#include <linux/ucs2_string.h>#include <linux/module.h> /* Return the number of unicode characters in data */unsigned longucs2_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 longucs2_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 longucs2_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); intucs2_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);