Bugfix/unicode

src/Zip/ZipEntryFactory.cs

@@ -200,16 +200,33 @@ public bool IsUnicodeText
 			set { isUnicodeText_ = value; }
 		}
 
-		#endregion
-
-		#region IEntryFactory Members
-
-		/// <summary>
-		/// Make a new <see cref="ZipEntry"/> for a file.
-		/// </summary>
-		/// <param name="fileName">The name of the file to create a new entry for.</param>
-		/// <returns>Returns a new <see cref="ZipEntry"/> based on the <paramref name="fileName"/>.</returns>
-		public ZipEntry MakeFileEntry(string fileName)
+        #endregion
+
+        #region Private Methods
+
+        /// <summary>
+        /// Check whether the file name is unicode encoded or not.
+        /// </summary>
+        /// <param name="fileName">The name of the file to check its encoding.</param>
+        /// <returns></returns>
+        private bool IsUnicodeFileName(string fileName)
+        {
+            Encoding defaultEncoding = Encoding.GetEncoding(ZipConstants.DefaultCodePage);
+            byte[] unicodeFileNameBytes = defaultEncoding.GetBytes(fileName);
+            string unicodeFileName = defaultEncoding.GetString(unicodeFileNameBytes);
+            return unicodeFileName != fileName;
+        }
+
+        #endregion
+
+        #region IEntryFactory Members
+
+        /// <summary>
+        /// Make a new <see cref="ZipEntry"/> for a file.
+        /// </summary>
+        /// <param name="fileName">The name of the file to create a new entry for.</param>
+        /// <returns>Returns a new <see cref="ZipEntry"/> based on the <paramref name="fileName"/>.</returns>
+        public ZipEntry MakeFileEntry(string fileName)
 		{
 			return MakeFileEntry(fileName, null, true);
 		}
@@ -236,6 +253,11 @@ public ZipEntry MakeFileEntry(string fileName, string entryName, bool useFileSys
 			ZipEntry result = new ZipEntry(nameTransform_.TransformFile(entryName != null && entryName.Length > 0 ? entryName : fileName));
 			result.IsUnicodeText = isUnicodeText_;
 
+            if (IsUnicodeFileName(result.Name))
+            {
+                result.IsUnicodeText = true;
+            }
+
             int externalAttributes = 0;
 			bool useAttributes = (setAttributes_ != 0);