WCTOMBSection: Linux Programmer's Manual (3)
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NAMEwctomb - convert a wide character to a multibyte sequence
#include <stdlib.h> int wctomb(char *s, wchar_t wc);
DESCRIPTIONIf s is not NULL, the wctomb() function converts the wide character wc to its multibyte representation and stores it at the beginning of the character array pointed to by s. It updates the shift state, which is stored in a static anonymous variable only known to the wctomb function, and returns the length of said multibyte representation, that is, the number of bytes written at s.
The programmer must ensure that there is room for at least MB_CUR_MAX bytes at s.
If s is NULL, the wctomb() function resets the shift state, only known to this function, to the initial state, and returns non-zero if the encoding has nontrivial shift state, or zero if the encoding is stateless.
RETURN VALUEIf s is not NULL, the wctomb() function returns the number of bytes that have been written to the byte array at s. If wc can not be represented as a multibyte sequence (according to the current locale), -1 is returned.
NOTESThe behavior of wctomb() depends on the LC_CTYPE category of the current locale.
This function is not multithread safe. The function wcrtomb(3) provides a better interface to the same functionality.
SEE ALSOMB_CUR_MAX(3), wcrtomb(3), wcstombs(3)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.