#ifndef LEXER_H
#define LEXER_H
#include "string_view.h"


typedef enum token_kind {
    TOKEN_KW_PUSH,
    TOKEN_KW_DUP,
    TOKEN_KW_COPY,
    TOKEN_KW_SWAP,
    TOKEN_KW_DROP,
    TOKEN_KW_SLIDE,
    TOKEN_KW_ADD,
    TOKEN_KW_SUB,
    TOKEN_KW_MUL,
    TOKEN_KW_DIV,
    TOKEN_KW_MOD,
    TOKEN_KW_STORE,
    TOKEN_KW_LOAD,
    TOKEN_KW_CALL,
    TOKEN_KW_RET,
    TOKEN_KW_JMP,
    TOKEN_KW_JMPZ,
    TOKEN_KW_JMPN,
    TOKEN_KW_PRINTI,
    TOKEN_KW_PRINTC,
    TOKEN_KW_READI,
    TOKEN_KW_READC,
    TOKEN_KW_END,
    TOKEN_EOS,
    TOKEN_NUMBER,
    TOKEN_IDENT,
    TOKEN_COLON,
    TOKEN_UNKOWN,
    TOKEN_EOF
} token_kind_t;

typedef struct lex_loc {
    size_t offset;
    size_t lineoffset;
    size_t lineno;
} lex_loc_t;

typedef struct token {
    token_kind_t kind;
    string_view_t value;
    lex_loc_t loc;
} token_t;

typedef struct lexer {
    char *file_name;
    string_view_t source;
    lex_loc_t loc;
} lexer_t;

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

bool
lexer_is_eof(lexer_t *lexer);

char
lexer_current_char(lexer_t *lexer);

char
lexer_next_char(lexer_t *lexer);

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

char *
token_to_cstr(token_kind_t kind);

#endif /* LEXER_H */