public void RegisterCandidates(TypeMapper mapper, List <CppFunction> functions)
{
string[] prefixes = { "Is", "Has", "Get" };
foreach (var f in functions)
{
var pi = new PropertyInfo(mapper);
string name = mapper.RenameForApi(f.Name, true);
string prefix = prefixes.FirstOrDefault(p => name.StartsWith(p));
if (prefix != null)
{
if (f.Parameters.Count == 0 && !f.IsConstructor)
{
pi.GetterFunction = f;
pi.GettetApiName = name;
pi.PropertyName = name.Remove(0, prefix.Length);
// looking for setter:
CppFunction setter = functions.FirstOrDefault(sf => sf.Parameters.Count == 1 && mapper.RenameForApi(sf.Name, true).StartsWith("Set"));
if (setter != null && f.IsStatic() == setter.IsStatic() && !setter.IsConstructor)
{
pi.SetterFunction = setter;
pi.SetterApiName = mapper.RenameForApi(setter.Name, true);
}
}
}
_candidates.Add(pi);
}
}
/// <param name="dllImportPath">will be used as the first argument in [DllImport]. Can be a path to some constant</param>
public static void Generate(TypeMapper mapper, TemplateManager templateManager, string @namespace, string dllImportPath, string outCFile, string outCsFile)
{
var csFileSb = new StringBuilder();
var cFileSb = new StringBuilder();
foreach (CppClassContainer cppClass in mapper.GetAllClasses())
{
// Header for C types:
cFileSb.AppendLine();
cFileSb.AppendLine();
cFileSb.Append("/************* ");
cFileSb.Append(cppClass.IsGlobal ? "Global functions:" : cppClass.Class.GetFullTypeName());
cFileSb.Append(" *************/");
cFileSb.AppendLine();
cFileSb.AppendLine();
var csDllImportsSb = new StringBuilder();
var csApiSb = new StringBuilder();
var allFunctions = new List <CppFunction>();
// filter out functions we are not going to bind:
foreach (var function in cppClass.Functions)
{
if (function.Visibility == CppVisibility.Private)
{
continue;
}
if (mapper.IsMethodMarkedAsUnsupported(function) ||
!mapper.IsSupported(function.ReturnType.GetDisplayName()) ||
!function.Parameters.All(p => mapper.IsSupported(p.Type.GetDisplayName())) ||
function.IsOperator() ||
function.IsCopyConstructor())
{
cFileSb.AppendLine($"//NOT_BOUND:".PadRight(32) + function);
continue;
}
allFunctions.Add(function);
}
var propertyGenerator = new PropertyGenerator();
propertyGenerator.RegisterCandidates(mapper, allFunctions);
foreach (CppFunction function in allFunctions)
{
// Type_MethodName_argsMask
string flatFunctionName = $"{cppClass.Name}_{function.Name}_{function.ParametersMask()}";
var cfunctionWriter = new FunctionWriter();
var dllImportWriter = new FunctionWriter();
var apiFunctionWriter = new FunctionWriter();
dllImportWriter
.Attribute($"[DllImport({dllImportPath}, CallingConvention = CallingConvention.Cdecl)]")
.Private()
.Static()
.Extern();
apiFunctionWriter
.SummaryComment(function.Comment?.ChildrenToString());
var propertyInfo = propertyGenerator.AsPropertyCandidate(function);
if (propertyInfo == null)
{
apiFunctionWriter.Public();
}
else
{
// TODO: convert to properties
//apiFunctionWriter.Private();
//csApiSb.AppendLine(propertyInfo.GenerateProperty().Tabify(2));
apiFunctionWriter.Public();
}
if (function.IsStatic() || cppClass.IsGlobal)
{
apiFunctionWriter.Static();
}
if (function.IsConstructor)
{
cfunctionWriter.ReturnType(cppClass.Class.GetFullTypeName() + "*", "EXPORTS", 32);
dllImportWriter.ReturnType(nameof(IntPtr));
}
else
{
cfunctionWriter.ReturnType(function.ReturnType.GetFullTypeName(), "EXPORTS", 32);
dllImportWriter.ReturnType(mapper.NativeToPinvokeType(function.ReturnType));
apiFunctionWriter.ReturnType(mapper.MapToManagedApiType(function.ReturnType));
}
cfunctionWriter.MethodName(flatFunctionName);
dllImportWriter.MethodName(flatFunctionName);
apiFunctionWriter.MethodName(mapper.RenameForApi(function.Name, isMethod: !function.IsConstructor));
if (!function.IsConstructor &&
!function.IsStatic() &&
!cppClass.IsGlobal)
{
// all instance methods will have "this" as the first argument
cfunctionWriter.Parameter(cppClass.Class.GetFullTypeName() + "*", "target");
dllImportWriter.Parameter(nameof(IntPtr), "target");
}
foreach (var parameter in function.Parameters)
{
cfunctionWriter.Parameter(
parameter.Type.GetDisplayName(),
parameter.Name);
dllImportWriter.Parameter(
mapper.NativeToPinvokeType(parameter.Type),
mapper.EscapeVariableName(parameter.Name));
apiFunctionWriter.Parameter(
mapper.MapToManagedApiType(parameter.Type),
mapper.EscapeVariableName(parameter.Name));
}
// append "return" if needed
cfunctionWriter.BodyStart();
if (cppClass.IsGlobal)
{
// GlobalMethod
cfunctionWriter.BodyCallMethod(function.Name);
}
else if (!function.IsConstructor && !function.IsStatic())
{
// target->InstanceMethod
cfunctionWriter.BodyCallMethod($"target->{function.Name}");
}
else if (function.IsStatic())
{
// Class1::StaticMethod
cfunctionWriter.BodyCallMethod(cppClass.Class.GetFullTypeName() + "::" + function.Name);
}
else
{
// new Class1
cfunctionWriter.BodyCallMethod($"new {cppClass.Class.GetFullTypeName()}");
}
if (function.IsConstructor)
{
apiFunctionWriter
.BaseCtor("ownsHandle: true")
.StartExpressionBody()
.BodyCallMethod("SetHandle");
}
else
{
apiFunctionWriter.StartExpressionBody();
}
if (mapper.IsKnownNativeType(function.ReturnType))
{
// call "ctor(IntPtr, bool)"
apiFunctionWriter.BodyCallMethod("new " + mapper.MapToManagedApiType(function.ReturnType));
}
// some API functions need special casts, e.g. IntPtr/*size_t*/ (nint) to long
if (mapper.NeedsCastForApi(function.ReturnType, out string returnTypeApiCast))
{
apiFunctionWriter.BodyCallMethod(returnTypeApiCast);
}
apiFunctionWriter.BodyCallMethod(flatFunctionName);
// all API functions pass "Handle" property as the first argument to DllImport methods
if (!function.IsConstructor && !cppClass.IsGlobal && !function.IsStatic())
{
apiFunctionWriter.PassParameter("Handle");
}
foreach (var parameter in function.Parameters)
{
cfunctionWriter.PassParameter(parameter.Name);
string dllImportType = mapper.NativeToPinvokeType(parameter.Type);
string escapedName = mapper.EscapeVariableName(parameter.Name);
if (parameter.Type.IsBool()) // bool to byte
{
escapedName = $"(Byte)({escapedName} ? 1 : 0)";
}
// cast to DllImport's type if needed (TODO: wrap with checked {})
else if (dllImportType.Contains("/*"))
{
escapedName = $"({dllImportType.DropComments()}){escapedName}";
}
// if the parameter is a C# class-wrapper - pass its Handle
else if (mapper.IsKnownNativeType(parameter.Type))
{
escapedName = $"({escapedName} == null ? IntPtr.Zero : {escapedName}.Handle)";
}
apiFunctionWriter.PassParameter(escapedName);
}
if (function.ReturnType.IsBool())
{
csApiSb.AppendLine(apiFunctionWriter.Build(" > 0").Tabify(2)); // byte to bool
}
else if (mapper.IsKnownNativeType(function.ReturnType))
{
// pass "false" to "ownsHandle" argument
apiFunctionWriter.EndLastCall(true).PassParameter("false");
csApiSb.AppendLine(apiFunctionWriter.Build().Tabify(2));
}
else
{
csApiSb.AppendLine(apiFunctionWriter.Build().Tabify(2));
}
csApiSb.AppendLine();
csDllImportsSb.AppendLine(dllImportWriter.BuildWithoutBody().Tabify(2));
csDllImportsSb.AppendLine();
cFileSb.AppendLine(cfunctionWriter.Build());
}
if (cppClass.IsGlobal)
{
csFileSb.Append(templateManager.CSharpGlobalClass(csDllImportsSb.ToString(), csApiSb.ToString(), dllImportPath));
}
else if (!cppClass.IsGlobal)
{
csFileSb.Append(templateManager.CSharpClass(mapper.RenameForApi(cppClass.Name, false), cppClass.Name, csDllImportsSb.ToString(), csApiSb.ToString(), dllImportPath));
// Append "delete" method:
// EXPORTS(void) %class%_delete(%class%* target) { if (target) delete target; }
var cfunctionWriter = new FunctionWriter();
cfunctionWriter.ReturnType("void", "EXPORTS", 32)
.MethodName(cppClass.Name + "__delete")
.Parameter(cppClass.Class.GetFullTypeName() + "*", "target")
.BodyStart()
.Body("delete target");
cFileSb
.AppendLine(cfunctionWriter.Build());
}
}
File.WriteAllText(outCFile, templateManager.CHeader() + cFileSb);
File.WriteAllText(outCsFile, templateManager.CSharpHeader(@namespace, csFileSb.ToString()));
}
