Improved cabinet handling

1 files changed, 67 insertions, 0 deletions

diff --git a/src/WixToolset.Core.Native/CabinetFileInfo.cs b/src/WixToolset.Core.Native/CabinetFileInfo.cs
new file mode 100644
index 00000000..ea229121
--- /dev/null
+++ b/src/WixToolset.Core.Native/CabinetFileInfo.cs
@@ -0,0 +1,67 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Core.Native
+{
+    using System;
+
+    /// <summary>
+    /// Properties of a file in a cabinet.
+    /// </summary>
+    public sealed class CabinetFileInfo
+    {
+        /// <summary>
+        /// Constructs CabinetFileInfo
+        /// </summary>
+        /// <param name="fileId">File Id</param>
+        /// <param name="size">Size of file</param>
+        /// <param name="date">Last modified date</param>
+        /// <param name="time">Last modified time</param>
+        public CabinetFileInfo(string fileId, int size, int date, int time)
+        {
+            this.FileId = fileId;
+            this.Size = size;
+            this.Date = date;
+            this.Time = time;
+        }
+
+        /// <summary>
+        /// Gets the file Id of the file.
+        /// </summary>
+        /// <value>file Id</value>
+        public string FileId { get; }
+
+        /// <summary>
+        /// Gets modified date (DOS format).
+        /// </summary>
+        public int Date { get; }
+
+        /// <summary>
+        /// Gets modified time (DOS format).
+        /// </summary>
+        public int Time { get; }
+
+        /// <summary>
+        /// Gets the size of the file in bytes.
+        /// </summary>
+        public int Size { get; }
+
+        /// <summary>
+        /// Compares this file info's date and time with another datetime.
+        /// </summary>
+        /// <param name="dateTime">Date and time to compare with/</param>
+        /// <returns>
+        /// For some reason DateTime.ToLocalTime() does not match kernel32.dll FileTimeToLocalFileTime().
+        /// Since cabinets store date and time with the kernel32.dll functions, we need to convert DateTime
+        /// to local file time using the kernel32.dll functions.
+        /// </returns>
+        public bool SameAsDateTime(DateTime dateTime)
+        {
+            long filetime = dateTime.ToFileTime();
+            long localTime = 0;
+            NativeMethods.FileTimeToLocalFileTime(ref filetime, ref localTime);
+            NativeMethods.FileTimeToDosDateTime(ref localTime, out var cabDate, out var cabTime);
+
+            return this.Date == cabDate && this.Time == cabTime;
+        }
+    }
+}