wcsrtombs
, wcsnrtombs
—convert a wide-character string to a character string#include <wchar.h> size_t wcsrtombs(char *dst, const wchar_t **src, size_t len, mbstate_t *ps); #include <wchar.h> size_t _wcsrtombs_r(struct _reent *ptr, char *dst, const wchar_t **src, size_t len, mbstate_t *ps); #include <wchar.h> size_t wcsnrtombs(char *dst, const wchar_t **src, size_t nwc, size_t len, mbstate_t *ps); #include <wchar.h> size_t _wcsnrtombs_r(struct _reent *ptr, char *dst, const wchar_t **src, size_t nwc, size_t len, mbstate_t *ps);
Description
The wcsrtombs
function converts a string of wide characters indirectly
pointed to by src to a corresponding multibyte character string stored in
the array pointed to by dst>. No more than len bytes are written to
dst>.
If dst> is NULL, no characters are stored.
If dst> is not NULL, the pointer pointed to by src is updated to point to the character after the one that conversion stopped at. If conversion stops because a null character is encountered, *src is set to NULL.
The mbstate_t argument, ps, is used to keep track of the shift state. If
it is NULL, wcsrtombs
uses an internal, static mbstate_t object, which
is initialized to the initial conversion state at program startup.
The wcsnrtombs
function behaves identically to wcsrtombs
, except that
conversion stops after reading at most nwc characters from the buffer
pointed to by src.
Returns
The wcsrtombs
and wcsnrtombs
functions return the number of bytes
stored in the array pointed to by dst (not including any terminating
null), if successful, otherwise it returns (size_t)-1.
Portability
wcsrtombs
is defined by C99 standard.
wcsnrtombs
is defined by the POSIX.1-2008 standard.