root/include/linux/textsearch_fsm.h

#ifndef __LINUX_TEXTSEARCH_FSM_H
#define __LINUX_TEXTSEARCH_FSM_H

#include <linux/types.h>

enum {
        TS_FSM_SPECIFIC,        /* specific character */
        TS_FSM_WILDCARD,        /* any character */
        TS_FSM_DIGIT,           /* isdigit() */
        TS_FSM_XDIGIT,          /* isxdigit() */
        TS_FSM_PRINT,           /* isprint() */
        TS_FSM_ALPHA,           /* isalpha() */
        TS_FSM_ALNUM,           /* isalnum() */
        TS_FSM_ASCII,           /* isascii() */
        TS_FSM_CNTRL,           /* iscntrl() */
        TS_FSM_GRAPH,           /* isgraph() */
        TS_FSM_LOWER,           /* islower() */
        TS_FSM_UPPER,           /* isupper() */
        TS_FSM_PUNCT,           /* ispunct() */
        TS_FSM_SPACE,           /* isspace() */
        __TS_FSM_TYPE_MAX,
};
#define TS_FSM_TYPE_MAX (__TS_FSM_TYPE_MAX - 1)

enum {
        TS_FSM_SINGLE,          /* 1 occurrence */
        TS_FSM_PERHAPS,         /* 1 or 0 occurrence */
        TS_FSM_ANY,             /* 0..n occurrences */
        TS_FSM_MULTI,           /* 1..n occurrences */
        TS_FSM_HEAD_IGNORE,     /* 0..n ignored occurrences at head */
        __TS_FSM_RECUR_MAX,
};
#define TS_FSM_RECUR_MAX (__TS_FSM_RECUR_MAX - 1)

/**
 * struct ts_fsm_token - state machine token (state)
 * @type: type of token
 * @recur: number of recurrences
 * @value: character value for TS_FSM_SPECIFIC
 */
struct ts_fsm_token
{
        __u16           type;
        __u8            recur;
        __u8            value;
};

#endif