-unsigned int csum_partial_copy_to(const char *src, char *dst, int len,
- int sum, int *err_ptr);
-unsigned int csum_partial_copy_from(const char *src, char *dst, int len,
- int sum, int *err_ptr);
+unsigned int csum_partial_copy_to(const unsigned char *src, unsigned char *dst,
+ int len, int sum, int *err_ptr);
+unsigned int csum_partial_copy_from(const unsigned char *src, unsigned char *dst,
+ int len, int sum, int *err_ptr);