2011-11-29 10:52:22 +01:00
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/* Copyright (C) 1995-1997,2002,2004,2007,2010,2011 Free Software Foundation, Inc.
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1997-02-15 05:31:36 +01:00
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This file is part of the GNU C Library.
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2002-08-06 10:40:20 +02:00
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Written by Ulrich Drepper <drepper@gnu.org>, 1995.
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1997-02-15 05:31:36 +01:00
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The GNU C Library is free software; you can redistribute it and/or
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2001-07-06 06:58:11 +02:00
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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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1997-02-15 05:31:36 +01:00
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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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2001-07-06 06:58:11 +02:00
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Lesser General Public License for more details.
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1997-02-15 05:31:36 +01:00
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2001-07-06 06:58:11 +02:00
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You should have received a copy of the GNU Lesser General Public
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2012-02-10 00:18:22 +01:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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1997-02-15 05:31:36 +01:00
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2002-08-06 10:40:20 +02:00
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2004-03-14 22:12:06 +01:00
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#include <assert.h>
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#include <langinfo.h>
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#include <locale.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef STRING_TYPE
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# define STRING_TYPE char
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# define USTRING_TYPE unsigned char
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# define STRCOLL __strcoll_l
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# define STRCMP strcmp
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# define STRLEN strlen
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# define WEIGHT_H "../locale/weight.h"
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# define SUFFIX MB
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# define L(arg) arg
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#endif
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#define CONCAT(a,b) CONCAT1(a,b)
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#define CONCAT1(a,b) a##b
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#include "../locale/localeinfo.h"
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int
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STRCOLL (s1, s2, l)
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const STRING_TYPE *s1;
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const STRING_TYPE *s2;
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__locale_t l;
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{
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2010-01-09 19:56:41 +01:00
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struct __locale_data *current = l->__locales[LC_COLLATE];
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2004-03-14 22:12:06 +01:00
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uint_fast32_t nrules = current->values[_NL_ITEM_INDEX (_NL_COLLATE_NRULES)].word;
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/* We don't assign the following values right away since it might be
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unnecessary in case there are no rules. */
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const unsigned char *rulesets;
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const int32_t *table;
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const USTRING_TYPE *weights;
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const USTRING_TYPE *extra;
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const int32_t *indirect;
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uint_fast32_t pass;
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int result = 0;
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const USTRING_TYPE *us1;
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const USTRING_TYPE *us2;
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size_t s1len;
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size_t s2len;
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int32_t *idx1arr;
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int32_t *idx2arr;
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unsigned char *rule1arr;
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unsigned char *rule2arr;
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size_t idx1max;
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size_t idx2max;
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size_t idx1cnt;
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size_t idx2cnt;
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size_t idx1now;
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size_t idx2now;
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size_t backw1_stop;
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size_t backw2_stop;
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size_t backw1;
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size_t backw2;
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int val1;
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int val2;
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int position;
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int seq1len;
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int seq2len;
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int use_malloc;
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#include WEIGHT_H
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if (nrules == 0)
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return STRCMP (s1, s2);
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rulesets = (const unsigned char *)
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current->values[_NL_ITEM_INDEX (_NL_COLLATE_RULESETS)].string;
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table = (const int32_t *)
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current->values[_NL_ITEM_INDEX (CONCAT(_NL_COLLATE_TABLE,SUFFIX))].string;
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weights = (const USTRING_TYPE *)
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current->values[_NL_ITEM_INDEX (CONCAT(_NL_COLLATE_WEIGHT,SUFFIX))].string;
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extra = (const USTRING_TYPE *)
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current->values[_NL_ITEM_INDEX (CONCAT(_NL_COLLATE_EXTRA,SUFFIX))].string;
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indirect = (const int32_t *)
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current->values[_NL_ITEM_INDEX (CONCAT(_NL_COLLATE_INDIRECT,SUFFIX))].string;
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use_malloc = 0;
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assert (((uintptr_t) table) % __alignof__ (table[0]) == 0);
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assert (((uintptr_t) weights) % __alignof__ (weights[0]) == 0);
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assert (((uintptr_t) extra) % __alignof__ (extra[0]) == 0);
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assert (((uintptr_t) indirect) % __alignof__ (indirect[0]) == 0);
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/* We need this a few times. */
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s1len = STRLEN (s1);
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s2len = STRLEN (s2);
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/* Catch empty strings. */
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if (__builtin_expect (s1len == 0, 0) || __builtin_expect (s2len == 0, 0))
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return (s1len != 0) - (s2len != 0);
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/* We need the elements of the strings as unsigned values since they
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are used as indeces. */
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us1 = (const USTRING_TYPE *) s1;
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us2 = (const USTRING_TYPE *) s2;
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/* Perform the first pass over the string and while doing this find
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and store the weights for each character. Since we want this to
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be as fast as possible we are using `alloca' to store the temporary
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values. But since there is no limit on the length of the string
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we have to use `malloc' if the string is too long. We should be
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very conservative here.
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Please note that the localedef programs makes sure that `position'
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is not used at the first level. */
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2007-10-02 19:17:59 +02:00
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if (! __libc_use_alloca ((s1len + s2len) * (sizeof (int32_t) + 1)))
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2004-03-14 22:12:06 +01:00
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{
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idx1arr = (int32_t *) malloc ((s1len + s2len) * (sizeof (int32_t) + 1));
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idx2arr = &idx1arr[s1len];
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rule1arr = (unsigned char *) &idx2arr[s2len];
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rule2arr = &rule1arr[s1len];
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if (idx1arr == NULL)
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/* No memory. Well, go with the stack then.
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XXX Once this implementation is stable we will handle this
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differently. Instead of precomputing the indeces we will
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do this in time. This means, though, that this happens for
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every pass again. */
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goto try_stack;
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use_malloc = 1;
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}
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else
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{
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try_stack:
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idx1arr = (int32_t *) alloca (s1len * sizeof (int32_t));
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idx2arr = (int32_t *) alloca (s2len * sizeof (int32_t));
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rule1arr = (unsigned char *) alloca (s1len);
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rule2arr = (unsigned char *) alloca (s2len);
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}
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idx1cnt = 0;
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idx2cnt = 0;
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idx1max = 0;
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idx2max = 0;
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idx1now = 0;
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idx2now = 0;
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backw1_stop = ~0ul;
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backw2_stop = ~0ul;
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backw1 = ~0ul;
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backw2 = ~0ul;
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seq1len = 0;
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seq2len = 0;
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position = rulesets[0] & sort_position;
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while (1)
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{
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val1 = 0;
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val2 = 0;
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/* Get the next non-IGNOREd element for string `s1'. */
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if (seq1len == 0)
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do
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{
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++val1;
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if (backw1_stop != ~0ul)
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{
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/* The is something pushed. */
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if (backw1 == backw1_stop)
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{
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/* The last pushed character was handled. Continue
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with forward characters. */
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if (idx1cnt < idx1max)
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2007-10-02 19:17:59 +02:00
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{
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idx1now = idx1cnt;
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backw1_stop = ~0ul;
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}
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2004-03-14 22:12:06 +01:00
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else
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/* Nothing anymore. The backward sequence ended with
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the last sequence in the string. Note that seq1len
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is still zero. */
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break;
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}
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else
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idx1now = --backw1;
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}
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else
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{
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backw1_stop = idx1max;
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while (*us1 != L('\0'))
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{
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2011-11-29 10:52:22 +01:00
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int32_t tmp = findidx (&us1, -1);
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2004-03-14 22:12:06 +01:00
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rule1arr[idx1max] = tmp >> 24;
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idx1arr[idx1max] = tmp & 0xffffff;
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idx1cnt = idx1max++;
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if ((rulesets[rule1arr[idx1cnt] * nrules]
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& sort_backward) == 0)
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/* No more backward characters to push. */
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break;
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++idx1cnt;
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}
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if (backw1_stop >= idx1cnt)
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{
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/* No sequence at all or just one. */
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if (idx1cnt == idx1max || backw1_stop > idx1cnt)
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/* Note that seq1len is still zero. */
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break;
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backw1_stop = ~0ul;
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idx1now = idx1cnt;
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}
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else
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/* We pushed backward sequences. */
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idx1now = backw1 = idx1cnt - 1;
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}
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}
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while ((seq1len = weights[idx1arr[idx1now]++]) == 0);
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/* And the same for string `s2'. */
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if (seq2len == 0)
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do
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{
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++val2;
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if (backw2_stop != ~0ul)
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{
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/* The is something pushed. */
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if (backw2 == backw2_stop)
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{
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/* The last pushed character was handled. Continue
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with forward characters. */
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if (idx2cnt < idx2max)
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2007-10-02 19:17:59 +02:00
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{
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idx2now = idx2cnt;
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backw2_stop = ~0ul;
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}
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2004-03-14 22:12:06 +01:00
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else
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/* Nothing anymore. The backward sequence ended with
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the last sequence in the string. Note that seq2len
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is still zero. */
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break;
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}
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else
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idx2now = --backw2;
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}
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else
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{
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backw2_stop = idx2max;
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while (*us2 != L('\0'))
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{
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2011-11-29 10:52:22 +01:00
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int32_t tmp = findidx (&us2, -1);
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2004-03-14 22:12:06 +01:00
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rule2arr[idx2max] = tmp >> 24;
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idx2arr[idx2max] = tmp & 0xffffff;
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idx2cnt = idx2max++;
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if ((rulesets[rule2arr[idx2cnt] * nrules]
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& sort_backward) == 0)
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/* No more backward characters to push. */
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break;
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++idx2cnt;
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}
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if (backw2_stop >= idx2cnt)
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{
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/* No sequence at all or just one. */
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if (idx2cnt == idx2max || backw2_stop > idx2cnt)
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/* Note that seq1len is still zero. */
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break;
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backw2_stop = ~0ul;
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idx2now = idx2cnt;
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}
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else
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/* We pushed backward sequences. */
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idx2now = backw2 = idx2cnt - 1;
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}
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}
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while ((seq2len = weights[idx2arr[idx2now]++]) == 0);
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/* See whether any or both strings are empty. */
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if (seq1len == 0 || seq2len == 0)
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{
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if (seq1len == seq2len)
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/* Both ended. So far so good, both strings are equal at the
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first level. */
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break;
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/* This means one string is shorter than the other. Find out
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which one and return an appropriate value. */
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result = seq1len == 0 ? -1 : 1;
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goto free_and_return;
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}
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/* Test for position if necessary. */
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if (position && val1 != val2)
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{
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result = val1 - val2;
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goto free_and_return;
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}
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/* Compare the two sequences. */
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do
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{
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if (weights[idx1arr[idx1now]] != weights[idx2arr[idx2now]])
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{
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/* The sequences differ. */
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result = weights[idx1arr[idx1now]] - weights[idx2arr[idx2now]];
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goto free_and_return;
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}
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/* Increment the offsets. */
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++idx1arr[idx1now];
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++idx2arr[idx2now];
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--seq1len;
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--seq2len;
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}
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while (seq1len > 0 && seq2len > 0);
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if (position && seq1len != seq2len)
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{
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result = seq1len - seq2len;
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goto free_and_return;
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}
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}
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/* Now the remaining passes over the weights. We now use the
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indeces we found before. */
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for (pass = 1; pass < nrules; ++pass)
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{
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/* We assume that if a rule has defined `position' in one section
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this is true for all of them. */
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idx1cnt = 0;
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idx2cnt = 0;
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backw1_stop = ~0ul;
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backw2_stop = ~0ul;
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backw1 = ~0ul;
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backw2 = ~0ul;
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position = rulesets[rule1arr[0] * nrules + pass] & sort_position;
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while (1)
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{
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val1 = 0;
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val2 = 0;
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|
|
|
/* Get the next non-IGNOREd element for string `s1'. */
|
|
|
|
if (seq1len == 0)
|
|
|
|
do
|
|
|
|
{
|
|
|
|
++val1;
|
|
|
|
|
|
|
|
if (backw1_stop != ~0ul)
|
|
|
|
{
|
|
|
|
/* The is something pushed. */
|
|
|
|
if (backw1 == backw1_stop)
|
|
|
|
{
|
|
|
|
/* The last pushed character was handled. Continue
|
|
|
|
with forward characters. */
|
|
|
|
if (idx1cnt < idx1max)
|
2007-10-02 19:17:59 +02:00
|
|
|
{
|
|
|
|
idx1now = idx1cnt;
|
|
|
|
backw1_stop = ~0ul;
|
|
|
|
}
|
2004-03-14 22:12:06 +01:00
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Nothing anymore. The backward sequence
|
|
|
|
ended with the last sequence in the string. */
|
|
|
|
idx1now = ~0ul;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
idx1now = --backw1;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
backw1_stop = idx1cnt;
|
|
|
|
|
|
|
|
while (idx1cnt < idx1max)
|
|
|
|
{
|
|
|
|
if ((rulesets[rule1arr[idx1cnt] * nrules + pass]
|
|
|
|
& sort_backward) == 0)
|
|
|
|
/* No more backward characters to push. */
|
|
|
|
break;
|
|
|
|
++idx1cnt;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (backw1_stop == idx1cnt)
|
|
|
|
{
|
|
|
|
/* No sequence at all or just one. */
|
|
|
|
if (idx1cnt == idx1max)
|
|
|
|
/* Note that seq1len is still zero. */
|
|
|
|
break;
|
|
|
|
|
|
|
|
backw1_stop = ~0ul;
|
|
|
|
idx1now = idx1cnt++;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
/* We pushed backward sequences. */
|
|
|
|
idx1now = backw1 = idx1cnt - 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while ((seq1len = weights[idx1arr[idx1now]++]) == 0);
|
|
|
|
|
|
|
|
/* And the same for string `s2'. */
|
|
|
|
if (seq2len == 0)
|
|
|
|
do
|
|
|
|
{
|
|
|
|
++val2;
|
|
|
|
|
|
|
|
if (backw2_stop != ~0ul)
|
|
|
|
{
|
|
|
|
/* The is something pushed. */
|
|
|
|
if (backw2 == backw2_stop)
|
|
|
|
{
|
|
|
|
/* The last pushed character was handled. Continue
|
|
|
|
with forward characters. */
|
|
|
|
if (idx2cnt < idx2max)
|
2007-10-02 19:17:59 +02:00
|
|
|
{
|
|
|
|
idx2now = idx2cnt;
|
|
|
|
backw2_stop = ~0ul;
|
|
|
|
}
|
2004-03-14 22:12:06 +01:00
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Nothing anymore. The backward sequence
|
|
|
|
ended with the last sequence in the string. */
|
|
|
|
idx2now = ~0ul;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
idx2now = --backw2;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
backw2_stop = idx2cnt;
|
|
|
|
|
|
|
|
while (idx2cnt < idx2max)
|
|
|
|
{
|
|
|
|
if ((rulesets[rule2arr[idx2cnt] * nrules + pass]
|
|
|
|
& sort_backward) == 0)
|
|
|
|
/* No more backward characters to push. */
|
|
|
|
break;
|
|
|
|
++idx2cnt;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (backw2_stop == idx2cnt)
|
|
|
|
{
|
|
|
|
/* No sequence at all or just one. */
|
|
|
|
if (idx2cnt == idx2max)
|
|
|
|
/* Note that seq2len is still zero. */
|
|
|
|
break;
|
|
|
|
|
|
|
|
backw2_stop = ~0ul;
|
|
|
|
idx2now = idx2cnt++;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
/* We pushed backward sequences. */
|
|
|
|
idx2now = backw2 = idx2cnt - 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while ((seq2len = weights[idx2arr[idx2now]++]) == 0);
|
|
|
|
|
|
|
|
/* See whether any or both strings are empty. */
|
|
|
|
if (seq1len == 0 || seq2len == 0)
|
|
|
|
{
|
|
|
|
if (seq1len == seq2len)
|
|
|
|
/* Both ended. So far so good, both strings are equal
|
|
|
|
at this level. */
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* This means one string is shorter than the other. Find out
|
|
|
|
which one and return an appropriate value. */
|
|
|
|
result = seq1len == 0 ? -1 : 1;
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Test for position if necessary. */
|
|
|
|
if (position && val1 != val2)
|
|
|
|
{
|
|
|
|
result = val1 - val2;
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Compare the two sequences. */
|
|
|
|
do
|
|
|
|
{
|
|
|
|
if (weights[idx1arr[idx1now]] != weights[idx2arr[idx2now]])
|
|
|
|
{
|
|
|
|
/* The sequences differ. */
|
|
|
|
result = (weights[idx1arr[idx1now]]
|
|
|
|
- weights[idx2arr[idx2now]]);
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Increment the offsets. */
|
|
|
|
++idx1arr[idx1now];
|
|
|
|
++idx2arr[idx2now];
|
|
|
|
|
|
|
|
--seq1len;
|
|
|
|
--seq2len;
|
|
|
|
}
|
|
|
|
while (seq1len > 0 && seq2len > 0);
|
|
|
|
|
|
|
|
if (position && seq1len != seq2len)
|
|
|
|
{
|
|
|
|
result = seq1len - seq2len;
|
|
|
|
goto free_and_return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Free the memory if needed. */
|
|
|
|
free_and_return:
|
|
|
|
if (use_malloc)
|
|
|
|
free (idx1arr);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
libc_hidden_def (STRCOLL)
|
|
|
|
|
|
|
|
#ifndef WIDE_CHAR_VERSION
|
2002-08-06 10:40:20 +02:00
|
|
|
weak_alias (__strcoll_l, strcoll_l)
|
2004-03-14 22:12:06 +01:00
|
|
|
#endif
|