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Diffstat (limited to 'src/reducer/validation_FR_INSEE.c')
-rw-r--r-- | src/reducer/validation_FR_INSEE.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/reducer/validation_FR_INSEE.c b/src/reducer/validation_FR_INSEE.c new file mode 100644 index 0000000..19d81fd --- /dev/null +++ b/src/reducer/validation_FR_INSEE.c @@ -0,0 +1,66 @@ +/* + This file is part of Anastasis + Copyright (C) 2022 Anastasis SARL + + Anastasis is free software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + Anastasis is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + Anastasis; see the file COPYING.GPL. If not, see <http://www.gnu.org/licenses/> +*/ +/** + * @file reducer/validation_FR_INSEE.c + * @brief Validation for French INSEE Numbers + * @author Christian Grothoff + */ +#include <string.h> +#include <stdbool.h> +#include <stdio.h> + + +/** + * Function to validate a French INSEE number. + * + * See https://en.wikipedia.org/wiki/INSEE_code + * + * Note that we do not implement checks on the month + * and also allow non-binary prefixes. + * + * @param insee_number social security number to validate (input) + * @return true if validation passed, else false + */ +bool +FR_INSEE_check (const char *insee_number) +{ + char pfx[14]; + unsigned long long num; + unsigned int cc; + char dum; + + if (strlen (insee_number) != 15) + return false; + memcpy (pfx, + insee_number, + 13); + pfx[13] = '\0'; + if (1 != + sscanf (pfx, + "%llu%c", + &num, + &dum)) + return false; + if (1 != + sscanf (&insee_number[13], + "%u%c", + &cc, + &dum)) + return false; + if (97 - cc != num % 97) + return false; + return true; +} |