🎉 Celebrating 25 Years of GameDev.net! 🎉

Not many can claim 25 years on the Internet! Join us in celebrating this milestone. Learn more about our history, and thank you for being a part of our community!

Back to AngelCode

IO Streams

Suudy · 2005-08-10T14:28:27

I'm using the IO streams class addon submitted by Sam Cragg. But I have a few questions on the operation of the scripting engine. First, I've modified the code to allow output to a file, or to std::cout when no file is specified. I also had to make some other modifications to get around the MiniGW issues with the offsetof() macros on non-POD types. But essentially it is the same. So, I have the following script: void main() { ofstream test; test << "This is a test: " << 55 << std.endl; } I put in a debug statement into each constructor of the ofstream to print when it is called. The constructors are simple: asCOScriptStream::asCOScriptStream() { std::cout << "Creating default ostream" << std::endl; _stream = &std::cout; } asCOScriptStream::asCOScriptStream(const std::string& fn) { std::cout << "Creating ostream (filename: " << fn << ")" << std::endl; _stream = new std::ofstream(fn.c_str()); } When run, I get the following output: Creating default ostream Creating default ostream This is a test: Destroying ostream Creating default ostream 55Destroying ostream Creating default ostream Destroying ostream Destroying ostream I understand where the first default ostream comes from. The statement "ofstream test;" creates a default ostream. What gets me is the 3 other calls. I think they are temporaries from the insert operators being called. So, here's the problem. I wanted to derive a class from the ofstream class that dumps the insert operator output to the console as well as to a file. The idea is that it creates visible and file log output. I did the following: I registered a new global property of type ofstream pointing to an instance of the newly derived class, i.e.: DerivedCOScriptStream* ptr = new DerivedCOScriptStream("test.log"); engine->RegisterGlobalProperty("ofstream cout", ptr); I know that Angelscript will be calling member functions via a pointer to the base type, COScriptStream (via a call to a template inserter function), so all the write functions (and the destructor) are virtual. However, the creation of temporaries messes things up (of course). Is there a way to do what I'm trying? Or am I going to have to register a completely new class, and all the insertion operators?

AngelCode Affiliates

Started by Suudy August 05, 2005 11:51 AM

9 comments, last by WitchLord 18 years, 10 months ago

WitchLord

4,838

August 10, 2005 02:28 PM

I'm very pleased that you feel that way. [grin]

Now I just need to come up with a product that I can actually make some money on, so that I can make my living doing this. :)

AngelCode.com - game development and more - Reference DB - game developer references
AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

🎉 Celebrating 25 Years of GameDev.net! 🎉

IO Streams

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

🎉 Celebrating 25 Years of GameDev.net! 🎉

IO Streams

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

Reticulating splines