wcstombs(3C) Standard C Library Functions wcstombs(3C)
wcstombs - convert a wide-character string to a character string
#include <stdlib.h>
size_t wcstombs(char *s, const wchar_t *pwcs, size_t n);
The wcstombs() function converts the sequence of wide-character codes
from the array pointed to by pwcs into a sequence of characters and
stores these characters into the array pointed to by s, stopping if a
character would exceed the limit of n total bytes or if a null byte is
stored. Each wide-character code is converted as if by a call to
wctomb(3C).
The behavior of this function is affected by the LC_CTYPE category of
the current locale.
No more than n bytes will be modified in the array pointed to by s. If
copying takes place between objects that overlap, the behavior is unde‐
fined. If s is a null pointer, wcstombs() returns the length required
to convert the entire array regardless of the value of n, but no values
are stored.
If a wide-character code is encountered that does not correspond to a
valid character (of one or more bytes each), wcstombs() returns
(size_t)-1. Otherwise, wcstombs() returns the number of bytes stored
in the character array, not including any terminating null byte. The
array will not be null-terminated if the value returned is n.
The wcstombs() function may fail if:
EILSEQ
A wide-character code does not correspond to a valid character.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|MT-Level |MT-Safe |
|CSI |Enabled |
+-----------------------------+-----------------------------+
mblen(3C), mbstowcs(3C), mbtowc(3C), setlocale(3C), wctomb(3C),
attributes(5)
SunOS 5.9 20 Dec 1996 wcstombs(3C)