struct FilterRules;

struct FFilter;

typedef void (*Fcallback)(struct FilterRules *fr, const struct FFilter *ff,

        char *obuf, int *olen, const char *ibuf, int pos);

/* TRUE if match */

typedef int (*Ffunction)(struct FFilter *ff, unsigned char c);

typedef void (*Freset)(struct FFilter *ff);

struct FFilter {

    /* Static */

    Ffunction function;

    Freset reset;

    Fcallback callback;

    int matched;

};

struct FilterRules {

    int nfilters;

    struct FFilter **filters;

    unsigned char *fbuffer;

    int fbuffer_len;

    int fbuffer_allocated;

};

void add_ffilter(struct FilterRules *fr, struct FFilter *ff);

struct FilterRules * new_filter_rules();

void filter_stream(struct FilterRules *fr, char *obuf, int *olen, const char *buffer, int len);

void filter_flush(struct FilterRules *fr, char *obuf, int *olen);

/* filter_string.c */

struct FFilter *new_fstring(char *p);

struct FFilter *new_fstring_len(char *p, int len);

/* filter_telnet.c */

struct FFilter *new_ftelnet();

/* filter_tildes.c */

struct FFilter *new_ftildes();