The mbrtowc() function in C/C++ converts multibyte sequence to wide characters. This function returns the length in bytes of a multibyte character. The multibyte character pointed by s is converted to a value of type wchar_t and stored at the location pointed by pwc. If s points to a null character, the function resets the shift state and returns zero after storing the wide null character at pwc.
size_t mbrtowc (wchar_t* pwc, const char* pmb, size_t max, mbstate_t* ps)
Parameter: The function accepts four parameters as described below:
- 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
Return value: The function returns four value as follows:
- If, null wide character or if pmb is a null pointer, the function returns 0
- the number of bytes [1…n] of the multibyte character successfully converted from s
- If the max first characters of pmb form an incomplete multibyte character, the function returns length-2
- Otherwise, function returns length-1 and it sets errno to EILSEQ
Note: None of the values possibly returned is less than zero.
Below programs illustrate the above function:
Next 1 bytes are the character z Next 2 bytes are the character Ã? Next 3 bytes are the character æ°´ Next 4 bytes are the character ð??
Next 3 bytes are the character â?? Next 1 bytes are the character y Next 3 bytes are the character â?? Next 1 bytes are the character x Next 2 bytes are the character Â¬
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Improved By : shubham_singh