Monty monty is an interpreter of Monty ByteCodes files, which is a scripting language just like Python.
About the Monty language This is a language that contains specific instructions to manipulate data information (stacks or queues), where each instruction (called opcode) is sended per line. Files which contains Monty byte codes usually have the .m extension.
Example (file.m):
$ cat file.m
Pushing element to the stack
push 0 push 1 push 2
Printing all elements
pall push 3 push 4 pop
Rotating the stack to the bottom
rotr pall rotl
Setting FIFO
queue push 5
Setting LIFO
stack push 5 $ Technologies 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 14.04 LTS Usage 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 2 1 0 0 3 2 1 $ Features Opcodes 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 swap Swaps the top two elements of the stack queue Sets the format of the data to a queue (FIFO) stack Sets the format of the data to a stack (LIFO) nop Doesn't do anything add Adds the top two elements of the stack sub Subtracts the top element of the stack from the second top element of the stack mul Multiplies the second top element of the stack with the top element of the stack div Divides the second top element of the stack by 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 pstr Prints the string starting at the top of the stack rotl Rotates the stack to the top rotr Rotates the stack to the bottom 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 pint pcx $ ./monty errorfile.m 1 L3: unknown instruction pcx Return value When there is no errors, monty returns 0. Otherwise, returns 1