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43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* Compute the printf width of a sequence of ASCII digits.
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Copyright (C) 2022-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <assert.h>
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#include <limits.h>
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#include <locale/localeinfo.h>
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#include <printf.h>
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int
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__translated_number_width (locale_t loc, const char *first, const char *last)
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{
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struct lc_ctype_data *ctype = loc->__locales[LC_CTYPE]->private;
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if (ctype->outdigit_bytes_all_equal > 0)
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return (last - first) * ctype->outdigit_bytes_all_equal;
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else
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{
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/* Digits have varying length, so the fast path cannot be used. */
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int digits = 0;
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for (const char *p = first; p < last; ++p)
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{
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assert ('0' <= *p && *p <= '9');
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digits += ctype->outdigit_bytes[*p - '0'];
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}
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return digits;
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}
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}
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