An educational compiler project written in C# (discontinued)

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FlierMate

Joined: 21 Jan 2021
Posts: 73

FlierMate

Sambal programming language:

Code:

LET b= 20
b /= 2
MSGBOX b
b +=30
b -=1
MSGBOX b
LET c=40
c*= 22
MSGBOX c

Using the Sambal compiler(written in C#) will generate a Windows EXE.

This simple Win32 compiler is not using FASM as back-end compiler directly, but I reverse-engineer the PE file generated by FASM to study how to output the binary executable.

As such, the linker version is not the same with that of FASM, but dosHeader and importTable are kept intact as what have been produced by FASMW.

Admin and mods are welcome to move this topic of discussion to elsewhere if my toy programming language is irrelevant. Thanks!

PS: This is an abandoned project.

Note: Download of the compiler is no longer available. Sorry!

Last edited by FlierMate on 14 Jun 2021, 21:13; edited 12 times in total

04 Apr 2021, 15:04

Roman

Joined: 21 Apr 2012
Posts: 1058

Roman

And how compile example1.txt ?
Show example.

And what about floats nums ?
For example: a = 1.2*2+2.4

05 Apr 2021, 06:03

FlierMate

Joined: 21 Jan 2021
Posts: 73

FlierMate

Roman wrote:

And how compile example1.txt ?
Show example.

And what about floats nums ?
For example: a = 1.2*2+2.4

Thanks for your interest. Just drag the source text file and drop it on icon of Sambal.exe or use command-line:

Code:

Sambal example1.txt

Floating numbers is not supported as I am beginner to compiler scene and slow in improving the compiler. In future, iteration construct and conditional statement will be supported.

For my parser, you have to code it in something like this:

Code:

LET a=1
a *= 2
a+=3

It is far from perfect.

05 Apr 2021, 08:05

FlierMate

Joined: 21 Jan 2021
Posts: 73

FlierMate

I am having a hard time to parse code containing deeply nested conditional statement IF....THEN....ELSE. What method should I use? Binary tree? It will not be easy too to generate equivalent Assembly code with multiple jumps (especially in calculating the RVA).

05 Apr 2021, 08:33

FlierMate

Joined: 21 Jan 2021
Posts: 73

FlierMate

I see quite a few talented people write compiler that self-compile. This project is far from that level, because it is meant to learn writing a compiler in simplest way.

Example source code in Sambal programming language:
(It shows message box displaying from number 1 to number 10)

Code:

let a = 1
msgbox a
a+=1
msgbox a
a+=1
msgbox a
a+=1
msgbox a
a+=1
msgbox a
a+=1
msgbox a
a+=1
msgbox a
a+=1
msgbox a
a+=1
msgbox a
a+=1
msgbox a
msgbox good bye

I have reattached the zip file for download because it might be useful to one or two persons. Smile

PS: Previous version has wrong AddressOfEntryPoint, might crash on Windows 7. Now fixed. Sorry!

20 Apr 2021, 19:17

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