MB_LEN_MAX - maximum multibyte length of a character across all locales
Standard C library (
libc)
#include <limits.h>
The
MB_LEN_MAX macro is the maximum number of bytes needed to represent a
single wide character, in any of the supported locales.
A constant integer greater than zero.
POSIX.1-2001, POSIX.1-2008, C99.
The entities
MB_LEN_MAX and
sizeof(wchar_t) are totally unrelated.
In glibc,
MB_LEN_MAX is typically 16 (6 in glibc versions earlier than
2.2), while
sizeof(wchar_t) is 4.
MB_CUR_MAX(3)