| 1 | /* Iterator for grouping a number while scanning it forward. |
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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 | #ifndef GROUPING_ITERATOR_H |
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| 20 | #define GROUPING_ITERATOR_H |
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| 21 | |
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| 22 | #include <locale.h> |
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| 23 | #include <stdbool.h> |
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| 24 | |
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| 25 | struct grouping_iterator |
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| 26 | { |
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| 27 | /* Number of characters in the current group. If this reaches zero, |
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| 28 | a thousands separator needs to be emittted. */ |
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| 29 | unsigned int remaining_in_current_group; |
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| 30 | |
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| 31 | /* Number of characters remaining in the number. This is used to |
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| 32 | detect the start of the non-repeating groups. */ |
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| 33 | unsigned int remaining; |
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| 34 | |
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| 35 | /* Points to the current grouping descriptor. */ |
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| 36 | const char *groupings; |
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| 37 | |
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| 38 | /* Total number of characters in the non-repeating groups. */ |
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| 39 | unsigned int non_repeating_groups; |
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| 40 | |
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| 41 | /* Number of separators that will be inserted if the whole number is |
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| 42 | processed. (Does not change during iteration.) */ |
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| 43 | unsigned int separators; |
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| 44 | }; |
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| 45 | |
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| 46 | struct __locale_data; |
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| 47 | |
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| 48 | /* Initializes *IT with the data from LOCDATA (which must be for |
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| 49 | LC_MONETARY or LC_NUMERIC). DIGITS is the length of the number. |
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| 50 | Returns true if grouping is active, false if not. */ |
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| 51 | bool __grouping_iterator_init (struct grouping_iterator *it, |
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| 52 | int category, locale_t loc, |
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| 53 | unsigned int digits) attribute_hidden; |
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| 54 | |
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| 55 | /* Initializes *IT with no grouping information for a string of length |
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| 56 | DIGITS, and return false to indicate no grouping. */ |
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| 57 | bool __grouping_iterator_init_none (struct grouping_iterator *it, |
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| 58 | unsigned int digits) |
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| 59 | attribute_hidden; |
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| 60 | |
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| 61 | /* Advances to the next character and returns true if a thousands |
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| 62 | separator should be inserted before emitting it. */ |
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| 63 | bool __grouping_iterator_next (struct grouping_iterator *it); |
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| 64 | |
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| 65 | #endif /* GROUPING_ITERATOR_H */ |
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| 66 | |
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