mbrtowc
| Defined in header <wchar.h>
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| size_t mbrtowc( wchar_t* pwc, const char* s, size_t n, mbstate_t* ps );
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Converts a narrow multibyte character to a wide character.
If 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 the corresponding wide character and stores it in *pwc (if pwc is not null).
If s is a null pointer, the values of n and pwc are ignored and call is equivalent to mbrtowc(NULL, "", 1, ps).
If the wide character produced is the null character, the conversion state stored in *ps is the initial shift state.
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[edit] Parameters
| pwc | - | pointer to the location where the resulting wide character 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 used when interpreting the multibyte string |
[edit] Return value
The first of the following that applies:
- 0 if the character converted from s (and stored in pwc if non-null) was the null character
- the number of bytes [1...n] of the multibyte character successfully converted from s
- (size_t)-2 if the next n bytes constitute an incomplete, but so far valid, multibyte character. Nothing is written to *pwc.
- (size_t)-1 if encoding error occurs. Nothing is written to *pwc, the value EILSEQ is stored in errno and the value of *ps is left unspecified.
[edit] Example
| This section is incomplete Reason: no example |
[edit] See also
| converts the next multibyte character to wide character (function) |
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| converts a wide character to its multibyte representation, given state (function) |
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