Manpage of WCSTOMBS
WCSTOMBSSection: Linux Programmer's Manual (3)
NAMEwcstombs - convert a wide-character string to a multibyte string
#include <stdlib.h>size_t wcstombs(char *dest, const wchar_t *src, size_t n);
DESCRIPTIONIf destis not NULL, the wcstombs() function converts the wide-character string srcto a multibyte string starting at dest. At most nbytes are written to dest. The conversion starts in the initial state. The conversion can stop for three reasons:
- A wide character has been encountered that can not be represented as a multibyte sequence (according to the current locale). In this case, (size_t) -1is returned.
- 2. The length limit forces a stop. In this case, the number of bytes written to destis returned, but the shift state at this point is lost.
- The wide-character string has been completely converted, including the terminating null wide character (Laq\0aq). In this case, the conversion ends in the initial state. The number of bytes written to dest, excluding the terminating null byte (aq\0aq), is returned.
The programmer must ensure that there is room for at least nbytes at dest.
If destis NULL, nis ignored, and the conversion proceeds as above, except that the converted bytes are not written out to memory, and no length limit exists.
RETURN VALUEThe wcstombs() function returns the number of bytes that make up the converted part of a multibyte sequence, not including the terminating null byte. If a wide character was encountered which could not be converted, (size_t) -1is returned.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, C99.
NOTESThe behavior of wcstombs() depends on the LC_CTYPEcategory of the current locale.
The function wcsrtombs(3) provides a better interface to the same functionality.
SEE ALSOmblen(3), mbstowcs(3), mbtowc(3), wcsrtombs(3) wctomb(3)
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