label.h

/*
 *  label.h
 *  Copyright (C) 2015 Samuel Dominguez Lorenzo
 */
#ifndef LABEL_H
#define LABEL_H

#include <string.h>
#include <stdio.h>

/* this max value was taken from the C standard, interesting fact, or not? */
#define LABEL_MAX_LENGTH	63
/* a rough estimate, if you ever run out of labels just modify this and
 * recompile */
#define LABEL_MAX_NUMBER	3000

struct label {
	char name[LABEL_MAX_LENGTH];
	int ram_address;
};

struct label label_table[LABEL_MAX_NUMBER];
int label_count;

struct label undefined_symbols[LABEL_MAX_NUMBER];
int undefined_symbols_count;

void init_label_table();
void add_label(char *s, int ram_address);

void init_undefined_table();
void add_undefined(char *s, int ram_address);
int check_undefined_at_address(int address, struct label *undefined);
int is_redefine(char *s);

#endif /* LABEL_H */