NAME
wctomb - convert a wide character to a multibyte sequence SYNOPSIS
#include
int wctomb(char *s, wchart wc); DESCRIPTION If 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 known only to the wctomb() func‐ tion, 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 MBCURMAX bytes at s. If s is NULL, the wctomb() function resets the shift state, known only to this function, to the initial state, and returns nonzero if the encoding has nontrivial shift state, or zero if the encoding is state‐ less. RETURN VALUE If 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 repre‐ sented as a multibyte sequence (according to the current locale), -1 is returned. If s is NULL, the wctomb() function returns nonzero if the encoding has nontrivial shift state, or zero if the encoding is stateless. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌──────────┬───────────────┬────────────────┐ │Interface │ Attribute │ Value │ ├──────────┼───────────────┼────────────────┤
│wctomb() │ Thread safety │ MT-Unsafe race │ └──────────┴───────────────┴────────────────┘ CONFORMING TO C99. NOTES The behavior of wctomb() depends on the LCCTYPE category of the cur‐ rent locale. This function is not multithread safe. The function wcrtomb(3) pro‐ vides a better interface to the same functionality. SEE ALSO MBCURMAX(3), wcrtomb(3), wcstombs(3) COLOPHON
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GNU 1999-07-25 WCTOMB(3)