#include <tommath.h>
#ifdef BN_MP_READ_UNSIGNED_BIN_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis
 *
 * LibTomMath is a library that provides multiple-precision
 * integer arithmetic as well as number theoretic functionality.
 *
 * The library was designed directly after the MPI library by
 * Michael Fromberger but has been written from scratch with
 * additional optimizations in place.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 *
 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
 */

/* reads a unsigned char array, assumes the msb is stored first [big endian] */
int mp_read_unsigned_bin(mp_int * a, const unsigned char *b, int c)
{
	int res;

	/* make sure there are at least two digits */
	if (a->alloc < 2) {
		if ((res = mp_grow(a, 2)) != MP_OKAY) {
			return res;
		}
	}

	/* zero the int */
	mp_zero(a);

	/* read the bytes in */
	while (c-- > 0) {
		if ((res = mp_mul_2d(a, 8, a)) != MP_OKAY) {
			return res;
		}
#ifndef MP_8BIT
		a->dp[0] |= *b++;
		a->used += 1;
#else
		a->dp[0] = (*b & MP_MASK);
		a->dp[1] |= ((*b++ >> 7U) & 1);
		a->used += 2;
#endif
	}
	mp_clamp(a);
	return MP_OKAY;
}
#endif

/* $Source: /cvs/libtom/libtommath/bn_mp_read_unsigned_bin.c,v $ */
/* $Revision: 1.5 $ */
/* $Date: 2006/12/28 01:25:13 $ */