public static TRet Call <TRet>(this ISquirrelApi squirrelApi, AnsiString functionName, params object[] parameters)
{
if (squirrelApi == null)
{
throw new ArgumentNullException(nameof(squirrelApi));
}
if (functionName == null)
{
throw new ArgumentNullException(nameof(functionName));
}
if (parameters == null)
{
throw new ArgumentNullException(nameof(parameters));
}
// Get the stack top index
int top = squirrelApi.SqGetTop();
try
{
// Get the function
squirrelApi.SqPushRootTable();
squirrelApi.SqPushString(functionName.Unmanaged, functionName.Length);
if (!squirrelApi.SqGet(-2))
{
throw new SquirrelException(
$"The gothic online server function '{functionName}' could not be found in the root table",
squirrelApi);
}
// Call the function
squirrelApi.SqPushRootTable();
foreach (var parameter in parameters)
{
squirrelApi.PushValue(parameter);
}
if (!squirrelApi.SqCall(parameters.Length + 1, true, false))
{
throw new SquirrelException($"The call to the '{functionName}' function failed", squirrelApi);
}
if (typeof(TRet) == typeof(string))
{
string value;
squirrelApi.SqGetString(squirrelApi.SqGetTop(), out value);
return((TRet)(object)value);
}
else if (typeof(TRet) == typeof(int))
{
int value;
squirrelApi.SqGetInteger(squirrelApi.SqGetTop(), out value);
return((TRet)(object)value);
}
else if (typeof(TRet) == typeof(float))
{
float value;
squirrelApi.SqGetFloat(squirrelApi.SqGetTop(), out value);
return((TRet)(object)value);
}
else if (typeof(TRet) == typeof(bool))
{
bool value;
squirrelApi.SqGetBool(squirrelApi.SqGetTop(), out value);
return((TRet)(object)value);
}
else if (typeof(TRet) == typeof(IntPtr))
{
IntPtr value;
squirrelApi.SqGetUserPointer(squirrelApi.SqGetTop(), out value);
return((TRet)(object)value);
}
else
{
throw new NotSupportedException(
$"The given type argument '{typeof(TRet).Name}' is not supported as the return value of a squirrel function.");
}
}
finally
{
// Set back top
squirrelApi.SqSetTop(top);
}
}