/src/libagdb/libagdb/libagdb_io_handle.c

Source
/*
 * Input/Output (IO) handle functions
 *
 * Copyright (C) 2014-2026, 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 "libagdb_debug.h"
#include "libagdb_definitions.h"
#include "libagdb_io_handle.h"
#include "libagdb_libbfio.h"
#include "libagdb_libcerror.h"
#include "libagdb_libcnotify.h"
#include "libagdb_libfcache.h"
#include "libagdb_libfdata.h"
#include "libagdb_unused.h"

const char *agdb_mem_file_signature_vista  = "MEMO";
const char *agdb_mem_file_signature_win7   = "MEM0";
const char *agdb_mem_file_signature_win8_0 = "MEM\xb0";
const char *agdb_mam_file_signature_win8_1 = "MAM\x84";

/* Creates an IO handle
 * Make sure the value io_handle is referencing, is set to NULL
 * Returns 1 if successful or -1 on error
 */
int libagdb_io_handle_initialize(
     libagdb_io_handle_t **io_handle,
     libcerror_error_t **error )
{
  static char *function = "libagdb_io_handle_initialize";

  if( io_handle == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid IO handle.",
     function );

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

    return( -1 );
  }
  *io_handle = memory_allocate_structure(
                libagdb_io_handle_t );

  if( *io_handle == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
     "%s: unable to create IO handle.",
     function );

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

    goto on_error;
  }
  return( 1 );

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

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

/* Frees a IO handle
 * Returns 1 if successful or -1 on error
 */
int libagdb_io_handle_free(
     libagdb_io_handle_t **io_handle,
     libcerror_error_t **error )
{
  static char *function = "libagdb_io_handle_free";

  if( io_handle == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid IO handle.",
     function );

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

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

/* Clears the IO handle
 * Returns 1 if successful or -1 on error
 */
int libagdb_io_handle_clear(
     libagdb_io_handle_t *io_handle,
     libcerror_error_t **error )
{
  static char *function = "libagdb_io_handle_clear";

  if( io_handle == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid IO handle.",
     function );

    return( -1 );
  }
  if( memory_set(
       io_handle,
       0,
       sizeof( libagdb_io_handle_t ) ) == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_SET_FAILED,
     "%s: unable to clear IO handle.",
     function );

    return( -1 );
  }
  return( 1 );
}

/* Reads the compressed blocks
 * Returns 1 if successful or -1 on error
 */
int libagdb_io_handle_read_compressed_blocks(
     libagdb_io_handle_t *io_handle,
     libbfio_handle_t *file_io_handle,
     libfdata_list_t *compressed_blocks_list,
     libcerror_error_t **error )
{
  uint8_t compressed_block_data[ 4 ];

  static char *function            = "libagdb_io_handle_read_compressed_blocks";
  off64_t file_offset              = 0;
  size_t read_size                 = 0;
  ssize_t read_count               = 0;
  uint32_t compressed_block_size   = 0;
  uint32_t uncompressed_data_size  = 0;
  uint32_t uncompressed_block_size = 0;
  int compressed_block_index       = 0;
  int element_index                = 0;

  if( io_handle == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid IO handle.",
     function );

    return( -1 );
  }
  if( ( io_handle->file_type != LIBAGDB_FILE_TYPE_COMPRESSED_VISTA )
   && ( io_handle->file_type != LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS7 )
   && ( io_handle->file_type != LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_0 )
   && ( io_handle->file_type != LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_1 ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
     "%s: invalid IO handle - unsupported file type.",
     function );

    return( -1 );
  }
  if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_VISTA )
  {
    file_offset = 8;
    read_size   = 2;
  }
  else if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS7 )
  {
    file_offset = 8;
    read_size   = 4;
  }
  else if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_0 )
  {
    file_offset = 12;
    read_size   = 4;
  }
  else if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_1 )
  {
    file_offset = 12;
    read_size   = 4;
  }
  uncompressed_data_size = io_handle->uncompressed_data_size;

  while( (size64_t) file_offset < io_handle->file_size )
  {
#if defined( HAVE_DEBUG_OUTPUT )
    if( libcnotify_verbose != 0 )
    {
      libcnotify_printf(
       "%s: reading compressed data block at offset: %" PRIi64 " (0x%08" PRIx64 ")\n",
       function,
       file_offset,
       file_offset );
    }
#endif
    read_count = libbfio_handle_read_buffer_at_offset(
                  file_io_handle,
                  compressed_block_data,
                  read_size,
                  file_offset,
                  error );

    if( read_count != (ssize_t) read_size )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_IO,
       LIBCERROR_IO_ERROR_READ_FAILED,
       "%s: unable to read compressed block data at offset: %" PRIi64 " (0x%08" PRIx64 ").",
       function,
       file_offset,
       file_offset );

      return( -1 );
    }
    if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_VISTA )
    {
      byte_stream_copy_to_uint16_little_endian(
       compressed_block_data,
       compressed_block_size );

      compressed_block_size &= 0x0fff;

      if( compressed_block_size == 0 )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
         "%s: invalid compressed block size value out of bounds.",
         function );

        return( -1 );
      }
      compressed_block_size += 3;

      uncompressed_block_size = io_handle->uncompressed_block_size;
    }
    else if( ( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS7 )
          || ( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_0 ) )
    {
      byte_stream_copy_to_uint32_little_endian(
       compressed_block_data,
       compressed_block_size );

      file_offset += 4;

      uncompressed_block_size = io_handle->uncompressed_block_size;
    }
    else if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_1 )
    {
      if( io_handle->file_size > (size64_t) UINT32_MAX )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
         "%s: invalid compressed block size value out of bounds.",
         function );

        return( -1 );
      }
      compressed_block_size = (uint32_t) io_handle->file_size - 12;

      if( ( uncompressed_data_size % io_handle->uncompressed_block_size ) != 0 )
      {
        uncompressed_data_size /= io_handle->uncompressed_block_size;
        uncompressed_data_size += 1;
        uncompressed_data_size *= io_handle->uncompressed_block_size;
      }
      uncompressed_block_size = uncompressed_data_size;
    }
    if( uncompressed_data_size < uncompressed_block_size )
    {
      uncompressed_block_size = uncompressed_data_size;
    }
    else
    {
      uncompressed_block_size = uncompressed_block_size;
    }
#if defined( HAVE_DEBUG_OUTPUT )
    if( libcnotify_verbose != 0 )
    {
      libcnotify_printf(
       "%s: compressed block: %d size\t: %" PRIu32 "\n",
       function,
       compressed_block_index,
       compressed_block_size );
    }
#endif
    if( compressed_block_size == 0 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
       "%s: invalid compressed block size value out of bounds.",
       function );

      return( -1 );
    }
    if( libfdata_list_append_element_with_mapped_size(
         compressed_blocks_list,
         &element_index,
         0,
         file_offset,
         (size64_t) compressed_block_size,
         LIBFDATA_RANGE_FLAG_IS_COMPRESSED,
         uncompressed_block_size,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,
       "%s: unable to append compressed block: %d to list.",
       function,
       compressed_block_index );

      return( -1 );
    }
    file_offset            += compressed_block_size;
    uncompressed_data_size -= uncompressed_block_size;

    if( uncompressed_data_size == 0 )
    {
      break;
    }
    compressed_block_index++;
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    if( (size64_t) file_offset < io_handle->file_size )
    {
      libcnotify_printf(
       "%s: trailing data size\t: %" PRIu64 "\n",
       function,
       io_handle->file_size - (size64_t) file_offset );
    }
  }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  return( 1 );
}

/* Reads data from the current offset into a buffer
 * Callback for the uncompressed block stream
 * Returns the number of bytes read or -1 on error
 */
ssize_t libagdb_io_handle_read_segment_data(
         intptr_t *data_handle LIBAGDB_ATTRIBUTE_UNUSED,
         intptr_t *file_io_handle,
         int segment_index,
         int segment_file_index LIBAGDB_ATTRIBUTE_UNUSED,
         uint8_t *segment_data,
         size_t segment_data_size,
         uint32_t segment_flags LIBAGDB_ATTRIBUTE_UNUSED,
         uint8_t read_flags LIBAGDB_ATTRIBUTE_UNUSED,
         libcerror_error_t **error )
{
  static char *function = "libagdb_io_handle_read_segment_data";
  ssize_t read_count    = 0;

  LIBAGDB_UNREFERENCED_PARAMETER( data_handle )
  LIBAGDB_UNREFERENCED_PARAMETER( segment_file_index )
  LIBAGDB_UNREFERENCED_PARAMETER( segment_flags )
  LIBAGDB_UNREFERENCED_PARAMETER( read_flags )

  if( segment_data_size > (size64_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid segment data size value out of bounds.",
     function );

    return( -1 );
  }
  read_count = libbfio_handle_read_buffer(
                (libbfio_handle_t *) file_io_handle,
                segment_data,
                segment_data_size,
                error );

  if( read_count != (ssize_t) segment_data_size )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_READ_FAILED,
     "%s: unable to read segment: %d data.",
     function,
     segment_index );

    return( -1 );
  }
  return( read_count );
}

/* Seeks a certain offset of the data
 * Callback for the uncompressed block stream
 * Returns the offset if seek is successful or -1 on error
 */
off64_t libagdb_io_handle_seek_segment_offset(
         intptr_t *data_handle LIBAGDB_ATTRIBUTE_UNUSED,
         intptr_t *file_io_handle,
         int segment_index,
         int segment_file_index LIBAGDB_ATTRIBUTE_UNUSED,
         off64_t segment_offset,
         libcerror_error_t **error )
{
  static char *function = "libagdb_io_handle_seek_segment_offset";

  LIBAGDB_UNREFERENCED_PARAMETER( data_handle )
  LIBAGDB_UNREFERENCED_PARAMETER( segment_file_index )

  if( libbfio_handle_seek_offset(
       (libbfio_handle_t *) file_io_handle,
       segment_offset,
       SEEK_SET,
       error ) == -1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_SEEK_FAILED,
     "%s: unable to seek segment: %d offset: %" PRIi64 ".",
     function,
     segment_index,
     segment_offset );

    return( -1 );
  }
  return( segment_offset );
}


Coverage Report

Created: 2026-10-22 07:28

Line	Count	Source
1		/*
2		* Input/Output (IO) handle functions
3		*
4		* Copyright (C) 2014-2026, 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 "libagdb_debug.h"
28		#include "libagdb_definitions.h"
29		#include "libagdb_io_handle.h"
30		#include "libagdb_libbfio.h"
31		#include "libagdb_libcerror.h"
32		#include "libagdb_libcnotify.h"
33		#include "libagdb_libfcache.h"
34		#include "libagdb_libfdata.h"
35		#include "libagdb_unused.h"
36
37		const char *agdb_mem_file_signature_vista = "MEMO";
38		const char *agdb_mem_file_signature_win7 = "MEM0";
39		const char *agdb_mem_file_signature_win8_0 = "MEM\xb0";
40		const char *agdb_mam_file_signature_win8_1 = "MAM\x84";
41
42		/* Creates an IO handle
43		* Make sure the value io_handle is referencing, is set to NULL
44		* Returns 1 if successful or -1 on error
45		*/
46		int libagdb_io_handle_initialize(
47		libagdb_io_handle_t **io_handle,
48		libcerror_error_t **error )
49	2.45k	{
50	2.45k	static char *function = "libagdb_io_handle_initialize";
51
52	2.45k	if( io_handle == NULL )
53	0	{
54	0	libcerror_error_set(
55	0	error,
56	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
57	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
58	0	"%s: invalid IO handle.",
59	0	function );
60
61	0	return( -1 );
62	0	}
63	2.45k	if( *io_handle != NULL )
64	0	{
65	0	libcerror_error_set(
66	0	error,
67	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
68	0	LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
69	0	"%s: invalid IO handle value already set.",
70	0	function );
71
72	0	return( -1 );
73	0	}
74	2.45k	*io_handle = memory_allocate_structure(
75	2.45k	libagdb_io_handle_t );
76
77	2.45k	if( *io_handle == NULL )
78	0	{
79	0	libcerror_error_set(
80	0	error,
81	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
82	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
83	0	"%s: unable to create IO handle.",
84	0	function );
85
86	0	goto on_error;
87	0	}
88	2.45k	if( memory_set(
89	2.45k	*io_handle,
90	2.45k	0,
91	2.45k	sizeof( libagdb_io_handle_t ) ) == NULL )
92	0	{
93	0	libcerror_error_set(
94	0	error,
95	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
96	0	LIBCERROR_MEMORY_ERROR_SET_FAILED,
97	0	"%s: unable to clear file.",
98	0	function );
99
100	0	goto on_error;
101	0	}
102	2.45k	return( 1 );
103
104	0	on_error:
105	0	if( *io_handle != NULL )
106	0	{
107	0	memory_free(
108	0	*io_handle );
109
110	0	*io_handle = NULL;
111	0	}
112	0	return( -1 );
113	2.45k	}
114
115		/* Frees a IO handle
116		* Returns 1 if successful or -1 on error
117		*/
118		int libagdb_io_handle_free(
119		libagdb_io_handle_t **io_handle,
120		libcerror_error_t **error )
121	2.45k	{
122	2.45k	static char *function = "libagdb_io_handle_free";
123
124	2.45k	if( io_handle == NULL )
125	0	{
126	0	libcerror_error_set(
127	0	error,
128	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
129	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
130	0	"%s: invalid IO handle.",
131	0	function );
132
133	0	return( -1 );
134	0	}
135	2.45k	if( *io_handle != NULL )
136	2.45k	{
137	2.45k	memory_free(
138	2.45k	*io_handle );
139
140	2.45k	*io_handle = NULL;
141	2.45k	}
142	2.45k	return( 1 );
143	2.45k	}
144
145		/* Clears the IO handle
146		* Returns 1 if successful or -1 on error
147		*/
148		int libagdb_io_handle_clear(
149		libagdb_io_handle_t *io_handle,
150		libcerror_error_t **error )
151	28	{
152	28	static char *function = "libagdb_io_handle_clear";
153
154	28	if( io_handle == NULL )
155	0	{
156	0	libcerror_error_set(
157	0	error,
158	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
159	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
160	0	"%s: invalid IO handle.",
161	0	function );
162
163	0	return( -1 );
164	0	}
165	28	if( memory_set(
166	28	io_handle,
167	28	0,
168	28	sizeof( libagdb_io_handle_t ) ) == NULL )
169	0	{
170	0	libcerror_error_set(
171	0	error,
172	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
173	0	LIBCERROR_MEMORY_ERROR_SET_FAILED,
174	0	"%s: unable to clear IO handle.",
175	0	function );
176
177	0	return( -1 );
178	0	}
179	28	return( 1 );
180	28	}
181
182		/* Reads the compressed blocks
183		* Returns 1 if successful or -1 on error
184		*/
185		int libagdb_io_handle_read_compressed_blocks(
186		libagdb_io_handle_t *io_handle,
187		libbfio_handle_t *file_io_handle,
188		libfdata_list_t *compressed_blocks_list,
189		libcerror_error_t **error )
190	1.24k	{
191	1.24k	uint8_t compressed_block_data[ 4 ];
192
193	1.24k	static char *function = "libagdb_io_handle_read_compressed_blocks";
194	1.24k	off64_t file_offset = 0;
195	1.24k	size_t read_size = 0;
196	1.24k	ssize_t read_count = 0;
197	1.24k	uint32_t compressed_block_size = 0;
198	1.24k	uint32_t uncompressed_data_size = 0;
199	1.24k	uint32_t uncompressed_block_size = 0;
200	1.24k	int compressed_block_index = 0;
201	1.24k	int element_index = 0;
202
203	1.24k	if( io_handle == NULL )
204	0	{
205	0	libcerror_error_set(
206	0	error,
207	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
208	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
209	0	"%s: invalid IO handle.",
210	0	function );
211
212	0	return( -1 );
213	0	}
214	1.24k	if( ( io_handle->file_type != LIBAGDB_FILE_TYPE_COMPRESSED_VISTA )
215	658	&& ( io_handle->file_type != LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS7 )
216	270	&& ( io_handle->file_type != LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_0 )
217	257	&& ( io_handle->file_type != LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_1 ) )
218	0	{
219	0	libcerror_error_set(
220	0	error,
221	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
222	0	LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
223	0	"%s: invalid IO handle - unsupported file type.",
224	0	function );
225
226	0	return( -1 );
227	0	}
228	1.24k	if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_VISTA )
229	586	{
230	586	file_offset = 8;
231	586	read_size = 2;
232	586	}
233	658	else if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS7 )
234	388	{
235	388	file_offset = 8;
236	388	read_size = 4;
237	388	}
238	270	else if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_0 )
239	13	{
240	13	file_offset = 12;
241	13	read_size = 4;
242	13	}
243	257	else if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_1 )
244	257	{
245	257	file_offset = 12;
246	257	read_size = 4;
247	257	}
248	1.24k	uncompressed_data_size = io_handle->uncompressed_data_size;
249
250	1.57M	while( (size64_t) file_offset < io_handle->file_size )
251	1.57M	{
252		#if defined( HAVE_DEBUG_OUTPUT )
253		if( libcnotify_verbose != 0 )
254		{
255		libcnotify_printf(
256		"%s: reading compressed data block at offset: %" PRIi64 " (0x%08" PRIx64 ")\n",
257		function,
258		file_offset,
259		file_offset );
260		}
261		#endif
262	1.57M	read_count = libbfio_handle_read_buffer_at_offset(
263	1.57M	file_io_handle,
264	1.57M	compressed_block_data,
265	1.57M	read_size,
266	1.57M	file_offset,
267	1.57M	error );
268
269	1.57M	if( read_count != (ssize_t) read_size )
270	30	{
271	30	libcerror_error_set(
272	30	error,
273	30	LIBCERROR_ERROR_DOMAIN_IO,
274	30	LIBCERROR_IO_ERROR_READ_FAILED,
275	30	"%s: unable to read compressed block data at offset: %" PRIi64 " (0x%08" PRIx64 ").",
276	30	function,
277	30	file_offset,
278	30	file_offset );
279
280	30	return( -1 );
281	30	}
282	1.57M	if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_VISTA )
283	1.57M	{
284	1.57M	byte_stream_copy_to_uint16_little_endian(
285	1.57M	compressed_block_data,
286	1.57M	compressed_block_size );
287
288	1.57M	compressed_block_size &= 0x0fff;
289
290	1.57M	if( compressed_block_size == 0 )
291	6	{
292	6	libcerror_error_set(
293	6	error,
294	6	LIBCERROR_ERROR_DOMAIN_RUNTIME,
295	6	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
296	6	"%s: invalid compressed block size value out of bounds.",
297	6	function );
298
299	6	return( -1 );
300	6	}
301	1.57M	compressed_block_size += 3;
302
303	1.57M	uncompressed_block_size = io_handle->uncompressed_block_size;
304	1.57M	}
305	3.59k	else if( ( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS7 )
306	475	\|\| ( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_0 ) )
307	3.33k	{
308	3.33k	byte_stream_copy_to_uint32_little_endian(
309	3.33k	compressed_block_data,
310	3.33k	compressed_block_size );
311
312	3.33k	file_offset += 4;
313
314	3.33k	uncompressed_block_size = io_handle->uncompressed_block_size;
315	3.33k	}
316	255	else if( io_handle->file_type == LIBAGDB_FILE_TYPE_COMPRESSED_WINDOWS8_1 )
317	255	{
318	255	if( io_handle->file_size > (size64_t) UINT32_MAX )
319	0	{
320	0	libcerror_error_set(
321	0	error,
322	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
323	0	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
324	0	"%s: invalid compressed block size value out of bounds.",
325	0	function );
326
327	0	return( -1 );
328	0	}
329	255	compressed_block_size = (uint32_t) io_handle->file_size - 12;
330
331	255	if( ( uncompressed_data_size % io_handle->uncompressed_block_size ) != 0 )
332	254	{
333	254	uncompressed_data_size /= io_handle->uncompressed_block_size;
334	254	uncompressed_data_size += 1;
335	254	uncompressed_data_size *= io_handle->uncompressed_block_size;
336	254	}
337	255	uncompressed_block_size = uncompressed_data_size;
338	255	}
339	1.57M	if( uncompressed_data_size < uncompressed_block_size )
340	233	{
341	233	uncompressed_block_size = uncompressed_data_size;
342	233	}
343	1.57M	else
344	1.57M	{
345	1.57M	uncompressed_block_size = uncompressed_block_size;
346	1.57M	}
347		#if defined( HAVE_DEBUG_OUTPUT )
348		if( libcnotify_verbose != 0 )
349		{
350		libcnotify_printf(
351		"%s: compressed block: %d size\t: %" PRIu32 "\n",
352		function,
353		compressed_block_index,
354		compressed_block_size );
355		}
356		#endif
357	1.57M	if( compressed_block_size == 0 )
358	2	{
359	2	libcerror_error_set(
360	2	error,
361	2	LIBCERROR_ERROR_DOMAIN_RUNTIME,
362	2	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
363	2	"%s: invalid compressed block size value out of bounds.",
364	2	function );
365
366	2	return( -1 );
367	2	}
368	1.57M	if( libfdata_list_append_element_with_mapped_size(
369	1.57M	compressed_blocks_list,
370	1.57M	&element_index,
371	1.57M	0,
372	1.57M	file_offset,
373	1.57M	(size64_t) compressed_block_size,
374	1.57M	LIBFDATA_RANGE_FLAG_IS_COMPRESSED,
375	1.57M	uncompressed_block_size,
376	1.57M	error ) != 1 )
377	0	{
378	0	libcerror_error_set(
379	0	error,
380	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
381	0	LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,
382	0	"%s: unable to append compressed block: %d to list.",
383	0	function,
384	0	compressed_block_index );
385
386	0	return( -1 );
387	0	}
388	1.57M	file_offset += compressed_block_size;
389	1.57M	uncompressed_data_size -= uncompressed_block_size;
390
391	1.57M	if( uncompressed_data_size == 0 )
392	488	{
393	488	break;
394	488	}
395	1.57M	compressed_block_index++;
396	1.57M	}
397		#if defined( HAVE_DEBUG_OUTPUT )
398		if( libcnotify_verbose != 0 )
399		{
400		if( (size64_t) file_offset < io_handle->file_size )
401		{
402		libcnotify_printf(
403		"%s: trailing data size\t: %" PRIu64 "\n",
404		function,
405		io_handle->file_size - (size64_t) file_offset );
406		}
407		}
408		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
409
410	1.20k	return( 1 );
411	1.24k	}
412
413		/* Reads data from the current offset into a buffer
414		* Callback for the uncompressed block stream
415		* Returns the number of bytes read or -1 on error
416		*/
417		ssize_t libagdb_io_handle_read_segment_data(
418		intptr_t *data_handle LIBAGDB_ATTRIBUTE_UNUSED,
419		intptr_t *file_io_handle,
420		int segment_index,
421		int segment_file_index LIBAGDB_ATTRIBUTE_UNUSED,
422		uint8_t *segment_data,
423		size_t segment_data_size,
424		uint32_t segment_flags LIBAGDB_ATTRIBUTE_UNUSED,
425		uint8_t read_flags LIBAGDB_ATTRIBUTE_UNUSED,
426		libcerror_error_t **error )
427	169k	{
428	169k	static char *function = "libagdb_io_handle_read_segment_data";
429	169k	ssize_t read_count = 0;
430
431	169k	LIBAGDB_UNREFERENCED_PARAMETER( data_handle )
432	169k	LIBAGDB_UNREFERENCED_PARAMETER( segment_file_index )
433	169k	LIBAGDB_UNREFERENCED_PARAMETER( segment_flags )
434	169k	LIBAGDB_UNREFERENCED_PARAMETER( read_flags )
435
436	169k	if( segment_data_size > (size64_t) SSIZE_MAX )
437	0	{
438	0	libcerror_error_set(
439	0	error,
440	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
441	0	LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
442	0	"%s: invalid segment data size value out of bounds.",
443	0	function );
444
445	0	return( -1 );
446	0	}
447	169k	read_count = libbfio_handle_read_buffer(
448	169k	(libbfio_handle_t *) file_io_handle,
449	169k	segment_data,
450	169k	segment_data_size,
451	169k	error );
452
453	169k	if( read_count != (ssize_t) segment_data_size )
454	430	{
455	430	libcerror_error_set(
456	430	error,
457	430	LIBCERROR_ERROR_DOMAIN_IO,
458	430	LIBCERROR_IO_ERROR_READ_FAILED,
459	430	"%s: unable to read segment: %d data.",
460	430	function,
461	430	segment_index );
462
463	430	return( -1 );
464	430	}
465	169k	return( read_count );
466	169k	}
467
468		/* Seeks a certain offset of the data
469		* Callback for the uncompressed block stream
470		* Returns the offset if seek is successful or -1 on error
471		*/
472		off64_t libagdb_io_handle_seek_segment_offset(
473		intptr_t *data_handle LIBAGDB_ATTRIBUTE_UNUSED,
474		intptr_t *file_io_handle,
475		int segment_index,
476		int segment_file_index LIBAGDB_ATTRIBUTE_UNUSED,
477		off64_t segment_offset,
478		libcerror_error_t **error )
479	169k	{
480	169k	static char *function = "libagdb_io_handle_seek_segment_offset";
481
482	169k	LIBAGDB_UNREFERENCED_PARAMETER( data_handle )
483	169k	LIBAGDB_UNREFERENCED_PARAMETER( segment_file_index )
484
485	169k	if( libbfio_handle_seek_offset(
486	169k	(libbfio_handle_t *) file_io_handle,
487	169k	segment_offset,
488	169k	SEEK_SET,
489	169k	error ) == -1 )
490	0	{
491	0	libcerror_error_set(
492	0	error,
493	0	LIBCERROR_ERROR_DOMAIN_IO,
494	0	LIBCERROR_IO_ERROR_SEEK_FAILED,
495	0	"%s: unable to seek segment: %d offset: %" PRIi64 ".",
496	0	function,
497	0	segment_index,
498	0	segment_offset );
499
500	0	return( -1 );
501	0	}
502	169k	return( segment_offset );
503	169k	}
504