MB_LEN_MAX(3) Linux Programmer's Manual MB_LEN_MAX(3)NAME
MB_LEN_MAX - maximum multibyte length of a character across all locales
SYNOPSIS
#include <limits.h>
DESCRIPTION
The MB_LEN_MAX macro is the upper bound for the number of bytes needed to represent a single wide character, across all locales.
RETURN VALUE
A constant integer >= 1.
CONFORMING TO
ANSI C, POSIX.1
NOTES
The entities MB_LEN_MAX and sizeof(wchar_t) are totally unrelated. In the GNU libc, MB_LEN_MAX is typically 6 while sizeof(wchar_t) is 4.
SEE ALSO MB_CUR_MAX(3)Linux 1999-07-04 MB_LEN_MAX(3)
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WCTOMB(3) BSD Library Functions Manual WCTOMB(3)NAME
wctomb -- convert a wide-character code to a character
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
int
wctomb(char *mbchar, wchar_t wchar);
DESCRIPTION
The wctomb() function converts a wide character wchar into a multibyte character and stores the result in mbchar. The object pointed to by
mbchar must be large enough to accommodate the multibyte character, which may be up to MB_LEN_MAX bytes.
A call with a null mbchar pointer returns nonzero if the current locale requires shift states, zero otherwise; if shift states are required,
the shift state is reset to the initial state.
RETURN VALUES
If mbchar is NULL, the wctomb() function returns nonzero if shift states are supported, zero otherwise. If mbchar is valid, wctomb() returns
the number of bytes processed in mbchar, or -1 if no multibyte character could be recognized or converted. In this case, wctomb()'s internal
conversion state is undefined.
ERRORS
The wctomb() function will fail if:
[EILSEQ] An invalid multibyte sequence was detected.
[EINVAL] The internal conversion state is invalid.
SEE ALSO mbtowc(3), wcrtomb(3), wcstombs(3), wctob(3)STANDARDS
The wctomb() function conforms to ISO/IEC 9899:1999 (``ISO C99'').
BSD April 8, 2004 BSD