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Added SafeDRT_DATA to DRT

pull/180/head
dahall 2020-09-09 17:41:42 -06:00
parent e191ceabeb
commit 9fbc0a1750
1 changed files with 91 additions and 5 deletions
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96
PInvoke/Drt/Drt.cs
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@ -1,6 +1,8 @@
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
using Vanara.Extensions;
using Vanara.InteropServices;
using static Vanara.PInvoke.Crypt32;
using static Vanara.PInvoke.Ws2_32;
@ -1728,7 +1730,7 @@ namespace Vanara.PInvoke
[StructLayout(LayoutKind.Sequential)]
public struct DRT_BOOTSTRAP_RESOLVE_CONTEXT : IHandle
{
private IntPtr handle;
private readonly IntPtr handle;
/// <summary>Initializes a new instance of the <see cref="DRT_BOOTSTRAP_RESOLVE_CONTEXT"/> struct.</summary>
/// <param name="preexistingHandle">An <see cref="IntPtr"/> object that represents the pre-existing handle to use.</param>
@ -2146,7 +2148,7 @@ namespace Vanara.PInvoke
[StructLayout(LayoutKind.Sequential)]
public struct HDRT : IHandle
{
private IntPtr handle;
private readonly IntPtr handle;
/// <summary>Initializes a new instance of the <see cref="HDRT"/> struct.</summary>
/// <param name="preexistingHandle">An <see cref="IntPtr"/> object that represents the pre-existing handle to use.</param>
@ -2194,7 +2196,7 @@ namespace Vanara.PInvoke
[StructLayout(LayoutKind.Sequential)]
public struct HDRT_REGISTRATION_CONTEXT : IHandle
{
private IntPtr handle;
private readonly IntPtr handle;
/// <summary>Initializes a new instance of the <see cref="HDRT_REGISTRATION_CONTEXT"/> struct.</summary>
/// <param name="preexistingHandle">An <see cref="IntPtr"/> object that represents the pre-existing handle to use.</param>
@ -2242,7 +2244,7 @@ namespace Vanara.PInvoke
[StructLayout(LayoutKind.Sequential)]
public struct HDRT_SEARCH_CONTEXT : IHandle
{
private IntPtr handle;
private readonly IntPtr handle;
/// <summary>Initializes a new instance of the <see cref="HDRT_SEARCH_CONTEXT"/> struct.</summary>
/// <param name="preexistingHandle">An <see cref="IntPtr"/> object that represents the pre-existing handle to use.</param>
@ -2290,7 +2292,7 @@ namespace Vanara.PInvoke
[StructLayout(LayoutKind.Sequential)]
public struct HDRT_TRANSPORT : IHandle
{
private IntPtr handle;
private readonly IntPtr handle;
/// <summary>Initializes a new instance of the <see cref="HDRT_TRANSPORT"/> struct.</summary>
/// <param name="preexistingHandle">An <see cref="IntPtr"/> object that represents the pre-existing handle to use.</param>
@ -2333,5 +2335,89 @@ namespace Vanara.PInvoke
/// <inheritdoc/>
public IntPtr DangerousGetHandle() => handle;
}
/// <summary>
/// The DRT_DATA structure contains an arbitrary array of bytes. The structure definition includes aliases appropriate to the various
/// functions that use it.
/// </summary>
[PInvokeData("wincrypt.h")]
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public class SafeDRT_DATA : IDisposable
{
/// <summary>A DWORD variable that contains the count, in bytes, of data.</summary>
private uint cb;
/// <summary>A pointer to the data buffer.</summary>
private IntPtr pb;
/// <summary>Initializes a new instance of the <see cref="SafeDRT_DATA"/> class.</summary>
/// <param name="size">The size, in bytes, to allocate.</param>
public SafeDRT_DATA(int size)
{
cb = (uint)size;
if (size > 0)
pb = MemMethods.AllocMem(size);
}
/// <summary>Initializes a new instance of the <see cref="SafeDRT_DATA"/> class.</summary>
/// <param name="bytes">The bytes to copy into the blob.</param>
public SafeDRT_DATA(byte[] bytes) : this(bytes?.Length ?? 0) => Marshal.Copy(bytes, 0, pb, bytes.Length);
/// <summary>Initializes a new instance of the <see cref="SafeDRT_DATA"/> class with a string.</summary>
/// <param name="value">The string value.</param>
/// <param name="charSet">The character set to use.</param>
public SafeDRT_DATA(string value, CharSet charSet = CharSet.Ansi) : this(StringHelper.GetBytes(value, true, charSet))
{
}
private SafeDRT_DATA(IntPtr handle, int size)
{
pb = handle;
cb = (uint)size;
}
/// <summary>Represents an empty instance of a blob.</summary>
public static readonly SafeDRT_DATA Empty = new SafeDRT_DATA(IntPtr.Zero, 0);
/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
MemMethods.FreeMem(pb);
pb = IntPtr.Zero;
cb = 0;
}
/// <summary>Allocates from unmanaged memory sufficient memory to hold an object of type T.</summary>
/// <typeparam name="T">Native type</typeparam>
/// <param name="value">The value.</param>
/// <returns><see cref="SafeDRT_DATA"/> object to an native (unmanaged) memory block the size of T.</returns>
public static SafeDRT_DATA CreateFromStructure<T>(in T value = default) => new SafeDRT_DATA(InteropExtensions.MarshalToPtr(value, MemMethods.AllocMem, out var s), s);
/// <summary>
/// Allocates from unmanaged memory to represent a structure with a variable length array at the end and marshal these structure
/// elements. It is the callers responsibility to marshal what precedes the trailing array into the unmanaged memory. ONLY
/// structures with attribute StructLayout of LayoutKind.Sequential are supported.
/// </summary>
/// <typeparam name="T">Type of the trailing array of structures</typeparam>
/// <param name="values">Collection of structure objects</param>
/// <param name="prefixBytes">Number of bytes preceding the trailing array of structures</param>
/// <returns><see cref="SafeDRT_DATA"/> object to an native (unmanaged) structure with a trail array of structures</returns>
public static SafeDRT_DATA CreateFromList<T>(IEnumerable<T> values, int prefixBytes = 0) =>
new SafeDRT_DATA(InteropExtensions.MarshalToPtr(values, MemMethods.AllocMem, out var s, prefixBytes), s);
/// <summary>Allocates from unmanaged memory sufficient memory to hold an array of strings.</summary>
/// <param name="values">The list of strings.</param>
/// <param name="packing">The packing type for the strings.</param>
/// <param name="charSet">The character set to use for the strings.</param>
/// <param name="prefixBytes">Number of bytes preceding the trailing strings.</param>
/// <returns>
/// <see cref="SafeDRT_DATA"/> object to an native (unmanaged) array of strings stored using the <paramref
/// name="packing"/> model and the character set defined by <paramref name="charSet"/>.
/// </returns>
public static SafeDRT_DATA CreateFromStringList(IEnumerable<string> values, StringListPackMethod packing = StringListPackMethod.Concatenated, CharSet charSet = CharSet.Auto, int prefixBytes = 0) =>
new SafeDRT_DATA(InteropExtensions.MarshalToPtr(values, packing, MemMethods.AllocMem, out var s, charSet, prefixBytes), s);
private static IMemoryMethods MemMethods => HGlobalMemoryMethods.Instance;
}
}
}