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// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.Linq;
using SharpGen.CppModel;
namespace SharpGen.Model;
/// <summary>
/// A structElement that maps to a native struct
/// </summary>
public sealed class CsStruct : CsTypeBase
{
private CsBaseItemListCache<CsField> _fields;
private bool hasMarshalType, hasMarshalTypeFromFields;
public CsStruct(CppStruct cppStruct, string name) : base(cppStruct, name)
{
if (cppStruct == null)
return;
var tag = cppStruct.Rule;
Align = tag.StructPack ?? Align;
HasMarshalType = tag.StructHasNativeValueType ?? HasMarshalType;
GenerateAsClass = tag.StructToClass ?? GenerateAsClass;
HasCustomMarshal = tag.StructCustomMarshal ?? HasCustomMarshal;
IsStaticMarshal = tag.IsStaticMarshal ?? IsStaticMarshal;
HasCustomNew = tag.StructCustomNew ?? HasCustomNew;
}
public override uint Size => StructSize;
public uint StructSize { private get; set; }
/// <summary>
/// Packing alignment for this type (Default is 0 => Platform default)
/// </summary>
public int Align { get; set; }
public IReadOnlyList<CsField> Fields => _fields.GetList(this);
public IEnumerable<CsField> PublicFields => _fields.Enumerate(this)
.Where(field => field.Relations.Count == 0);
public IEnumerable<CsExpressionConstant> ExpressionConstants => Items.OfType<CsExpressionConstant>();
public IEnumerable<CsGuidConstant> GuidConstants => Items.OfType<CsGuidConstant>();
public IEnumerable<CsResultConstant> ResultConstants => Items.OfType<CsResultConstant>();
/// <summary>
/// True if this structure is using an explicit layout else it's a sequential structure
/// </summary>
public bool ExplicitLayout { get; set; }
/// <summary>
/// True if this struct needs an internal marshal type
/// </summary>
public bool HasMarshalType
{
get => hasMarshalType || hasMarshalTypeFromFields
|| HasCustomMarshal || IsStaticMarshal || HasCustomNew || GenerateAsClass;
set => hasMarshalType = value;
}
public bool HasCustomMarshal { get; }
public bool IsStaticMarshal { get; set; }
public bool GenerateAsClass { get; }
public bool HasCustomNew { get; set; }
/// <summary>
/// True if the native type this structure represents is a native primitive type
/// </summary>
public bool IsNativePrimitive { get; set; }
/// <summary>
/// List of declared inner structs
/// </summary>
public IEnumerable<CsStruct> InnerStructs => Items.OfType<CsStruct>();
protected override uint? AlignmentCore
{
get
{
// See llvm/lib/IR/DataLayout.cpp:[StructLayout::StructLayout]
// See llvm/include/llvm/Support/Alignment.h [Align::Align]
uint structAlignment = 1;
foreach (var field in Fields)
{
var fieldAlignment = field.MarshalType.Alignment;
if (fieldAlignment is not { } value)
return null;
structAlignment = Math.Max(structAlignment, value);
}
return structAlignment;
}
}
public override bool IsBlittable => Fields.All(x => x.MarshalType.IsBlittable && !x.IsArray && !x.HasPointer);
public bool IsFullyMapped { get; set; } = true;
private protected override IEnumerable<IExpiring> ExpiringOnItemsChange
{
get
{
yield return _fields.Expiring;
}
}
protected override void OnItemsChanged()
{
// ReSharper disable once LocalVariableHidesMember
var hasMarshalType = false;
foreach (var field in Fields)
{
if (field.Relations.Count != 0)
hasMarshalType = true;
var fieldHasMarshalType = field.PublicType != field.MarshalType
|| field.HasNativeValueType
|| field.IsArray;
// BoolToInt doesn't generate native Marshaling although they have a different marshaller
if (fieldHasMarshalType && (!field.IsBoolToInt || field.IsArray))
hasMarshalType = true;
}
hasMarshalTypeFromFields = hasMarshalType;
}
}