hashes.js
function int64copy(dst, src) {
        dst.h = src.h;
        dst.l = src.l;
      }
function int64copy(dst, src) {
        dst.h = src.h;
        dst.l = src.l;
      }
function int64copy ( dst , src ) { dst . h = src . h ; dst . l = src . l ; }
Copies src into dst, assuming both are 64-bit numbers
Copies src into dst assuming both are 64 - bit numbers