pb_rawsize.c

   1 /* LibTomPoly, Polynomial Basis Math -- Tom St Denis
   2  *
   3  * LibTomPoly is a public domain library that provides
   4  * polynomial basis arithmetic support.  It relies on
   5  * LibTomMath for large integer support.
   6  *
   7  * This library is free for all purposes without any
   8  * express guarantee that it works.
   9  *
  10  * Tom St Denis, tomstdenis@iahu.ca, http://poly.libtomcrypt.org
  11  */
  12 #include <tompoly.h>
  13
  14 int pb_rawsize(pb_poly *a)
  15 {
  16    int x, y;
  17
  18    /* 2 bytes for # of coefficients */
  19    y = 2;
  20
  21    /* characteristic */
  22    y += 2 + mp_signed_bin_size(&(a->characteristic));
  23
  24    /* all of the terms */
  25    for (x = 0; x < a->used; x++) {
  26        y += 2 + mp_signed_bin_size(&(a->terms[x]));
  27    }
  28
  29    return y;
  30 }
  31
  32