memory_file_substring(+Handle,
?Before, ?Length, ?After, -SubString)SubString is a substring of the memory file. There are
Before characters in the memory file before SubString,
SubString contains Length character and is
followed by
After characters in the memory file. The signature is the
same as
sub_string/5
and sub_atom/5,
but currently at least two of the 3 position arguments must be
specified. Future versions might implement the full functionality of sub_string/5.