Makes the data at the begging of an evbuffer contiguous.
@param buf the evbuffer to make contiguous @param size the number of bytes to make contiguous, or -1 to make the entire buffer contiguous. @return a pointer to the contiguous memory array
See Implementation
Makes the data at the begging of an evbuffer contiguous.
@param buf the evbuffer to make contiguous @param size the number of bytes to make contiguous, or -1 to make the entire buffer contiguous. @return a pointer to the contiguous memory array