mirror of
https://git.code.sf.net/p/ntfs-3g/ntfs-3g.git
synced 2024-11-27 03:53:48 +08:00
272 lines
6.1 KiB
C
272 lines
6.1 KiB
C
/**
|
|
* collate.c - NTFS collation handling. Originated from the Linux-NTFS project.
|
|
*
|
|
* Copyright (c) 2004 Anton Altaparmakov
|
|
* Copyright (c) 2005 Yura Pakhuchiy
|
|
*
|
|
* This program/include file is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as published
|
|
* by the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program/include file 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program (in the main directory of the NTFS-3G
|
|
* distribution in the file COPYING); if not, write to the Free Software
|
|
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#ifdef HAVE_ERRNO_H
|
|
#include <errno.h>
|
|
#endif
|
|
|
|
#include "attrib.h"
|
|
#include "index.h"
|
|
#include "collate.h"
|
|
#include "debug.h"
|
|
#include "unistr.h"
|
|
#include "logging.h"
|
|
|
|
/**
|
|
* ntfs_collate_binary - Which of two binary objects should be listed first
|
|
* @vol: unused
|
|
* @data1:
|
|
* @data1_len:
|
|
* @data2:
|
|
* @data2_len:
|
|
*
|
|
* Description...
|
|
*
|
|
* Returns:
|
|
*/
|
|
static int ntfs_collate_binary(ntfs_volume *vol __attribute__((unused)),
|
|
const void *data1, const int data1_len,
|
|
const void *data2, const int data2_len)
|
|
{
|
|
int rc;
|
|
|
|
ntfs_log_trace("Entering.\n");
|
|
rc = memcmp(data1, data2, min(data1_len, data2_len));
|
|
if (!rc && (data1_len != data2_len)) {
|
|
if (data1_len < data2_len)
|
|
rc = -1;
|
|
else
|
|
rc = 1;
|
|
}
|
|
ntfs_log_trace("Done, returning %i.\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ntfs_collate_ntofs_ulong - Which of two long ints should be listed first
|
|
* @vol: unused
|
|
* @data1:
|
|
* @data1_len:
|
|
* @data2:
|
|
* @data2_len:
|
|
*
|
|
* Description...
|
|
*
|
|
* Returns:
|
|
*/
|
|
static int ntfs_collate_ntofs_ulong(ntfs_volume *vol __attribute__((unused)),
|
|
const void *data1, const int data1_len,
|
|
const void *data2, const int data2_len)
|
|
{
|
|
int rc;
|
|
u32 d1, d2;
|
|
|
|
ntfs_log_trace("Entering.\n");
|
|
if (data1_len != data2_len || data1_len != 4) {
|
|
ntfs_log_error("data1_len or/and data2_len not equal to 4.\n");
|
|
return NTFS_COLLATION_ERROR;
|
|
}
|
|
d1 = le32_to_cpup(data1);
|
|
d2 = le32_to_cpup(data2);
|
|
if (d1 < d2)
|
|
rc = -1;
|
|
else {
|
|
if (d1 == d2)
|
|
rc = 0;
|
|
else
|
|
rc = 1;
|
|
}
|
|
ntfs_log_trace("Done, returning %i.\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ntfs_collate_ntofs_ulongs - Which of two le32 arrays should be listed first
|
|
*
|
|
* Returns: -1, 0 or 1 depending of how the arrays compare
|
|
*/
|
|
|
|
static int ntfs_collate_ntofs_ulongs(ntfs_volume *vol __attribute__((unused)),
|
|
const void *data1, const int data1_len,
|
|
const void *data2, const int data2_len)
|
|
{
|
|
int rc;
|
|
int len;
|
|
const le32 *p1, *p2;
|
|
u32 d1, d2;
|
|
|
|
ntfs_log_trace("Entering.\n");
|
|
if ((data1_len != data2_len) || (data1_len <= 0) || (data1_len & 3)) {
|
|
ntfs_log_error("data1_len or data2_len not valid\n");
|
|
return NTFS_COLLATION_ERROR;
|
|
}
|
|
p1 = (const le32*)data1;
|
|
p2 = (const le32*)data2;
|
|
len = data1_len;
|
|
do {
|
|
d1 = le32_to_cpup(p1);
|
|
p1++;
|
|
d2 = le32_to_cpup(p2);
|
|
p2++;
|
|
} while ((d1 == d2) && ((len -= 4) > 0));
|
|
if (d1 < d2)
|
|
rc = -1;
|
|
else {
|
|
if (d1 == d2)
|
|
rc = 0;
|
|
else
|
|
rc = 1;
|
|
}
|
|
ntfs_log_trace("Done, returning %i.\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ntfs_collate_ntofs_security_hash - Which of two security descriptors
|
|
* should be listed first
|
|
* @vol: unused
|
|
* @data1:
|
|
* @data1_len:
|
|
* @data2:
|
|
* @data2_len:
|
|
*
|
|
* JPA compare two security hash keys made of two unsigned le32
|
|
*
|
|
* Returns: -1, 0 or 1 depending of how the keys compare
|
|
*/
|
|
static int ntfs_collate_ntofs_security_hash(ntfs_volume *vol __attribute__((unused)),
|
|
const void *data1, const int data1_len,
|
|
const void *data2, const int data2_len)
|
|
{
|
|
int rc;
|
|
u32 d1, d2;
|
|
const le32 *p1, *p2;
|
|
|
|
ntfs_log_trace("Entering.\n");
|
|
if (data1_len != data2_len || data1_len != 8) {
|
|
ntfs_log_error("data1_len or/and data2_len not equal to 8.\n");
|
|
return NTFS_COLLATION_ERROR;
|
|
}
|
|
p1 = (const le32*)data1;
|
|
p2 = (const le32*)data2;
|
|
d1 = le32_to_cpup(p1);
|
|
d2 = le32_to_cpup(p2);
|
|
if (d1 < d2)
|
|
rc = -1;
|
|
else {
|
|
if (d1 > d2)
|
|
rc = 1;
|
|
else {
|
|
p1++;
|
|
p2++;
|
|
d1 = le32_to_cpup(p1);
|
|
d2 = le32_to_cpup(p2);
|
|
if (d1 < d2)
|
|
rc = -1;
|
|
else {
|
|
if (d1 > d2)
|
|
rc = 1;
|
|
else
|
|
rc = 0;
|
|
}
|
|
}
|
|
}
|
|
ntfs_log_trace("Done, returning %i.\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ntfs_collate_file_name - Which of two filenames should be listed first
|
|
* @vol:
|
|
* @data1:
|
|
* @data1_len: unused
|
|
* @data2:
|
|
* @data2_len: unused
|
|
*
|
|
* Description...
|
|
*
|
|
* Returns:
|
|
*/
|
|
static int ntfs_collate_file_name(ntfs_volume *vol,
|
|
const void *data1, const int data1_len __attribute__((unused)),
|
|
const void *data2, const int data2_len __attribute__((unused)))
|
|
{
|
|
const FILE_NAME_ATTR *file_name_attr1;
|
|
const FILE_NAME_ATTR *file_name_attr2;
|
|
int rc;
|
|
|
|
ntfs_log_trace("Entering.\n");
|
|
file_name_attr1 = (const FILE_NAME_ATTR*)data1;
|
|
file_name_attr2 = (const FILE_NAME_ATTR*)data2;
|
|
rc = ntfs_names_full_collate(
|
|
(ntfschar*)&file_name_attr1->file_name,
|
|
file_name_attr1->file_name_length,
|
|
(ntfschar*)&file_name_attr2->file_name,
|
|
file_name_attr2->file_name_length,
|
|
CASE_SENSITIVE, vol->upcase, vol->upcase_len);
|
|
ntfs_log_trace("Done, returning %i.\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Get a pointer to appropriate collation function.
|
|
*
|
|
* Returns NULL if the needed function is not implemented
|
|
*/
|
|
|
|
COLLATE ntfs_get_collate_function(COLLATION_RULES cr)
|
|
{
|
|
COLLATE collate;
|
|
|
|
switch (cr) {
|
|
case COLLATION_BINARY :
|
|
collate = ntfs_collate_binary;
|
|
break;
|
|
case COLLATION_FILE_NAME :
|
|
collate = ntfs_collate_file_name;
|
|
break;
|
|
case COLLATION_NTOFS_SECURITY_HASH :
|
|
collate = ntfs_collate_ntofs_security_hash;
|
|
break;
|
|
case COLLATION_NTOFS_ULONG :
|
|
collate = ntfs_collate_ntofs_ulong;
|
|
break;
|
|
case COLLATION_NTOFS_ULONGS :
|
|
collate = ntfs_collate_ntofs_ulongs;
|
|
break;
|
|
default :
|
|
errno = EOPNOTSUPP;
|
|
collate = (COLLATE)NULL;
|
|
break;
|
|
}
|
|
return (collate);
|
|
}
|