Manual Pages  — WCSTOMBS

wcstombs – convert a wide-character string to a character string

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES ERRORS SEE ALSO STANDARDS

Standard C Library (libc, -lc)

#include <stdlib.h>

size_t
wcstombs(char * restrict mbstring, const wchar_t * restrict wcstring, size_t nbytes);

The wcstombs() function converts a wide character string wcstring into a multibyte character string, mbstring, beginning in the initial conversion state. Up to nbytes bytes are stored in mbstring. Partial multibyte characters at the end of the string are not stored. The multibyte character string is null terminated if there is room.

The wcstombs() function returns the number of bytes converted (not including any terminating null), if successful, otherwise it returns (size_t )-1.

The wcstombs() function will fail if:

[EILSEQ]
	An invalid wide character was encountered.
[EINVAL]
	The conversion state is invalid.

The wcstombs() function conforms to ISO/IEC 9899:1999 ("ISO C99").