Manpage of WCSRTOMBS
WCSRTOMBSSection: Linux Programmer's Manual (3)
NAMEwcsrtombs - convert a wide-character string to a multibyte string
#include <wchar.h>size_t wcsrtombs(char *dest, const wchar_t **src, size_t len, mbstate_t *ps);
DESCRIPTIONIf destis not NULL, the wcsrtombs() function converts the wide-character string *srcto a multibyte string starting at dest. At most lenbytes are written to dest. The shift state *psis updated. The conversion is effectively performed by repeatedly calling wcrtomb(dest, *src, ps), as long as this call succeeds, and then incrementing destby the number of bytes written and *srcby one. 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, *srcis left pointing to the invalid wide character, (size_t) -1is returned, and errnois set to EILSEQ.
- The length limit forces a stop. In this case, *srcis left pointing to the wide character to be converted, and the number of bytes written to destis returned.
- The wide-character string has been completely converted, including the terminating null wide character (Laq\0aq), which has the side effect of bringing back *psto the initial state. In this case, *srcis set to NULL, and the number of bytes written to dest, excluding the terminating null byte (aq\0aq), is returned.
If destis NULL, lenis ignored, and the conversion proceeds as above, except that the converted bytes are not written out to memory, and that no length limit exists.
In both of the above cases, if psis NULL, a static anonymous state known only to the wcsrtombs() function is used instead.
RETURN VALUEThe wcsrtombs() function returns the number of bytes that make up the converted part of multibyte sequence, not including the terminating null byte. If a wide character was encountered which could not be converted, (size_t) -1is returned, and errnoset to EILSEQ.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|wcsrtombs()||Thread safety||MT-Unsafe race:wcsrtombs/!ps|
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, C99.
NOTESThe behavior of wcsrtombs() depends on the LC_CTYPEcategory of the current locale.
SEE ALSOiconv(3), mbsinit(3), wcrtomb(3), wcsnrtombs(3), wcstombs(3)
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