1 /******************************************************************************* 2 * Copyright 2002-2018 Intel Corporation 3 * All Rights Reserved. 4 * 5 * If this software was obtained under the Intel Simplified Software License, 6 * the following terms apply: 7 * 8 * The source code, information and material ("Material") contained herein is 9 * owned by Intel Corporation or its suppliers or licensors, and title to such 10 * Material remains with Intel Corporation or its suppliers or licensors. The 11 * Material contains proprietary information of Intel or its suppliers and 12 * licensors. The Material is protected by worldwide copyright laws and treaty 13 * provisions. No part of the Material may be used, copied, reproduced, 14 * modified, published, uploaded, posted, transmitted, distributed or disclosed 15 * in any way without Intel's prior express written permission. No license under 16 * any patent, copyright or other intellectual property rights in the Material 17 * is granted to or conferred upon you, either expressly, by implication, 18 * inducement, estoppel or otherwise. Any license under such intellectual 19 * property rights must be express and approved by Intel in writing. 20 * 21 * Unless otherwise agreed by Intel in writing, you may not remove or alter this 22 * notice or any other notice embedded in Materials by Intel or Intel's 23 * suppliers or licensors in any way. 24 * 25 * 26 * If this software was obtained under the Apache License, Version 2.0 (the 27 * "License"), the following terms apply: 28 * 29 * You may not use this file except in compliance with the License. You may 30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 31 * 32 * 33 * Unless required by applicable law or agreed to in writing, software 34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 36 * 37 * See the License for the specific language governing permissions and 38 * limitations under the License. 39 *******************************************************************************/ 40 41 /* 42 // Intel(R) Integrated Performance Primitives 43 // Cryptographic Primitives (ippcp) 44 // 45 // Contents: 46 // ippsCmpZero_BN() 47 // 48 */ 49 50 #include "owndefs.h" 51 #include "owncp.h" 52 #include "pcpbn.h" 53 #include "pcptool.h" 54 55 56 /*F* 57 // Name: ippsCmpZero_BN 58 // 59 // Purpose: Compare BigNum value with zero. 60 // 61 // Returns: Reason: 62 // ippStsNullPtrErr pBN == NULL 63 // pResult == NULL 64 // ippStsContextMatchErr !BN_VALID_ID(pBN) 65 // ippStsNoErr no errors 66 // 67 // Parameters: 68 // pBN BigNum ctx 69 // pResult result of comparison 70 // 71 *F*/ 72 IPPFUN(IppStatus, ippsCmpZero_BN, (const IppsBigNumState* pBN, Ipp32u* pResult)) 73 { 74 IPP_BAD_PTR2_RET(pBN, pResult); 75 76 pBN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pBN, BN_ALIGNMENT) ); 77 IPP_BADARG_RET(!BN_VALID_ID(pBN), ippStsContextMatchErr); 78 79 if(BN_SIZE(pBN)==1 && BN_NUMBER(pBN)[0]==0) 80 *pResult = IS_ZERO; 81 else if (BN_SIGN(pBN)==ippBigNumPOS) 82 *pResult = GREATER_THAN_ZERO; 83 else if (BN_SIGN(pBN)==ippBigNumNEG) 84 *pResult = LESS_THAN_ZERO; 85 86 return ippStsNoErr; 87 } 88
