The following data structures are used in this project:

/**

• struct stack_s - doubly linked list representation of a stack (or queue)
• @n: integer
• @prev: points to the previous element of the stack (or queue)
• @next: points to the next element of the stack (or queue)
• Description: doubly linked list node structure
• for stack, queues, LIFO, FIFO */ typedef struct stack_s { int n; struct stack_s *prev; struct stack_s *next; } stack_t;

/**

• struct instruction_s - opcode and its function
• @opcode: the opcode
• @f: function to handle the opcode
• Description: opcode and its function
• for stack, queues, LIFO, FIFO */ typedef struct instruction_s { char *opcode; void (*f)(stack_t **stack, unsigned int line_number); } instruction_t;

The 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:

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:

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