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locale: Implement struct grouping_iterator
The iterator allows grouping while scanning forward through the digits. This enables emitting digits as they are processed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
parent
edd1b2a0d9
commit
ffde06c915
@ -39,6 +39,7 @@ routines := \
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gentempfd \
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getline \
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getw \
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grouping_iterator \
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iovfscanf \
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isoc99_fscanf \
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isoc99_scanf \
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@ -222,6 +223,10 @@ generated += \
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siglist-aux.S \
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# generated
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tests-internal = \
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tst-grouping_iterator \
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# tests-internal
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test-srcs = tst-unbputc tst-printf tst-printfsz-islongdouble
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ifeq ($(run-built-tests),yes)
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@ -299,7 +304,8 @@ LOCALES := \
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hi_IN.UTF-8 \
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ja_JP.EUC-JP \
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ps_AF.UTF-8 \
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# LOCALES
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tg_TJ.UTF-8 \
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# LOCALES
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include ../gen-locales.mk
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$(objpfx)bug14.out: $(gen-locales)
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@ -307,6 +313,7 @@ $(objpfx)scanf13.out: $(gen-locales)
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$(objpfx)test-vfprintf.out: $(gen-locales)
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$(objpfx)tst-grouping.out: $(gen-locales)
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$(objpfx)tst-grouping2.out: $(gen-locales)
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$(objpfx)tst-grouping_iterator.out: $(gen-locales)
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$(objpfx)tst-sprintf.out: $(gen-locales)
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$(objpfx)tst-sscanf.out: $(gen-locales)
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$(objpfx)tst-swprintf.out: $(gen-locales)
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126
stdio-common/grouping_iterator.c
Normal file
126
stdio-common/grouping_iterator.c
Normal file
@ -0,0 +1,126 @@
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/* Iterator for inserting thousands separators into numbers.
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Copyright (C) 2022 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 <grouping_iterator.h>
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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 <stdint.h>
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#include <string.h>
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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
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__grouping_iterator_init_none (struct grouping_iterator *it,
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unsigned int digits)
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{
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memset (it, 0, sizeof (*it));
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it->remaining_in_current_group = digits;
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it->remaining = digits;
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return false;
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}
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static bool
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grouping_iterator_setup (struct grouping_iterator *it, unsigned int digits,
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const char *grouping)
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{
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/* We treat all negative values like CHAR_MAX. */
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if (*grouping == CHAR_MAX || *grouping <= 0)
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/* No grouping should be done. */
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return __grouping_iterator_init_none (it, digits);
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unsigned int remaining_to_group = digits;
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unsigned int non_repeating_groups = 0;
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unsigned int groups = 0;
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while (true)
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{
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non_repeating_groups += *grouping;
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if (remaining_to_group <= (unsigned int) *grouping)
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break;
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++groups;
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remaining_to_group -= *grouping++;
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if (*grouping == CHAR_MAX
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#if CHAR_MIN < 0
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|| *grouping < 0
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#endif
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)
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/* No more grouping should be done. */
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break;
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else if (*grouping == 0)
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{
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/* Same grouping repeats. */
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--grouping;
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non_repeating_groups -= *grouping; /* Over-counted. */
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unsigned int repeats = (remaining_to_group - 1) / *grouping;
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groups += repeats;
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remaining_to_group -= repeats * *grouping;
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break;
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}
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}
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it->remaining_in_current_group = remaining_to_group;
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it->remaining = digits;
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it->groupings = grouping;
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it->non_repeating_groups = non_repeating_groups;
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it->separators = groups;
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return it->separators > 0;
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}
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/* Returns the appropriate grouping item in LOC depending on CATEGORY
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(which must be LC_MONETARY or LC_NUMERIC). */
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static const char *
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get_grouping (int category, locale_t loc)
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{
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return _nl_lookup (loc, category,
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category == LC_MONETARY ? MON_GROUPING : GROUPING);
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}
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bool
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__grouping_iterator_init (struct grouping_iterator *it,
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int category, locale_t loc, unsigned int digits)
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{
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if (digits <= 1)
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return __grouping_iterator_init_none (it, digits);
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else
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return grouping_iterator_setup (it, digits, get_grouping (category, loc));
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}
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bool
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__grouping_iterator_next (struct grouping_iterator *it)
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{
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assert (it->remaining > 0);
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--it->remaining;
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if (it->remaining_in_current_group > 0)
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{
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--it->remaining_in_current_group;
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return false;
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}
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/* If we are in the non-repeating part, switch group. */
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if (it->remaining < it->non_repeating_groups)
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--it->groupings;
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it->remaining_in_current_group = *it->groupings - 1;
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return true;
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}
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65
stdio-common/grouping_iterator.h
Normal file
65
stdio-common/grouping_iterator.h
Normal file
@ -0,0 +1,65 @@
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/* Iterator for grouping a number while scanning it forward.
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Copyright (C) 2022 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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262
stdio-common/tst-grouping_iterator.c
Normal file
262
stdio-common/tst-grouping_iterator.c
Normal file
@ -0,0 +1,262 @@
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/* Test for struct grouping_iterator.
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Copyright (C) 2022 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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/* Rebuild the fail to access internal-only functions. */
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#include <grouping_iterator.c>
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#include <stdio.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/test-driver.h>
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static void
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check (int lineno, const char *groupings,
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const char *input, const char *expected)
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{
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if (test_verbose)
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{
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printf ("info: %s:%d: \"%s\" via \"", __FILE__, lineno, input);
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for (const char *p = groupings; *p != 0; ++p)
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printf ("\\%o", *p & 0xff);
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printf ("\" to \"%s\"\n", expected);
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}
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size_t initial_group = strchrnul (expected, '\'') - expected;
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size_t separators = 0;
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for (const char *p = expected; *p != '\0'; ++p)
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separators += *p == '\'';
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size_t digits = strlen (input);
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char *out = xmalloc (2 * digits + 1);
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struct grouping_iterator it;
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TEST_COMPARE (grouping_iterator_setup (&it, digits, groupings),
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strchr (expected, '\'') != NULL);
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TEST_COMPARE (it.remaining, digits);
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TEST_COMPARE (it.remaining_in_current_group, initial_group);
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TEST_COMPARE (it.separators, separators);
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char *p = out;
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while (*input != '\0')
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{
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if (__grouping_iterator_next (&it))
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*p++ = '\'';
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TEST_COMPARE (it.separators, separators);
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*p++ = *input++;
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}
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*p++ = '\0';
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TEST_COMPARE (it.remaining, 0);
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TEST_COMPARE (it.remaining_in_current_group, 0);
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TEST_COMPARE_STRING (out, expected);
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free (out);
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}
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static int
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do_test (void)
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{
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check (__LINE__, "", "1", "1");
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check (__LINE__, "", "12", "12");
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check (__LINE__, "", "123", "123");
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check (__LINE__, "", "1234", "1234");
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check (__LINE__, "\3", "1", "1");
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check (__LINE__, "\3", "12", "12");
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check (__LINE__, "\3", "123", "123");
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check (__LINE__, "\3", "1234", "1'234");
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check (__LINE__, "\3", "12345", "12'345");
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check (__LINE__, "\3", "123456", "123'456");
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check (__LINE__, "\3", "1234567", "1'234'567");
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check (__LINE__, "\3", "12345678", "12'345'678");
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check (__LINE__, "\3", "123456789", "123'456'789");
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check (__LINE__, "\3", "1234567890", "1'234'567'890");
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check (__LINE__, "\2\3", "1", "1");
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check (__LINE__, "\2\3", "12", "12");
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check (__LINE__, "\2\3", "123", "1'23");
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check (__LINE__, "\2\3", "1234", "12'34");
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check (__LINE__, "\2\3", "12345", "123'45");
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check (__LINE__, "\2\3", "123456", "1'234'56");
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check (__LINE__, "\2\3", "1234567", "12'345'67");
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check (__LINE__, "\2\3", "12345678", "123'456'78");
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check (__LINE__, "\2\3", "123456789", "1'234'567'89");
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check (__LINE__, "\2\3", "1234567890", "12'345'678'90");
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check (__LINE__, "\3\2", "1", "1");
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check (__LINE__, "\3\2", "12", "12");
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check (__LINE__, "\3\2", "123", "123");
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check (__LINE__, "\3\2", "1234", "1'234");
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check (__LINE__, "\3\2", "12345", "12'345");
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check (__LINE__, "\3\2", "123456", "1'23'456");
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check (__LINE__, "\3\2", "1234567", "12'34'567");
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check (__LINE__, "\3\2", "12345678", "1'23'45'678");
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check (__LINE__, "\3\2", "123456789", "12'34'56'789");
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check (__LINE__, "\3\2", "1234567890", "1'23'45'67'890");
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check (__LINE__, "\3\2\1", "1", "1");
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check (__LINE__, "\3\2\1", "12", "12");
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check (__LINE__, "\3\2\1", "123", "123");
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check (__LINE__, "\3\2\1", "1234", "1'234");
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check (__LINE__, "\3\2\1", "12345", "12'345");
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check (__LINE__, "\3\2\1", "123456", "1'23'456");
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check (__LINE__, "\3\2\1", "1234567", "1'2'34'567");
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check (__LINE__, "\3\2\1", "12345678", "1'2'3'45'678");
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check (__LINE__, "\3\2\1", "123456789", "1'2'3'4'56'789");
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check (__LINE__, "\3\2\1", "1234567890", "1'2'3'4'5'67'890");
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check (__LINE__, "\2\3\1", "1", "1");
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check (__LINE__, "\2\3\1", "12", "12");
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check (__LINE__, "\2\3\1", "123", "1'23");
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check (__LINE__, "\2\3\1", "1234", "12'34");
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check (__LINE__, "\2\3\1", "12345", "123'45");
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check (__LINE__, "\2\3\1", "123456", "1'234'56");
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check (__LINE__, "\2\3\1", "1234567", "1'2'345'67");
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check (__LINE__, "\2\3\1", "12345678", "1'2'3'456'78");
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check (__LINE__, "\2\3\1", "123456789", "1'2'3'4'567'89");
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check (__LINE__, "\2\3\1", "1234567890", "1'2'3'4'5'678'90");
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/* No repeats. */
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check (__LINE__, "\3\377", "1", "1");
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check (__LINE__, "\3\377", "12", "12");
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check (__LINE__, "\3\377", "123", "123");
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check (__LINE__, "\3\377", "1234", "1'234");
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check (__LINE__, "\3\377", "12345", "12'345");
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check (__LINE__, "\3\377", "123456", "123'456");
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check (__LINE__, "\3\377", "1234567", "1234'567");
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check (__LINE__, "\3\377", "12345678", "12345'678");
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check (__LINE__, "\2\3\377", "1", "1");
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check (__LINE__, "\2\3\377", "12", "12");
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check (__LINE__, "\2\3\377", "123", "1'23");
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check (__LINE__, "\2\3\377", "1234", "12'34");
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check (__LINE__, "\2\3\377", "12345", "123'45");
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check (__LINE__, "\2\3\377", "123456", "1'234'56");
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check (__LINE__, "\2\3\377", "1234567", "12'345'67");
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check (__LINE__, "\2\3\377", "12345678", "123'456'78");
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check (__LINE__, "\2\3\377", "123456789", "1234'567'89");
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check (__LINE__, "\2\3\377", "1234567890", "12345'678'90");
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check (__LINE__, "\3\2\377", "1", "1");
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check (__LINE__, "\3\2\377", "12", "12");
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check (__LINE__, "\3\2\377", "123", "123");
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check (__LINE__, "\3\2\377", "1234", "1'234");
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check (__LINE__, "\3\2\377", "12345", "12'345");
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check (__LINE__, "\3\2\377", "123456", "1'23'456");
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check (__LINE__, "\3\2\377", "1234567", "12'34'567");
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check (__LINE__, "\3\2\377", "12345678", "123'45'678");
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check (__LINE__, "\3\2\377", "123456789", "1234'56'789");
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check (__LINE__, "\3\2\377", "1234567890", "12345'67'890");
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/* Locale-based tests. */
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locale_t loc;
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struct lc_ctype_data *ctype;
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struct grouping_iterator it;
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loc = newlocale (LC_ALL_MASK, "de_DE.UTF-8", 0);
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TEST_VERIFY_EXIT (loc != 0);
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ctype = loc->__locales[LC_CTYPE]->private;
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TEST_VERIFY (!ctype->outdigit_translation_needed);
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for (int i = 0; i <= 9; ++i)
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TEST_COMPARE (ctype->outdigit_bytes[i], 1);
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TEST_COMPARE (ctype->outdigit_bytes_all_equal, 1);
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TEST_COMPARE (__grouping_iterator_init (&it, LC_NUMERIC, loc, 8), true);
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TEST_COMPARE (it.remaining_in_current_group, 2);
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TEST_COMPARE (it.remaining, 8);
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TEST_COMPARE (*it.groupings, 3);
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TEST_COMPARE (it.non_repeating_groups, 3); /* Locale duplicates 3. */
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TEST_COMPARE (it.separators, 2);
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TEST_COMPARE (__grouping_iterator_init (&it, LC_MONETARY, loc, 8), true);
|
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TEST_COMPARE (it.remaining_in_current_group, 2);
|
||||
TEST_COMPARE (it.remaining, 8);
|
||||
TEST_COMPARE (*it.groupings, 3);
|
||||
TEST_COMPARE (it.non_repeating_groups, 3); /* Locale duplicates 3. */
|
||||
TEST_COMPARE (it.separators, 2);
|
||||
freelocale (loc);
|
||||
|
||||
loc = newlocale (LC_ALL_MASK, "tg_TJ.UTF-8", 0);
|
||||
TEST_VERIFY_EXIT (loc != 0);
|
||||
ctype = loc->__locales[LC_CTYPE]->private;
|
||||
TEST_VERIFY (!ctype->outdigit_translation_needed);
|
||||
for (int i = 0; i <= 9; ++i)
|
||||
TEST_COMPARE (ctype->outdigit_bytes[i], 1);
|
||||
TEST_COMPARE (ctype->outdigit_bytes_all_equal, 1);
|
||||
TEST_COMPARE (__grouping_iterator_init (&it, LC_NUMERIC, loc, 8), true);
|
||||
TEST_COMPARE (it.remaining_in_current_group, 2);
|
||||
TEST_COMPARE (it.remaining, 8);
|
||||
TEST_COMPARE (*it.groupings, 3);
|
||||
TEST_COMPARE (it.non_repeating_groups, 3); /* Locale duplicates 3. */
|
||||
TEST_COMPARE (it.separators, 2);
|
||||
TEST_COMPARE (__grouping_iterator_init (&it, LC_MONETARY, loc, 8), true);
|
||||
TEST_COMPARE (it.remaining_in_current_group, 2);
|
||||
TEST_COMPARE (it.remaining, 8);
|
||||
TEST_COMPARE (*it.groupings, 3);
|
||||
TEST_COMPARE (it.non_repeating_groups, 3); /* Locale duplicates 3. */
|
||||
TEST_COMPARE (it.separators, 2);
|
||||
freelocale (loc);
|
||||
|
||||
loc = newlocale (LC_ALL_MASK, "hi_IN.UTF-8", 0);
|
||||
TEST_VERIFY_EXIT (loc != 0);
|
||||
ctype = loc->__locales[LC_CTYPE]->private;
|
||||
TEST_VERIFY (ctype->outdigit_translation_needed);
|
||||
for (int i = 0; i <= 9; ++i)
|
||||
/* Locale uses Devanagari digits. */
|
||||
TEST_COMPARE (ctype->outdigit_bytes[i], 3);
|
||||
TEST_COMPARE (ctype->outdigit_bytes_all_equal, 3);
|
||||
TEST_COMPARE (__grouping_iterator_init (&it, LC_NUMERIC, loc, 8), true);
|
||||
TEST_COMPARE (it.remaining_in_current_group, 2);
|
||||
TEST_COMPARE (it.remaining, 8);
|
||||
TEST_COMPARE (*it.groupings, 3);
|
||||
TEST_COMPARE (it.non_repeating_groups, 0);
|
||||
TEST_COMPARE (it.separators, 2);
|
||||
TEST_COMPARE (__grouping_iterator_init (&it, LC_MONETARY, loc, 8), true);
|
||||
TEST_COMPARE (it.remaining_in_current_group, 1);
|
||||
TEST_COMPARE (it.remaining, 8);
|
||||
TEST_COMPARE (*it.groupings, 2);
|
||||
TEST_COMPARE (it.non_repeating_groups, 3);
|
||||
TEST_COMPARE (it.separators, 3);
|
||||
freelocale (loc);
|
||||
|
||||
loc = newlocale (LC_ALL_MASK, "ps_AF.UTF-8", 0);
|
||||
TEST_VERIFY_EXIT (loc != 0);
|
||||
ctype = loc->__locales[LC_CTYPE]->private;
|
||||
TEST_VERIFY (ctype->outdigit_translation_needed);
|
||||
for (int i = 0; i <= 9; ++i)
|
||||
/* Locale uses non-ASCII digits. */
|
||||
TEST_COMPARE (ctype->outdigit_bytes[i], 2);
|
||||
TEST_COMPARE (ctype->outdigit_bytes_all_equal, 2);
|
||||
TEST_COMPARE (__grouping_iterator_init (&it, LC_NUMERIC, loc, 8), true);
|
||||
TEST_COMPARE (it.remaining_in_current_group, 2);
|
||||
TEST_COMPARE (it.remaining, 8);
|
||||
TEST_COMPARE (*it.groupings, 3);
|
||||
TEST_COMPARE (it.non_repeating_groups, 0);
|
||||
TEST_COMPARE (it.separators, 2);
|
||||
TEST_COMPARE (__grouping_iterator_init (&it, LC_MONETARY, loc, 8), true);
|
||||
TEST_COMPARE (it.remaining_in_current_group, 2);
|
||||
TEST_COMPARE (it.remaining, 8);
|
||||
TEST_COMPARE (*it.groupings, 3);
|
||||
TEST_COMPARE (it.non_repeating_groups, 0);
|
||||
TEST_COMPARE (it.separators, 2);
|
||||
freelocale (loc);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#include <support/test-driver.c>
|
||||
Loading…
x
Reference in New Issue
Block a user