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utf8towc()

Convert a UTF-8 character to a wide-character code

Synopsis:

int utf8towc( wchar_t *pwc,
              const char *s,
              size_t n );

Arguments:

pwc

A pointer to a location where utf8towc() stores the wide-character representation of s.

s

A pointer to a UTF-8 character.

n

The maximum number of bytes to convert.

Library:

ph

Description:

The utf8towc() function converts a single UTF-8 character pointed to by s into a wide-character code pointed to by pwc, to a maximum of n bytes.

This function is similar to mbtowc(), except:

• utf8towc() isn't affected by the current locale.
• Neither pwc nor s is allowed to be NULL.
• You can pass 0 for n if you know that s points to a null-terminated string (i.e. 0 is equivalent to, but more efficient than, strlen(s)).
• utf8towc() doesn't set errno.

Returns:

0

The s argument points to the null character.

> 0

The number of bytes that comprise the multibyte character, to a maximum of UTF8_LEN_MAX (if the next n or fewer bytes form a valid multibyte character).

-1

The next n bytes don't form a valid (complete) multibyte character.

Classification:

Photon

Safety:
Interrupt handler	No
Signal handler	No
Thread	No

See also:

wctoutf8()

Unicode Multilingual Support in the Photon Programmer's Guide

mbtowc() in the QNX Neutrino Library Reference

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