/monty

Primary LanguageC

Description

Team Project to practice implementation of stacks and queues by building an interpreter for the monty scripting language.

Table of Contents đź“‚

Monty

The Monty language :

Monty is a programming and scripting language.
This language was designed by David A. Watt.

Usage :

  • monty file : where file is the path to the file containing Monty byte code

  • If the user does not give any file or more than one argument to your program, print the error message USAGE: monty file, followed by a new line, and exit with the status EXIT_FAILURE.

  • If, for any reason, it’s not possible to open the file, print the error message Error: Can't open file , followed by a new line, and exit with the status EXIT_FAILURE
    where is the name of the file

  • If the file contains an invalid instruction, print the error message L<line_number>: unknown instruction , followed by a new line, and exit with the status EXIT_FAILURE
    where is the line number where the instruction appears.
    Line numbers always start at 1

  • The monty program runs the bytecodes line by line and stop if either:
    it executed properly every line of the file
    it finds an error in the file an error occured

  • If you can’t malloc anymore, print the error message Error: malloc failed, followed by a new line, and exit with status EXIT_FAILURE.

  • You have to use malloc and free and are not allowed to use any other function from man malloc (realloc, calloc, …)

Operations : List of monty operations this interpreted understands:

  • push <integer>: pushes an integer on to the stack
  • pall: prints the values of every node on the stack
  • pint: prints the value of the node at the top of the stack
  • pop: removes the node at the top of the stack
  • swap: swaps the position of the top two nodes
  • add: places the sum of the top two nodes into the 2nd node and removes the first
  • sub: subtracts the top element of the stack from the second top element of the stack
  • div: divides the second top element of the stack by the top element of the stack
  • mul: multiples the second top element of the stack with the top element of the stack
  • mod: computes the rest of the division of the second top element of the stack by the top element of the stack
  • pchar: prints the char at the top of the stack, followed by a new line
  • pstr: prints the string starting at the top of the stack, followed by a new line
  • rotr: rotates the stack to the bottom
  • rotl: opcode rotate the stack to the top
File Name Description :
main.c Main program file
monty.h Header file
get_op_func.c function selects the correct func to perform the operation
_pall.c opcode print all the values on the stack, starting from the top
_pint.c opcode print the value at the top of the stack
_push.c opcode pushe an element to the stack
_swap.c opcode swap the top two elements of the stack
_add.c opcode add the two tops elements of the stack
_sub.c opcode subtract the top element of the stack from the second top element of the stack
_div.c opcode divide the second top element of the stack by the top element of the stack
_mul.c opcode multiple the second top element of the stack with the top element of the stack
_mod.c opcode compute the rest of the division of the second top element of the stack by the top element of the stack
_pchar.c opcode print the char at the top of the stack, followed by a new line
_pstr.c opcode print the string starting at the top of the stack, followed by a new line
_rotr.c opcode rotate the stack to the bottom
_rotl.c opcode rotate the stack to the top

General :
What do LIFO and FIFO mean?

FIFO stand for First In First Out

LIFO stand for Last In First Out

Requirements :
Allowed editors: vi, vim, emacs
All your files will be compiled on Ubuntu 20.04 LTS using gcc, using the options -Wall -Werror -Wextra -pedantic -std=c90
All your files should end with a new line
A README.md file, at the root of the folder of the project is mandatory
Your code should use the Betty style. It will be checked using betty-style.pl and betty-doc.pl
You allowed to use a maximum of one global variable
No more than 5 functions per file
You are allowed to use the C standard library
The prototypes of all your functions should be included in your header file called monty.h
Don’t forget to push your header file
All your header files should be include guarded
You are expected to do the tasks in the order shown in the project

Compilation & Output :

typedef struct stack_s
    {
    int n;
    struct stack_s *prev;
    struct stack_s *next;
    } stack_t;


typedef struct instruction_s
    {
    char *opcode;
    void (*f)(stack_t **stack, unsigned int line_number);
    } instruction_t;

Compilation & Output :

Your code will be compiled this way :
    $ gcc -Wall -Werror -Wextra -pedantic -std=c90 *.c -o monty

Authors C.Le Sauter - G.Coudrin - S.Badyine for Holberton School Paris