text: #define CHECKLASTKNOWN(x, n) if (lastknownwrite && lastknownfile) { fwrite((x),1,(n)*sizeof(float),lastknownfile); } else if (lastknownfile) { fread(lastknownscratch,1,(n)*sizeof(float),lastknownfile); CHECK_BUF_SAME_LASTKNOWN((x), n); }
  