#pragma once

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

#include "globals.h"

#define LEX_BUF_SIZE 4096

typedef struct Lexer {
    uint32_t linepos;
    uint32_t lineno;

    FILE *source;

    int flag_EOF;

    char *buffer;
    char *curr;

    size_t bytes_in_buffer;
} Lexer;

Lexer *new_lexer();

void lexer_set_source(Lexer *lexer, FILE *source);

void lexer_fill_buffer(Lexer *lexer);

void lexer_consume(Lexer *lexer);

char lexer_curr(Lexer *lexer);

char lexer_peek(Lexer *lexer);

Token lexer_next_token(Lexer *lexer);

void free_lexer(Lexer *lexer);