binaryArith.h

/* Copyright (C) 2012-2020 IBM Corp.
 * This program is Licensed under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *   http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. See accompanying LICENSE file.
 */
#ifndef HELIB_BINARYARITH_H
#define HELIB_BINARYARITH_H
 
#include <helib/EncryptedArray.h>
#include <helib/CtPtrs.h> //  defines CtPtrs, CtPtrMat
 
namespace helib {
 
std::vector<long> longToBitVector(long num, long bitSize);
 
void binaryCond(CtPtrs& output,
                const Ctxt& cond,
                const CtPtrs& trueValue,
                const CtPtrs& falseValue);
 
void binaryMask(CtPtrs& binaryNums, const Ctxt& mask);
 
void concatBinaryNums(CtPtrs& output, const CtPtrs& a, const CtPtrs& b);
 
void splitBinaryNums(CtPtrs& leftSplit,
                     CtPtrs& rightSplit,
                     const CtPtrs& input);
 
void leftBitwiseShift(CtPtrs& output, const CtPtrs& input, const long shamt);
 
void bitwiseRotate(CtPtrs& output, const CtPtrs& input, long rotamt);
 
void bitwiseXOR(CtPtrs& output, const CtPtrs& lhs, const CtPtrs& rhs);
 
void bitwiseOr(CtPtrs& output, const CtPtrs& lhs, const CtPtrs& rhs);
 
void bitwiseAnd(CtPtrs& output, const CtPtrs& lhs, const CtPtrs& rhs);
 
void bitwiseAnd(CtPtrs& output,
                const CtPtrs& input,
                const std::vector<long> mask);
 
void bitwiseNot(CtPtrs& output, const CtPtrs& input);
 
void addTwoNumbers(CtPtrs& sum,
                   const CtPtrs& lhs,
                   const CtPtrs& rhs,
                   long sizeLimit = 0,
                   std::vector<zzX>* unpackSlotEncoding = nullptr);
 
void negateBinary(CtPtrs& negation, const CtPtrs& input);
 
void subtractBinary(CtPtrs& difference,
                    const CtPtrs& lhs,
                    const CtPtrs& rhs,
                    std::vector<zzX>* unpackSlotEncoding = nullptr);
long fifteenOrLess4Four(const CtPtrs& out,
                        const CtPtrs& in,
                        long sizeLimit = 4);
 
void addManyNumbers(CtPtrs& sum,
                    CtPtrMat& numbers,
                    long sizeLimit = 0,
                    std::vector<zzX>* unpackSlotEncoding = nullptr);
 
void multTwoNumbers(CtPtrs& product,
                    const CtPtrs& lhs,
                    const CtPtrs& rhs,
                    bool rhsTwosComplement = false,
                    long sizeLimit = 0,
                    std::vector<zzX>* unpackSlotEncoding = nullptr);
 
void decryptBinaryNums(std::vector<long>& pNums,
                       const CtPtrs& eNums,
                       const SecKey& sKey,
                       const EncryptedArray& ea,
                       bool twosComplement = false,
                       bool allSlots = true);
 
void packedRecrypt(const CtPtrs& a,
                   const CtPtrs& b,
                   std::vector<zzX>* unpackSlotEncoding);
 
} // namespace helib
#endif // ifndef HELIB_BINARYARITH_H