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/*
* Copyright (C) 2021, Stephan Mueller <smueller@chronox.de>
*
* License: see LICENSE file in root directory
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
* WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
#ifndef JITTERENTROPY_GCD_H
#define JITTERENTROPY_GCD_H
#ifdef __cplusplus
extern "C"
{
#endif
int jent_gcd_analyze(uint64_t *delta_history, size_t nelem);
uint64_t *jent_gcd_init(size_t nelem);
void jent_gcd_fini(uint64_t *delta_history, size_t nelem);
int jent_gcd_get(uint64_t *value);
int jent_gcd_selftest(void);
/* Watch for common adjacent GCD values */
#define jent_gcd_add_value(delta_history, delta, idx) \
delta_history[idx] = delta;
#ifdef __cplusplus
}
#endif
#endif /* JITTERENTROPY_GCD_H */
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