/* Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
+ Written by Ulrich Drepper <drepper@cygnus.com>, 1995.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-#include <endian.h>
+#include <langinfo.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
-#ifndef STRING_TYPE
-# define STRING_TYPE char
-# define USTRING_TYPE unsigned char
-# ifdef USE_IN_EXTENDED_LOCALE_MODEL
-# define STRCOLL __strcoll_l
-# else
-# define STRCOLL strcoll
-# endif
-# define STRCMP strcmp
+#include "../locale/localeinfo.h"
+
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# define STRCOLL __strcoll_l
+#else
+# define STRCOLL strcoll
#endif
#ifndef USE_IN_EXTENDED_LOCALE_MODEL
int
STRCOLL (s1, s2)
- const STRING_TYPE *s1;
- const STRING_TYPE *s2;
+ const char *s1;
+ const char *s2;
#else
int
STRCOLL (s1, s2, l)
- const STRING_TYPE *s1;
- const STRING_TYPE *s2;
+ const char *s1;
+ const char *s2;
__locale_t l;
#endif
{
- return STRCMP (s1, s2);
-}
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+ struct locale_data *current = l->__locales[LC_COLLATE];
+ uint_fast32_t nrules = *((uint32_t *) current->values[_NL_ITEM_INDEX (_NL_COLLATE_NRULES)].string);
+#else
+ uint32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+#endif
+ /* We don't assign the following values right away since it might be
+ unnecessary in case there are no rules. */
+ const unsigned char *rulesets;
+ const int32_t *table;
+ const unsigned char *weights;
+ const unsigned char *extra;
+ const int32_t *indirect;
+ uint_fast32_t pass;
+ int result = 0;
+ const unsigned char *us1;
+ const unsigned char *us2;
+ size_t s1len;
+ size_t s2len;
+ int32_t *idx1arr;
+ int32_t *idx2arr;
+ unsigned char *rule1arr;
+ unsigned char *rule2arr;
+ size_t idx1max;
+ size_t idx2max;
+ size_t idx1cnt;
+ size_t idx2cnt;
+ size_t backw1_stop;
+ size_t backw2_stop;
+ size_t backw1;
+ size_t backw2;
+ int val1;
+ int val2;
+ int position;
+ int use_malloc = 0;
-#if 0
-/* Include the shared helper functions. `strxfrm'/`wcsxfrm' also use
- these functions. */
#include "../locale/weight.h"
+ if (nrules == 0)
+ return strcmp (s1, s2);
-/* Compare S1 and S2, returning less than, equal to or
- greater than zero if the collated form of S1 is lexicographically
- less than, equal to or greater than the collated form of S2. */
-#ifndef USE_IN_EXTENDED_LOCALE_MODEL
-int
-STRCOLL (s1, s2)
- const STRING_TYPE *s1;
- const STRING_TYPE *s2;
-#else
-int
-STRCOLL (s1, s2, l)
- const STRING_TYPE *s1;
- const STRING_TYPE *s2;
- __locale_t l;
-#endif
-{
#ifdef USE_IN_EXTENDED_LOCALE_MODEL
- struct locale_data *current = l->__locales[LC_COLLATE];
-# if BYTE_ORDER == BIG_ENDIAN
- const uint32_t *collate_table = (const uint32_t *)
- current->values[_NL_ITEM_INDEX (_NL_COLLATE_TABLE_EB)].string;
- const uint32_t *collate_extra = (const uint32_t *)
- current->values[_NL_ITEM_INDEX (_NL_COLLATE_EXTRA_EB)].string;
-# elif BYTE_ORDER == LITTLE_ENDIAN
- const uint32_t *collate_table = (const uint32_t *)
- current->values[_NL_ITEM_INDEX (_NL_COLLATE_TABLE_EL)].string;
- const uint32_t *collate_extra = (const uint32_t *)
- current->values[_NL_ITEM_INDEX (_NL_COLLATE_EXTRA_EL)].string;
-# else
-# error bizarre byte order
-# endif
+ rulesets = (const unsigned char *)
+ current->values[_NL_ITEM_INDEX (_NL_COLLATE_RULESETS)].string;
+ table = (const int32_t *)
+ current->values[_NL_ITEM_INDEX (_NL_COLLATE_TABLEMB)].string;
+ weights = (const unsigned char *)
+ current->values[_NL_ITEM_INDEX (_NL_COLLATE_WEIGHTMB)].string;
+ extra = (const unsigned char *)
+ current->values[_NL_ITEM_INDEX (_NL_COLLATE_EXTRAMB)].string;
+ indirect = (const int32_t *)
+ current->values[_NL_ITEM_INDEX (_NL_COLLATE_INDIRECTMB)].string;
+#else
+ rulesets = (const unsigned char *)
+ _NL_CURRENT (LC_COLLATE, _NL_COLLATE_RULESETS);
+ table = (const int32_t *)
+ _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
+ weights = (const unsigned char *)
+ _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTMB);
+ extra = (const unsigned char *)
+ _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
+ indirect = (const int32_t *)
+ _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTMB);
#endif
- weight_t *s1forw = NULL;
- weight_t *s1backw = NULL;
- weight_t *s2forw = NULL;
- weight_t *s2backw = NULL;
- size_t pass;
-
- /* If the current locale does not specify locale data we use normal
- 8-bit string comparison. */
- if (collate_nrules == 0)
- return STRCMP (s1, s2);
-
- /* Handle empty strings as a special case. */
- if (*s1 == '\0')
- return *s2 == '\0' ? 0 : -1;
- else if (*s2 == '\0')
- return 1;
-
- /* Get full information about the strings. This means we get
- information for all passes in a special data structure. */
- get_string (s1, s1forw, s1backw);
- get_string (s2, s2forw, s2backw);
-
- /* Now we have all the information. In at most the given number of
- passes we can finally decide about the order. */
- for (pass = 0; pass < collate_nrules; ++pass)
+
+ /* We need this a few times. */
+ s1len = strlen (s1);
+ s2len = strlen (s2);
+
+ /* We need the elements of the strings as unsigned values since they
+ are used as indeces. */
+ us1 = (const unsigned char *) s1;
+ us2 = (const unsigned char *) s2;
+
+ /* Perform the first pass over the string and while doing this find
+ and store the weights for each character. Since we want this to
+ be as fast as possible we are using `alloca' to store the temporary
+ values. But since there is no limit on the length of the string
+ we have to use `malloc' if the string is too long. We should be
+ very conservative here.
+
+ Please note that the localedef programs makes sure that `position'
+ is not used at the first level. */
+ if (s1len + s2len >= 16384)
{
- int forward = (collate_rules[pass] & sort_forward) != 0;
- const weight_t *s1run = forward ? s1forw : s1backw;
- const weight_t *s2run = forward ? s2forw : s2backw;
- int s1idx = forward ? 0 : s1run->data[pass].number - 1;
- int s2idx = forward ? 0 : s2run->data[pass].number - 1;
+ idx1arr = (int32_t *) malloc ((s1len + s2len) * (sizeof (int32_t) + 1));
+ idx2arr = &idx1arr[s2len];
+ rule1arr = (unsigned char *) &idx2arr[s2len];
+ rule2arr = &rule1arr[s1len];
- while (1)
+ if (idx1arr == NULL)
+ /* No memory. Well, go with the stack then.
+
+ XXX Once this implementation is stable we will handle this
+ differently. Instead of precomputing the indeces we will
+ do this in time. This means, though, that this happens for
+ every pass again. */
+ goto try_stack;
+ use_malloc = 1;
+ }
+ else
+ {
+ try_stack:
+ idx1arr = (int32_t *) alloca (s1len * sizeof (int32_t));
+ idx2arr = (int32_t *) alloca (s2len * sizeof (int32_t));
+ rule1arr = (unsigned char *) alloca (s2len);
+ rule2arr = (unsigned char *) alloca (s2len);
+ }
+
+ idx1cnt = 0;
+ idx2cnt = 0;
+ idx1max = 0;
+ idx2max = 0;
+ backw1_stop = ~0ul;
+ backw2_stop = ~0ul;
+ backw1 = ~0ul;
+ backw2 = ~0ul;
+ position = rulesets[rule1arr[0] * nrules] & sort_position;
+ while (1)
+ {
+ size_t idx1now;
+ size_t idx2now;
+ int seq1len;
+ int seq2len;
+ int i;
+
+ val1 = 0;
+ val2 = 0;
+
+ /* Get the next non-IGNOREd element for string `s1'. */
+ do
{
- int s1ignore = 0;
- int s2ignore = 0;
- uint32_t w1 = 0;
- uint32_t w2 = 0;
-
- /* Here we have to check for IGNORE entries. If these are
- found we count them and go on with the next value. */
- while (s1run != NULL
- && ((w1 = s1run->data[pass].value[s1idx])
- == (uint32_t) IGNORE_CHAR))
+ ++val1;
+
+ if (backw1_stop != ~0ul)
{
- ++s1ignore;
- if (forward
- ? ++s1idx >= s1run->data[pass].number
- : --s1idx < 0)
+ /* The is something pushed. */
+ if (backw1 == backw1_stop)
{
- weight_t *nextp = forward ? s1run->next : s1run->prev;
- if (nextp == NULL)
+ /* The last pushed character was handled. Continue
+ with forward characters. */
+ if (idx1cnt < idx1max)
+ idx1now = idx1cnt;
+ else
{
- w1 = 0;
- /* No more non-INGOREd elements means lowest
- possible value. */
- s1ignore = -1;
+ /* Nothing anymore. The backward sequence ended with
+ the last sequence in the string. */
+ idx1now = ~0ul;
+ break;
}
- else
- s1idx = forward ? 0 : nextp->data[pass].number - 1;
- s1run = nextp;
}
+ else
+ idx1now = --backw1;
}
-
- while (s2run != NULL
- && ((w2 = s2run->data[pass].value[s2idx])
- == (uint32_t) IGNORE_CHAR))
+ else
{
- ++s2ignore;
- if (forward
- ? ++s2idx >= s2run->data[pass].number
- : --s2idx < 0)
+ backw1_stop = idx1max;
+
+ while (*us1 != '\0')
{
- weight_t *nextp = forward ? s2run->next : s2run->prev;
- if (nextp == NULL)
+ int32_t tmp = findidx (&us1);
+ rule1arr[idx1max] = tmp >> 24;
+ idx1arr[idx1max] = tmp & 0xffffff;
+ idx1cnt = idx1max++;
+
+ if ((rulesets[rule1arr[idx1cnt] * nrules]
+ & sort_backward) == 0)
+ /* No more backward characters to push. */
+ break;
+ ++idx1cnt;
+ }
+
+ if (backw1_stop >= idx1cnt)
+ {
+ /* No sequence at all or just one. */
+ backw1_stop = ~0ul;
+ if (idx1cnt == idx1max || backw1_stop > idx1cnt)
{
- w2 = 0;
- /* No more non-INGOREd elements means lowest
- possible value. */
- s2ignore = -1;
+ idx1now = ~0ul;
+ break;
}
+ idx1now = idx1cnt;
+ }
+ else
+ /* We pushed backward sequences. */
+ idx1now = backw1 = idx1cnt - 1;
+ }
+ }
+ while (weights[idx1arr[idx1now]] == '\0');
+
+ /* And the same for string `s2'. */
+ 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)
+ idx2now = idx2cnt;
else
- s2idx = forward ? 0 : nextp->data[pass].number - 1;
- s2run = nextp;
+ {
+ /* Nothing anymore. The backward sequence ended with
+ the last sequence in the string. */
+ idx2now = ~0ul;
+ break;
+ }
+ }
+ else
+ idx2now = --backw2;
+ }
+ else
+ {
+ backw2_stop = idx2max;
+
+ while (*us2 != '\0')
+ {
+ int32_t tmp = findidx (&us2);
+ rule2arr[idx2max] = tmp >> 24;
+ idx2arr[idx2max] = tmp & 0xffffff;
+ idx2cnt = idx2max++;
+
+ if ((rulesets[rule2arr[idx2cnt] * nrules]
+ & sort_backward) == 0)
+ /* No more backward characters to push. */
+ break;
+ ++idx2cnt;
+ }
+
+ if (backw2_stop >= idx2cnt)
+ {
+ /* No sequence at all or just one. */
+ backw2_stop = ~0ul;
+ if (idx2cnt == idx2max || backw2_stop > idx2cnt)
+ {
+ idx2now = ~0ul;
+ break;
+ }
+ idx2now = idx2cnt;
}
+ else
+ /* We pushed backward sequences. */
+ idx2now = backw2 = idx2cnt - 1;
}
+ }
+ while (weights[idx2arr[idx2now]] == '\0');
- /* If one string is completely processed stop. */
- if (s1run == NULL || s2run == NULL)
+ /* See whether any or both strings are empty. */
+ if (idx1now == ~0ul || idx2now == ~0ul)
+ {
+ if (idx1now == idx2now)
+ /* Both ended. So far so good, both strings are equal at the
+ first level. */
break;
- /* Now we have information of the number of ignored
- weights and the value of the next weight. */
- if ((collate_rules[pass] & sort_position) != 0
- && s1ignore != s2ignore && (w1 != 0 || w2 != 0))
- return s1ignore < s2ignore ? -1 : 1;
+ /* This means one string is shorter than the other. Find out
+ which one and return an appropriate value. */
+ result = idx1now == ~0ul ? -1 : 1;
+ goto free_and_return;
+ }
- if (w1 != w2)
- return w1 < w2 ? -1 : 1;
+ /* Test for position if necessary. */
+ if (position && val1 != val2)
+ {
+ result = val1 - val2;
+ goto free_and_return;
+ }
+
+ /* Compare the two sequences. */
+ seq1len = weights[idx1arr[idx1now]++];
+ seq2len = weights[idx2arr[idx2now]++];
+ for (i = 0; i < seq1len && i < seq2len; ++i)
+ if (weights[idx1arr[idx1now]] != weights[idx2arr[idx2now]])
+ {
+ /* The sequences differ. */
+ result = weights[idx1arr[idx1now]] - weights[idx2arr[idx2now]];
+ goto free_and_return;
+ }
+ else
+ {
+ /* Increment the offsets. */
+ ++idx1arr[idx1now];
+ ++idx2arr[idx2now];
+ }
+
+ result = seq1len - seq2len;
+ if (result != 0)
+ goto free_and_return;
+ }
- /* We have to increment the index counters. */
- if (forward)
+ /* Now the remaining passes over the weights. We now use the
+ indeces we found before. */
+ for (pass = 1; pass < nrules; ++pass)
+ {
+ /* We assume that if a rule has defined `position' in one section
+ this is true for all of them. */
+ idx1cnt = 0;
+ idx2cnt = 0;
+ backw1_stop = ~0ul;
+ backw2_stop = ~0ul;
+ backw1 = ~0ul;
+ backw2 = ~0ul;
+ position = rulesets[rule1arr[0] * nrules + pass] & sort_position;
+
+ while (1)
+ {
+ size_t idx1now;
+ size_t idx2now;
+ int seq1len;
+ int seq2len;
+ int i;
+
+ val1 = 0;
+ val2 = 0;
+
+ /* Get the next non-IGNOREd element for string `s1'. */
+ do
{
- if (++s1idx >= s1run->data[pass].number)
+ ++val1;
+
+ if (backw1_stop != ~0ul)
{
- s1run = s1run->next;
- s1idx = 0;
+ /* The is something pushed. */
+ if (backw1 == backw1_stop)
+ {
+ /* The last pushed character was handled. Continue
+ with forward characters. */
+ if (idx1cnt < idx1max)
+ idx1now = idx1cnt;
+ else
+ {
+ /* Nothing anymore. The backward sequence ended with
+ the last sequence in the string. */
+ idx1now = ~0ul;
+ break;
+ }
+ }
+ else
+ idx1now = --backw1;
}
- if (++s2idx >= s2run->data[pass].number)
+ else
{
- s2run = s2run->next;
- s2idx = 0;
+ 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. */
+ backw1_stop = ~0ul;
+ if (idx1cnt == idx1max)
+ {
+ idx1now = ~0ul;
+ break;
+ }
+ idx1now = idx1cnt++;
+ }
+ else
+ /* We pushed backward sequences. */
+ idx1now = backw1 = idx1cnt - 1;
}
}
- else
+ while (weights[idx1arr[idx1now]] == '\0');
+
+ /* And the same for string `s2'. */
+ do
{
- if (--s1idx < 0)
+ ++val2;
+
+ if (backw2_stop != ~0ul)
{
- s1run = s1run->prev;
- if (s1run != NULL)
- s1idx = s1run->data[pass].number - 1;
+ /* The is something pushed. */
+ if (backw2 == backw2_stop)
+ {
+ /* The last pushed character was handled. Continue
+ with forward characters. */
+ if (idx2cnt < idx2max)
+ idx2now = idx2cnt;
+ else
+ {
+ /* Nothing anymore. The backward sequence ended with
+ the last sequence in the string. */
+ idx2now = ~0ul;
+ break;
+ }
+ }
+ else
+ idx2now = --backw2;
}
- if (--s2idx < 0)
+ else
{
- s2run = s2run->prev;
- if (s2run != NULL)
- s2idx = s2run->data[pass].number - 1;
+ 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. */
+ backw2_stop = ~0ul;
+ if (idx2cnt == idx2max)
+ {
+ idx2now = ~0ul;
+ break;
+ }
+ idx2now = idx2cnt++;
+ }
+ else
+ /* We pushed backward sequences. */
+ idx2now = backw2 = idx2cnt - 1;
}
}
- }
+ while (weights[idx2arr[idx2now]] == '\0');
+
+ /* See whether any or both strings are empty. */
+ if (idx1now == ~0ul || idx2now == ~0ul)
+ {
+ if (idx1now == idx2now)
+ /* Both ended. So far so good, both strings are equal at the
+ first level. */
+ break;
+
+ /* This means one string is shorter than the other. Find out
+ which one and return an appropriate value. */
+ result = idx1now == ~0ul ? -1 : 1;
+ goto free_and_return;
+ }
- if (s1run != s2run)
- return s1run != NULL ? 1 : -1;
+ /* Test for position if necessary. */
+ if (position && val1 != val2)
+ {
+ result = val1 - val2;
+ goto free_and_return;
+ }
+
+ /* Compare the two sequences. */
+ seq1len = weights[idx1arr[idx1now]++];
+ seq2len = weights[idx2arr[idx2now]++];
+ for (i = 0; i < seq1len && i < seq2len; ++i)
+ if (weights[idx1arr[idx1now]] != weights[idx2arr[idx2now]])
+ {
+ /* The sequences differ. */
+ result = weights[idx1arr[idx1now]] - weights[idx2arr[idx2now]];
+ goto free_and_return;
+ }
+ else
+ {
+ /* Increment the offsets. */
+ ++idx1arr[idx1now];
+ ++idx2arr[idx2now];
+ }
+
+ result = seq1len - seq2len;
+ if (result != 0)
+ goto free_and_return;
+ }
}
- return 0;
+ /* Free the memory if needed. */
+ free_and_return:
+ if (use_malloc)
+ free (idx1arr);
+
+ return result;
}
-#endif
projects / thirdparty / glibc.git / commitdiff
