monty is an interpreter for Monty ByteCodes files, which is a scripting language just like Python.
This is a language that contains specific instructions to manipulate data information (stacks or queues). Each instruction (called opcode) are called opcodes and are sent once per line in the file containing the bytecodes. This files have extension .m, this is not neccessary as it is just a naming convention.
Example (monty.m):
$ cat monty.m
# Push elements to the stack
push 1
push 2
push 3
# Printing all elements
pall
push 4
push 5
# Remove/pop last element
pop
# Print all elements again
pall
# Print the last element on the stack
4- Interpreter was written with C language
- C files are compiled using
gcc 4.8.4 - C files are written according to the C90 standard
- Tested on Ubuntu 20.04 LTS
To compile all files:
$ gcc -Wall -Werror -Wextra -pedantic *.c -o monty
$The synopsis of the interpreter is the following:
$ ./monty [filename]
$To run the interpreter:
$ ./monty file.m
1
2
3
1
2
3
4
$monty executes the following opcodes:
| Opcode | Description |
|---|---|
push |
Pushes an element to the stack |
pall |
Prints all the values on the stack |
pint |
Prints the value at the top of the stack |
pop |
Removes the top element of the stack |
Comments, indicated with #, are not executed by the interpreter.
When a nonextistent opcode is passed, the interpreter prints an error message and stops:
$ cat errorfile.m
push 1
pall
pushe 2
$ ./monty errorfile.m
1
L3: unknown instruction pusheWhen there is no errors, monty returns 0. Otherwise, returns 1
- Timothy Adeleke
- Omotayo Omotosho