wscncasecmp

jsbmbp13:/tmp$ uname -a
Darwin jsbmbp13.local 15.6.0 Darwin Kernel Version 15.6.0: Thu Jun 23 18:25:34 PDT 2016; root:xnu-3248.60.10~1/RELEASE_X86_64 x86_64
jsbmbp13:/tmp$ locale
LANG="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_CTYPE="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_ALL=
jsbmbp13:/tmp$ cat wcsncasecmp.cpp
#include<wchar.h>
#include<stdio.h>
#include<stdlib.h>

int main(void) {
    wchar_t s1[1024];
    wchar_t s2[1024];
    size_t n = 3;

    int e = mbstowcs(s1, "SET", 3);
    e = mbstowcs(s2, "SET", 3);

    int ret = wcsncasecmp(s1, s2, n);
    printf("ret: %i\n", ret);
    return 0;
}
jsbmbp13:/tmp$ ./a.out
ret: 0

===

james@smartos-dev:/tmp % uname -a                                                                                                            16-08-31 2:02:29
SunOS smartos-dev 5.11 joyent_20160731T153326Z i86pc i386 i86pc Solaris
james@smartos-dev:/tmp % locale                                                                                                              16-08-31 2:04:54
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_ALL=
james@smartos-dev:/tmp % cat wcsncasecmp.cpp                                                                                                 16-08-31 2:04:25
#include<wchar.h>
#include<stdio.h>
#include<stdlib.h>

int main(void) {
    wchar_t s1[1024];
    wchar_t s2[1024];
    size_t n = 3;

    int e = mbstowcs(s1, "SET", 3);
    e = mbstowcs(s2, "SET", 3);

    int ret = wcsncasecmp(s1, s2, n);
    printf("ret: %i\n", ret);
    return 0;
}
james@smartos-dev:/tmp % ./a.out                                                                                                             16-08-31 2:04:32
ret: 641