newlib/libc/stdlib/__ten_mu.c

   1 /*
   2  * [atw] multiply 64 bit accumulator by 10 and add digit.
   3  * The KA/CA way to do this should be to use
   4  * a 64-bit integer internally and use "adjust" to
   5  * convert it to float at the end of processing.
   6  */
   7
   8 #include <_ansi.h>
   9 #include "std.h"
  10
  11 int
  12 __ten_mul (double *acc,
  13         int digit)
  14 {
  15   /*
  16    * [atw] Crude, but effective (at least on a KB)...
  17    */
  18
  19   *acc *= 10;
  20   *acc += digit;
  21
  22   return 0;                     /* no overflow */
  23 }