Duplicate a substring of a string.
@param s String to be duplicated @param len Maximum length of the resulting string (not counting the terminating byte) @return Pointer to a newly-allocated string containing a substring of s or NULL if the string cannot be allocated
See Implementation
Duplicate a substring of a string.
@param s String to be duplicated @param len Maximum length of the resulting string (not counting the terminating byte) @return Pointer to a newly-allocated string containing a substring of s or NULL if the string cannot be allocated