#ifndef _REGEX_H
#define _REGEX_H

#ifdef __cplusplus
extern "C" {
#endif

#include <features.h>

#define __NEED_regoff_t
#define __NEED_size_t

#include <bits/alltypes.h>

typedef struct re_pattern_buffer {
  size_t re_nsub;
  void *__opaque, *__padding[4];
  size_t __nsub2;
  char __padding2;
} regex_t;

typedef struct {
  regoff_t rm_so;
  regoff_t rm_eo;
} regmatch_t;

#define REG_EXTENDED 1
#define REG_ICASE 2
#define REG_NEWLINE 4
#define REG_NOSUB 8

#define REG_NOTBOL 1
#define REG_NOTEOL 2

#define REG_OK 0
#define REG_NOMATCH 1
#define REG_BADPAT 2
#define REG_ECOLLATE 3
#define REG_ECTYPE 4
#define REG_EESCAPE 5
#define REG_ESUBREG 6
#define REG_EBRACK 7
#define REG_EPAREN 8
#define REG_EBRACE 9
#define REG_BADBR 10
#define REG_ERANGE 11
#define REG_ESPACE 12
#define REG_BADRPT 13

#define REG_ENOSYS -1

int regcomp(regex_t* __restrict, const char* __restrict, int);
int regexec(const regex_t* __restrict,
            const char* __restrict,
            size_t,
            regmatch_t* __restrict,
            int);
void regfree(regex_t*);

size_t regerror(int, const regex_t* __restrict, char* __restrict, size_t);

#ifdef __cplusplus
}
#endif

#endif