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/*
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Version: MPL 1.1/GPL 2.0/LGPL 2.1
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The contents of this file are subject to the Mozilla Public License Version
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1.1 (the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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for the specific language governing rights and limitations under the License.
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The Original Code is the Open Hardware Monitor code.
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The Initial Developer of the Original Code is
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Michael Möller <m.moeller@gmx.ch>.
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Portions created by the Initial Developer are Copyright (C) 2011
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the Initial Developer. All Rights Reserved.
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Contributor(s):
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Alternatively, the contents of this file may be used under the terms of
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either the GNU General Public License Version 2 or later (the "GPL"), or
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the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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in which case the provisions of the GPL or the LGPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of either the GPL or the LGPL, and not to allow others to
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use your version of this file under the terms of the MPL, indicate your
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decision by deleting the provisions above and replace them with the notice
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and other provisions required by the GPL or the LGPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the MPL, the GPL or the LGPL.
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*/
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using System;
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using System.ComponentModel;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace OpenHardwareMonitor.Hardware {
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internal static class FirmwareTable {
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public static byte[] GetTable(Provider provider, string table) {
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int id = table[3] << 24 | table[2] << 16 | table[1] << 8 | table[0];
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return GetTable(provider, id);
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}
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public static byte[] GetTable(Provider provider, int table) {
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int size;
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try {
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size = NativeMethods.GetSystemFirmwareTable(provider, table,
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IntPtr.Zero, 0);
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} catch (DllNotFoundException) { return null; }
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catch (EntryPointNotFoundException) { return null; }
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if (size <= 0)
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return null;
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IntPtr nativeBuffer = Marshal.AllocHGlobal(size);
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NativeMethods.GetSystemFirmwareTable(provider, table, nativeBuffer, size);
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if (Marshal.GetLastWin32Error() != 0)
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return null;
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byte[] buffer = new byte[size];
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Marshal.Copy(nativeBuffer, buffer, 0, size);
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Marshal.FreeHGlobal(nativeBuffer);
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return buffer;
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}
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public static string[] EnumerateTables(Provider provider) {
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int size;
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try {
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size = NativeMethods.EnumSystemFirmwareTables(
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provider, IntPtr.Zero, 0);
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} catch (DllNotFoundException) { return null; }
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catch (EntryPointNotFoundException) { return null; }
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IntPtr nativeBuffer = Marshal.AllocHGlobal(size);
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NativeMethods.EnumSystemFirmwareTables(
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provider, nativeBuffer, size);
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byte[] buffer = new byte[size];
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Marshal.Copy(nativeBuffer, buffer, 0, size);
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Marshal.FreeHGlobal(nativeBuffer);
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string[] result = new string[size / 4];
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for (int i = 0; i < result.Length; i++)
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result[i] = Encoding.ASCII.GetString(buffer, 4 * i, 4);
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return result;
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}
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public enum Provider : int {
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ACPI = (byte)'A' << 24 | (byte)'C' << 16 | (byte)'P' << 8 | (byte)'I',
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FIRM = (byte)'F' << 24 | (byte)'I' << 16 | (byte)'R' << 8 | (byte)'M',
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RSMB = (byte)'R' << 24 | (byte)'S' << 16 | (byte)'M' << 8 | (byte)'B'
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}
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private static class NativeMethods {
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private const string KERNEL = "kernel32.dll";
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[DllImport(KERNEL, CallingConvention = CallingConvention.Winapi,
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SetLastError = true)]
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public static extern int EnumSystemFirmwareTables(
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Provider firmwareTableProviderSignature,
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IntPtr firmwareTableBuffer, int bufferSize);
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[DllImport(KERNEL, CallingConvention = CallingConvention.Winapi,
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SetLastError = true)]
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public static extern int GetSystemFirmwareTable(
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Provider firmwareTableProviderSignature,
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int firmwareTableID, IntPtr firmwareTableBuffer, int bufferSize);
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}
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}
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}
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