Defined in header
Converts a narrow multibyte character to UTF-8 encoding.
s is not a null pointer, inspects at most
n bytes of the multibyte character string, beginning with the byte pointed to by
s to determine the number of bytes necessary to complete the next multibyte character (including any shift sequences). If the function determines that the next multibyte character in
s is complete and valid, converts it to UTF-8 and stores the first UTF-8 code unit in *pc8 (if
pc8 is not null).
If UTF-8 encoding of the multibyte character in
*s consists of more than one UTF-8 code unit, then after the first call to this function,
*ps is updated in such a way that the next call to
mbrtoc8 will write out the additional UTF-8 code units, without considering
s is a null pointer, the values of
pc8 are ignored and the call is equivalent to std::mbrtoc8(nullptr, "", 1, ps).
If UTF-8 code unit produced is u8'\0', the conversion state *ps represents the initial shift state.
The multibyte encoding used by this function is specified by the currently active C locale.
|pc8||-||pointer to the location where the resulting UTF-8 code units will be written|
|s||-||pointer to the multibyte character string used as input|
|n||-||limit on the number of bytes in s that can be examined|
|ps||-||pointer to the conversion state object used when interpreting the multibyte string|
 Return value
The first of the following that applies:
- 0 if the character converted from
s(and stored in *pc8 if non-null) was the null character
- the number of bytes [1...n] of the multibyte character successfully converted from
- -3 if the next UTF-8 code unit from a character whose encoding consists of multiple code units has now been written to *pc8. No bytes are processed from the input in this case.
- -2 if the next
nbytes constitute an incomplete, but so far valid, multibyte character. Nothing is written to *pc8.
- -1 if encoding error occurs. Nothing is written to
*pc8, the value EILSEQ is stored in errno and the value of *ps is unspecified.
|This section is incomplete|
Reason: no example
 See also
| converts UTF-8 string to narrow multibyte encoding |