private string GetSignature(HotfixDelegateBindingInfo delegateBindingInfo, int index, string arglist, out string sig)
{
sig = "_HotfixDelegate" + index;
var str = "public delegate ";
str += this.cg.bindingManager.GetCSTypeFullName(delegateBindingInfo.returnType) + " ";
str += sig + "(";
str += arglist;
str += ");";
return(str);
}
public HotfixDelegateCodeGen(CodeGenerator cg, HotfixDelegateBindingInfo delegateBindingInfo, int index)
{
this.cg = cg;
var self_name = "_hotfix_this";
var js_push = delegateBindingInfo.isStatic ? "js_push_type" : "js_push_classvalue_hotfix";
var nargs = delegateBindingInfo.parameters.Length;
var retName = this.cg.bindingManager.GetUniqueName(delegateBindingInfo.parameters, "ret");
var firstArgument = typeof(ScriptDelegate) + " fn";
var returnTypeName = this.cg.bindingManager.GetCSTypeFullName(delegateBindingInfo.returnType);
var delegateName = CodeGenerator.NameOfHotfixDelegates + index;
var arglist = GetCSArglistDecl(delegateBindingInfo.thisType, delegateBindingInfo.isStatic, self_name, delegateBindingInfo.parameters);
string sig;
var delegateSig = GetSignature(delegateBindingInfo, index, arglist, out sig);
this.cg.cs.AppendLine(delegateSig);
this.cg.cs.AppendLine("[UnityEngine.Scripting.Preserve]");
this.cg.cs.AppendLine("[{0}(typeof({1}))]",
this.cg.bindingManager.GetCSTypeFullName(typeof(JSDelegateAttribute)),
sig);
this.cg.bindingManager.log.AppendLine("emitting delegate decl: {0}", sig);
if (!string.IsNullOrEmpty(arglist))
{
arglist = ", " + arglist;
}
this.cg.cs.AppendLine($"public static unsafe {returnTypeName} {delegateName}({firstArgument}{arglist})");
this.cg.cs.AppendLine("{");
this.cg.cs.AddTabLevel();
this.cg.cs.AppendLine("var ctx = fn.ctx;");
if (nargs > 0)
{
this.cg.cs.AppendLine("var argv = stackalloc JSValue[{0}];", nargs);
for (var i = 0; i < nargs; i++)
{
var parameter = delegateBindingInfo.parameters[i];
var pusher = this.cg.AppendValuePusher(parameter.ParameterType, parameter.Name);
this.cg.cs.AppendLine("argv[{0}] = {1};", i, pusher);
this.cg.cs.AppendLine("if (argv[{0}].IsException())", i);
using (this.cg.cs.CodeBlockScope())
{
for (var j = 0; j < i; j++)
{
this.cg.cs.AppendLine("JSApi.JS_FreeValue(ctx, argv[{0}]);", j);
}
this.cg.cs.AppendLine("throw new Exception(ctx.GetExceptionString());");
}
}
this.cg.cs.AppendLine("var this_obj = js_push_classvalue_hotfix(ctx, {0});", self_name);
this.cg.cs.AppendLine("var rval = fn.Invoke(ctx, this_obj, {0}, argv);", nargs);
this.cg.cs.AppendLine("JSApi.JS_FreeValue(ctx, this_obj);");
}
else
{
this.cg.cs.AppendLine("var this_obj = js_push_classvalue_hotfix(ctx, {0});", self_name);
this.cg.cs.AppendLine("var rval = fn.Invoke(ctx, this_obj);");
this.cg.cs.AppendLine("JSApi.JS_FreeValue(ctx, this_obj);");
}
if (delegateBindingInfo.returnType != typeof(void))
{
this.cg.cs.AppendLine($"{this.cg.bindingManager.GetCSTypeFullName(delegateBindingInfo.returnType)} {retName};");
var getter = this.cg.bindingManager.GetScriptObjectGetter(delegateBindingInfo.returnType, "ctx", "rval", retName);
this.cg.cs.AppendLine("var succ = {0};", getter);
FreeArgs(nargs);
CheckReturnValue();
this.cg.cs.AppendLine("if (succ)");
using (this.cg.cs.CodeBlockScope())
{
this.cg.cs.AppendLine($"return {retName};");
}
this.cg.cs.AppendLine("else");
using (this.cg.cs.CodeBlockScope())
{
this.cg.cs.AppendLine($"throw new Exception(\"js exception caught\");");
}
}
else
{
FreeArgs(nargs);
CheckReturnValue();
}
}