WCSTOMBS(3)

NAME
2.46 `wcstombs'--minimal wide char string to multibyte string converter

SYNOPSIS
     #include <stdlib.h>
     size_t wcstombs(char *S, const wchar_t *PWC, size_t N);

DESCRIPTION
When _MB_CAPABLE is not defined, this is a minimal ANSI-conforming implementation of `wcstombs'. In this case, all wide-characters are expected to represent single bytes and so are converted simply by casting to char.
   When _MB_CAPABLE is defined, this routine calls `_wcstombs_r' to perform the conversion, passing a state variable to allow state dependent decoding. The result is based on the locale setting which may be restricted to a defined set of locales.

RETURNS
This implementation of `wcstombs' returns `0' if S is `NULL' or is the empty string; it returns `-1' if _MB_CAPABLE and one of the wide-char characters does not represent a valid multi-byte character; otherwise it returns the minimum of: `n' or the number of bytes that are transferred to `s', not including the nul terminator.
   If the return value is -1, the state of the `pwc' string is indeterminate. If the input has a length of 0, the output string will be modified to contain a wchar_t nul terminator if `n' > 0.

PORTABILITY
`wcstombs' is required in the ANSI C standard. However, the precise effects vary with the locale.
   `wcstombs' requires no supporting OS subroutines.

SEE ALSO
wcstombs is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.