first commit

LibreHardwareMonitor-0.9.4/LibreHardwareMonitorLib/Hardware/FirmwareTable.cs

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+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+// Copyright (C) LibreHardwareMonitor and Contributors.
+// Partial Copyright (C) Michael Möller <mmoeller@openhardwaremonitor.org> and Contributors.
+// All Rights Reserved.
+
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace LibreHardwareMonitor.Hardware;
+
+internal static class FirmwareTable
+{
+    public static byte[] GetTable(Interop.Kernel32.Provider provider, string table)
+    {
+        int id = table[3] << 24 | table[2] << 16 | table[1] << 8 | table[0];
+        return GetTable(provider, id);
+    }
+
+    public static byte[] GetTable(Interop.Kernel32.Provider provider, int table)
+    {
+        int size;
+
+        try
+        {
+            size = Interop.Kernel32.GetSystemFirmwareTable(provider, table, IntPtr.Zero, 0);
+        }
+        catch (Exception e) when (e is DllNotFoundException or EntryPointNotFoundException)
+        {
+            return null;
+        }
+
+        if (size <= 0)
+            return null;
+
+        IntPtr allocatedBuffer = IntPtr.Zero;
+
+        try
+        {
+            allocatedBuffer = Marshal.AllocHGlobal(size);
+
+            Interop.Kernel32.GetSystemFirmwareTable(provider, table, allocatedBuffer, size);
+            if (Marshal.GetLastWin32Error() != 0)
+                return null;
+
+            byte[] buffer = new byte[size];
+            Marshal.Copy(allocatedBuffer, buffer, 0, size);
+            return buffer;
+        }
+        finally
+        {
+            if (allocatedBuffer != IntPtr.Zero)
+                Marshal.FreeHGlobal(allocatedBuffer);
+        }
+    }
+
+    public static string[] EnumerateTables(Interop.Kernel32.Provider provider)
+    {
+        int size;
+
+        try
+        {
+            size = Interop.Kernel32.EnumSystemFirmwareTables(provider, IntPtr.Zero, 0);
+        }
+        catch (Exception e) when (e is DllNotFoundException or EntryPointNotFoundException)
+        {
+            return null;
+        }
+
+        IntPtr allocatedBuffer = IntPtr.Zero;
+
+        try
+        {
+            allocatedBuffer = Marshal.AllocHGlobal(size);
+
+            Interop.Kernel32.EnumSystemFirmwareTables(provider, allocatedBuffer, size);
+
+            byte[] buffer = new byte[size];
+            Marshal.Copy(allocatedBuffer, buffer, 0, size);
+
+            string[] result = new string[size / 4];
+
+            for (int i = 0; i < result.Length; i++)
+                result[i] = Encoding.ASCII.GetString(buffer, 4 * i, 4);
+
+            return result;
+        }
+        finally
+        {
+            if (allocatedBuffer != IntPtr.Zero)
+                Marshal.FreeHGlobal(allocatedBuffer);
+        }
+    }
+}