42sh

Description

42sh is an Epitech project, where you need to re-create an entire terminal from scratch in C language, using Lib C functions.

Requierements

You will need to have gcc and make installed on your computer.
You need to be in a Linux OS.

Installation

Manual installation

Follow this 2 simple steps :

1. Clone the repo using this command :
   git clone https://github.com/EpitechPromo2027/B-PSU-200-PAR-2-1-42sh-max.houdouin

2. Enter the repository and build the file using make :
   cd B-PSU-200-PAR-2-1-42sh-max.houdouin/ && make -s re

You can now run 42sh by executing ./42sh.

Grof

Grof is the 42sh scripting language (drafted).

How to code

Your code is interpreted in the terminal, it is not an external program.

Variables

Variables have types in intern, but the language is autotyped. Here are all the different types :

Number	Type	Description
0	nil	For no type
1	number	For any number (3 or 3.1)
2	boolean	true or false
3	string	beggins and ends with "
4	table	beggins with {

To declare a variable, you need to declare it with the exp keyword, followed by Key = Value style, separated by spaces or tabulations.

For example :

exp a = 10

Sets the value of a to 10.

You can also do additions :

exp a = 1 + 3.14 + 12

Will correctly sets the variable at 16.14.

It also works with string (not very operationnal) :

exp a = "hello" + "world"

Will make the a's value sets to "hello""world".

The type of the variable when you do arithmetics operations depends on the type of the first operand.
Here are some example :
3 + "hello" : will be a NUMBER, since the first operand is 3, it will be set at 3 + 0.
"hello" + 3 : will be a STRING, since the first operand is "hello", it will be set at "hello"3

Builtins functions

Builtins function are functions already coded in the language.

To call them, simply do <builtin>(<args>...).

exec(...)

Execute what is inside of it with the 42sh terminal :

exec(ls | cat)

Will execute the ls | cat command and display the result.

print(...)

Will print every parameters separated by a , :

exp a = 1 print(a, "foo", a + 1, b)

Will print the value of a (which is 1), then "foo" string, tha a value plus 1, which is 1 + 1 which is 2, and finally, the b value that doesnt exists, so it will be set at nil.

Loops

The for loop will execute grof code the amount given.
Here is how the for loop is built :

for <key> = <begin>, <end>, <step?> do <code> end

So the key will start at the begin value, and will goes all the way up or down to the end value, jumping from step to step.

• key : soon
• begin : the key origin value
• end : when it stops
• step?: this is optional. If you don't give a step, it will be 1 if end is greater than begin, and -1 otherwise. If you give a step, it will simply increment or decrement each turn.

Here are some examples :

for a = 1, 10 do print(a) end
> 1 2 3 5 6 7 8 9

for a = 6, 2 do print(a) end
> 6 5 4 3

for a = 0, 10, 2 do print(a) end
> 0 2 4 6 8

Our Dream Team

	Alexandre Odriosolo

	Paul Parisot

	Max Houdouin

	Gregoire Lan Tim

	Elise Pipet