NAME
mbrlen - determine number of bytes in next multibyte character SYNOPSIS
#include
sizet mbrlen(const char *s, sizet n, mbstatet *ps); DESCRIPTION The mbrlen() function inspects at most n bytes of the multibyte string starting at s and extracts the next complete multibyte character. It updates the shift state *ps. If the multibyte character is not the null wide character, it returns the number of bytes that were consumed from s. If the multibyte character is the null wide character, it resets the shift state *ps to the initial state and returns 0. If the n bytes starting at s do not contain a complete multibyte char‐ acter, mbrlen() returns (sizet) -2. This can happen even if n >= MBCURMAX, if the multibyte string contains redundant shift sequences. If the multibyte string starting at s contains an invalid multibyte sequence before the next complete character, mbrlen() returns
(sizet) -1 and sets errno to EILSEQ. In this case, the effects on *ps are undefined. If ps is a NULL pointer, a static anonymous state known only to the mbrlen() function is used instead. RETURN VALUE The mbrlen() function returns the number of bytes parsed from the
multibyte sequence starting at s, if a non-null wide character was rec‐ ognized. It returns 0, if a null wide character was recognized. It
returns (sizet) -1 and sets errno to EILSEQ, if an invalid multibyte
sequence was encountered. It returns (sizet) -2 if it couldn't parse a complete multibyte character, meaning that n should be increased. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌──────────┬───────────────┬───────────────────────────┐ │Interface │ Attribute │ Value │ ├──────────┼───────────────┼───────────────────────────┤
│mbrlen() │ Thread safety │ MT-Unsafe race:mbrlen/!ps │ └──────────┴───────────────┴───────────────────────────┘ CONFORMING TO C99. NOTES The behavior of mbrlen() depends on the LCCTYPE category of the cur‐ rent locale. SEE ALSO mbrtowc(3) COLOPHON
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GNU 2013-06-21 MBRLEN(3)