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#ifndef _REGEX_H
#define _REGEX_H
#include <sys/cdefs.h>
#include <sys/types.h>
typedef ptrdiff_t regoff_t;
typedef struct {
regoff_t rm_so;
regoff_t rm_eo;
} regmatch_t;
#define REG_EXTENDED 1
#define REG_ICASE 2
#define REG_NOSUB 4
#define REG_NEWLINE 8
#define REG_NOTBOL 1
#define REG_NOTEOL 2
#define REG_NOMATCH -1
#define RE_DUP_MAX 255
struct __regex_t;
typedef int (*matcher)(void*,const char*,int ofs,struct __regex_t *t,int plus,int eflags);
typedef struct __regex_t {
struct regex {
matcher m;
void* next;
int pieces;
int num;
struct branch *b;
} r;
int brackets,cflags;
regmatch_t *l;
} regex_t;
#define re_nsub r.pieces
int regcomp(regex_t *preg, const char *regex, int cflags) __THROW;
int regexec(const regex_t *preg, const char *string, size_t nmatch, regmatch_t pmatch[], int eflags) __THROW;
size_t regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size) __THROW;
void regfree(regex_t *preg) __THROW;
enum __regex_errors {
REG_NOERROR,
REG_BADRPT, /* Invalid use of repetition operators such as using `*' as the first character. */
REG_BADBR, /* Invalid use of back reference operator. */
REG_EBRACE, /* Un-matched brace interval operators. */
REG_EBRACK, /* Un-matched bracket list operators. */
REG_ERANGE, /* Invalid use of the range operator, eg. the ending point of the
range occurs prior to the starting point. */
REG_ECTYPE, /* Unknown character class name. */
REG_ECOLLATE, /* Invalid collating element. */
REG_EPAREN, /* Un-matched parenthesis group operators. */
REG_ESUBREG, /* Invalid back reference to a subexpression. */
REG_EEND, /* Non specific error. This is not defined by POSIX.2. */
REG_EESCAPE, /* Trailing backslash. */
REG_BADPAT, /* Invalid use of pattern operators such as group or list. */
REG_ESIZE, /* Compiled regular expression requires a pattern buffer
larger than 64Kb. This is not defined by POSIX.2. */
REG_ESPACE /* regcomp ran out of space */
};
char * re_comp(char * regex);
int re_exec(char * string);
#endif
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