/src/libfshfs/libfshfs/libfshfs_fork_descriptor.c

Source
/*
 * Fork descriptor functions
 *
 * Copyright (C) 2009-2026, Joachim Metz <joachim.metz@gmail.com>
 *
 * Refer to AUTHORS for acknowledgements.
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Lesser General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <common.h>
#include <byte_stream.h>
#include <memory.h>
#include <types.h>

#include "libfshfs_extent.h"
#include "libfshfs_fork_descriptor.h"
#include "libfshfs_libcerror.h"
#include "libfshfs_libcnotify.h"

#include "fshfs_fork_descriptor.h"

/* Creates a fork descriptor
 * Make sure the value fork_descriptor is referencing, is set to NULL
 * Returns 1 if successful or -1 on error
 */
int libfshfs_fork_descriptor_initialize(
     libfshfs_fork_descriptor_t **fork_descriptor,
     libcerror_error_t **error )
{
  static char *function = "libfshfs_fork_descriptor_initialize";

  if( fork_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid fork descriptor.",
     function );

    return( -1 );
  }
  if( *fork_descriptor != NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
     "%s: invalid fork descriptor value already set.",
     function );

    return( -1 );
  }
  *fork_descriptor = memory_allocate_structure(
                      libfshfs_fork_descriptor_t );

  if( *fork_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
     "%s: unable to create fork descriptor.",
     function );

    goto on_error;
  }
  if( memory_set(
       *fork_descriptor,
       0,
       sizeof( libfshfs_fork_descriptor_t ) ) == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_SET_FAILED,
     "%s: unable to clear fork descriptor.",
     function );

    goto on_error;
  }
  return( 1 );

on_error:
  if( *fork_descriptor != NULL )
  {
    memory_free(
     *fork_descriptor );

    *fork_descriptor = NULL;
  }
  return( -1 );
}

/* Frees fork descriptor
 * Returns 1 if successful or -1 on error
 */
int libfshfs_fork_descriptor_free(
     libfshfs_fork_descriptor_t **fork_descriptor,
     libcerror_error_t **error )
{
  static char *function = "libfshfs_fork_descriptor_free";

  if( fork_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid fork descriptor.",
     function );

    return( -1 );
  }
  if( *fork_descriptor != NULL )
  {
    memory_free(
     *fork_descriptor );

    *fork_descriptor = NULL;
  }
  return( 1 );
}

/* Clones a fork descriptor
 * Returns 1 if successful or -1 on error
 */
int libfshfs_fork_descriptor_clone(
     libfshfs_fork_descriptor_t **destination_fork_descriptor,
     libfshfs_fork_descriptor_t *source_fork_descriptor,
     libcerror_error_t **error )
{
  static char *function = "libfshfs_fork_descriptor_clone";

  if( destination_fork_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid destination fork descriptor.",
     function );

    return( -1 );
  }
  if( *destination_fork_descriptor != NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
     "%s: invalid destination fork descriptor value already set.",
     function );

    return( -1 );
  }
  if( source_fork_descriptor == NULL )
  {
    *destination_fork_descriptor = NULL;

    return( 1 );
  }
  *destination_fork_descriptor = memory_allocate_structure(
                                  libfshfs_fork_descriptor_t );

  if( *destination_fork_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
     "%s: unable to create destination fork descriptor.",
     function );

    goto on_error;
  }
  if( memory_copy(
       *destination_fork_descriptor,
       source_fork_descriptor,
       sizeof( libfshfs_fork_descriptor_t ) ) == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_COPY_FAILED,
     "%s: unable to copy source to destination fork descriptor.",
     function );

    goto on_error;
  }
  return( 1 );

on_error:
  if( *destination_fork_descriptor != NULL )
  {
    memory_free(
     *destination_fork_descriptor );

    *destination_fork_descriptor = NULL;
  }
  return( -1 );
}

/* Reads the fork descriptor
 * Returns 1 if successful or -1 on error
 */
int libfshfs_fork_descriptor_read_data(
     libfshfs_fork_descriptor_t *fork_descriptor,
     const uint8_t *data,
     size_t data_size,
     libcerror_error_t **error )
{
  static char *function            = "libfshfs_fork_descriptor_read_data";
  size_t extent_data_offset        = 0;
  uint32_t extent_block_number     = 0;
  uint32_t extent_number_of_blocks = 0;
  int extent_index                 = 0;

#if defined( HAVE_DEBUG_OUTPUT )
  uint32_t value_32bit             = 0;
#endif

  if( fork_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid fork descriptor.",
     function );

    return( -1 );
  }
  if( data == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
     "%s: invalid data.",
     function );

    return( -1 );
  }
  if( data_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid data size value out of bounds.",
     function );

    return( -1 );
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: fork descriptor data:\n",
     function );
    libcnotify_print_data(
     data,
     data_size,
     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );
  }
#endif
  if( data_size != 80 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
     "%s: unsupported fork descriptor data size: %" PRIzd "\n",
     function,
     data_size );

    return( -1 );
  }
  byte_stream_copy_to_uint64_big_endian(
   ( (fshfs_fork_descriptor_t *) data )->logical_size,
   fork_descriptor->size );

  byte_stream_copy_to_uint32_big_endian(
   ( (fshfs_fork_descriptor_t *) data )->number_of_blocks,
   fork_descriptor->number_of_blocks );

#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: logical size\t\t\t: %" PRIu64 "\n",
     function,
     fork_descriptor->size );

    byte_stream_copy_to_uint32_big_endian(
     ( (fshfs_fork_descriptor_t *) data )->clump_size,
     value_32bit );
    libcnotify_printf(
     "%s: clump size\t\t\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    libcnotify_printf(
     "%s: number of blocks\t\t\t: %" PRIu32 "\n",
     function,
     fork_descriptor->number_of_blocks );
  }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  while( extent_data_offset < 64 )
  {
    byte_stream_copy_to_uint32_big_endian(
     &( ( ( (fshfs_fork_descriptor_t *) data )->extents )[ extent_data_offset ] ),
     extent_block_number );

    extent_data_offset += 4;

    byte_stream_copy_to_uint32_big_endian(
     &( ( ( (fshfs_fork_descriptor_t *) data )->extents )[ extent_data_offset ] ),
     extent_number_of_blocks );

    extent_data_offset += 4;

#if defined( HAVE_DEBUG_OUTPUT )
    if( libcnotify_verbose != 0 )
    {
      libcnotify_printf(
       "%s: extent: %d block number\t\t: %" PRIu32 "\n",
       function,
       extent_index,
       extent_block_number );

      libcnotify_printf(
       "%s: extent: %d number of blocks\t\t: %" PRIu32 "\n",
       function,
       extent_index,
       extent_number_of_blocks );
    }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

    fork_descriptor->extents[ extent_index ][ 0 ] = extent_block_number;
    fork_descriptor->extents[ extent_index ][ 1 ] = extent_number_of_blocks;

    fork_descriptor->number_of_blocks_in_extents += extent_number_of_blocks;

    extent_index++;
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "\n" );
  }
#endif
  return( 1 );
}

/* Determines if the fork has extents in the extents (overflow) file.
 * Returns 1 if the fork has extents in the extents (overflow) file, 0 if not or -1 on error
 */
int libfshfs_fork_descriptor_has_extents_overflow(
     libfshfs_fork_descriptor_t *fork_descriptor,
     libcerror_error_t **error )
{
  static char *function = "libfshfs_fork_descriptor_has_extents_overflow";

  if( fork_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid fork descriptor.",
     function );

    return( -1 );
  }
  if( fork_descriptor->number_of_blocks_in_extents < fork_descriptor->number_of_blocks )
  {
    return( 1 );
  }
  return( 0 );
}

/* Retrieves the extents
 * Returns 1 if successful or -1 on error
 */
int libfshfs_fork_descriptor_get_extents(
     libfshfs_fork_descriptor_t *fork_descriptor,
     libcdata_array_t *extents,
     libcerror_error_t **error )
{
  libfshfs_extent_t *extent        = NULL;
  static char *function            = "libfshfs_fork_descriptor_get_extents";
  uint32_t extent_block_number     = 0;
  uint32_t extent_number_of_blocks = 0;
  int entry_index                  = 0;
  int extent_index                 = 0;

  if( fork_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid fork descriptor.",
     function );

    return( -1 );
  }
  for( extent_index = 0;
       extent_index < 8;
       extent_index++ )
  {
    extent_block_number     = fork_descriptor->extents[ extent_index ][ 0 ];
    extent_number_of_blocks = fork_descriptor->extents[ extent_index ][ 1 ];

    if( ( extent_block_number == 0 )
     || ( extent_number_of_blocks == 0 ) )
    {
      break;
    }
    if( libfshfs_extent_initialize(
         &extent,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
       "%s: unable to create extent.",
       function );

      goto on_error;
    }
    extent->block_number     = extent_block_number;
    extent->number_of_blocks = extent_number_of_blocks;

    if( libcdata_array_append_entry(
         extents,
         &entry_index,
         (intptr_t *) extent,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,
       "%s: unable to append extent to array.",
       function );

      goto on_error;
    }
    extent = NULL;
  }
  return( 1 );

on_error:
  if( extent != NULL )
  {
    libfshfs_extent_free(
     &extent,
     NULL );
  }
  libcdata_array_empty(
   extents,
   (int (*)(intptr_t **, libcerror_error_t **)) &libfshfs_extent_free,
   NULL );

  return( -1 );
}


Coverage Report

Created: 2026-03-05 07:45

Line	Count	Source
1		/*
2		* Fork descriptor functions
3		*
4		* Copyright (C) 2009-2026, Joachim Metz <joachim.metz@gmail.com>
5		*
6		* Refer to AUTHORS for acknowledgements.
7		*
8		* This program is free software: you can redistribute it and/or modify
9		* it under the terms of the GNU Lesser General Public License as published by
10		* the Free Software Foundation, either version 3 of the License, or
11		* (at your option) any later version.
12		*
13		* This program is distributed in the hope that it will be useful,
14		* but WITHOUT ANY WARRANTY; without even the implied warranty of
15		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16		* GNU General Public License for more details.
17		*
18		* You should have received a copy of the GNU Lesser General Public License
19		* along with this program. If not, see <https://www.gnu.org/licenses/>.
20		*/
21
22		#include <common.h>
23		#include <byte_stream.h>
24		#include <memory.h>
25		#include <types.h>
26
27		#include "libfshfs_extent.h"
28		#include "libfshfs_fork_descriptor.h"
29		#include "libfshfs_libcerror.h"
30		#include "libfshfs_libcnotify.h"
31
32		#include "fshfs_fork_descriptor.h"
33
34		/* Creates a fork descriptor
35		* Make sure the value fork_descriptor is referencing, is set to NULL
36		* Returns 1 if successful or -1 on error
37		*/
38		int libfshfs_fork_descriptor_initialize(
39		libfshfs_fork_descriptor_t **fork_descriptor,
40		libcerror_error_t **error )
41	33.0k	{
42	33.0k	static char *function = "libfshfs_fork_descriptor_initialize";
43
44	33.0k	if( fork_descriptor == NULL )
45	0	{
46	0	libcerror_error_set(
47	0	error,
48	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
49	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
50	0	"%s: invalid fork descriptor.",
51	0	function );
52
53	0	return( -1 );
54	0	}
55	33.0k	if( *fork_descriptor != NULL )
56	0	{
57	0	libcerror_error_set(
58	0	error,
59	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
60	0	LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
61	0	"%s: invalid fork descriptor value already set.",
62	0	function );
63
64	0	return( -1 );
65	0	}
66	33.0k	*fork_descriptor = memory_allocate_structure(
67	33.0k	libfshfs_fork_descriptor_t );
68
69	33.0k	if( *fork_descriptor == NULL )
70	0	{
71	0	libcerror_error_set(
72	0	error,
73	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
74	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
75	0	"%s: unable to create fork descriptor.",
76	0	function );
77
78	0	goto on_error;
79	0	}
80	33.0k	if( memory_set(
81	33.0k	*fork_descriptor,
82	33.0k	0,
83	33.0k	sizeof( libfshfs_fork_descriptor_t ) ) == NULL )
84	0	{
85	0	libcerror_error_set(
86	0	error,
87	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
88	0	LIBCERROR_MEMORY_ERROR_SET_FAILED,
89	0	"%s: unable to clear fork descriptor.",
90	0	function );
91
92	0	goto on_error;
93	0	}
94	33.0k	return( 1 );
95
96	0	on_error:
97	0	if( *fork_descriptor != NULL )
98	0	{
99	0	memory_free(
100	0	*fork_descriptor );
101
102	0	*fork_descriptor = NULL;
103	0	}
104	0	return( -1 );
105	33.0k	}
106
107		/* Frees fork descriptor
108		* Returns 1 if successful or -1 on error
109		*/
110		int libfshfs_fork_descriptor_free(
111		libfshfs_fork_descriptor_t **fork_descriptor,
112		libcerror_error_t **error )
113	36.0k	{
114	36.0k	static char *function = "libfshfs_fork_descriptor_free";
115
116	36.0k	if( fork_descriptor == NULL )
117	0	{
118	0	libcerror_error_set(
119	0	error,
120	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
121	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
122	0	"%s: invalid fork descriptor.",
123	0	function );
124
125	0	return( -1 );
126	0	}
127	36.0k	if( *fork_descriptor != NULL )
128	35.8k	{
129	35.8k	memory_free(
130	35.8k	*fork_descriptor );
131
132	35.8k	*fork_descriptor = NULL;
133	35.8k	}
134	36.0k	return( 1 );
135	36.0k	}
136
137		/* Clones a fork descriptor
138		* Returns 1 if successful or -1 on error
139		*/
140		int libfshfs_fork_descriptor_clone(
141		libfshfs_fork_descriptor_t **destination_fork_descriptor,
142		libfshfs_fork_descriptor_t *source_fork_descriptor,
143		libcerror_error_t **error )
144	2.99k	{
145	2.99k	static char *function = "libfshfs_fork_descriptor_clone";
146
147	2.99k	if( destination_fork_descriptor == NULL )
148	0	{
149	0	libcerror_error_set(
150	0	error,
151	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
152	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
153	0	"%s: invalid destination fork descriptor.",
154	0	function );
155
156	0	return( -1 );
157	0	}
158	2.99k	if( *destination_fork_descriptor != NULL )
159	0	{
160	0	libcerror_error_set(
161	0	error,
162	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
163	0	LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
164	0	"%s: invalid destination fork descriptor value already set.",
165	0	function );
166
167	0	return( -1 );
168	0	}
169	2.99k	if( source_fork_descriptor == NULL )
170	158	{
171	158	*destination_fork_descriptor = NULL;
172
173	158	return( 1 );
174	158	}
175	2.83k	*destination_fork_descriptor = memory_allocate_structure(
176	2.83k	libfshfs_fork_descriptor_t );
177
178	2.83k	if( *destination_fork_descriptor == NULL )
179	0	{
180	0	libcerror_error_set(
181	0	error,
182	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
183	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
184	0	"%s: unable to create destination fork descriptor.",
185	0	function );
186
187	0	goto on_error;
188	0	}
189	2.83k	if( memory_copy(
190	2.83k	*destination_fork_descriptor,
191	2.83k	source_fork_descriptor,
192	2.83k	sizeof( libfshfs_fork_descriptor_t ) ) == NULL )
193	0	{
194	0	libcerror_error_set(
195	0	error,
196	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
197	0	LIBCERROR_MEMORY_ERROR_COPY_FAILED,
198	0	"%s: unable to copy source to destination fork descriptor.",
199	0	function );
200
201	0	goto on_error;
202	0	}
203	2.83k	return( 1 );
204
205	0	on_error:
206	0	if( *destination_fork_descriptor != NULL )
207	0	{
208	0	memory_free(
209	0	*destination_fork_descriptor );
210
211	0	*destination_fork_descriptor = NULL;
212	0	}
213	0	return( -1 );
214	2.83k	}
215
216		/* Reads the fork descriptor
217		* Returns 1 if successful or -1 on error
218		*/
219		int libfshfs_fork_descriptor_read_data(
220		libfshfs_fork_descriptor_t *fork_descriptor,
221		const uint8_t *data,
222		size_t data_size,
223		libcerror_error_t **error )
224	28.0k	{
225	28.0k	static char *function = "libfshfs_fork_descriptor_read_data";
226	28.0k	size_t extent_data_offset = 0;
227	28.0k	uint32_t extent_block_number = 0;
228	28.0k	uint32_t extent_number_of_blocks = 0;
229	28.0k	int extent_index = 0;
230
231		#if defined( HAVE_DEBUG_OUTPUT )
232		uint32_t value_32bit = 0;
233		#endif
234
235	28.0k	if( fork_descriptor == NULL )
236	0	{
237	0	libcerror_error_set(
238	0	error,
239	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
240	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
241	0	"%s: invalid fork descriptor.",
242	0	function );
243
244	0	return( -1 );
245	0	}
246	28.0k	if( data == NULL )
247	0	{
248	0	libcerror_error_set(
249	0	error,
250	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
251	0	LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
252	0	"%s: invalid data.",
253	0	function );
254
255	0	return( -1 );
256	0	}
257	28.0k	if( data_size > (size_t) SSIZE_MAX )
258	0	{
259	0	libcerror_error_set(
260	0	error,
261	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
262	0	LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
263	0	"%s: invalid data size value out of bounds.",
264	0	function );
265
266	0	return( -1 );
267	0	}
268		#if defined( HAVE_DEBUG_OUTPUT )
269		if( libcnotify_verbose != 0 )
270		{
271		libcnotify_printf(
272		"%s: fork descriptor data:\n",
273		function );
274		libcnotify_print_data(
275		data,
276		data_size,
277		LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );
278		}
279		#endif
280	28.0k	if( data_size != 80 )
281	0	{
282	0	libcerror_error_set(
283	0	error,
284	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
285	0	LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
286	0	"%s: unsupported fork descriptor data size: %" PRIzd "\n",
287	0	function,
288	0	data_size );
289
290	0	return( -1 );
291	0	}
292	28.0k	byte_stream_copy_to_uint64_big_endian(
293	28.0k	( (fshfs_fork_descriptor_t *) data )->logical_size,
294	28.0k	fork_descriptor->size );
295
296	28.0k	byte_stream_copy_to_uint32_big_endian(
297	28.0k	( (fshfs_fork_descriptor_t *) data )->number_of_blocks,
298	28.0k	fork_descriptor->number_of_blocks );
299
300		#if defined( HAVE_DEBUG_OUTPUT )
301		if( libcnotify_verbose != 0 )
302		{
303		libcnotify_printf(
304		"%s: logical size\t\t\t: %" PRIu64 "\n",
305		function,
306		fork_descriptor->size );
307
308		byte_stream_copy_to_uint32_big_endian(
309		( (fshfs_fork_descriptor_t *) data )->clump_size,
310		value_32bit );
311		libcnotify_printf(
312		"%s: clump size\t\t\t\t: %" PRIu32 "\n",
313		function,
314		value_32bit );
315
316		libcnotify_printf(
317		"%s: number of blocks\t\t\t: %" PRIu32 "\n",
318		function,
319		fork_descriptor->number_of_blocks );
320		}
321		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
322
323	252k	while( extent_data_offset < 64 )
324	224k	{
325	224k	byte_stream_copy_to_uint32_big_endian(
326	224k	&( ( ( (fshfs_fork_descriptor_t *) data )->extents )[ extent_data_offset ] ),
327	224k	extent_block_number );
328
329	224k	extent_data_offset += 4;
330
331	224k	byte_stream_copy_to_uint32_big_endian(
332	224k	&( ( ( (fshfs_fork_descriptor_t *) data )->extents )[ extent_data_offset ] ),
333	224k	extent_number_of_blocks );
334
335	224k	extent_data_offset += 4;
336
337		#if defined( HAVE_DEBUG_OUTPUT )
338		if( libcnotify_verbose != 0 )
339		{
340		libcnotify_printf(
341		"%s: extent: %d block number\t\t: %" PRIu32 "\n",
342		function,
343		extent_index,
344		extent_block_number );
345
346		libcnotify_printf(
347		"%s: extent: %d number of blocks\t\t: %" PRIu32 "\n",
348		function,
349		extent_index,
350		extent_number_of_blocks );
351		}
352		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
353
354	224k	fork_descriptor->extents[ extent_index ][ 0 ] = extent_block_number;
355	224k	fork_descriptor->extents[ extent_index ][ 1 ] = extent_number_of_blocks;
356
357	224k	fork_descriptor->number_of_blocks_in_extents += extent_number_of_blocks;
358
359	224k	extent_index++;
360	224k	}
361		#if defined( HAVE_DEBUG_OUTPUT )
362		if( libcnotify_verbose != 0 )
363		{
364		libcnotify_printf(
365		"\n" );
366		}
367		#endif
368	28.0k	return( 1 );
369	28.0k	}
370
371		/* Determines if the fork has extents in the extents (overflow) file.
372		* Returns 1 if the fork has extents in the extents (overflow) file, 0 if not or -1 on error
373		*/
374		int libfshfs_fork_descriptor_has_extents_overflow(
375		libfshfs_fork_descriptor_t *fork_descriptor,
376		libcerror_error_t **error )
377	13.3k	{
378	13.3k	static char *function = "libfshfs_fork_descriptor_has_extents_overflow";
379
380	13.3k	if( fork_descriptor == NULL )
381	0	{
382	0	libcerror_error_set(
383	0	error,
384	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
385	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
386	0	"%s: invalid fork descriptor.",
387	0	function );
388
389	0	return( -1 );
390	0	}
391	13.3k	if( fork_descriptor->number_of_blocks_in_extents < fork_descriptor->number_of_blocks )
392	2.63k	{
393	2.63k	return( 1 );
394	2.63k	}
395	10.7k	return( 0 );
396	13.3k	}
397
398		/* Retrieves the extents
399		* Returns 1 if successful or -1 on error
400		*/
401		int libfshfs_fork_descriptor_get_extents(
402		libfshfs_fork_descriptor_t *fork_descriptor,
403		libcdata_array_t *extents,
404		libcerror_error_t **error )
405	12.9k	{
406	12.9k	libfshfs_extent_t *extent = NULL;
407	12.9k	static char *function = "libfshfs_fork_descriptor_get_extents";
408	12.9k	uint32_t extent_block_number = 0;
409	12.9k	uint32_t extent_number_of_blocks = 0;
410	12.9k	int entry_index = 0;
411	12.9k	int extent_index = 0;
412
413	12.9k	if( fork_descriptor == NULL )
414	0	{
415	0	libcerror_error_set(
416	0	error,
417	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
418	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
419	0	"%s: invalid fork descriptor.",
420	0	function );
421
422	0	return( -1 );
423	0	}
424	12.9k	for( extent_index = 0;
425	62.8k	extent_index < 8;
426	49.8k	extent_index++ )
427	59.6k	{
428	59.6k	extent_block_number = fork_descriptor->extents[ extent_index ][ 0 ];
429	59.6k	extent_number_of_blocks = fork_descriptor->extents[ extent_index ][ 1 ];
430
431	59.6k	if( ( extent_block_number == 0 )
432	52.4k	\|\| ( extent_number_of_blocks == 0 ) )
433	9.70k	{
434	9.70k	break;
435	9.70k	}
436	49.8k	if( libfshfs_extent_initialize(
437	49.8k	&extent,
438	49.8k	error ) != 1 )
439	0	{
440	0	libcerror_error_set(
441	0	error,
442	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
443	0	LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
444	0	"%s: unable to create extent.",
445	0	function );
446
447	0	goto on_error;
448	0	}
449	49.8k	extent->block_number = extent_block_number;
450	49.8k	extent->number_of_blocks = extent_number_of_blocks;
451
452	49.8k	if( libcdata_array_append_entry(
453	49.8k	extents,
454	49.8k	&entry_index,
455	49.8k	(intptr_t *) extent,
456	49.8k	error ) != 1 )
457	0	{
458	0	libcerror_error_set(
459	0	error,
460	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
461	0	LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,
462	0	"%s: unable to append extent to array.",
463	0	function );
464
465	0	goto on_error;
466	0	}
467	49.8k	extent = NULL;
468	49.8k	}
469	12.9k	return( 1 );
470
471	0	on_error:
472	0	if( extent != NULL )
473	0	{
474	0	libfshfs_extent_free(
475	0	&extent,
476	0	NULL );
477	0	}
478	0	libcdata_array_empty(
479	0	extents,
480	0	(int ()(intptr_t , libcerror_error_t *)) &libfshfs_extent_free,
481	0	NULL );
482
483	0	return( -1 );
484	12.9k	}
485