Format
#include <stdlib.h>
int mbtowc(wchar_t *pwc, const char *string, size_t n);Language Level: ANSI
Threadsafe: No. Use mbrtowc() instead.
Locale Sensitive: The behavior of this function might be affected by the LC_CTYPE category of the current locale. This function might also be affected by the LC_UNI_CTYPE category of the current locale if LOCALETYPE(*LOCALEUCS2) or LOCALETYPE(*LOCALEUTF) is specified on the compilation command. For more information, see Understanding CCSIDs and Locales.
Wide Character Function: See Wide Characters for more information.
Description
The mbtowc() function first determines the length of the multibyte character pointed to by string. It then converts the multibyte character to a wide character as described in mbstowcs. A maximum of n bytes are examined.
Return Value
If string is NULL, the mbtowc() function returns:
If string is not NULL, the mbtowc() function returns:
If a conversion error occurs, errno might be set to ECONVERT.
Example that uses mbtowc()
This example uses the mblen() and mbtowc() functions to convert a multibyte character into a single wide character.
#include <stdio.h>
#include <stdlib.h>
#define LOCNAME "qsys.lib/mylib.lib/ja_jp959.locale"
/*Locale created from source JA_JP and CCSID 939 */
int length, temp;
char string [] = "\x0e\x41\x71\x0f";
wchar_t arr[6];
int main(void)
{
/* initialize internal state variable */
temp = mbtowc(arr, NULL, 0);
setlocale (LC_ALL, LOCNAME);
/* Set string to point to a multibyte character. */
length = mblen(string, MB_CUR_MAX);
temp = mbtowc(arr,string,length);
arr[1] = L'\0';
printf("wide character string: %ls",arr);
}Related Information