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#ifndef _REGEX_H
#define _REGEX_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stddef.h>
typedef ptrdiff_t regoff_t;
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;
// Flags for regcomp().
#define REG_EXTENDED 1
#define REG_ICASE 2
#define REG_NEWLINE 4
#define REG_NOSUB 8
// Flags for regexec().
#define REG_NOTBOL 1
#define REG_NOTEOL 2
// Errors for regcomp() and regexec().
#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
// Obsolete in POSIX.
#define REG_ENOSYS -1
#ifndef __MLIBC_ABI_ONLY
int regcomp(regex_t *__restrict, const char *__restrict, int);
int regexec(const regex_t *__restrict, const char *__restrict, size_t, regmatch_t *__restrict, int);
size_t regerror(int, const regex_t *__restrict, char *__restrict, size_t);
void regfree(regex_t *);
#endif /* !__MLIBC_ABI_ONLY */
#ifdef __cplusplus
}
#endif
#endif
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