svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
mbrtowc(3)
MBRTOWC(3) Linux Programmer's Manual MBRTOWC(3)
NAME
mbrtowc - convert a multibyte sequence to a wide character
SYNOPSIS
#include <wchar.h>
size_t mbrtowc(wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
DESCRIPTION
The main case for this function is when s is not NULL and pwc is not
NULL. In this case, the mbrtowc() function inspects at most n bytes of
the multibyte string starting at s, extracts the next complete multi‐
byte character, converts it to a wide character and stores it at *pwc.
It updates the shift state *ps. If the converted wide character is not
L'\0' (the null wide character), it returns the number of bytes that
were consumed from s. If the converted wide character is L'\0', it re‐
sets 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, mbrtowc() returns (size_t) -2. This can happen even if n >=
MB_CUR_MAX, if the multibyte string contains redundant shift sequences.
If the multibyte string starting at s contains an invalid multibyte se‐
quence before the next complete character, mbrtowc() returns
(size_t) -1 and sets errno to EILSEQ. In this case, the effects on *ps
are undefined.
A different case is when s is not NULL but pwc is NULL. In this case,
the mbrtowc() function behaves as above, except that it does not store
the converted wide character in memory.
A third case is when s is NULL. In this case, pwc and n are ignored.
If the conversion state represented by *ps denotes an incomplete multi‐
byte character conversion, the mbrtowc() function returns (size_t) -1,
sets errno to EILSEQ, and leaves *ps in an undefined state. Otherwise,
the mbrtowc() function puts *ps in the initial state and returns 0.
In all of the above cases, if ps is NULL, a static anonymous state
known only to the mbrtowc() function is used instead. Otherwise, *ps
must be a valid mbstate_t object. An mbstate_t object a can be ini‐
tialized to the initial state by zeroing it, for example using
memset(&a, 0, sizeof(a));
RETURN VALUE
The mbrtowc() function returns the number of bytes parsed from the
multibyte sequence starting at s, if a non-L'\0' wide character was
recognized. It returns 0, if a L'\0' wide character was recognized.
It returns (size_t) -1 and sets errno to EILSEQ, if an invalid multi‐
byte sequence was encountered. It returns (size_t) -2 if it couldn't
parse a complete multibyte character, meaning that n should be in‐
creased.
ATTRIBUTES
For an explanation of the terms used in this section, see attrib‐
utes(7). allbox; lb lb lb l l l. Interface Attribute Value T{ mbr‐
towc() T} Thread safety MT-Unsafe race:mbrtowc/!ps
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99.
NOTES
The behavior of mbrtowc() depends on the LC_CTYPE category of the cur‐
rent locale.
SEE ALSO
mbsinit(3), mbsrtowcs(3)
COLOPHON
This page is part of release 5.02 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2019-03-06 MBRTOWC(3)