From 295ffce55e0198e7a9f7d46b33f5c2b4147bf821 Mon Sep 17 00:00:00 2001
From: David 'Digit' Turner <digit@google.com>
Date: Wed, 3 Mar 2010 14:24:57 -0800
Subject: Update to FreeType 2.3.12

---
 src/truetype/ttinterp.c | 54 +++++++++++++++++++++++++++++++------------------
 1 file changed, 34 insertions(+), 20 deletions(-)

(limited to 'src/truetype/ttinterp.c')

diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c
index 2279a62..13aa9a2 100644
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -791,9 +791,9 @@
 
       /* allocate object */
       if ( FT_NEW( exec ) )
-        goto Exit;
+        goto Fail;
 
-      /* initialize it */
+      /* initialize it; in case of error this deallocates `exec' too */
       error = Init_Context( exec, memory );
       if ( error )
         goto Fail;
@@ -802,13 +802,10 @@
       driver->context = exec;
     }
 
-  Exit:
     return driver->context;
 
   Fail:
-    FT_FREE( exec );
-
-    return 0;
+    return NULL;
   }
 
 
@@ -2197,7 +2194,7 @@
     FT_ASSERT( !CUR.face->unpatented_hinting );
 #endif
 
-    return TT_DotFix14( dx, dy,
+    return TT_DotFix14( (FT_UInt32)dx, (FT_UInt32)dy,
                         CUR.GS.projVector.x,
                         CUR.GS.projVector.y );
   }
@@ -2223,7 +2220,7 @@
   Dual_Project( EXEC_OP_ FT_Pos  dx,
                          FT_Pos  dy )
   {
-    return TT_DotFix14( dx, dy,
+    return TT_DotFix14( (FT_UInt32)dx, (FT_UInt32)dy,
                         CUR.GS.dualVector.x,
                         CUR.GS.dualVector.y );
   }
@@ -4293,13 +4290,21 @@
       CUR.numFDefs++;
     }
 
+    /* Although FDEF takes unsigned 32-bit integer,  */
+    /* func # must be within unsigned 16-bit integer */
+    if ( n > 0xFFFFU )
+    {
+      CUR.error = TT_Err_Too_Many_Function_Defs;
+      return;
+    }
+
     rec->range  = CUR.curRange;
-    rec->opc    = n;
+    rec->opc    = (FT_UInt16)n;
     rec->start  = CUR.IP + 1;
     rec->active = TRUE;
 
     if ( n > CUR.maxFunc )
-      CUR.maxFunc = n;
+      CUR.maxFunc = (FT_UInt16)n;
 
     /* Now skip the whole function definition. */
     /* We don't allow nested IDEFS & FDEFs.    */
@@ -4556,13 +4561,20 @@
       CUR.numIDefs++;
     }
 
-    def->opc    = args[0];
+    /* opcode must be unsigned 8-bit integer */
+    if ( 0 > args[0] || args[0] > 0x00FF )
+    {
+      CUR.error = TT_Err_Too_Many_Instruction_Defs;
+      return;
+    }
+
+    def->opc    = (FT_Byte)args[0];
     def->start  = CUR.IP+1;
     def->range  = CUR.curRange;
     def->active = TRUE;
 
     if ( (FT_ULong)args[0] > CUR.maxIns )
-      CUR.maxIns = args[0];
+      CUR.maxIns = (FT_Byte)args[0];
 
     /* Now skip the whole function definition. */
     /* We don't allow nested IDEFs & FDEFs.    */
@@ -5530,20 +5542,20 @@
     {
       if ( CUR.GS.both_x_axis )
       {
-        dx = TT_MulFix14( args[0], 0x4000 );
+        dx = TT_MulFix14( (FT_UInt32)args[0], 0x4000 );
         dy = 0;
       }
       else
       {
         dx = 0;
-        dy = TT_MulFix14( args[0], 0x4000 );
+        dy = TT_MulFix14( (FT_UInt32)args[0], 0x4000 );
       }
     }
     else
 #endif
     {
-      dx = TT_MulFix14( args[0], CUR.GS.freeVector.x );
-      dy = TT_MulFix14( args[0], CUR.GS.freeVector.y );
+      dx = TT_MulFix14( (FT_UInt32)args[0], CUR.GS.freeVector.x );
+      dy = TT_MulFix14( (FT_UInt32)args[0], CUR.GS.freeVector.y );
     }
 
     while ( CUR.GS.loop > 0 )
@@ -5709,8 +5721,8 @@
 
     if ( CUR.GS.gep0 == 0 )   /* If in twilight zone */
     {
-      CUR.zp0.org[point].x = TT_MulFix14( distance, CUR.GS.freeVector.x );
-      CUR.zp0.org[point].y = TT_MulFix14( distance, CUR.GS.freeVector.y ),
+      CUR.zp0.org[point].x = TT_MulFix14( (FT_UInt32)distance, CUR.GS.freeVector.x );
+      CUR.zp0.org[point].y = TT_MulFix14( (FT_UInt32)distance, CUR.GS.freeVector.y ),
       CUR.zp0.cur[point]   = CUR.zp0.org[point];
     }
 
@@ -5897,10 +5909,12 @@
     if ( CUR.GS.gep1 == 0 )
     {
       CUR.zp1.org[point].x = CUR.zp0.org[CUR.GS.rp0].x +
-                             TT_MulFix14( cvt_dist, CUR.GS.freeVector.x );
+                             TT_MulFix14( (FT_UInt32)cvt_dist,
+                                          CUR.GS.freeVector.x );
 
       CUR.zp1.org[point].y = CUR.zp0.org[CUR.GS.rp0].y +
-                             TT_MulFix14( cvt_dist, CUR.GS.freeVector.y );
+                             TT_MulFix14( (FT_UInt32)cvt_dist,
+                                          CUR.GS.freeVector.y );
 
       CUR.zp1.cur[point] = CUR.zp0.cur[point];
     }
-- 
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