#ifndef APLWC_INTERNAL_H
#define APLWC_INTERNAL_H

#include <aplwc.h>
#include <aplwc_macros.h>

#define RETURN_ERROR(aplwcp, rc, msg) do{ \
	return ((aplwc)->last_error = (rc)); \
	}while(0)

#include <assert.h>
#include <stdalign.h>
#include <stdbool.h>
#include <string.h>

struct memory {
	uint8_t *data;
	size_t size;
	size_t offset;
};

struct aplwc {
	enum aplwc_rc last_error;
	struct memory memory;
};

struct aplwc_line {
	struct aplwc *aplwc;
	struct string *text;
	struct token_list *tokens;
};

struct string {
	size_t bytes;
	size_t chars;
	uint8_t utf8[1];
};

enum token_tag {
	TOKEN_TAG_IDENTIFIER,
	TOKEN_TAG_NEWLINE
};

struct token {
	enum token_tag tag;
};

struct token_list {
	size_t length;
	struct token tokens[1];
};

/* eval.c */
void eval_line(struct aplwc_line *);

/* memory.c */
struct memory memory_init(uint8_t *, size_t);
struct aplwc *memory_alloc_aplwc(struct memory *);
struct aplwc_line *memory_alloc_aplwc_line(struct memory *);
struct string *memory_alloc_string(struct memory *, size_t);
struct token_list *memory_alloc_token_list(struct memory *, size_t);
void memory_free_aplwc(struct memory *, struct aplwc *);
void memory_free_aplwc_line(struct memory *, struct aplwc_line *);
void memory_free_string(struct memory *, struct string *);
void memory_free_token_list(struct memory *, struct token_list *);

/* string.c */
struct string *chars_to_string(struct aplwc *, const char *);
uint32_t string_char(struct string *, size_t);
size_t char_length(struct string *, size_t);

/* syntax.c */
struct token_list *scan_line(struct aplwc *, struct string *);

#endif /* APLWC_INTERNAL_H */