/*
 * Mount file entry
 *
 * Copyright (C) 2012-2021, 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 <memory.h>
#include <narrow_string.h>
#include <system_string.h>
#include <types.h>
#include <wide_string.h>

#if defined( HAVE_SYS_STAT_H )
#include <sys/stat.h>
#endif

#include "mount_file_entry.h"
#include "mount_file_system.h"
#include "vhditools_libcerror.h"
#include "vhditools_libvhdi.h"

#if !defined( S_IFDIR )
#define S_IFDIR 0x4000
#endif

#if !defined( S_IFREG )
#define S_IFREG 0x8000
#endif

/* Creates a file entry
 * Make sure the value file_entry is referencing, is set to NULL
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_initialize(
     mount_file_entry_t **file_entry,
     mount_file_system_t *file_system,
     const system_character_t *name,
     size_t name_length,
     libvhdi_file_t *vhdi_file,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_initialize";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

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

		return( -1 );
	}
	if( file_system == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file system.",
		 function );

		return( -1 );
	}
	if( name_length > (size_t) ( SSIZE_MAX - 1 ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid name length value exceeds maximum.",
		 function );

		return( -1 );
	}
	*file_entry = memory_allocate_structure(
	               mount_file_entry_t );

	if( *file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_MEMORY,
		 LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
		 "%s: unable to create file entry.",
		 function );

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

		memory_free(
		 *file_entry );

		*file_entry = NULL;

		return( -1 );
	}
	( *file_entry )->file_system = file_system;

	if( name != NULL )
	{
		( *file_entry )->name = system_string_allocate(
		                         name_length + 1 );

		if( ( *file_entry )->name == NULL )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_MEMORY,
			 LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
			 "%s: unable to create name string.",
			 function );

			goto on_error;
		}
		if( name_length > 0 )
		{
			if( system_string_copy(
			     ( *file_entry )->name,
			     name,
			     name_length ) == NULL )
			{
				libcerror_error_set(
				 error,
				 LIBCERROR_ERROR_DOMAIN_RUNTIME,
				 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
				 "%s: unable to copy name.",
				 function );

				goto on_error;
			}
		}
		( *file_entry )->name[ name_length ] = 0;

		( *file_entry )->name_size = name_length + 1;
	}
	( *file_entry )->vhdi_file = vhdi_file;

	return( 1 );

on_error:
	if( *file_entry != NULL )
	{
		if( ( *file_entry )->name != NULL )
		{
			memory_free(
			 ( *file_entry )->name );
		}
		memory_free(
		 *file_entry );

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

/* Frees a file entry
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_free(
     mount_file_entry_t **file_entry,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_free";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( *file_entry != NULL )
	{
		if( ( *file_entry )->name != NULL )
		{
			memory_free(
			 ( *file_entry )->name );
		}
		memory_free(
		 *file_entry );

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

/* Retrieves the parent file entry
 * Returns 1 if successful, 0 if no such file entry or -1 on error
 */
int mount_file_entry_get_parent_file_entry(
     mount_file_entry_t *file_entry,
     mount_file_entry_t **parent_file_entry,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_parent_file_entry";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( parent_file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid parent file entry.",
		 function );

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

		return( -1 );
	}
	if( file_entry->vhdi_file != NULL )
	{
		if( mount_file_entry_initialize(
		     parent_file_entry,
		     file_entry->file_system,
		     _SYSTEM_STRING( "" ),
		     0,
		     NULL,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_RUNTIME,
			 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
			 "%s: unable to initialize parent file entry.",
			 function );

			return( -1 );
		}
		return( 1 );
	}
	return( 0 );
}

/* Retrieves the creation date and time
 * On Windows the timestamp is an unsigned 64-bit FILETIME timestamp
 * otherwise the timestamp is a signed 64-bit POSIX date and time value in number of nanoseconds
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_creation_time(
     mount_file_entry_t *file_entry,
     uint64_t *creation_time,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_creation_time";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( mount_file_system_get_mounted_timestamp(
	     file_entry->file_system,
	     creation_time,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve mounted timestamp.",
		 function );

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

/* Retrieves the access date and time
 * On Windows the timestamp is an unsigned 64-bit FILETIME timestamp
 * otherwise the timestamp is a signed 64-bit POSIX date and time value in number of nanoseconds
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_access_time(
     mount_file_entry_t *file_entry,
     uint64_t *access_time,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_access_time";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( mount_file_system_get_mounted_timestamp(
	     file_entry->file_system,
	     access_time,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve mounted timestamp.",
		 function );

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

/* Retrieves the modification date and time
 * On Windows the timestamp is an unsigned 64-bit FILETIME timestamp
 * otherwise the timestamp is a signed 64-bit POSIX date and time value in number of nanoseconds
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_modification_time(
     mount_file_entry_t *file_entry,
     uint64_t *modification_time,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_modification_time";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( mount_file_system_get_mounted_timestamp(
	     file_entry->file_system,
	     modification_time,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve mounted timestamp.",
		 function );

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

/* Retrieves the inode change date and time
 * On Windows the timestamp is an unsigned 64-bit FILETIME timestamp
 * otherwise the timestamp is a signed 64-bit POSIX date and time value in number of nanoseconds
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_inode_change_time(
     mount_file_entry_t *file_entry,
     uint64_t *inode_change_time,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_inode_change_time";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( mount_file_system_get_mounted_timestamp(
	     file_entry->file_system,
	     inode_change_time,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve mounted timestamp.",
		 function );

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

/* Retrieves the file mode
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_file_mode(
     mount_file_entry_t *file_entry,
     uint16_t *file_mode,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_file_mode";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( file_mode == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file mode.",
		 function );

		return( -1 );
	}
	if( file_entry->vhdi_file == NULL )
	{
		*file_mode = S_IFDIR | 0555;
	}
	else
	{
		*file_mode = S_IFREG | 0444;
	}
	return( 1 );
}

/* Retrieves the size of the name
 * The returned size includes the end of string character
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_name_size(
     mount_file_entry_t *file_entry,
     size_t *string_size,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_name_size";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( string_size == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid string size.",
		 function );

		return( -1 );
	}
	*string_size = file_entry->name_size;

	return( 1 );
}

/* Retrieves the name
 * The size should include the end of string character
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_name(
     mount_file_entry_t *file_entry,
     system_character_t *string,
     size_t string_size,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_name";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( file_entry->name == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid file entry - missing name.",
		 function );

		return( -1 );
	}
	if( string == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid string.",
		 function );

		return( -1 );
	}
	if( string_size > (size_t) SSIZE_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid string size value exceeds maximum.",
		 function );

		return( -1 );
	}
	if( string_size < file_entry->name_size )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
		 "%s: invalid string size value too small.",
		 function );

		return( -1 );
	}
	if( system_string_copy(
	     string,
	     file_entry->name,
	     file_entry->name_size ) == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_COPY_FAILED,
		 "%s: unable to copy name.",
		 function );

		return( -1 );
	}
	string[ file_entry->name_size - 1 ] = 0;

	return( 1 );
}

/* Retrieves the number of sub file entries
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_number_of_sub_file_entries(
     mount_file_entry_t *file_entry,
     int *number_of_sub_file_entries,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_number_of_sub_file_entries";
	int number_of_files   = 0;

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( number_of_sub_file_entries == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid number of sub file entries.",
		 function );

		return( -1 );
	}
	if( file_entry->vhdi_file == NULL )
	{
		if( mount_file_system_get_number_of_files(
		     file_entry->file_system,
		     &number_of_files,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_RUNTIME,
			 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
			 "%s: unable to retrieve number of files.",
			 function );

			return( -1 );
		}
		if( ( number_of_files < 0 )
		 || ( number_of_files > 99 ) )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
			 LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
			 "%s: unsupported number of files.",
			 function );

			return( -1 );
		}
	}
	*number_of_sub_file_entries = number_of_files;

	return( 1 );
}

/* Retrieves the sub file entry for the specific index
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_sub_file_entry_by_index(
     mount_file_entry_t *file_entry,
     int sub_file_entry_index,
     mount_file_entry_t **sub_file_entry,
     libcerror_error_t **error )
{
	system_character_t path[ 32 ];

	libvhdi_file_t *vhdi_file      = NULL;
	static char *function          = "mount_file_entry_get_sub_file_entry_by_index";
	size_t path_length             = 0;
	int number_of_sub_file_entries = 0;

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( sub_file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid sub file entry.",
		 function );

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

		return( -1 );
	}
	if( mount_file_entry_get_number_of_sub_file_entries(
	     file_entry,
	     &number_of_sub_file_entries,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve number of sub file entries.",
		 function );

		return( -1 );
	}
	if( ( sub_file_entry_index < 0 )
	 || ( sub_file_entry_index >= number_of_sub_file_entries ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
		 "%s: invalid sub file entry index value out of bounds.",
		 function );

		return( -1 );
	}
	if( mount_file_system_get_path_from_file_index(
	     file_entry->file_system,
	     sub_file_entry_index,
	     path,
	     32,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve path for file entry: %d.",
		 function,
		 sub_file_entry_index );

		return( -1 );
	}
	if( mount_file_system_get_file_by_index(
	     file_entry->file_system,
	     sub_file_entry_index,
	     &vhdi_file,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve file: %d from file system.",
		 function,
		 sub_file_entry_index );

		return( -1 );
	}
	if( vhdi_file == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: missing file: %d.",
		 function,
		 sub_file_entry_index );

		return( -1 );
	}
	path_length = system_string_length(
	               path );

	if( mount_file_entry_initialize(
	     sub_file_entry,
	     file_entry->file_system,
	     &( path[ 1 ] ),
	     path_length - 1,
	     vhdi_file,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
		 "%s: unable to initialize sub file entry: %d.",
		 function,
		 sub_file_entry_index );

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

/* Reads data at a specific offset
 * Returns the number of bytes read or -1 on error
 */
ssize_t mount_file_entry_read_buffer_at_offset(
         mount_file_entry_t *file_entry,
         void *buffer,
         size_t buffer_size,
         off64_t offset,
         libcerror_error_t **error )
{
	static char *function = "mount_file_entry_read_buffer_at_offset";
	ssize_t read_count    = 0;

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	read_count = libvhdi_file_read_buffer_at_offset(
	              file_entry->vhdi_file,
	              buffer,
	              buffer_size,
	              offset,
	              error );

	if( read_count < 0 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_READ_FAILED,
		 "%s: unable to read buffer at offset: %" PRIi64 " (0x%08" PRIx64 ") from file.",
		 function,
		 offset,
		 offset );

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

/* Retrieves the size
 * Returns 1 if successful or -1 on error
 */
int mount_file_entry_get_size(
     mount_file_entry_t *file_entry,
     size64_t *size,
     libcerror_error_t **error )
{
	static char *function = "mount_file_entry_get_size";

	if( file_entry == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid file entry.",
		 function );

		return( -1 );
	}
	if( file_entry->vhdi_file == NULL )
	{
		if( size == NULL )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
			 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
			 "%s: invalid size.",
			 function );

			return( -1 );
		}
		*size = 0;
	}
	else
	{
		if( libvhdi_file_get_media_size(
		     file_entry->vhdi_file,
		     size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_RUNTIME,
			 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
			 "%s: unable to retrieve media size from file.",
			 function );

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

