MBSTOWCS(3) Library Functions Manual MBSTOWCS(3)

mbstowcs, mbstowcs_lconvert a character string to a wide-character string

Standard C Library (libc, -lc)

#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);

The () 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 () function uses the current locale, the () function may be passed a locale directly. See xlocale(3) for more information.

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.

The mbstowcs() function will fail if:

[]
An invalid multibyte sequence was detected.
[]
The conversion state is invalid.

mbsrtowcs(3), mbtowc(3), multibyte(3), xlocale(3)

The mbstowcs() function conforms to ISO/IEC 9899:1999 (“ISO C99”).

April 8, 2004 Mac OS X 12