Code translation in C#

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3.67/5 (2 votes)

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Well let's say I have this bunch of code :

Console.WriteLine("Hello World");

What I want my program (in C#) to do is translate this code to :

mov si,mystring
call print_string
mystring db 'Hello World'

Is there any simple way to do that? (If not then complex ways are also okay)
Any help would be appreciated.....
~Sids123

Posted 17-Aug-13 0:18am

sid2x

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OriginalGriff · Accepted Answer · 2013-08-17T00:29:00

Solution 1

C# does not compile directly to native code - it compiles to an Intermediate Language which is later converted to the native instructions by the JIT compiler.

If you what to view the IL, that's one thing - and it's easy enough to do - but you can't look at the native code because it isn't stored with the source.

If you actually want process the string "Console.WriteLine("Hello World");" in your application and convert it to executable instructions, then you basically have to write a C# compiler, and provide pretty much the whole of .NET (Or at least a large percentage of it) in order to support the code you generate - and even print_string isn't a trivial exercise! It's a lot of work, but you will find many, many books on compiler writing - Google will help there.

Posted 17-Aug-13 0:29am

OriginalGriff

Comments

sid2x 17-Aug-13 6:46am

Thanks OriginalGriff, But I am not writing a compiler,There are just 5-6 commands that I want to
translate like that, really sorry if I didn't specify that...

OriginalGriff 17-Aug-13 7:05am

It doesn't matter if you want to "translate" 5 or six command s- you still need to do a fair amount of the same work, unless you do a brute-force-and-ignorance approach and just look explicitly in the string for the fixed strings - but that can get to be a nightmare if you actually parse code looking for the stuff, because code does not have to be "neat and tidy" and exactly the way you expect.

What are you actually trying to achieve with this approach? There may be a better way.

sid2x 17-Aug-13 7:07am

So any recommendations to start with?......

OriginalGriff 17-Aug-13 7:11am

Depends I guess on what you are trying to achieve...why are you trying to do this?

sid2x 17-Aug-13 7:18am

To be honest I am coding an Operating System in Assembly, So far it can read and write files, run binary files
that are compiled by NASM, It now has 5 system calls one of them is print_string I am trying to do this because it would be easy for me to build applications. That's the truth. I could write this thing in Assembly but I am trying to do this in a high level language like C#.

OriginalGriff 17-Aug-13 7:28am

Wow! Serious kudos for coding your own OS in assembler - that is a lot of work.

I wouldn't start with C#: as I said, it comes with a heck of a lot of "baggage" - the .NET framework - of which it needs a significant chunk in order to do anything. Instead, think about C instead - it's a lot, lot simpler, and better fitted to assembler anyway.

To be honest, you could probably get away with a couple of string parsing routines to do the mechanics of what you are asking for, but there are a number of open-source C compilers already targeted at the X86 instruction set, which would provide the mechanics of what you want with a lot less effort - you would have to code the library stuff that interfaces with your OS, but you would end up with a much more flexible and usable base for your future code. Then, you could look at porting MONO to your OS to get C# working (though that would be a mammoth task, and it's quite possible you would need a stepping stone up to C++).

Haven't written anything like an OS for years - probably because I remember how much work is involved! :laugh:

sid2x 17-Aug-13 7:36am

Os development is worse than I imagined, Firstly I did a mistake of using GRUB, after getting away with those print functions in C, I realised that I had to write my own Keyboard drivers, mouse drivers and the API's for them.
Then I found out a way to skip all this, boot my OS in real mode, but all in vain I realised that there a are a LOT of restrictions in real mode. So resumed the idea of using GRUB and right now it's in a good state has working FAT16, ELF loaders, ability to store data etc. Thanks! Rated 5/5

OriginalGriff 17-Aug-13 7:47am

You won't be the first person to look at an OS and think "well, how hard *can* it be?" :laugh:
Just printing characters (or even straight bloody lines) on a graphics display from scratch is a load of work! As I said - serious kudos!
I upvoted your question in appreciation of your efforts.

sid2x 17-Aug-13 7:59am

I need to get off my PC now, Need to study calculus which is harder than making a Computer Processor :laugh:

OriginalGriff 17-Aug-13 8:03am

I'm with you on that - I started Uni on a "Math and Computer Science" course, then dropped the math half at the end of the first year as way, way, too much like hard work! :laugh: