1 /* Test wide character for being a hexadecimal digit. 2 Copyright (C) 2020-2021 Free Software Foundation, Inc. 3 4 This file is free software: you can redistribute it and/or modify 5 it under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 This file is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 #include <config.h> 18 19 /* Specification. */ 20 #include <wctype.h> 21 22 int 23 iswxdigit (wint_t wc) /* */ 24 { 25 return ((wc >= '0' && wc <= '9') 26 #if 'A' == 0x41 && 'a' == 0x61 27 /* Optimization, assuming ASCII */ 28 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F') 29 #else 30 || (wc >= 'A' && wc <= 'F') || (wc >= 'a' && wc <= 'f') 31 #endif 32 ); 33 }