strxfrm

#include <stdlib.h>
size_t strxfrm(char *str1, const char *str2, size_t n);

The function strxfrm () transforms a null-terminated C string according to local settings. Thus the string can be safely compared using strcmp () with another. The transformed string is stored in a new string.

/* 
 * strxfrm example code
 * http://code-reference.com/c/string.h/strxfrm
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
int main(void)
 {
    char *target, *dst, *source;
    int length;
 
    source  = "the answer: life the universe & everything";
    dst = (char *) calloc(80, sizeof(char));
    length = strxfrm(target, source, 80);
    printf("%s has the length %d\n", target, length);
    return 0;
}

  the answer: life the universe & everything has the length 42