validation_XX_SQUARE.c (1480B)
1 /* 2 This file is part of Anastasis 3 Copyright (C) 2020, 2021 Anastasis SARL 4 5 Anastasis is free software; you can redistribute it and/or modify it under the 6 terms of the GNU General Public License as published by the Free Software 7 Foundation; either version 3, or (at your option) any later version. 8 9 Anastasis is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License along with 14 Anastasis; see the file COPYING.GPL. If not, see <http://www.gnu.org/licenses/> 15 */ 16 /** 17 * @file reducer/validation_XX_SQUARE.c 18 * @brief anastasis reducer api 19 * @author Christian Grothoff 20 * @author Dominik Meister 21 * @author Dennis Neufeld 22 */ 23 #include <string.h> 24 #include <stdbool.h> 25 #include <stdio.h> 26 #include <math.h> 27 28 /** 29 * Function to validate a square number. 30 * 31 * @param sq_number square number to validate (input) 32 * @return true if sq_number is a square, else false 33 */ 34 bool 35 XX_SQUARE_check (const char *sq_number); 36 37 /* declaration to fix compiler warning */ 38 bool 39 XX_SQUARE_check (const char *sq_number) 40 { 41 unsigned long long n; 42 unsigned long long r; 43 char dummy; 44 45 if (1 != sscanf (sq_number, 46 "%llu%c", 47 &n, 48 &dummy)) 49 return false; 50 r = sqrt (n); 51 return (n == r * r); 52 }