normal_negative.h

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/*
 * Copyright (c) 2018 XLAB d.o.o.
 *
 * 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.
 */
 
#ifndef CIFER_NORMAL_NEGATIVE_H
#define CIFER_NORMAL_NEGATIVE_H
 
#include "cifer/sample/normal.h"
 
typedef struct cfe_normal_negative {
    cfe_normal nor;
    mpz_t cut;                  // cut defines from which interval we sample
    mpz_t twice_cut_plus_one;   // precomputed value so we do not need to calculate it each time
} cfe_normal_negative;
 
void cfe_normal_negative_init(cfe_normal_negative *s, mpf_t sigma, size_t n);
 
void cfe_normal_negative_free(cfe_normal_negative *s);
 
void cfe_normal_negative_sample(mpz_t res, cfe_normal_negative *s);
 
void cfe_normal_negative_sample_vec(cfe_vec *res, cfe_normal_negative *s);
 
void cfe_normal_negative_sample_mat(cfe_mat *res, cfe_normal_negative *s);
 
#endif