/* mpihelp-sub.c  -  MPI helper functions *	Copyright (C) 1994, 1996 Free Software Foundation, Inc. *	Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. * * This file is part of GnuPG. * * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * GnuPG is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * * Note: This code is heavily based on the GNU MP Library. *	 Actually it's the same code with only minor changes in the *	 way the data is stored; this is to support the abstraction *	 of an optional secure memory allocation which may be used *	 to avoid revealing of sensitive data due to paging etc. *	 The GNU MP Library itself is published under the LGPL; *	 however I decided to publish this code under the plain GPL. */ #include "mpi-internal.h" /**************** * Compare OP1_PTR/OP1_SIZE with OP2_PTR/OP2_SIZE. * There are no restrictions on the relative sizes of * the two arguments. * Return 1 if OP1 > OP2, 0 if they are equal, and -1 if OP1 < OP2. */int mpihelp_cmp(mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size){	mpi_size_t i;	mpi_limb_t op1_word, op2_word; 	for (i = size - 1; i >= 0; i--) {		op1_word = op1_ptr[i];		op2_word = op2_ptr[i];		if (op1_word != op2_word)			goto diff;	}	return 0; diff:	/* This can *not* be simplified to	 *   op2_word - op2_word	 * since that expression might give signed overflow.  */	return (op1_word > op2_word) ? 1 : -1;}