mirror of
https://github.com/greenshot/greenshot.git
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94 lines
3.1 KiB
C#
94 lines
3.1 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2016 Thomas Braun, Jens Klingen, Robin Krom
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*
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* For more information see: http://getgreenshot.org/
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* The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Runtime.InteropServices;
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namespace GreenshotPlugin.Core {
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/// <summary>
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/// A helper class which does the mashalling for structs
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/// </summary>
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public static class BinaryStructHelper {
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/// <summary>
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/// Get a struct from a byte array
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/// </summary>
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/// <typeparam name="T">typeof struct</typeparam>
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/// <param name="bytes">byte[]</param>
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/// <returns>struct</returns>
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public static T FromByteArray<T>(byte[] bytes) where T : struct {
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IntPtr ptr = IntPtr.Zero;
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try {
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int size = Marshal.SizeOf(typeof(T));
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ptr = Marshal.AllocHGlobal(size);
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Marshal.Copy(bytes, 0, ptr, size);
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return FromIntPtr<T>(ptr);
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} finally {
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if (ptr != IntPtr.Zero) {
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Marshal.FreeHGlobal(ptr);
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}
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}
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}
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/// <summary>
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/// Get a struct from a byte array
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/// </summary>
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/// <typeparam name="T">typeof struct</typeparam>
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/// <param name="intPtr">Pointer to the structor to return</param>
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/// <returns>struct</returns>
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public static T FromIntPtr<T>(IntPtr intPtr) where T : struct {
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object obj = Marshal.PtrToStructure(intPtr, typeof(T));
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return (T)obj;
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}
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/// <summary>
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/// copy a struct to a byte array
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/// </summary>
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/// <typeparam name="T">typeof struct</typeparam>
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/// <param name="obj">struct</param>
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/// <returns>byte[]</returns>
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public static byte[] ToByteArray<T>(T obj) where T : struct {
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IntPtr ptr = IntPtr.Zero;
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try {
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int size = Marshal.SizeOf(typeof(T));
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ptr = Marshal.AllocHGlobal(size);
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Marshal.StructureToPtr(obj, ptr, true);
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return FromPtrToByteArray<T>(ptr);
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} finally {
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if (ptr != IntPtr.Zero) {
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Marshal.FreeHGlobal(ptr);
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}
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}
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}
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/// <summary>
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/// copy a struct from a pointer to a byte array
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/// </summary>
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/// <typeparam name="T">typeof struct</typeparam>
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/// <param name="ptr">IntPtr to struct</param>
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/// <returns>byte[]</returns>
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public static byte[] FromPtrToByteArray<T>(IntPtr ptr) where T : struct {
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int size = Marshal.SizeOf(typeof(T));
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byte[] bytes = new byte[size];
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Marshal.Copy(ptr, bytes, 0, size);
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return bytes;
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}
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}
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}
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