mbstowcs(3int)mbstowcs(3int)Namembstowcs - converts a sequence of multibyte characters into a sequence
of characters of type wchar_t.
size_t mbstowcs (pwcs, s, n)
const char *s;
pwcs The pwcs argument is a pointer to the resulting wide character
s The s argument is a pointer to the multibyte character
n The n argument is the maximum number of resulting wide charac‐
ters stored in pwcs.
The function converts a sequence of multibyte characters from the array
pointed to by s into a sequence of characters of type wchar_t, and
stores not more than n characters into the array pointed to by pwcs. No
multibyte characters that follow a null character (which is converted
into a code with value zero) are examined or converted. No more than n
elements are modified in the array pointed to by pwcs. This function
is affected by the LC_CTYPE category of the current locale.
If an invalid multibyte character is encountered, the function returns
(size_t) -1. Otherwise, the function returns the number of array ele‐
ments modified, not including a terminating null character, if any. The
array will not be null-terminated if the value returned is n.
See Alsomblen(3int), mbtowc(3int), setlocale(3int), wctomb(3int),