mbaldeh1 / monty

0x19. C - Stacks, Queues - LIFO, FIFOThe Monty language Monty 0.98 is a scripting language that is first compiled into Monty byte codes (Just like Python). It relies on a unique stack, with specific instructions to manipulate it. The goal of this project is to create an interpreter for Monty ByteCodes files.

Monty byte code files

Files containing Monty byte codes usually have the .m extension. Most of the industry uses this standard but it is not required by the specification of the language. There is not more than one instruction per line. There can be any number of spaces before or after the opcode and its argument:

julien@ubuntu:/monty$ cat -e bytecodes/000.m push 0$ push 1$ push 2$ push 3$ pall $ push 4$ push 5 $ push 6 $ pall$ julien@ubuntu:/monty$ Monty byte code files can contain blank lines (empty or made of spaces only, and any additional text after the opcode or its required argument is not taken into account:

julien@ubuntu:/monty$ cat -e bytecodes/001.m push 0 Push 0 onto the stack$ push 1 Push 1 onto the stack$ $ push 2$ push 3$ pall $ $ $ $ push 4$ $ push 5 $ push 6 $ $ pall This is the end of our program. Monty is awesome!$ julien@ubuntu:/monty$ The monty program

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, …) Tasks 0. push, pall Implement the push and pall opcodes.

1. pint Implement the pint opcode.
2. pop Implement the pop opcode.
3. swap Implement the swap opcode.
4. add Implement the add opcode.
5. nop Implement the nop opcode.
6. sub Implement the sub opcode.
7. div Implement the div opcode.
8. mul Implement the mul opcode.
9. mod Implement the mod opcode.
10. comments Every good language comes with the capability of commenting. When the first non-space character of a line is #, treat this line as a comment (don’t do anything).
11. pchar Implement the pchar opcode.
12. pstr Implement the pstr opcode.
13. rotl Implement the rotl opcode.
14. rotr Implement the rotr opcode.
15. stack, queue Implement the stack and queue opcodes.
16. Brainfck Write a Brainfck script that prints School, followed by a new line.
17. Add two digits Add two digits given by the user.
18. Multiplication Multiply two digits given by the user.
19. Multiplication level up Multiply two digits given by the user.

Authors ✒️

Muhammed Baldeh and UdohYoungPJ