#ifndef _WCHAR_H
#define _WCHAR_H

#include <stddef.h>
#include <stdarg.h>
#include <stdio.h>

#if defined(__WINT_TYPE__)
typedef __WINT_TYPE__ wint_t;
#else
typedef unsigned int wint_t;
#endif
typedef int (*wctype_t)(wint_t) __attribute__((__const__));

#ifndef WCHAR_MIN
#define WCHAR_MIN (-2147483647 - 1)
#define WCHAR_MAX (2147483647)
#endif
#ifndef WEOF
#define WEOF 0xffffffffu
#endif

typedef struct {
  int count;
  wchar_t sofar;
} mbstate_t;

wint_t btowc(int);
wint_t fgetwc(FILE *);
wchar_t* fgetws(wchar_t *, int, FILE *);
wint_t fputwc(wchar_t, FILE *);
int fputws(const wchar_t *, FILE *);
int fwide(FILE *, int);
int fwprintf(FILE *, const wchar_t *, ...);
int fwscanf(FILE *, const wchar_t *, ...);
wint_t getwc(FILE *);
wint_t getwchar(void);

size_t mbrlen(const char *, size_t, mbstate_t *);
size_t mbrtowc(wchar_t *, const char *, size_t, mbstate_t *);
int mbsinit(const mbstate_t *);
size_t mbsrtowcs(wchar_t *, const char **, size_t, mbstate_t *);
wint_t putwc(wchar_t, FILE *);
wint_t putwchar(wchar_t);
int swprintf(wchar_t *, size_t, const wchar_t *, ...);
int swscanf(const wchar_t *, const wchar_t *, ...);

wint_t ungetwc(wint_t, FILE *);
int vfwprintf(FILE *, const wchar_t *, va_list);
int vfwscanf(FILE *, const wchar_t *, va_list);
int vwprintf(const wchar_t *, va_list);
int vswprintf(wchar_t *, size_t, const wchar_t *, va_list);
int vswscanf(const wchar_t *, const wchar_t *, va_list);
int vwscanf(const wchar_t *, va_list);
size_t wcrtomb(char *, wchar_t, mbstate_t *);
wchar_t *wcscat(wchar_t *, const wchar_t *);
wchar_t *wcschr(const wchar_t *, wchar_t);
int wcscmp(const wchar_t *, const wchar_t *);
int wcscoll(const wchar_t *, const wchar_t *);
wchar_t* wcscpy(wchar_t *, const wchar_t *);
size_t wcscspn(const wchar_t *, const wchar_t *);
size_t wcslen(const wchar_t *);
wchar_t *wcsncat(wchar_t *, const wchar_t *, size_t);
int wcsncmp(const wchar_t *, const wchar_t *, size_t);
wchar_t *wcsncpy(wchar_t *, const wchar_t *, size_t);
wchar_t *wcspbrk(const wchar_t *, const wchar_t *);
wchar_t *wcsrchr(const wchar_t *, wchar_t);
size_t wcsrtombs(char *, const wchar_t **, size_t, mbstate_t *);
size_t wcsspn(const wchar_t *, const wchar_t *);
wchar_t *wcsstr(const wchar_t *, const wchar_t *);
double wcstod(const wchar_t *, wchar_t **);
float wcstof(const wchar_t *, wchar_t **);
wchar_t *wcstok(wchar_t *, const wchar_t *, wchar_t **);
long wcstol(const wchar_t *, wchar_t **, int);
long double wcstold(const wchar_t *, wchar_t **);
long long wcstoll(const wchar_t *, wchar_t **, int);
unsigned long wcstoul(const wchar_t *, wchar_t **, int);
unsigned long long wcstoull(const wchar_t *, wchar_t **, int);

size_t wcsxfrm(wchar_t *, const wchar_t *, size_t);
int wctob(wint_t);

wchar_t *wmemchr(const wchar_t *, wchar_t, size_t);
int wmemcmp(const wchar_t *, const wchar_t *, size_t);
wchar_t *wmemcpy(wchar_t *, const wchar_t *, size_t);
wchar_t *wmemmove(wchar_t *, const wchar_t *, size_t);
wchar_t *wmemset(wchar_t *, wchar_t, size_t);
int wprintf(const wchar_t *, ...);
int wscanf(const wchar_t *, ...);

#ifdef _XOPEN_SOURCE
int wcwidth(wchar_t c);
#endif

#endif