#include <linux/ucs2_string.h>
  #include <linux/module.h>
  
  /* Return the number of unicode characters in data */
  unsigned long
  ucs2_strnlen(const ucs2_char_t *s, size_t maxlength)
  {
          unsigned long length = 0;
  
          while (*s++ != 0 && length < maxlength)
                  length++;
          return length;
  }
  EXPORT_SYMBOL(ucs2_strnlen);
  
  unsigned long
  ucs2_strlen(const ucs2_char_t *s)
  {
          return ucs2_strnlen(s, ~0UL);
  }
  EXPORT_SYMBOL(ucs2_strlen);
  
  /*
   * Return the number of bytes is the length of this string
   * Note: this is NOT the same as the number of unicode characters
   */
  unsigned long
  ucs2_strsize(const ucs2_char_t *data, unsigned long maxlength)
  {
          return ucs2_strnlen(data, maxlength/sizeof(ucs2_char_t)) * sizeof(ucs2_char_t);
  }
  EXPORT_SYMBOL(ucs2_strsize);
  
  int
  ucs2_strncmp(const ucs2_char_t *a, const ucs2_char_t *b, size_t len)
  {
          while (1) {
                  if (len == 0)
                          return 0;
                  if (*a < *b)
                          return -1;
                  if (*a > *b)
                          return 1;
                  if (*a == 0) /* implies *b == 0 */
                          return 0;
                  a++;
                  b++;
                  len--;
          }
  }
  EXPORT_SYMBOL(ucs2_strncmp);