diff options
Diffstat (limited to 'stdlib/grouping.c')
| -rw-r--r-- | stdlib/grouping.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/stdlib/grouping.c b/stdlib/grouping.c deleted file mode 100644 index 63ef4c1644..0000000000 --- a/stdlib/grouping.c +++ /dev/null @@ -1,201 +0,0 @@ -/* Internal header for proving correct grouping in strings of numbers. - Copyright (C) 1995-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <limits.h> -#include <stddef.h> -#include <string.h> - -#ifndef MAX -#define MAX(a,b) ({ typeof(a) _a = (a); typeof(b) _b = (b); \ - _a > _b ? _a : _b; }) -#endif - -#ifdef USE_WIDE_CHAR -# include <wctype.h> -# define L_(Ch) L##Ch -# define UCHAR_TYPE wint_t -# define STRING_TYPE wchar_t -#else -# define L_(Ch) Ch -# define UCHAR_TYPE unsigned char -# define STRING_TYPE char -#endif - -#include "grouping.h" - -/* Find the maximum prefix of the string between BEGIN and END which - satisfies the grouping rules. It is assumed that at least one digit - follows BEGIN directly. */ - -const STRING_TYPE * -#ifdef USE_WIDE_CHAR -__correctly_grouped_prefixwc (const STRING_TYPE *begin, const STRING_TYPE *end, - wchar_t thousands, -#else -__correctly_grouped_prefixmb (const STRING_TYPE *begin, const STRING_TYPE *end, - const char *thousands, -#endif - const char *grouping) -{ -#ifndef USE_WIDE_CHAR - size_t thousands_len; - int cnt; -#endif - - if (grouping == NULL) - return end; - -#ifndef USE_WIDE_CHAR - thousands_len = strlen (thousands); -#endif - - while (end > begin) - { - const STRING_TYPE *cp = end - 1; - const char *gp = grouping; - - /* Check first group. */ - while (cp >= begin) - { -#ifdef USE_WIDE_CHAR - if (*cp == thousands) - break; -#else - if (cp[thousands_len - 1] == *thousands) - { - for (cnt = 1; thousands[cnt] != '\0'; ++cnt) - if (thousands[cnt] != cp[thousands_len - 1 - cnt]) - break; - if (thousands[cnt] == '\0') - break; - } -#endif - --cp; - } - - /* We allow the representation to contain no grouping at all even if - the locale specifies we can have grouping. */ - if (cp < begin) - return end; - - if (end - cp == (int) *gp + 1) - { - /* This group matches the specification. */ - - const STRING_TYPE *new_end; - - if (cp < begin) - /* There is just one complete group. We are done. */ - return end; - - /* CP points to a thousands separator character. The preceding - remainder of the string from BEGIN to NEW_END is the part we - will consider if there is a grouping error in this trailing - portion from CP to END. */ - new_end = cp - 1; - - /* Loop while the grouping is correct. */ - while (1) - { - /* Get the next grouping rule. */ - ++gp; - if (*gp == 0) - /* If end is reached use last rule. */ - --gp; - - /* Skip the thousands separator. */ - --cp; - - if (*gp == CHAR_MAX -#if CHAR_MIN < 0 - || *gp < 0 -#endif - ) - { - /* No more thousands separators are allowed to follow. */ - while (cp >= begin) - { -#ifdef USE_WIDE_CHAR - if (*cp == thousands) - break; -#else - for (cnt = 0; thousands[cnt] != '\0'; ++cnt) - if (thousands[cnt] != cp[thousands_len - cnt - 1]) - break; - if (thousands[cnt] == '\0') - break; -#endif - --cp; - } - - if (cp < begin) - /* OK, only digits followed. */ - return end; - } - else - { - /* Check the next group. */ - const STRING_TYPE *group_end = cp; - - while (cp >= begin) - { -#ifdef USE_WIDE_CHAR - if (*cp == thousands) - break; -#else - for (cnt = 0; thousands[cnt] != '\0'; ++cnt) - if (thousands[cnt] != cp[thousands_len - cnt - 1]) - break; - if (thousands[cnt] == '\0') - break; -#endif - --cp; - } - - if (cp < begin && group_end - cp <= (int) *gp) - /* Final group is correct. */ - return end; - - if (cp < begin || group_end - cp != (int) *gp) - /* Incorrect group. Punt. */ - break; - } - } - - /* The trailing portion of the string starting at NEW_END - contains a grouping error. So we will look for a correctly - grouped number in the preceding portion instead. */ - end = new_end; - } - else - { - /* Even the first group was wrong; determine maximum shift. */ - if (end - cp > (int) *gp + 1) - end = cp + (int) *gp + 1; - else if (cp < begin) - /* This number does not fill the first group, but is correct. */ - return end; - else - /* CP points to a thousands separator character. */ - end = cp; - } - } - - return MAX (begin, end); -} |