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diff --git a/libntfs-3g/collate.c b/libntfs-3g/collate.c new file mode 100755 index 0000000..5f7a015 --- a/dev/null +++ b/libntfs-3g/collate.c @@ -0,0 +1,271 @@ +/** + * 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); +} |