#ifndef PROGRAM_H

#define PROGRAM_H

#include "hash.h"

#include <limits.h>

#include <stdbool.h>

#include <stddef.h>

struct program {

const char *text;

};

struct text_pos {

};

struct text_span {

struct text_pos start;

struct text_pos end;

};

#define TEXT_POS_INVALID_COL (SIZE_MAX)

#define TEXT_POS_INVALID_LINE (SIZE_MAX)

#define MK_INVALID_TEXT_POS(idx) \

(struct text_pos) { idx, TEXT_POS_INVALID_LINE, TEXT_POS_INVALID_COL }

#define MK_INVALID_TEXT_SPAN(start, end) \

(struct text_span) { MK_INVALID_TEXT_POS(start), MK_INVALID_TEXT_POS(end) }

bool text_span_eq(const void *l, const void *r);

bool text_pos_eq(const void *l, const void *r);

void hash_text_pos(struct hasher *hasher, const void *value);

void hash_text_span(struct hasher *hasher, const void *value);

size_t text_pos_len(struct text_pos start, struct text_pos end);

size_t text_span_len(const struct text_span *span);

void next_col(struct text_pos *pos);

void next_line(struct text_pos *pos);