mbstowcs3
Convert a character string to a wide-character string
Usage
#include <stdlib.h>
size_t
mbstowcs(wchar_t *restrict pwcs, const char *restrict s, size_t n);
#include <stdlib.h>
#include <xlocale.h>
size_t
mbstowcs_l(wchar_t *restrict pwcs, const char *restrict s, size_t n, locale_t loc);
Library
Standard C Library (libc, -lc)
Overview
The mbstowcs() function converts a multibyte character string s, beginning in the initial conversion state, into a wide character string pwcs. No more than n wide characters are stored. A terminating null wide character is appended, if there is room.
Although the mbstowcs() function uses the current locale, the mbstowcs_l() function may be passed a locale directly. See xlocale(3) for more information.
Return values
The mbstowcs() function returns the number of wide characters converted, not counting any terminating null wide character, or -1 if an invalid multibyte character was encountered.
Errors
The mbstowcs() function will fail if:
- [EILSEQ]
-
An invalid multibyte sequence was detected.
- [EINVAL]
-
The conversion state is invalid.
Releases
135 releases since Mac OS X 10.4; the text changed 2 times.