wcrtomb()

Convert a wide-character code to a character

Synopsis:

#include <wchar.h>

size_t wcrtomb( char * s,
                wchar_t wc,
                mbstate_t * ps);

Arguments:

s: NULL, or a pointer to a location where the function can store the multibyte character.
wc: The wide character that you want to convert.
ps: An internal pointer that lets wcrtomb() be a restartable version of wctomb(); if ps is NULL, wcrtomb() uses its own internal variable.
You can call mbsinit() to determine the status of this variable.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

If s isn't NULL, the wcrtomb() function converts the wide character wc into a multibyte character. The multibyte character is stored in the location referenced by s, to a maximum of MB_CUR_MAX bytes.

If s is NULL, the function call is equivalent to

wcrtomb(buf, L'\0', ps)

where buf is an internal buffer. The mbstate_t object referenced by ps is then reset to its initial conversion state.

This function is affected by LC_CTYPE.

Returns:

The number of bytes stored, or (size_t)-1 if the variable wc is an invalid wide-character code.

Errors:

EILSEQ: Invalid wide-character code.
EINVAL: The variable ps points to an invalid conversion state.

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	Yes
Thread	Read the Caveats

Caveats:

This function is safe to call in a multithreaded program if the ps argument isn't NULL.