LinkerConfiguration(string linker_file)
{
if (!File.Exists(linker_file))
{
throw new FileNotFoundException($"The custom linker file {linker_file} does not exist.");
}
Profile = new BaseProfile(this);
DerivedLinkContext = new DerivedLinkContext {
LinkerConfiguration = this,
};
Application = new Application(this);
Target = new Target(Application);
CompilerFlags = new CompilerFlags(Target);
var lines = File.ReadAllLines(linker_file);
var significantLines = new List <string> (); // This is the input the cache uses to verify if the cache is still valid
for (var i = 0; i < lines.Length; i++)
{
var line = lines [i].TrimStart();
if (line.Length == 0 || line [0] == '#')
{
continue; // Allow comments
}
var eq = line.IndexOf('=');
if (eq == -1)
{
throw new InvalidOperationException($"Invalid syntax for line {i + 1} in {linker_file}: No equals sign.");
}
significantLines.Add(line);
var key = line [..eq];
// type has a "public .ctor (IntPtr)" with a [CompilerGenerated] attribute
static bool IsGeneratedBindings(TypeDefinition type, DerivedLinkContext link_context)
{
if (type.IsNested)
{
return(IsGeneratedBindings(type.DeclaringType, link_context));
}
if (!type.HasMethods)
{
return(false);
}
foreach (MethodDefinition m in type.Methods)
{
if (!m.IsConstructor)
{
continue;
}
if (!m.HasParameters)
{
continue;
}
if (m.Parameters.Count != 1)
{
continue;
}
if (!m.Parameters [0].ParameterType.Is("System", "IntPtr"))
{
continue;
}
return(m.IsGeneratedCode(link_context));
}
return(false);
}
// warning: *Is* means does 'type' inherits from MonoTouch.Foundation.NSObject ?
public static bool IsNSObject(this TypeDefinition type, DerivedLinkContext link_context)
{
if (link_context?.CachedIsNSObject != null)
{
return(link_context.CachedIsNSObject.Contains(type));
}
return(type.Inherits(Namespaces.Foundation, "NSObject"));
}
public static bool IsDirectBindingCheckRequired(this TypeDefinition type, DerivedLinkContext link_context)
{
if (link_context.NeedsIsDirectBindingCheck == null)
{
return(true);
}
return(link_context.NeedsIsDirectBindingCheck.Contains(type));
}
public static bool IsNSObject(this TypeReference type, DerivedLinkContext link_context)
{
return
(#if NET
link_context.LinkerConfiguration.Context.Resolve(type)
#else
type.Resolve()
#endif
.IsNSObject(link_context));
}
public static bool IsGeneratedCode(this MethodDefinition self, DerivedLinkContext link_context)
{
// check the property too
if (self.IsGetter || self.IsSetter)
{
if (HasGeneratedCodeAttribute(GetPropertyByAccessor(self), link_context))
{
return(true);
}
}
return(HasGeneratedCodeAttribute(self, link_context));
}
void ProcessType(TypeDefinition type, DerivedLinkContext context)
{
if (type.IsNSObject(context))
{
ProcessNSObject(type);
}
else if (type.HasNestedTypes)
{
foreach (var nested in type.NestedTypes)
{
ProcessType(nested, context);
}
}
}
public static bool IsOptimizableCode(this MethodDefinition self, DerivedLinkContext link_context)
{
if (IsBindingImplOptimizableCode(self, link_context))
{
return(true);
}
if (!Driver.IsXAMCORE_4_0 && IsGeneratedCode(self, link_context))
{
return(true);
}
return(false);
}
public static bool?GetIsDirectBindingConstant(this TypeDefinition type, DerivedLinkContext link_context)
{
if (link_context?.IsDirectBindingValue == null)
{
return(null);
}
bool?value;
if (link_context.IsDirectBindingValue.TryGetValue(type, out value))
{
return(value);
}
return(null);
}
public static bool IsBindingImplOptimizableCode(this MethodDefinition self, DerivedLinkContext link_context)
{
var attrib = GetBindingImplAttribute(self, link_context);
if ((attrib & BindingImplOptions.Optimizable) == BindingImplOptions.Optimizable)
{
return(true);
}
// Check the property too
if (self.IsGetter || self.IsSetter)
{
attrib = GetBindingImplAttribute(GetPropertyByAccessor(self), link_context);
if ((attrib & BindingImplOptions.Optimizable) == BindingImplOptions.Optimizable)
{
return(true);
}
}
return(false);
}
public static bool IsNSObject(this TypeReference type, DerivedLinkContext link_context)
{
return(type.Resolve().IsNSObject(link_context));
}
static bool HasGeneratedCodeAttribute(ICustomAttributeProvider provider, DerivedLinkContext context)
{
return(provider.HasCustomAttribute(context, "System.Runtime.CompilerServices", "CompilerGeneratedAttribute"));
}
// This method will look in any stored attributes in the link context as well as the provider itself.
public static bool HasCustomAttribute(this ICustomAttributeProvider provider, DerivedLinkContext context, string @namespace, string name)
{
if (provider?.HasCustomAttribute(@namespace, name) == true)
{
return(true);
}
return(context?.GetCustomAttributes(provider, @namespace, name)?.Count > 0);
}
static BindingImplOptions?GetBindingImplAttribute(ICustomAttributeProvider provider, DerivedLinkContext context)
{
if (provider != null && provider.HasCustomAttributes)
{
var rv = GetBindingImplAttribute(provider, provider.CustomAttributes);
if (rv != null)
{
return(rv);
}
}
return(GetBindingImplAttribute(provider, context?.GetCustomAttributes(provider, Namespaces.ObjCRuntime, "BindingImplAttribute")));
}