mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-03 04:01:43 +08:00
450 lines
11 KiB
C
450 lines
11 KiB
C
/* Copyright (C) 1995-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Written by Ulrich Drepper <drepper@gnu.org>, 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 <assert.h>
|
|
#include <langinfo.h>
|
|
#include <locale.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/param.h>
|
|
|
|
#ifndef STRING_TYPE
|
|
# define STRING_TYPE char
|
|
# define USTRING_TYPE unsigned char
|
|
# define STRXFRM __strxfrm_l
|
|
# define STRCMP strcmp
|
|
# define STRLEN strlen
|
|
# define STPNCPY __stpncpy
|
|
# define WEIGHT_H "../locale/weight.h"
|
|
# define SUFFIX MB
|
|
# define L(arg) arg
|
|
#endif
|
|
|
|
#define CONCAT(a,b) CONCAT1(a,b)
|
|
#define CONCAT1(a,b) a##b
|
|
|
|
#include "../locale/localeinfo.h"
|
|
|
|
|
|
#ifndef WIDE_CHAR_VERSION
|
|
|
|
/* We need UTF-8 encoding of numbers. */
|
|
static int
|
|
utf8_encode (char *buf, int val)
|
|
{
|
|
int retval;
|
|
|
|
if (val < 0x80)
|
|
{
|
|
*buf++ = (char) val;
|
|
retval = 1;
|
|
}
|
|
else
|
|
{
|
|
int step;
|
|
|
|
for (step = 2; step < 6; ++step)
|
|
if ((val & (~(uint32_t)0 << (5 * step + 1))) == 0)
|
|
break;
|
|
retval = step;
|
|
|
|
*buf = (unsigned char) (~0xff >> step);
|
|
--step;
|
|
do
|
|
{
|
|
buf[step] = 0x80 | (val & 0x3f);
|
|
val >>= 6;
|
|
}
|
|
while (--step > 0);
|
|
*buf |= val;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
#endif
|
|
|
|
|
|
size_t
|
|
STRXFRM (STRING_TYPE *dest, const STRING_TYPE *src, size_t n, __locale_t l)
|
|
{
|
|
struct __locale_data *current = l->__locales[LC_COLLATE];
|
|
uint_fast32_t nrules = current->values[_NL_ITEM_INDEX (_NL_COLLATE_NRULES)].word;
|
|
/* 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 USTRING_TYPE *weights;
|
|
const USTRING_TYPE *extra;
|
|
const int32_t *indirect;
|
|
uint_fast32_t pass;
|
|
size_t needed;
|
|
size_t last_needed;
|
|
const USTRING_TYPE *usrc;
|
|
size_t srclen = STRLEN (src);
|
|
int32_t *idxarr;
|
|
unsigned char *rulearr;
|
|
size_t idxmax;
|
|
size_t idxcnt;
|
|
int use_malloc;
|
|
|
|
#include WEIGHT_H
|
|
|
|
if (nrules == 0)
|
|
{
|
|
if (n != 0)
|
|
STPNCPY (dest, src, MIN (srclen + 1, n));
|
|
|
|
return srclen;
|
|
}
|
|
|
|
rulesets = (const unsigned char *)
|
|
current->values[_NL_ITEM_INDEX (_NL_COLLATE_RULESETS)].string;
|
|
table = (const int32_t *)
|
|
current->values[_NL_ITEM_INDEX (CONCAT(_NL_COLLATE_TABLE,SUFFIX))].string;
|
|
weights = (const USTRING_TYPE *)
|
|
current->values[_NL_ITEM_INDEX (CONCAT(_NL_COLLATE_WEIGHT,SUFFIX))].string;
|
|
extra = (const USTRING_TYPE *)
|
|
current->values[_NL_ITEM_INDEX (CONCAT(_NL_COLLATE_EXTRA,SUFFIX))].string;
|
|
indirect = (const int32_t *)
|
|
current->values[_NL_ITEM_INDEX (CONCAT(_NL_COLLATE_INDIRECT,SUFFIX))].string;
|
|
use_malloc = 0;
|
|
|
|
assert (((uintptr_t) table) % __alignof__ (table[0]) == 0);
|
|
assert (((uintptr_t) weights) % __alignof__ (weights[0]) == 0);
|
|
assert (((uintptr_t) extra) % __alignof__ (extra[0]) == 0);
|
|
assert (((uintptr_t) indirect) % __alignof__ (indirect[0]) == 0);
|
|
|
|
/* Handle an empty string as a special case. */
|
|
if (srclen == 0)
|
|
{
|
|
if (n != 0)
|
|
*dest = L('\0');
|
|
return 0;
|
|
}
|
|
|
|
/* We need the elements of the string as unsigned values since they
|
|
are used as indeces. */
|
|
usrc = (const USTRING_TYPE *) src;
|
|
|
|
/* 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. */
|
|
if (! __libc_use_alloca ((srclen + 1) * (sizeof (int32_t) + 1)))
|
|
{
|
|
idxarr = (int32_t *) malloc ((srclen + 1) * (sizeof (int32_t) + 1));
|
|
rulearr = (unsigned char *) &idxarr[srclen];
|
|
|
|
if (idxarr == 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:
|
|
idxarr = (int32_t *) alloca (srclen * sizeof (int32_t));
|
|
rulearr = (unsigned char *) alloca (srclen + 1);
|
|
}
|
|
|
|
idxmax = 0;
|
|
do
|
|
{
|
|
int32_t tmp = findidx (&usrc, -1);
|
|
rulearr[idxmax] = tmp >> 24;
|
|
idxarr[idxmax] = tmp & 0xffffff;
|
|
|
|
++idxmax;
|
|
}
|
|
while (*usrc != L('\0'));
|
|
|
|
/* This element is only read, the value never used but to determine
|
|
another value which then is ignored. */
|
|
rulearr[idxmax] = '\0';
|
|
|
|
/* Now the passes over the weights. We now use the indeces we found
|
|
before. */
|
|
needed = 0;
|
|
for (pass = 0; pass < nrules; ++pass)
|
|
{
|
|
size_t backw_stop = ~0ul;
|
|
int rule = rulesets[rulearr[0] * nrules + pass];
|
|
/* We assume that if a rule has defined `position' in one section
|
|
this is true for all of them. */
|
|
int position = rule & sort_position;
|
|
|
|
last_needed = needed;
|
|
if (position == 0)
|
|
{
|
|
for (idxcnt = 0; idxcnt < idxmax; ++idxcnt)
|
|
{
|
|
if ((rule & sort_forward) != 0)
|
|
{
|
|
size_t len;
|
|
|
|
if (backw_stop != ~0ul)
|
|
{
|
|
/* Handle the pushed elements now. */
|
|
size_t backw;
|
|
|
|
for (backw = idxcnt; backw > backw_stop; )
|
|
{
|
|
--backw;
|
|
len = weights[idxarr[backw]++];
|
|
|
|
if (needed + len < n)
|
|
while (len-- > 0)
|
|
dest[needed++] = weights[idxarr[backw]++];
|
|
else
|
|
{
|
|
/* No more characters fit into the buffer. */
|
|
needed += len;
|
|
idxarr[backw] += len;
|
|
}
|
|
}
|
|
|
|
backw_stop = ~0ul;
|
|
}
|
|
|
|
/* Now handle the forward element. */
|
|
len = weights[idxarr[idxcnt]++];
|
|
if (needed + len < n)
|
|
while (len-- > 0)
|
|
dest[needed++] = weights[idxarr[idxcnt]++];
|
|
else
|
|
{
|
|
/* No more characters fit into the buffer. */
|
|
needed += len;
|
|
idxarr[idxcnt] += len;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Remember where the backwards series started. */
|
|
if (backw_stop == ~0ul)
|
|
backw_stop = idxcnt;
|
|
}
|
|
|
|
rule = rulesets[rulearr[idxcnt + 1] * nrules + pass];
|
|
}
|
|
|
|
|
|
if (backw_stop != ~0ul)
|
|
{
|
|
/* Handle the pushed elements now. */
|
|
size_t backw;
|
|
|
|
backw = idxcnt;
|
|
while (backw > backw_stop)
|
|
{
|
|
size_t len = weights[idxarr[--backw]++];
|
|
|
|
if (needed + len < n)
|
|
while (len-- > 0)
|
|
dest[needed++] = weights[idxarr[backw]++];
|
|
else
|
|
{
|
|
/* No more characters fit into the buffer. */
|
|
needed += len;
|
|
idxarr[backw] += len;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
int val = 1;
|
|
#ifndef WIDE_CHAR_VERSION
|
|
char buf[7];
|
|
size_t buflen;
|
|
#endif
|
|
size_t i;
|
|
|
|
for (idxcnt = 0; idxcnt < idxmax; ++idxcnt)
|
|
{
|
|
if ((rule & sort_forward) != 0)
|
|
{
|
|
size_t len;
|
|
|
|
if (backw_stop != ~0ul)
|
|
{
|
|
/* Handle the pushed elements now. */
|
|
size_t backw;
|
|
|
|
for (backw = idxcnt; backw > backw_stop; )
|
|
{
|
|
--backw;
|
|
len = weights[idxarr[backw]++];
|
|
if (len != 0)
|
|
{
|
|
#ifdef WIDE_CHAR_VERSION
|
|
if (needed + 1 + len < n)
|
|
{
|
|
dest[needed] = val;
|
|
for (i = 0; i < len; ++i)
|
|
dest[needed + 1 + i] =
|
|
weights[idxarr[backw] + i];
|
|
}
|
|
needed += 1 + len;
|
|
#else
|
|
buflen = utf8_encode (buf, val);
|
|
if (needed + buflen + len < n)
|
|
{
|
|
for (i = 0; i < buflen; ++i)
|
|
dest[needed + i] = buf[i];
|
|
for (i = 0; i < len; ++i)
|
|
dest[needed + buflen + i] =
|
|
weights[idxarr[backw] + i];
|
|
}
|
|
needed += buflen + len;
|
|
#endif
|
|
idxarr[backw] += len;
|
|
val = 1;
|
|
}
|
|
else
|
|
++val;
|
|
}
|
|
|
|
backw_stop = ~0ul;
|
|
}
|
|
|
|
/* Now handle the forward element. */
|
|
len = weights[idxarr[idxcnt]++];
|
|
if (len != 0)
|
|
{
|
|
#ifdef WIDE_CHAR_VERSION
|
|
if (needed + 1+ len < n)
|
|
{
|
|
dest[needed] = val;
|
|
for (i = 0; i < len; ++i)
|
|
dest[needed + 1 + i] =
|
|
weights[idxarr[idxcnt] + i];
|
|
}
|
|
needed += 1 + len;
|
|
#else
|
|
buflen = utf8_encode (buf, val);
|
|
if (needed + buflen + len < n)
|
|
{
|
|
for (i = 0; i < buflen; ++i)
|
|
dest[needed + i] = buf[i];
|
|
for (i = 0; i < len; ++i)
|
|
dest[needed + buflen + i] =
|
|
weights[idxarr[idxcnt] + i];
|
|
}
|
|
needed += buflen + len;
|
|
#endif
|
|
idxarr[idxcnt] += len;
|
|
val = 1;
|
|
}
|
|
else
|
|
/* Note that we don't have to increment `idxarr[idxcnt]'
|
|
since the length is zero. */
|
|
++val;
|
|
}
|
|
else
|
|
{
|
|
/* Remember where the backwards series started. */
|
|
if (backw_stop == ~0ul)
|
|
backw_stop = idxcnt;
|
|
}
|
|
|
|
rule = rulesets[rulearr[idxcnt + 1] * nrules + pass];
|
|
}
|
|
|
|
if (backw_stop != ~0ul)
|
|
{
|
|
/* Handle the pushed elements now. */
|
|
size_t backw;
|
|
|
|
backw = idxmax - 1;
|
|
while (backw > backw_stop)
|
|
{
|
|
size_t len = weights[idxarr[--backw]++];
|
|
if (len != 0)
|
|
{
|
|
#ifdef WIDE_CHAR_VERSION
|
|
if (needed + 1 + len < n)
|
|
{
|
|
dest[needed] = val;
|
|
for (i = 0; i < len; ++i)
|
|
dest[needed + 1 + i] =
|
|
weights[idxarr[backw] + i];
|
|
}
|
|
needed += 1 + len;
|
|
#else
|
|
buflen = utf8_encode (buf, val);
|
|
if (needed + buflen + len < n)
|
|
{
|
|
for (i = 0; i < buflen; ++i)
|
|
dest[needed + i] = buf[i];
|
|
for (i = 0; i < len; ++i)
|
|
dest[needed + buflen + i] =
|
|
weights[idxarr[backw] + i];
|
|
}
|
|
needed += buflen + len;
|
|
#endif
|
|
idxarr[backw] += len;
|
|
val = 1;
|
|
}
|
|
else
|
|
++val;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Finally store the byte to separate the passes or terminate
|
|
the string. */
|
|
if (needed < n)
|
|
dest[needed] = pass + 1 < nrules ? L('\1') : L('\0');
|
|
++needed;
|
|
}
|
|
|
|
/* This is a little optimization: many collation specifications have
|
|
a `position' rule at the end and if no non-ignored character
|
|
is found the last \1 byte is immediately followed by a \0 byte
|
|
signalling this. We can avoid the \1 byte(s). */
|
|
if (needed > 2 && needed == last_needed + 1)
|
|
{
|
|
/* Remove the \1 byte. */
|
|
if (--needed <= n)
|
|
dest[needed - 1] = L('\0');
|
|
}
|
|
|
|
/* Free the memory if needed. */
|
|
if (use_malloc)
|
|
free (idxarr);
|
|
|
|
/* Return the number of bytes/words we need, but don't count the NUL
|
|
byte/word at the end. */
|
|
return needed - 1;
|
|
}
|
|
libc_hidden_def (STRXFRM)
|
|
|
|
#ifndef WIDE_CHAR_VERSION
|
|
weak_alias (__strxfrm_l, strxfrm_l)
|
|
#endif
|