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[Rgen] Add the needed code to make the objc_msgSend signatures.
Add the code that will calculate the signature needed in the objc_msgSend which will be the method that calls the native objc message.
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37
src/rgen/Microsoft.Macios.Generator/Attributes/MarshalDirective.cs
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,37 @@ | ||
| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT License. | ||
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| using System; | ||
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| namespace Microsoft.Macios.Generator.Attributes; | ||
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| record CustomMarshalDirective (string? NativePrefix, string? NativeSuffix, string? Library); | ||
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| static class ExportDataExtensions { | ||
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| public static bool ShouldMarshalNativeExceptions<T> (this ExportData<T> self) where T : Enum | ||
| => self switch { | ||
| ExportData<ObjCBindings.Property> property => property.Flags.HasFlag (ObjCBindings.Property | ||
| .CustomMarshalDirective), | ||
| ExportData<ObjCBindings.Method> method => method.Flags.HasFlag ( | ||
| ObjCBindings.Property.CustomMarshalDirective), | ||
| _ => false, | ||
| }; | ||
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| public static CustomMarshalDirective? ToCustomMarshalDirective<T> (this ExportData<T> self) where T : Enum | ||
| { | ||
| var present = self switch { | ||
| ExportData<ObjCBindings.Property> property => property.Flags.HasFlag (ObjCBindings.Property | ||
| .CustomMarshalDirective), | ||
| ExportData<ObjCBindings.Method> method => method.Flags.HasFlag ( | ||
| ObjCBindings.Property.CustomMarshalDirective), | ||
| _ => false, | ||
| }; | ||
| if (present) { | ||
| return new (self.NativePrefix, self.NativeSuffix, self.Library); | ||
| } | ||
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| return null; | ||
| } | ||
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| } |
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104 changes: 104 additions & 0 deletions
104
src/rgen/Microsoft.Macios.Generator/Emitters/BindingSyntaxFactory.ObjCRuntime.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT License. | ||
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| using System; | ||
| using System.Collections.Immutable; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using Microsoft.Macios.Generator.Attributes; | ||
| using Microsoft.Macios.Generator.DataModel; | ||
| using Microsoft.Macios.Generator.Extensions; | ||
| using TypeInfo = Microsoft.Macios.Generator.DataModel.TypeInfo; | ||
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| namespace Microsoft.Macios.Generator.Emitters; | ||
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| static partial class BindingSyntaxFactory{ | ||
| readonly static string objc_msgSend = "objc_msgSend"; | ||
| readonly static string objc_msgSendSuper = "objc_msgSendSuper"; | ||
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| static string? GetObjCMessageSendMethodName<T> (ExportData<T> exportData, | ||
| TypeInfo returnType, ImmutableArray<Parameter> parameters, bool isSuper = false, bool isStret = false) where T : Enum | ||
| { | ||
| var flags = exportData.Flags; | ||
| if (flags is null) | ||
| // flags are not set, should be a bug, but we will return null | ||
| return null; | ||
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| // the name of the objcSend method is calculated in the following way | ||
| // {CustomMarshallPrefix}_{MarshallTypeOfReturnType}_{objcSendMsg}{stret?_stret}_{string.Join('_', MarshallTypeArgs)}{nativeException?_exception}{CustomMarsahllPostfix} | ||
| // we will sue a sb to make things easy to follow | ||
| var sb = new StringBuilder (); | ||
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| // first, decide if the user created a custom marshalling by checking the flags of the export data | ||
| CustomMarshalDirective? customMarshalDirective = null; | ||
| if (flags.HasCustomMarshalDirective ()) { | ||
| customMarshalDirective = exportData.ToCustomMarshalDirective (); | ||
| } | ||
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| if (customMarshalDirective?.NativePrefix is not null) { | ||
| sb.Append (customMarshalDirective.NativePrefix); | ||
| } else if (flags.HasMarshalNativeExceptions ()) { | ||
| sb.Append ("xamarin_"); | ||
| } | ||
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| // return types do not have a reference kind | ||
| sb.Append (returnType.ToMarshallType (ReferenceKind.None)); | ||
| sb.Append ('_'); | ||
| // append the msg method based if it is for super or not, do not append '_' intimidatingly, since if we do | ||
| // not have parameters, we are done | ||
| sb.Append (isSuper ? objc_msgSendSuper : objc_msgSend); | ||
| if (isStret) { | ||
| sb.Append ("_stret"); | ||
| } | ||
| // loop over params and get their native handler name | ||
| if (parameters.Length > 0) { | ||
| sb.Append ('_'); | ||
| sb.AppendJoin ('_', parameters.Select ( p => p.Type.ToMarshallType (p.ReferenceKind))); | ||
| } | ||
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| // check if we do have a custom marshall exception set for the export | ||
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| // check any possible custom postfix naming | ||
| if (customMarshalDirective?.NativeSuffix is not null) { | ||
| sb.Append (customMarshalDirective.NativeSuffix); | ||
| } else if (flags.HasMarshalNativeExceptions ()) { | ||
| sb.Append ("_exception"); | ||
| } | ||
| return sb.ToString (); | ||
| } | ||
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| public static (string? Getter, string? Setter) GetObjCMessageSendMethods (in Property property, bool isSuper = false, bool isStret = false) | ||
| { | ||
| if (property.IsProperty) { | ||
| // the getter and the setter depend of the accessors that have been ser for the property, we do not want | ||
| // to calculate things that we wont use. The export data used will aslo depend if the getter/setter has a | ||
| // export attr attached | ||
| var getter = property.GetAccessor (AccessorKind.Getter); | ||
| string? getterMsgSend = null; | ||
| if (getter is not null) { | ||
| var getterExportData = getter.Value.ExportPropertyData ?? property.ExportPropertyData; | ||
| if (getterExportData is not null) { | ||
| getterMsgSend = GetObjCMessageSendMethodName (getterExportData.Value, property.ReturnType, [], | ||
| isSuper, isStret); | ||
| } | ||
| } | ||
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| var setter = property.GetAccessor (AccessorKind.Setter); | ||
| string? setterMsgSend = null; | ||
| if (setter is not null) { | ||
| var setterExportData = setter.Value.ExportPropertyData ?? property.ExportPropertyData; | ||
| if (setterExportData is not null) { | ||
| setterMsgSend = GetObjCMessageSendMethodName (setterExportData.Value, TypeInfo.Void, | ||
| [property.ValueParameter], isSuper, isStret); | ||
| } | ||
| } | ||
| return (Getter: getterMsgSend, Setter: setterMsgSend); | ||
| } | ||
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| return default; | ||
| } | ||
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| public static string? GetObjCMessageSendMethod (in Method method, bool isSuper = false, bool isStret = false) | ||
| => GetObjCMessageSendMethodName (method.ExportMethodData, method.ReturnType, method.Parameters, isSuper, isStret); | ||
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| } |
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