mpf_div_d.c

来自「精确小数算法库,可以实现任意长度的精确小数算法,用c语言实现,主要用于密码学中小」· C语言 代码 · 共 32 行

/* LibTomFloat, multiple-precision floating-point library
 *
 * LibTomFloat is a library that provides multiple-precision
 * floating-point artihmetic as well as trigonometric functionality.
 *
 * This library requires the public domain LibTomMath to be installed.
 * 
 * This library is free for all purposes without any express
 * gurantee it works
 *
 * Tom St Denis, [e-mail], http://float.libtomcrypt.org
 */
#include <tomfloat.h>

int  mpf_div_d(mp_float *a, long b, mp_float *c)
{
   int      err;
   mp_float tmp;

   if ((err = mpf_init(&tmp, c->radix)) != MP_OKAY) {
      return err;
   }

   if ((err = mpf_const_d(&tmp, b)) != MP_OKAY)              { goto __ERR; }
   err = mpf_div(a, &tmp, c);

__ERR:
   mpf_clear(&tmp);
   return err;
}