34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
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/* Test wide character for being a hexadecimal digit.
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Copyright (C) 2020 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <wctype.h>
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int
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iswxdigit (wint_t wc)
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{
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return ((wc >= '0' && wc <= '9')
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#if 'A' == 0x41 && 'a' == 0x61
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/* Optimization, assuming ASCII */
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|| ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F')
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#else
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|| (wc >= 'A' && wc <= 'F') || (wc >= 'a' && wc <= 'f')
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#endif
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);
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}
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