/* The header wchar.h declares input and output operations on 
 * wide streams or manipulate wide strings.
 */
#ifndef _WCHAR_
#define _WCHAR_

#include <stdio.h>  /* for FILE* */
#include <stddef.h>  /* two types defined in this header */

/* Types */
typedef struct mbstate_t mbstate_t;
typedef long int wint_t;
typedef struct wctype_t wctype_t;

/* Macros */
#ifndef NULL
#define	NULL	0
#endif

#ifndef WCHAR_MIN
#define WCHAR_MIN	0
#endif

#ifndef WCHAR_MAX
#define WCHAR_MAX	0x7fffffff
#endif

#ifndef WEOF
#define	WEOF 	((wint_t)-1)
#endif

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

int           iswalnum(wint_t);
int           iswalpha(wint_t);
int           iswcntrl(wint_t);
int           iswctype(wint_t, wctype_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);

size_t        mbrlen(const char *restrict, size_t, mbstate_t *restrict);
size_t        mbrtowc(wchar_t *restrict, const char *restrict, size_t,
                  mbstate_t *restrict);
int           mbsinit(const mbstate_t *);

size_t        mbsnrtowcs(wchar_t *restrict, const char **restrict,
                  size_t, size_t, mbstate_t *restrict);

size_t        mbsrtowcs(wchar_t *restrict, const char **restrict, size_t,
                  mbstate_t *restrict);

FILE         *open_wmemstream(wchar_t **, size_t *);

wint_t        putwc(wchar_t, FILE *);
wint_t        putwchar(wchar_t);
int           swprintf(wchar_t *restrict, size_t,
                  const wchar_t *restrict, ...);
int           swscanf(const wchar_t *restrict,
                  const wchar_t *restrict, ...);

wint_t        towlower(wint_t);
wint_t        towupper(wint_t);

wint_t        ungetwc(wint_t, FILE *);
int           vfwprintf(FILE *restrict, const wchar_t *restrict, va_list);
int           vfwscanf(FILE *restrict, const wchar_t *restrict, va_list);
int           vswprintf(wchar_t *restrict, size_t,
                  const wchar_t *restrict, va_list);
int           vswscanf(const wchar_t *restrict, const wchar_t *restrict,
                  va_list);
int           vwprintf(const wchar_t *restrict, va_list);
int           vwscanf(const wchar_t *restrict, va_list);

wchar_t      *wcpcpy(wchar_t *restrict, const wchar_t *restrict);
wchar_t      *wcpncpy(wchar_t *restrict, const wchar_t *restrict, size_t);

size_t        wcrtomb(char *restrict, wchar_t, mbstate_t *restrict);

wchar_t      *wcscat(wchar_t *restrict, const wchar_t *restrict);
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 *restrict, const wchar_t *restrict);
size_t        wcscspn(const wchar_t *, const wchar_t *);

wchar_t      *wcsdup(const wchar_t *);
size_t        wcsftime(wchar_t *restrict, size_t,
                  const wchar_t *restrict, const struct tm *restrict);
size_t        wcslen(const wchar_t *);
int           wcsncasecmp(const wchar_t *, const wchar_t *, size_t);

wchar_t      *wcsncat(wchar_t *restrict, const wchar_t *restrict, size_t);
int           wcsncmp(const wchar_t *, const wchar_t *, size_t);
wchar_t      *wcsncpy(wchar_t *restrict, const wchar_t *restrict, size_t);
size_t        wcsnlen(const wchar_t *, size_t);
size_t        wcsnrtombs(char *restrict, const wchar_t **restrict, size_t,
                  size_t, mbstate_t *restrict);
wchar_t      *wcspbrk(const wchar_t *, const wchar_t *);
wchar_t      *wcsrchr(const wchar_t *, wchar_t);
size_t        wcsrtombs(char *restrict, const wchar_t **restrict,
                  size_t, mbstate_t *restrict);
size_t        wcsspn(const wchar_t *, const wchar_t *);
wchar_t      *wcsstr(const wchar_t *restrict, const wchar_t *restrict);
double        wcstod(const wchar_t *restrict, wchar_t **restrict);
float         wcstof(const wchar_t *restrict, wchar_t **restrict);
wchar_t      *wcstok(wchar_t *restrict, const wchar_t *restrict,
                  wchar_t **restrict);
long          wcstol(const wchar_t *restrict, wchar_t **restrict, int);
long double   wcstold(const wchar_t *restrict, wchar_t **restrict);
long long     wcstoll(const wchar_t *restrict, wchar_t **restrict, int);
unsigned long wcstoul(const wchar_t *restrict, wchar_t **restrict, int);
unsigned long long
              wcstoull(const wchar_t *restrict, wchar_t **restrict, int);
int           wcswidth(const wchar_t *, size_t);
size_t        wcsxfrm(wchar_t *restrict, const wchar_t *restrict, size_t);

int           wctob(wint_t);
wctype_t      wctype(const char *);
int           wcwidth(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);
int           wprintf(const wchar_t *restrict, ...);
int           wscanf(const wchar_t *restrict, ...);

#endif