text: #ifndef _WCHAR_H
  #define _WCHAR_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include <features.h>
  
  #define __NEED_FILE
  #define __NEED_va_list
  #define __NEED_size_t
  #define __NEED_wchar_t
  #define __NEED_wint_t
  
  #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
   || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
  #define __NEED_locale_t
  #endif
  
  #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
  #define __NEED_wctype_t
  #endif
  
  #include <bits/alltypes.h>
  
  #include <bits/wchar.h>
  
  #undef NULL
  #ifdef __cplusplus
  #define NULL 0
  #else
  #define NULL ((void*)0)
  #endif
  
  #undef WEOF
  #define WEOF (-1)
  
  typedef struct
  {
  	unsigned __opaque1, __opaque2;
  } mbstate_t;
  
  wchar_t *wcscpy (wchar_t *__restrict, const wchar_t *__restrict);
  wchar_t *wcsncpy (wchar_t *__restrict, const wchar_t *__restrict, size_t);
  
  wchar_t *wcscat (wchar_t *__restrict, const wchar_t *__restrict);
  wchar_t *wcsncat (wchar_t *__restrict, const wchar_t *__restrict, size_t);
  
  int wcscmp (const wchar_t *, const wchar_t *);
  int wcsncmp (const wchar_t *, const wchar_t *, size_t);
  
  int wcscoll(const wchar_t *, const wchar_t *);
  size_t wcsxfrm (wchar_t *__restrict, const wchar_t *__restrict, size_t n);
  
  wchar_t *wcschr (const wchar_t *, wchar_t);
  wchar_t *wcsrchr (const wchar_t *, wchar_t);
  
  size_t wcscspn (const wchar_t *, const wchar_t *);
  size_t wcsspn (const wchar_t *, const wchar_t *);
  wchar_t *wcspbrk (const wchar_t *, const wchar_t *);
  
  wchar_t *wcstok (wchar_t *__restrict, const wchar_t *__restrict, wchar_t **__restrict);
  
  size_t wcslen (const wchar_t *);
  
  wchar_t *wcsstr (const wchar_t *__restrict, const wchar_t *__restrict);
  wchar_t *wcswcs (const wchar_t *, const wchar_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 *__restrict, const wchar_t *__restrict, size_t);
  wchar_t *wmemmove (wchar_t *, const wchar_t *, size_t);
  wchar_t *wmemset (wchar_t *, wchar_t, size_t);
  
  wint_t btowc (int);
  int wctob (wint_t);
  
  int mbsinit (const mbstate_t *);
  size_t mbrtowc (wchar_t *__restrict, const char *__restrict, size_t, mbstate_t *__restrict);
  size_t wcrtomb (char *__restrict, wchar_t, mbstate_t *__restrict);
  
  size_t mbrlen (const char *__restrict, size_t, mbstate_t *__restrict);
  
  size_t mbsrtowcs (wchar_t *__restrict, const char **__restrict, size_t, mbstate_t *__restrict);
  size_t wcsrtombs (char *__restrict, const wchar_t **__restrict, size_t, mbstate_t *__restrict);
  
  float wcstof (const wchar_t *__restrict, wchar_t **__restrict);
  double wcstod (const wchar_t *__restrict, wchar_t **__restrict);
  long double wcstold (const wchar_t *__restrict, wchar_t **__restrict);
  
  long wcstol (const wchar_t *__restrict, wchar_t **__restrict, int);
  unsigned long wcstoul (const wchar_t *__restrict, wchar_t **__restrict, int);
  
  long long wcstoll (const wchar_t *__restrict, wchar_t **__restrict, int);
  unsigned long long wcstoull (const wchar_t *__restrict, wchar_t **__restrict, int);
  
  
  
  int fwide (FILE *, int);
  
  
  int wprintf (const wchar_t *__restrict, ...);
  int fwprintf (FILE *__restrict, const wchar_t *__restrict, ...);
  int swprintf (wchar_t *__restrict, size_t, const wchar_t *__restrict, ...);
  
  int vwprintf (const wchar_t *__restrict, va_list);
  int vfwprintf (FILE *__restrict, const wchar_t *__restrict, va_list);
  int vswprintf (wchar_t *__restrict, size_t, const wchar_t *__restrict, va_list);
  
  int wscanf (const wchar_t *__restrict, ...);
  int fwscanf (FILE *__restrict, const wchar_t *__restrict, ...);
  int swscanf (const wchar_t *__restrict, const wchar_t *__restrict, ...);
  
  int vwscanf (const wchar_t *__restrict, va_list);
  int vfwscanf (FILE *__restrict, const wchar_t *__restrict, va_list);
  int vswscanf (const wchar_t *__restrict, const wchar_t *__restrict, va_list);
  
  wint_t fgetwc (FILE *);
  wint_t getwc (FILE *);
  wint_t getwchar (void);
  
  wint_t fputwc (wchar_t, FILE *);
  wint_t putwc (wchar_t, FILE *);
  wint_t putwchar (wchar_t);
  
  wchar_t *fgetws (wchar_t *__restrict, int, FILE *__restrict);
  int fputws (const wchar_t *__restrict, FILE *__restrict);
  
  wint_t ungetwc (wint_t, FILE *);
  
  struct tm;
  size_t wcsftime (wchar_t *__restrict, size_t, const wchar_t *__restrict, const struct tm *__restrict);
  
  #undef iswdigit
  
  #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
   || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
  FILE *open_wmemstream(wchar_t **, size_t *);
  size_t mbsnrtowcs(wchar_t *__restrict, const char **__restrict, size_t, size_t, mbstate_t *__restrict);
  size_t wcsnrtombs(char *__restrict, const wchar_t **__restrict, size_t, size_t, mbstate_t *__restrict);
  wchar_t *wcsdup(const wchar_t *);
  size_t wcsnlen (const wchar_t *, size_t);
  wchar_t *wcpcpy (wchar_t *__restrict, const wchar_t *__restrict);
  wchar_t *wcpncpy (wchar_t *__restrict, const wchar_t *__restrict, size_t);
  int wcscasecmp(const wchar_t *, const wchar_t *);
  int wcscasecmp_l(const wchar_t *, const wchar_t *, locale_t);
  int wcsncasecmp(const wchar_t *, const wchar_t *, size_t);
  int wcsncasecmp_l(const wchar_t *, const wchar_t *, size_t, locale_t);
  int wcscoll_l(const wchar_t *, const wchar_t *, locale_t);
  size_t wcsxfrm_l(wchar_t *__restrict, const wchar_t *__restrict, size_t n, locale_t);
  #endif
  
  #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
  int wcwidth (wchar_t);
  int wcswidth (const wchar_t *, size_t);
  int       iswalnum(wint_t);
  int       iswalpha(wint_t);
  int       iswblank(wint_t);
  int       iswcntrl(wint_t);
  int       iswdigit(wint_t);
  int       iswgraph(wint_t);
  int       iswlower(wint_t);
  int       iswprint(wint_t);
  int       iswpunct(wint_t);
  int       iswspace(wint_t);
  int       iswupper(wint_t);
  int       iswxdigit(wint_t);
  int       iswctype(wint_t, wctype_t);
  wint_t    towlower(wint_t);
  wint_t    towupper(wint_t);
  wctype_t  wctype(const char *);
  #undef iswdigit
  #define iswdigit(a) ((unsigned)(a)-'0' < 10)
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif
  