Format
#include <stdio.h>
#include <wchar.h>
int wctob(wint_t wc);Language Level: ANSI
Threadsafe: Yes.
Locale Sensitive: The behavior of this function might be affected by the LC_CTYPE category of the current locale. The behavior 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. This function is not available when LOCALETYPE(*CLD) 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 wctob() function determines whether wc corresponds to a member of the extended character set, whose multibyte character has a length of 1 byte when in the initial shift state.
Return Value
If c corresponds to a multibyte character with a length of 1 byte, the wctob() function returns the single-byte representation. Otherwise, it returns EOF.
If a conversion error occurs, errno may be set to ECONVERT.
Example that uses wctob()
This example uses the wctob() function to test if the wide character A is a valid single-byte character.
#include <stdio.h>
#include <wchar.h>
int main(void)
{
wint_t wc = L'A';
if (wctob(wc) == wc)
printf("%lc is a valid single byte character\n", wc);
else
printf("%lc is not a valid single byte character\n", wc);
return 0;
/************************************************************
The output should be similar to:
A is a valid single byte character
************************************************************/
}Related Information