| 1 | /* Compute the printf width of a sequence of ASCII digits. |
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| 2 | Copyright (C) 2022-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <assert.h> |
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| 20 | #include <limits.h> |
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| 21 | #include <locale/localeinfo.h> |
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| 22 | #include <printf.h> |
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| 23 | |
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| 24 | int |
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| 25 | __translated_number_width (locale_t loc, const char *first, const char *last) |
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| 26 | { |
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| 27 | struct lc_ctype_data *ctype = loc->__locales[LC_CTYPE]->private; |
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| 28 | |
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| 29 | if (ctype->outdigit_bytes_all_equal > 0) |
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| 30 | return (last - first) * ctype->outdigit_bytes_all_equal; |
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| 31 | else |
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| 32 | { |
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| 33 | /* Digits have varying length, so the fast path cannot be used. */ |
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| 34 | int digits = 0; |
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| 35 | for (const char *p = first; p < last; ++p) |
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| 36 | { |
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| 37 | assert ('0' <= *p && *p <= '9'); |
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| 38 | digits += ctype->outdigit_bytes[*p - '0']; |
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| 39 | } |
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| 40 | return digits; |
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| 41 | } |
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| 42 | } |
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| 43 | |
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