https://github.com/pent0/csnack
Work in progress scripting language compiler, decompiler and interpreter
https://github.com/pent0/csnack
Last synced: about 1 year ago
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Work in progress scripting language compiler, decompiler and interpreter
- Host: GitHub
- URL: https://github.com/pent0/csnack
- Owner: pent0
- Created: 2018-08-09T18:04:32.000Z (almost 8 years ago)
- Default Branch: master
- Last Pushed: 2018-08-13T14:47:27.000Z (almost 8 years ago)
- Last Synced: 2025-01-30T00:26:51.465Z (over 1 year ago)
- Language: C++
- Homepage:
- Size: 69.3 KB
- Stars: 1
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
## Snack
- Snack is a simple, non object-orientied scripting language, with fast lexing and parsing language, design
for scripting emulator events.
- Some emulator events are scripted. For example: some panic are extracted with script. Recompiling
custom panic extraction in C++ code takes really long times considering how roundy libraries are depend
on each other, so scripting is a fun way to not recompiling but still provide fast speed.
- Snack is an extra dependency. User can write custom frontend (jit, etc..) to run the AST tree, and write custom
unit (library) for the language
## CSnack
- This repo contains source code for CSnack, Snack compiler, decompiler and interpreter. Snack and CSnack is written in 5 days,
and this is the result.
- Please traverse to **specs** to read more about the design of CSnack and Snack.
## What is working now, and what to do
- Basic stuffs are done. Loading a host handcoded unit is supported, calling function and do basic variable allocation.
- Arrays, loops, conditional statement are implemented. Array is reference object, design is currently allowed for class and struct.
- There is no struct defintion yet, calling *std.* is prohibited.
## Example script:
```python
uses std
fn max(a, b):
if a > b:
ret a
ret b
fn test:
var a = 6
var b = 7 + max(5, 6)
var c = new array(12, 15, 27)
for var i = 0; i < length(c); i+=1:
print('{} ', c[i])
fn main:
test()
```
## Analys result
```
IR emitted:
met 2 0x171
ldarg 0x0
ldarg 0x1
cgt
brf 0x23
ldarg 0x0
ret
ldarg 0x1
ret
endmet
met 0 0x17e
ldcst 0x1c5
strlc 0x0
ldcst 0x1d9
ldcst 0x1c5
ldcst 0x1cf
call 7fff 0
add
strlc 0x1
newarr
strlc 0x2
ldlc 0x2
ldcst 0x1a7
ldcst 0x1bb
strelm
ldlc 0x2
ldcst 0x1e3
ldcst 0x1ed
strelm
ldlc 0x2
ldcst 0x1b1
ldcst 0x1f7
strelm
ldlc 0x2
strlc 0x2
ldcst 0x1a7
strlc 0x3
ldlc 0x3
ldlc 0x2
call 0 4
clt
brf 0xf1
ldlc 0x2
ldlc 0x3
ldelm
ldcststr 0x18c
call 0 0
ldlc 0x3
ldcst 0x1e3
add
strlc 0x3
br 0xa5
endmet
met 0 0x199
call 7fff 1
endmet
strdata max
strdata test
strdata {}
strdata main
idata 0
idata 2
idata 12
idata 6
idata 5
idata 7
idata 1
idata 15
idata 27
Used unit
std
Interpreted result:
12 15 27
```