Fix Issue 2 - wrong cutoff ministream size

Author: ironfede

sources/OpenMcdf/CompoundFile.cs

@@ -2100,8 +2100,8 @@ internal void SetStreamLength(CFItem cfItem, long length)
             if (cfItem.DirEntry.StartSetc != Sector.ENDOFCHAIN)
             {
                 if (
-                    (length < header.MinSizeStandardStream && cfItem.DirEntry.Size > header.MinSizeStandardStream)
-                    || (length > header.MinSizeStandardStream && cfItem.DirEntry.Size < header.MinSizeStandardStream)
+                    (length < header.MinSizeStandardStream && cfItem.DirEntry.Size >= header.MinSizeStandardStream)
+                    || (length >= header.MinSizeStandardStream && cfItem.DirEntry.Size < header.MinSizeStandardStream)
                    )
                 {
                     if (cfItem.DirEntry.Size < header.MinSizeStandardStream)

sources/Test/OpenMcdf.Test/CompoundFileTest.cs

@@ -783,39 +783,67 @@ public void Test_CORRUPTEDDOC_BUG36_SHOULD_THROW_CORRUPTED_FILE_EXCEPTION()
 
         }
 
-        //[TestMethod]
-        //public void Test_CORRUPTED_CYCLIC_DIFAT_VALIDATION_CHECK()
-        //{
-
-        //    CompoundFile cf = null;
-        //    try
-        //    {
-        //        cf = new CompoundFile("CiclycDFAT.cfs");
-        //        CFStorage s = cf.RootStorage.GetStorage("MyStorage");
-        //        CFStream st = s.GetStream("MyStream");
-        //        Assert.IsTrue(st.Size > 0);
-        //    }
-        //    catch (Exception ex)
-        //    {
-        //        Assert.IsTrue(ex is CFCorruptedFileException);
-        //    }
-        //    finally
-        //    {
-        //        if (cf != null)
-        //        {
-        //            cf.Close();
-        //        }
-        //    }
-        //}
-        //[TestMethod]
-        //public void Test_REM()
-        //{
-        //    var f = new CompoundFile();
-
-        //    byte[] bB = Helpers.GetBuffer(5 * 1024, 0x0B); 
-        //    f.RootStorage.AddStream("Test").AppendData(bB);
-        //    f.Save("Astorage.cfs");
-        //}
-
-    }
+        [TestMethod]
+        public void Test_ISSUE_2_WRONG_CUTOFF_SIZE()
+        {
+            FileStream fs = null;
+            try
+            {
+                if (File.Exists("TEST_ISSUE_2"))
+                {
+                    File.Delete("TEST_ISSUE_2");
+                }
+
+                CompoundFile cf = new CompoundFile(CFSVersion.Ver_3, CFSConfiguration.Default);
+                var s = cf.RootStorage.AddStream("miniToNormal");
+                s.Append(Helpers.GetBuffer(4090, 0xAA));
+               
+                cf.Save("TEST_ISSUE_2");
+                cf.Close();
+                var cf2 = new CompoundFile("TEST_ISSUE_2",CFSUpdateMode.Update,CFSConfiguration.Default);
+                cf2.RootStorage.GetStream("miniToNormal").Append(Helpers.GetBuffer(6, 0xBB));
+                cf2.Commit();
+                cf2.Close();
+            }
+            catch (Exception ex)
+            {
+                Assert.IsTrue(fs.CanRead && fs.CanSeek && fs.CanWrite);
+            }
+        }
+
+            //[TestMethod]
+            //public void Test_CORRUPTED_CYCLIC_DIFAT_VALIDATION_CHECK()
+            //{
+
+            //    CompoundFile cf = null;
+            //    try
+            //    {
+            //        cf = new CompoundFile("CiclycDFAT.cfs");
+            //        CFStorage s = cf.RootStorage.GetStorage("MyStorage");
+            //        CFStream st = s.GetStream("MyStream");
+            //        Assert.IsTrue(st.Size > 0);
+            //    }
+            //    catch (Exception ex)
+            //    {
+            //        Assert.IsTrue(ex is CFCorruptedFileException);
+            //    }
+            //    finally
+            //    {
+            //        if (cf != null)
+            //        {
+            //            cf.Close();
+            //        }
+            //    }
+            //}
+            //[TestMethod]
+            //public void Test_REM()
+            //{
+            //    var f = new CompoundFile();
+
+            //    byte[] bB = Helpers.GetBuffer(5 * 1024, 0x0B); 
+            //    f.RootStorage.AddStream("Test").AppendData(bB);
+            //    f.Save("Astorage.cfs");
+            //}
+
+        }
 }