Line data    Source code

       1             : #include <tommath.h>
       2             : #ifdef BN_MP_INIT_SIZE_C
       3             : /* LibTomMath, multiple-precision integer library -- Tom St Denis
       4             :  *
       5             :  * LibTomMath is a library that provides multiple-precision
       6             :  * integer arithmetic as well as number theoretic functionality.
       7             :  *
       8             :  * The library was designed directly after the MPI library by
       9             :  * Michael Fromberger but has been written from scratch with
      10             :  * additional optimizations in place.
      11             :  *
      12             :  * The library is free for all purposes without any express
      13             :  * guarantee it works.
      14             :  *
      15             :  * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
      16             :  */
      17             : 
      18             : /* init an mp_init for a given size */
      19       20354 : int mp_init_size (mp_int * a, int size)
      20             : {
      21             :   int x;
      22             : 
      23             :   /* pad size so there are always extra digits */
      24       20354 :   size += (MP_PREC * 2) - (size % MP_PREC);
      25             : 
      26             :   /* alloc mem */
      27       20354 :   a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * size);
      28       20354 :   if (a->dp == NULL) {
      29           0 :     return MP_MEM;
      30             :   }
      31             : 
      32             :   /* set the members */
      33       20354 :   a->used  = 0;
      34       20354 :   a->alloc = size;
      35       20354 :   a->sign  = MP_ZPOS;
      36             : 
      37             :   /* zero the digits */
      38     3959906 :   for (x = 0; x < size; x++) {
      39     3939552 :       a->dp[x] = 0;
      40             :   }
      41             : 
      42       20280 :   return MP_OKAY;
      43             : }
      44             : #endif
      45             : 
      46             : /* $Source: /cvs/libtom/libtommath/bn_mp_init_size.c,v $ */
      47             : /* $Revision: 1.4 $ */
      48             : /* $Date: 2006/12/28 01:25:13 $ */