buffer_frombuf - initialize buffer structure from raw memory

       buffer_frombuf  makes a virtual read buffer from a raw memory area.  The buffer reading functions will be
       able to read until the end of the data in the memory area, then signal EOF.  The buffer does not have its
       own buffer space, it reuses the one passed into this function.

       Do not touch this memory until you are done with the buffer!

       Reading data from the buffer will not change the memory you passed in.

       buffer_frombuf - initialize buffer structure from raw memory

buffer_fromsa(3), buffer_init(3), buffer(3), buffer_frombuf(3)

                                                                                               buffer_frombuf(3)

#include<libowfat/buffer.h>

       void buffer_frombuf(buffer* b,const char* x, size_t l);