mbtowc(3int)mbtowc(3int)Namembtowc - converts a single multibyte character into a character of type
wchar_t
Syntax
#include <stdlib.h>
int mbtowc (pwc, s, n)
wchar_t *pwc;
const char *s;
size_t n;
Arguments
pwc The pwc argument is a pointer to the resulting object of type
wchar_t.
s The s argument is a pointer to a multibyte character.
n The n argument is the maximum number of bytes of object s that
are examined.
Description
If s is not a null pointer, the function determines the number of bytes
that comprise the multibyte character pointed to by s. It then deter‐
mines the character code for the value (of type wchar_t) that corre‐
sponds to that multibyte character (the value of the code corresponding
to the null character is zero). If the multibyte character is valid and
pwc is not a null pointer, the function stores the code in the object
pointed to by pwc. At most n bytes of the array pointed to by s are
examined. This function is affected by the LC_CTYPE category of the
current locale.
Return Values
If s is a null pointer, the function returns a zero value. If s is not
a null pointer, the function returns:
· 0, if s points to the null character
· The number of bytes that comprise the converted multibyte charac‐
ter, if the next n or fewer bytes form a valid multibyte charac‐
ter
· - -1, if the next n or fewer bytes do not form a valid multibyte
character
In no case is the value returned greater than n or the value of the
MB_CUR_MAX macro.
See Alsomblen(3int), mbstowcs(3int), setlocale(3int), wctomb(3int),
wcstombs(3int)mbtowc(3int)
