Created
November 15, 2023 05:31
-
-
Save rkttu/addc27b20f0a9d55c0cbbeac67baf667 to your computer and use it in GitHub Desktop.
macOS wchar_t P/Invoke Sample
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// Require unsafe configuration. | |
using System.Runtime.InteropServices; | |
using System.Text; | |
namespace HelloWorld; | |
internal partial class NativeMethods | |
{ | |
// https://github.com/mono/mono/issues/9362 | |
static Encoding GetSystemUnicodeEncoding() | |
=> Environment.OSVersion.Platform == PlatformID.Unix ? Encoding.UTF32 : Encoding.Unicode; | |
public static byte[] ConvertToWideByteArray(string s) | |
=> GetSystemUnicodeEncoding().GetBytes(s); | |
private const string StandardLibraryMacOs = "libSystem.dylib"; | |
[DllImport(StandardLibraryMacOs, | |
CallingConvention = CallingConvention.Cdecl, | |
CharSet = CharSet.None, | |
ExactSpelling = true, | |
EntryPoint = nameof(wprintf))] | |
internal static extern int wprintf( | |
byte[] fmt); | |
[DllImport(StandardLibraryMacOs, | |
CallingConvention = CallingConvention.Cdecl, | |
CharSet = CharSet.None, | |
ExactSpelling = true, | |
EntryPoint = nameof(wprintf))] | |
internal static extern int wprintf( | |
byte[] fmt, | |
int arg0); | |
[DllImport(StandardLibraryMacOs, | |
CallingConvention = CallingConvention.Cdecl, | |
CharSet = CharSet.None, | |
ExactSpelling = true, | |
EntryPoint = nameof(wprintf))] | |
internal static extern int wprintf( | |
byte[] fmt, | |
int arg0, int arg1); | |
} | |
static unsafe class Program | |
{ | |
static void Main(string[] args) | |
{ | |
const int nLength = 5; | |
int* pContent = stackalloc int[nLength]; | |
int nResult = 0; | |
for (int i = 0; i < nLength; i++) | |
*(pContent + i) = i; | |
nResult = NativeMethods.wprintf( | |
NativeMethods.ConvertToWideByteArray("Printing %d numbers.\n"), | |
nLength); | |
NativeMethods.wprintf( | |
NativeMethods.ConvertToWideByteArray("- Result: %d\n"), | |
nResult); | |
for (int i = 0; i < nLength; i++) | |
{ | |
nResult = NativeMethods.wprintf( | |
NativeMethods.ConvertToWideByteArray("Index %d: Value %d\n"), | |
i, pContent[i]); | |
NativeMethods.wprintf( | |
NativeMethods.ConvertToWideByteArray("- Result: %d\n"), | |
nResult); | |
} | |
nResult = NativeMethods.wprintf( | |
NativeMethods.ConvertToWideByteArray("Done.\n")); | |
NativeMethods.wprintf( | |
NativeMethods.ConvertToWideByteArray("- Result: %d\n"), | |
nResult); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment