/*
* Copyright (C) 2023 Johnny Richard
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LEXER_H
#define LEXER_H

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

typedef enum {
    TOKEN_NAME,
    TOKEN_OPAREN,
    TOKEN_CPAREN,
    TOKEN_COLON,
    TOKEN_SEMICOLON,
    TOKEN_OCURLY,
    TOKEN_CCURLY,
    TOKEN_NUMBER,
    TOKEN_EOF
} token_kind_t;

typedef struct token_t {
  token_kind_t  kind;
  char         *value;
  uint32_t      row;
  uint32_t      col;
} token_t;


typedef struct lexer_t {
  char     *filepath;
  char     *src;
  size_t    srclen;
  uint32_t  cur;
  uint32_t  row;
  uint32_t  bol;
} lexer_t;

void lexer_init(lexer_t *lexer, char *filepath);

void lexer_next_token(lexer_t *lexer, token_t *token);

void lexer_load_file_contents(lexer_t *lexer);

char lexer_current_char(lexer_t *lexer);

bool lexer_is_eof(lexer_t *lexer);

bool lexer_is_not_eof(lexer_t *lexer);

void lexer_drop_char(lexer_t *lexer);

char * token_kind_to_str(token_kind_t kind);

#endif /* LEXER_H */