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66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/* Iterator for grouping a number while scanning it forward.
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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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#ifndef GROUPING_ITERATOR_H
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#define GROUPING_ITERATOR_H
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#include <locale.h>
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#include <stdbool.h>
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struct grouping_iterator
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{
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/* Number of characters in the current group. If this reaches zero,
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a thousands separator needs to be emittted. */
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unsigned int remaining_in_current_group;
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/* Number of characters remaining in the number. This is used to
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detect the start of the non-repeating groups. */
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unsigned int remaining;
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/* Points to the current grouping descriptor. */
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const char *groupings;
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/* Total number of characters in the non-repeating groups. */
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unsigned int non_repeating_groups;
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/* Number of separators that will be inserted if the whole number is
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processed. (Does not change during iteration.) */
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unsigned int separators;
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};
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struct __locale_data;
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/* Initializes *IT with the data from LOCDATA (which must be for
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LC_MONETARY or LC_NUMERIC). DIGITS is the length of the number.
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Returns true if grouping is active, false if not. */
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bool __grouping_iterator_init (struct grouping_iterator *it,
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int category, locale_t loc,
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unsigned int digits) attribute_hidden;
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/* Initializes *IT with no grouping information for a string of length
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DIGITS, and return false to indicate no grouping. */
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bool __grouping_iterator_init_none (struct grouping_iterator *it,
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unsigned int digits)
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attribute_hidden;
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/* Advances to the next character and returns true if a thousands
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separator should be inserted before emitting it. */
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bool __grouping_iterator_next (struct grouping_iterator *it);
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#endif /* GROUPING_ITERATOR_H */
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