Would you QA my JSON library? C++

Last time when I posted my math library here I got some really good feedback, so I'll do it again.

Absolutely everything that my company does is done in JSON. My main project has 3 JSON parsers for various things (don't ask why I used 3 of them, speed reasons.) I wanted to unify everything in my cleanup, so I wrote a JIT JSON library, which is far faster than anything else I've used. But since I use JSON so much, I'd like to have more than just myself QA it. It would be nice if you could try my library from source code, I put methods in main.cpp for loading text files and testing from a string to make it easier :)

Let me know if you find a way to make it crash or behave incorrectly. Or if you have comments about my code. :)

Hey, I can hear Replicon yelling at me through the computer. :P I know what you're saying, but I have to use opaque pointers because the library will be used in every language from C, to Visual Basic, to Fortran :D

If you wanna do a speed test with a huge JSON file, that'd be cool, but JSON_Parse doesn't parse everything at once, it's JIT, so doing a JSON_Write will cause the entire thing to get parse ;)

*If loading a file, white space is ignored, it's a bug in the file loader, not the JSON engine.

:)

EDIT: Just uploaded a new one, this one has an option to format the output

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Originally Posted by ninja9578

Hey, I can hear Replicon yelling at me through the computer. :P I know what you're saying, but I have to use opaque pointers because the library will be used in every language from C, to Visual Basic, to Fortran :D

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LOL I'm flattered :D

I haven't looked at this yet, but I was thinking I might inquire as to why you needed to re-invent the wheel (there has GOT to be a solid, commonly-used, open source JSON C++ library out there by now, which you might have contributed to with whatever was missing).

Actually, there are scores of JSON libraries: http://www.json.org/

But they are insanely slow. Why is it that all of my XML parsers go 3x faster than any JSON libraries, even though JSON is a simpler syntax? The one I wrote ran circles around all of the other ones. Plus they were bloated and has features that I'm sure no one has ever used. And since I release an upgrade every day, I'd like my upgrades to be as small as possible.

Secondly, we have an object oriented database and the servers return objects as JSON. I usually only need to use about 20% of the JSON that comes back, so I wanted an on-the-fly parser, which didn't seem to exist.

Ooo on the fly is pretty neat. I just hope you're performance-optimizing in the right place :)

That's why I've posted it :P I think it's pretty well optimized, it seems really fast to me :)

I also hated that all of the other parsers that I looked at spent a lot of time verifying the JSON (in order to verify, you gotta parse the whole thing,) and my company servers either return valid json or a 404.

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Originally Posted by ninja9578

That's why I've posted it :P I think it's pretty well optimized, it seems really fast to me :)

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I meant, on the greater scheme of things, I hope writing this super-fast JSON parser was the right place to optimize your overall app/platform. :)

Seeing that the main file it loads is JSON (usually, sometimes XML uhg) and makes 20-1000 web requests per session, all returning JSON; I think it's pretty good for overall optimization :P