2 ,8, 9},
 /**/    { 0, 1, 7, 5, 6, 4, 3 ,2 ,8, 9},
+
+        { 1, 0, 2, 3, 4, 5, 6, 7, 8, 9},
+        { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
+        { 2, 3, 4, 5, 6, 7, 1, 0, 8, 9},
+        { 2, 0, 1, 3, 5, 6, 4, 7, 8, 9}
     };
     static const int expect_v2l[][10] =
     {
@@ -2818,6 +2828,11 @@ static void test_ScriptLayout(void)
 
         { 0, 1, 7, 6, 4, 5, 3 ,2 ,8, 9},
         { 0, 1, 7, 6, 5, 3, 4 ,2 ,8, 9},
+
+        { 1, 0, 2, 3, 4, 5, 6, 7, 8, 9},
+        { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
+        { 7, 6, 0, 1, 2, 3, 4, 5, 8, 9},
+        { 1, 2, 0, 3, 6, 4, 5, 7, 8, 9}
     };
 
     int i, j, vistolog[sizeof(levels[0])], logtovis[sizeof(levels[0])];