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mbtowc(3c)
Standard C Library Functions mbtowc(3C)
NAME
mbtowc - convert a character to a wide-character code
SYNOPSIS
#include <stdlib.h>
int mbtowc(wchar_t *restrict pwc, const char *restrict s, size_t n);
DESCRIPTION
If s is not a null pointer, mbtowc() determines the number of the bytes
that constitute the character pointed to by s. It then determines the
wide-character code for the value of type wchar_t that corresponds to
that character. (The value of the wide-character code corresponding to
the null byte is 0.) If the character is valid and pwc is not a null
pointer, mbtowc() stores the wide-character code in the object pointed
to by pwc.
A call with s as a null pointer causes this function to return 0. The
behavior of this function is affected by the LC_CTYPE category of the
current locale. At most n bytes of the array pointed to by s will be
examined.
RETURN VALUES
If s is a null pointer, mbtowc() returns 0. If s is not a null pointer,
mbtowc() returns 0 (if s points to the null byte), the number of bytes
that constitute the converted character (if the next n or fewer bytes
form a valid character), or −1 and may set errno to indicate the error
(if they do not form a valid character).
In no case will the value returned be greater than n or the value of
the MB_CUR_MAX macro.
ERRORS
The mbtowc() function may fail if:
EILSEQ Invalid character sequence is detected.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ CSIEnabled _ Interface StabilityCommitted _ MT-LevelMT-
Safe _ StandardSee standards(7).
SEE ALSO
wctomb(3C), mblen(3C), mbstowcs(3C), setlocale(3C), wcstombs(3C),
attributes(7), standards(7)
Oracle Solaris 11.4 10 Oct 2014 mbtowc(3C)