#include <unicode/ucol.h>
#include <err.h>

int main()
{
    UErrorCode status = U_ZERO_ERROR;

    UEnumeration* values =
	ucol_getKeywordValuesForLocale("co", "C", FALSE, &status);
    if (U_FAILURE(status))
	err(1, "ucol_getKeywordValuesForLocale");

    int32_t count = uenum_count(values, &status);
    if (U_FAILURE(status))
	err(1, "uenum_count");

    for (int i = 0; i < count; i++) {
	const char* collation = uenum_next(values, NULL, &status);
	if (U_FAILURE(status))
	    err(1, "uenum_next");
	warnx("%s", collation);
    }

    return 0;
}