lex.h


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#ifndef LEX_H
#define LEX_H

#include <stddef.h>
#include <stdio.h>

enum tktype {UNDEF, ID, LIT, NUM, ANY};

struct loc
{
    const char *f;
    int line, col;
};

struct tk
{
    enum tktype type;
    struct loc loc;
    char *s;
};

struct lex
{
    struct loc loc;
    struct tk *tokens, tk;
    size_t ntok, len;
    int comment;
};

int lex(struct lex *lex, FILE *f);
int lex_eof(const struct lex *lex, const struct tk *tk);
void lex_free(struct lex *lex);

#endif