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Anonymous structs #171

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Jan 7, 2025
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Anonymous structs #171

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4 changes: 2 additions & 2 deletions src/cs/examples/helloworld/helloworld-app/Generated/AssemblyAttributes.g.cs
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@@ -1,6 +1,6 @@
// <auto-generated>
// This code was generated by the following tool on 2025-01-04 10:45:12 GMT-05:00:
// https://github.com/bottlenoselabs/c2cs (v2025-01-04 10:45:12 GMT-05:00)
// This code was generated by the following tool on 2025-01-07 13:23:17 GMT-05:00:
// https://github.com/bottlenoselabs/c2cs (v2025-01-07 13:23:17 GMT-05:00)
//
// Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
// </auto-generated>
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2 changes: 1 addition & 1 deletion src/cs/examples/helloworld/helloworld-app/Generated/Runtime.g.cs
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@@ -1,5 +1,5 @@
// <auto-generated>
// This code was generated by the following tool on 2025-01-04 10:45:12 GMT-05:00:
// This code was generated by the following tool on 2025-01-07 13:23:17 GMT-05:00:
// https://github.com/bottlenoselabs/c2cs (v0.0.0.0)
//
// Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
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32 changes: 28 additions & 4 deletions ...terop.LibraryImportGenerator/Microsoft.Interop.LibraryImportGenerator/LibraryImports.g.cs
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Expand Up @@ -27,24 +27,32 @@ namespace helloworld
{
public static unsafe partial class my_c_library
{
[global::System.Runtime.InteropServices.DllImportAttribute("my_c_library", EntryPoint = "hw_pass_enum", ExactSpelling = true)]
public static extern partial void hw_pass_enum(global::helloworld.my_c_library.hw_my_enum_week_day e);
[global::System.Runtime.InteropServices.DllImportAttribute("my_c_library", EntryPoint = "hw_pass_enum_by_reference", ExactSpelling = true)]
public static extern partial void hw_pass_enum_by_reference(global::helloworld.my_c_library.hw_week_day* e);
}
}
namespace helloworld
{
public static unsafe partial class my_c_library
{
[global::System.Runtime.InteropServices.DllImportAttribute("my_c_library", EntryPoint = "hw_pass_enum_by_value", ExactSpelling = true)]
public static extern partial void hw_pass_enum_by_value(global::helloworld.my_c_library.hw_week_day e);
}
}
namespace helloworld
{
public static unsafe partial class my_c_library
{
[global::System.Runtime.InteropServices.DllImportAttribute("my_c_library", EntryPoint = "hw_pass_integers_by_reference", ExactSpelling = true)]
public static extern partial void hw_pass_integers_by_reference(ushort* a, int* b, ulong* c);
public static extern partial void hw_pass_integers_by_reference(ushort* a, uint* b, ulong* c);
}
}
namespace helloworld
{
public static unsafe partial class my_c_library
{
[global::System.Runtime.InteropServices.DllImportAttribute("my_c_library", EntryPoint = "hw_pass_integers_by_value", ExactSpelling = true)]
public static extern partial void hw_pass_integers_by_value(ushort a, int b, ulong c);
public static extern partial void hw_pass_integers_by_value(ushort a, uint b, ulong c);
}
}
namespace helloworld
Expand All @@ -55,3 +63,19 @@ public static unsafe partial class my_c_library
public static extern partial void hw_pass_string(global::Interop.Runtime.CString s);
}
}
namespace helloworld
{
public static unsafe partial class my_c_library
{
[global::System.Runtime.InteropServices.DllImportAttribute("my_c_library", EntryPoint = "hw_pass_struct_by_reference", ExactSpelling = true)]
public static extern partial void hw_pass_struct_by_reference(global::helloworld.my_c_library.hw_event* e);
}
}
namespace helloworld
{
public static unsafe partial class my_c_library
{
[global::System.Runtime.InteropServices.DllImportAttribute("my_c_library", EntryPoint = "hw_pass_struct_by_value", ExactSpelling = true)]
public static extern partial void hw_pass_struct_by_value(global::helloworld.my_c_library.hw_event e);
}
}
137 changes: 124 additions & 13 deletions src/cs/examples/helloworld/helloworld-app/Generated/my_c_library.g.cs
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@@ -1,5 +1,5 @@
// <auto-generated>
// This code was generated by the following tool on 2025-01-04 10:45:12 GMT-05:00:
// This code was generated by the following tool on 2025-01-07 13:23:17 GMT-05:00:
// https://github.com/bottlenoselabs/c2cs (v0.0.0.0)
//
// Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
Expand Down Expand Up @@ -37,33 +37,144 @@ public static unsafe partial class my_c_library
[UnmanagedCallConv(CallConvs = new[] { typeof(CallConvCdecl) })]
public static partial void hw_invoke_callback2(FnPtr_CString_Void f, CString s);

[LibraryImport(LibraryName, EntryPoint = "hw_pass_enum")]
[LibraryImport(LibraryName, EntryPoint = "hw_pass_enum_by_reference")]
[UnmanagedCallConv(CallConvs = new[] { typeof(CallConvCdecl) })]
public static partial void hw_pass_enum(hw_my_enum_week_day e);
public static partial void hw_pass_enum_by_reference(hw_week_day* e);

[LibraryImport(LibraryName, EntryPoint = "hw_pass_enum_by_value")]
[UnmanagedCallConv(CallConvs = new[] { typeof(CallConvCdecl) })]
public static partial void hw_pass_enum_by_value(hw_week_day e);

[LibraryImport(LibraryName, EntryPoint = "hw_pass_integers_by_reference")]
[UnmanagedCallConv(CallConvs = new[] { typeof(CallConvCdecl) })]
public static partial void hw_pass_integers_by_reference(ushort* a, int* b, ulong* c);
public static partial void hw_pass_integers_by_reference(ushort* a, uint* b, ulong* c);

[LibraryImport(LibraryName, EntryPoint = "hw_pass_integers_by_value")]
[UnmanagedCallConv(CallConvs = new[] { typeof(CallConvCdecl) })]
public static partial void hw_pass_integers_by_value(ushort a, int b, ulong c);
public static partial void hw_pass_integers_by_value(ushort a, uint b, ulong c);

[LibraryImport(LibraryName, EntryPoint = "hw_pass_string")]
[UnmanagedCallConv(CallConvs = new[] { typeof(CallConvCdecl) })]
public static partial void hw_pass_string(CString s);

[LibraryImport(LibraryName, EntryPoint = "hw_pass_struct_by_reference")]
[UnmanagedCallConv(CallConvs = new[] { typeof(CallConvCdecl) })]
public static partial void hw_pass_struct_by_reference(hw_event* e);

[LibraryImport(LibraryName, EntryPoint = "hw_pass_struct_by_value")]
[UnmanagedCallConv(CallConvs = new[] { typeof(CallConvCdecl) })]
public static partial void hw_pass_struct_by_value(hw_event e);

public static readonly CString HW_STRING_POINTER = (CString)"Hello world using UTF-8 string literal from the C library's data segment!"u8;

public enum hw_my_enum_week_day : int
[StructLayout(LayoutKind.Explicit, Size = 40, Pack = 8)]
public partial struct hw_event
{
[FieldOffset(0)]
public hw_event_kind kind; // size = 4

[FieldOffset(8)] // size = 8
public CString _string1;

public string string1
{
get
{
return CString.ToString(_string1);
}
set
{
_string1 = CString.FromString(value);
}
}

[FieldOffset(16)] // size = 8
public CString _string2;

public string string2
{
get
{
return CString.ToString(_string2);
}
set
{
_string2 = CString.FromString(value);
}
}

[FieldOffset(8)]
public sbyte s8; // size = 1

[FieldOffset(8)]
public byte u8; // size = 1

[FieldOffset(8)]
public short s16; // size = 2

[FieldOffset(8)]
public ushort u16; // size = 2

[FieldOffset(8)]
public int s32; // size = 4

[FieldOffset(8)]
public uint u32; // size = 4

[FieldOffset(8)]
public long s64; // size = 8

[FieldOffset(8)]
public ulong u64; // size = 8

[FieldOffset(8)] // size = 16
public fixed sbyte s128[16];

[FieldOffset(8)] // size = 16
public fixed byte u128[16];

[FieldOffset(8)] // size = 32
public fixed long s256[4];

[FieldOffset(8)] // size = 32
public fixed ulong u256[4];

[FieldOffset(8)]
public ulong size; // size = 8

[FieldOffset(8)]
public CBool boolean; // size = 1
}

public enum hw_event_kind : int
{
HW_EVENT_KIND_UNKNOWN = 0,
HW_EVENT_KIND_STRING = 1,
HW_EVENT_KIND_S8 = 2,
HW_EVENT_KIND_U8 = 3,
HW_EVENT_KIND_S16 = 4,
HW_EVENT_KIND_U16 = 5,
HW_EVENT_KIND_S32 = 6,
HW_EVENT_KIND_U32 = 7,
HW_EVENT_KIND_S64 = 8,
HW_EVENT_KIND_U64 = 9,
HW_EVENT_KIND_S128 = 10,
HW_EVENT_KIND_U128 = 11,
HW_EVENT_KIND_S256 = 12,
HW_EVENT_KIND_U256 = 13,
HW_EVENT_KIND_BOOL = 14,
_HW_EVENT_KIND_FORCE_U32 = 2147483647
}

public enum hw_week_day : int
{
HW_MY_ENUM_WEEK_DAY_UNKNOWN = 0,
HW_MY_ENUM_WEEK_DAY_MONDAY = 1,
HW_MY_ENUM_WEEK_DAY_TUESDAY = 2,
HW_MY_ENUM_WEEK_DAY_WEDNESDAY = 3,
HW_MY_ENUM_WEEK_DAY_THURSDAY = 4,
HW_MY_ENUM_WEEK_DAY_FRIDAY = 5,
_HW_MY_ENUM_WEEK_DAY_FORCE_U32 = 2147483647
HW_WEEK_DAY_UNKNOWN = 0,
HW_WEEK_DAY_MONDAY = 1,
HW_WEEK_DAY_TUESDAY = 2,
HW_WEEK_DAY_WEDNESDAY = 3,
HW_WEEK_DAY_THURSDAY = 4,
HW_WEEK_DAY_FRIDAY = 5,
_HW_WEEK_DAY_FORCE_U32 = 2147483647
}

[StructLayout(LayoutKind.Sequential)]
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42 changes: 35 additions & 7 deletions src/cs/examples/helloworld/helloworld-app/Program.cs
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Expand Up @@ -35,10 +35,10 @@ private static unsafe void Main()
using var cString3 = (CString)"Hello world again from C# using UTF-16 converted UTF-8 and allocated! Don't forgot to free this string!";
hw_pass_string(cString3);

hw_pass_integers_by_value(65449, -255, 24242);
hw_pass_integers_by_value(65449, 255, 24242);

ushort a = 65449;
var b = -255;
var b = 255U;
ulong c = 24242;
hw_pass_integers_by_reference(&a, &b, &c);

Expand All @@ -48,16 +48,44 @@ private static unsafe void Main()
// - It uses the same naming as `System.Func<>`. The last type on the name is always the return type. In this case 'void`.
// Only available in C# 9 (.NET 5+). See https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/unsafe-code#function-pointers
// Additionally function pointers need to use the `address-of` operator (&) to a C# static function marked with the UnmanagedCallersOnly attribute. See https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.unmanagedcallersonlyattribute?view=net-9.0
var functionPointer = new hw_callback(&Callback);
var functionPointer1 = new hw_callback(&Callback);
var functionPointer2 = new FnPtr_CString_Void(&Callback);
#else
var functionPointer = new FnPtr_CString_Void(Callback);
var functionPointer1 = new hw_callback(Callback);
var functionPointer2 = new FnPtr_CString_Void(Callback);
#endif

using var cStringCallback1 = (CString)"Hello from callback!";
hw_invoke_callback1(functionPointer, cStringCallback1);
hw_invoke_callback1(functionPointer1, cStringCallback1);

// using var cStringCallback2 = (CString)"Hello again from callback!";
// hw_invoke_callback2(functionPointer, cStringCallback2);
using var cStringCallback2 = (CString)"Hello again from callback!";
hw_invoke_callback2(functionPointer2, cStringCallback2);

var weekday = DateTime.UtcNow.DayOfWeek switch
{
DayOfWeek.Monday => hw_week_day.HW_WEEK_DAY_MONDAY,
DayOfWeek.Tuesday => hw_week_day.HW_WEEK_DAY_TUESDAY,
DayOfWeek.Wednesday => hw_week_day.HW_WEEK_DAY_WEDNESDAY,
DayOfWeek.Thursday => hw_week_day.HW_WEEK_DAY_THURSDAY,
DayOfWeek.Friday => hw_week_day.HW_WEEK_DAY_FRIDAY,
DayOfWeek.Sunday => hw_week_day.HW_WEEK_DAY_UNKNOWN,
DayOfWeek.Saturday => hw_week_day.HW_WEEK_DAY_UNKNOWN,
_ => hw_week_day.HW_WEEK_DAY_UNKNOWN
};

hw_pass_enum_by_value(weekday);
hw_pass_enum_by_reference(&weekday);

var event1 = default(hw_event);
event1.kind = hw_event_kind.HW_EVENT_KIND_STRING;
event1.string1 = "Anonymous structs and unions have their fields inlined in C# with using the same value for the FieldOffset attribute.";
event1.string2 = "If the struct is larger than 16-24 bytes (as is the case here), consider passing it by reference rather than by value.";
hw_pass_struct_by_value(event1);

var event2 = default(hw_event);
event2.kind = hw_event_kind.HW_EVENT_KIND_BOOL;
event2.boolean = true;
hw_pass_struct_by_reference(&event2);
}

#if NET5_0_OR_GREATER
Expand Down
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