pSOSystem System Calls - Read

mblen pREPC+ System Calls
mblen Determines the number of bytes in a multibyte character.
#include
int mblen (
const char *s, /* character */
size_t n /* size of character */
)
Description
Arguments
Return Value
Error Codes
If s is not a null pointer, the mblen() function determines the number of bytes
contained in the multibyte character pointed to by s. Except that the shift state of
the mbtowc() function is not affected, it is equivalent to:
mbtowc((wchar_t *)0, s, n);
s Points to the character to be examined.
n Specifies the size of s.
If s is a null pointer, this function returns a nonzero or zero value, if multibyte
character encodings, respectively, do or do not have state-dependent encodings. If s
is not a null pointer, this function either returns 0 (if s points to the null character),
or returns the number of bytes that are contained in the multibyte character (if the
next n or fewer bytes form a valid multibyte character), or returns -1 (if they do not
form a valid multibyte character).
None.
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