public ChildVisitResult Visit(Cursor cursor, Cursor parent)
{
if (!cursor.GetLocation().IsFromMainFile())
{
return(ChildVisitResult.Continue);
}
if (parent.Kind == CursorKind.UnionDecl)
{
return(ChildVisitResult.Continue);
}
CursorKind curKind = cursor.Kind;
if (curKind == CursorKind.StructDecl)
{
this.fieldPosition = 0;
var nativeName = cursor.GetSpelling();
// struct names can be empty, and so we visit its sibling to find the name
if (string.IsNullOrEmpty(nativeName))
{
var forwardDeclaringVisitor = new ForwardDeclarationVisitor(cursor, skipSystemHeaderCheck: true);
forwardDeclaringVisitor.VisitChildren(cursor.GetSemanticParent());
nativeName = forwardDeclaringVisitor.ForwardDeclarationCursor.GetSpelling();
if (string.IsNullOrEmpty(nativeName))
{
nativeName = "_";
}
}
var clrName = NameConversions.ToClrName(nativeName, NameConversion.Type);
this.current = new Struct()
{
Name = clrName,
Description = GetComment(cursor)
};
// This is a lazy attempt to handle forward declarations. A better way would be as described here:
// https://joshpeterson.github.io/identifying-a-forward-declaration-with-libclang
// but libclang doesn't expose clang_getNullCursor (yet)
current = this.generator.AddType(nativeName, current) as Struct;
// If the struct is in use as a 'handle', this AddType would have returned an Handle and the 'as Struct'
// statement would have cast it to null. In that case, we don't create an explicit struct.
if (current != null)
{
var visitor = new DelegatingCursorVisitor(this.Visit);
visitor.VisitChildren(cursor);
}
return(ChildVisitResult.Continue);
}
if (curKind == CursorKind.FieldDecl)
{
var fieldName = cursor.GetSpelling();
if (string.IsNullOrEmpty(fieldName))
{
fieldName = "field" + this.fieldPosition; // what if they have fields called field*? :)
}
else
{
fieldName = NameConversions.ToClrName(fieldName, NameConversion.Field);
}
this.fieldPosition++;
foreach (var member in GetFields(cursor, fieldName, this.generator))
{
this.current.Fields.Add(member);
}
return(ChildVisitResult.Continue);
}
return(ChildVisitResult.Recurse);
}
public ChildVisitResult Visit(Cursor cursor, Cursor parent)
{
if (!cursor.GetLocation().IsFromMainFile())
{
return(ChildVisitResult.Continue);
}
CursorKind curKind = cursor.Kind;
if (curKind == CursorKind.EnumDecl)
{
var nativeName = cursor.GetSpelling();
var enumComment = this.GetComment(cursor, forType: true);
// enumName can be empty because of typedef enum { .. } enumName;
// so we have to find the sibling, and this is the only way I've found
// to do with libclang, maybe there is a better way?
if (string.IsNullOrEmpty(nativeName))
{
var forwardDeclaringVisitor = new ForwardDeclarationVisitor(cursor, skipSystemHeaderCheck: true);
forwardDeclaringVisitor.VisitChildren(cursor.GetLexicalParent());
nativeName = forwardDeclaringVisitor.ForwardDeclarationCursor.GetSpelling();
if (string.IsNullOrEmpty(nativeName))
{
nativeName = "_";
}
}
var clrName = NameConversions.ToClrName(nativeName, NameConversion.Type);
Enum enumDeclaration = new Enum()
{
Name = clrName,
Description = enumComment,
BaseType = "byte"
};
// Most enums maps to bytes, with these exceptiosn
if (nativeName == "libusb_error" || nativeName == "libusb_capability")
{
enumDeclaration.BaseType = "int";
}
// Normally the enum values are prefixed with the enum name, e.g.
// enum log_level => LOG_LEVEL_DEBUG = 1
//
// However, this is not always consistent, e.g.
// enum libusb_capability => LIBUSB_CAP_HAS_CAPABILITY = 1
//
// Patch the prefix where required.
var prefix = nativeName;
var mappings = new Dictionary <string, string>();
mappings.Add("libusb_capability", "libusb_cap");
mappings.Add("libusb_class_code", "libusb_class");
mappings.Add("libusb_descriptor_type", "libusb_dt");
mappings.Add("libusb_endpoint_direction", "libusb_endpoint");
mappings.Add("libusb_hotplug_flag", "libusb_hotplug");
mappings.Add("libusb_request_recipient", "libusb_recipient");
mappings.Add("libusb_standard_request", "libusb_request");
mappings.Add("libusb_transfer_flags", "libusb_transfer");
mappings.Add("libusb_transfer_status", "libusb_transfer");
mappings.Add("libusb_bos_type", "libusb_bt");
if (mappings.ContainsKey(prefix))
{
prefix = mappings[prefix];
}
// visit all the enum values
DelegatingCursorVisitor visitor = new DelegatingCursorVisitor(
(c, vistor) =>
{
var value = c.GetEnumConstantDeclValue();
var field =
new EnumValue()
{
Name = NameConversions.ToClrName(c.GetSpelling(), prefix, NameConversion.Enum),
Value = value > 0 ? $"0x{(int)c.GetEnumConstantDeclValue():X}" : $"{value}"
};
field.Description = this.GetComment(c, forType: true);
enumDeclaration.Values.Add(field);
return(ChildVisitResult.Continue);
});
visitor.VisitChildren(cursor);
// Add a missing 'None' value
if (nativeName == "libusb_transfer_flags")
{
enumDeclaration.Values.Add(new EnumValue()
{
Name = "None",
Value = "0x0"
});
}
this.generator.AddType(nativeName, enumDeclaration);
}
return(ChildVisitResult.Recurse);
}
