/*
 * File range functions
 *
 * Copyright (C) 2009-2017, Joachim Metz <joachim.metz@gmail.com>
 *
 * Refer to AUTHORS for acknowledgements.
 *
 * This software 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 software 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 software.  If not, see <http://www.gnu.org/licenses/>.
 */

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

#if defined( HAVE_UNISTD_H )
#include <unistd.h>
#endif

#include "libbfio_definitions.h"
#include "libbfio_file.h"
#include "libbfio_file_range.h"
#include "libbfio_handle.h"
#include "libbfio_libcerror.h"
#include "libbfio_types.h"

/* Creates a file range IO handle
 * Make sure the value file_range_io_handle is referencing, is set to NULL
 * Returns 1 if successful or -1 on error
 */
int libbfio_file_range_io_handle_initialize(
     libbfio_file_range_io_handle_t **file_range_io_handle,
     libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_io_handle_initialize";

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

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

		return( -1 );
	}
	*file_range_io_handle = memory_allocate_structure(
	                         libbfio_file_range_io_handle_t );

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

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

		goto on_error;
	}
	if( libbfio_file_io_handle_initialize(
	     &( ( *file_range_io_handle )->file_io_handle ),
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
		 "%s: unable to initialize file IO handle.",
		 function );

		goto on_error;
	}
	return( 1 );

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

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

/* Creates a file range handle
 * Make sure the value handle is referencing, is set to NULL
 * Returns 1 if successful or -1 on error
 */
int libbfio_file_range_initialize(
     libbfio_handle_t **handle,
     libcerror_error_t **error )
{
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_range_file_initialize";

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

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

		return( -1 );
	}
	if( libbfio_file_range_io_handle_initialize(
	     &file_range_io_handle,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
		 "%s: unable to create file range IO handle.",
		 function );

		goto on_error;
	}
	if( libbfio_handle_initialize(
	     handle,
	     (intptr_t *) file_range_io_handle,
	     (int (*)(intptr_t **, libcerror_error_t **)) libbfio_file_range_io_handle_free,
	     (int (*)(intptr_t **, intptr_t *, libcerror_error_t **)) libbfio_file_range_io_handle_clone,
	     (int (*)(intptr_t *, int, libcerror_error_t **)) libbfio_file_range_open,
	     (int (*)(intptr_t *, libcerror_error_t **)) libbfio_file_range_close,
	     (ssize_t (*)(intptr_t *, uint8_t *, size_t, libcerror_error_t **)) libbfio_file_range_read,
	     (ssize_t (*)(intptr_t *, const uint8_t *, size_t, libcerror_error_t **)) libbfio_file_range_write,
	     (off64_t (*)(intptr_t *, off64_t, int, libcerror_error_t **)) libbfio_file_range_seek_offset,
	     (int (*)(intptr_t *, libcerror_error_t **)) libbfio_file_range_exists,
	     (int (*)(intptr_t *, libcerror_error_t **)) libbfio_file_range_is_open,
	     (int (*)(intptr_t *, size64_t *, libcerror_error_t **)) libbfio_file_range_get_size,
	     LIBBFIO_FLAG_IO_HANDLE_MANAGED | LIBBFIO_FLAG_IO_HANDLE_CLONE_BY_FUNCTION,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
		 "%s: unable to create handle.",
		 function );

		goto on_error;
	}
	return( 1 );

on_error:
	if( file_range_io_handle != NULL )
	{
		libbfio_file_range_io_handle_free(
		 &file_range_io_handle,
		 NULL );
	}
	return( -1 );
}

/* Frees a file range IO handle
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_io_handle_free(
     libbfio_file_range_io_handle_t **file_range_io_handle,
     libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_io_handle_free";
	int result            = 1;

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

		return( -1 );
	}
	if( *file_range_io_handle != NULL )
	{
		if( libbfio_file_io_handle_free(
		     &( ( *file_range_io_handle )->file_io_handle ),
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_RUNTIME,
			 LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
			 "%s: unable to free file IO handle.",
			 function );

			result = -1;
		}
		memory_free(
		 *file_range_io_handle );

		*file_range_io_handle = NULL;
	}
	return( result );
}

/* Clones (duplicates) the file range IO handle and its attributes
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_io_handle_clone(
     libbfio_file_range_io_handle_t **destination_file_range_io_handle,
     libbfio_file_range_io_handle_t *source_file_range_io_handle,
     libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_io_handle_clone";

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

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

		return( -1 );
	}
	if( source_file_range_io_handle == NULL )
	{
		*destination_file_range_io_handle = NULL;

		return( 1 );
	}
	*destination_file_range_io_handle = memory_allocate_structure(
	                                     libbfio_file_range_io_handle_t );

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

		goto on_error;
	}
	if( memory_set(
	     *destination_file_range_io_handle,
	     0,
	     sizeof( libbfio_file_range_io_handle_t ) ) == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_MEMORY,
		 LIBCERROR_MEMORY_ERROR_SET_FAILED,
		 "%s: unable to clear destination file range IO handle.",
		 function );

		memory_free(
		 *destination_file_range_io_handle );

		*destination_file_range_io_handle = NULL;

		return( -1 );
	}
	if( libbfio_file_io_handle_clone(
	     &( ( *destination_file_range_io_handle )->file_io_handle ),
	     source_file_range_io_handle->file_io_handle,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
		 "%s: unable to create file IO handle.",
		 function );

		goto on_error;
	}
	( *destination_file_range_io_handle )->range_offset = source_file_range_io_handle->range_offset;
	( *destination_file_range_io_handle )->range_size   = source_file_range_io_handle->range_size;

	return( 1 );

on_error:
	if( *destination_file_range_io_handle != NULL )
	{
		libbfio_file_range_io_handle_free(
		 destination_file_range_io_handle,
		 NULL );
	}
	return( -1 );
}

/* Retrieves the name size of the file range handle
 * The name size includes the end of string character
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_get_name_size(
     libbfio_handle_t *handle,
     size_t *name_size,
     libcerror_error_t **error )
{
	libbfio_internal_handle_t *internal_handle           = NULL;
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_file_range_get_name_size";

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

		return( -1 );
	}
	internal_handle = (libbfio_internal_handle_t *) handle;

	if( internal_handle->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid handle - missing IO handle.",
		 function );

		return( -1 );
	}
	file_range_io_handle = (libbfio_file_range_io_handle_t *) internal_handle->io_handle;

	if( libbfio_file_io_handle_get_name_size(
	     file_range_io_handle->file_io_handle,
	     name_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve name size from file IO handle.",
		 function );

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

/* Retrieves the name of the file range handle
 * The name size should include the end of string character
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_get_name(
     libbfio_handle_t *handle,
     char *name,
     size_t name_size,
     libcerror_error_t **error )
{
	libbfio_internal_handle_t *internal_handle           = NULL;
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_file_range_get_name";

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

		return( -1 );
	}
	internal_handle = (libbfio_internal_handle_t *) handle;

	if( internal_handle->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid handle - missing IO handle.",
		 function );

		return( -1 );
	}
	file_range_io_handle = (libbfio_file_range_io_handle_t *) internal_handle->io_handle;

	if( libbfio_file_io_handle_get_name(
	     file_range_io_handle->file_io_handle,
	     name,
	     name_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve name from file IO handle.",
		 function );

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

/* Sets the name for the file range handle
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_set_name(
     libbfio_handle_t *handle,
     const char *name,
     size_t name_length,
     libcerror_error_t **error )
{
	libbfio_internal_handle_t *internal_handle           = NULL;
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_file_range_set_name";

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

		return( -1 );
	}
	internal_handle = (libbfio_internal_handle_t *) handle;

	if( internal_handle->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid handle - missing IO handle.",
		 function );

		return( -1 );
	}
	file_range_io_handle = (libbfio_file_range_io_handle_t *) internal_handle->io_handle;

	if( libbfio_file_io_handle_set_name(
	     file_range_io_handle->file_io_handle,
	     name,
	     name_length,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
		 "%s: unable to set name in file IO handle.",
		 function );

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

#if defined( HAVE_WIDE_CHARACTER_TYPE )

/* Retrieves the name size of the file range handle
 * The name size includes the end of string character
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_get_name_size_wide(
     libbfio_handle_t *handle,
     size_t *name_size,
     libcerror_error_t **error )
{
	libbfio_internal_handle_t *internal_handle           = NULL;
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_file_range_get_name_size_wide";

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

		return( -1 );
	}
	internal_handle = (libbfio_internal_handle_t *) handle;

	if( internal_handle->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid handle - missing IO handle.",
		 function );

		return( -1 );
	}
	file_range_io_handle = (libbfio_file_range_io_handle_t *) internal_handle->io_handle;

	if( libbfio_file_io_handle_get_name_size_wide(
	     file_range_io_handle->file_io_handle,
	     name_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve name size from file IO handle.",
		 function );

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

/* Retrieves the name of the file range handle
 * The name size should include the end of string character
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_get_name_wide(
     libbfio_handle_t *handle,
     wchar_t *name,
     size_t name_size,
     libcerror_error_t **error )
{
	libbfio_internal_handle_t *internal_handle           = NULL;
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_file_range_get_name_wide";

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

		return( -1 );
	}
	internal_handle = (libbfio_internal_handle_t *) handle;

	if( internal_handle->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid handle - missing IO handle.",
		 function );

		return( -1 );
	}
	file_range_io_handle = (libbfio_file_range_io_handle_t *) internal_handle->io_handle;

	if( libbfio_file_io_handle_get_name_wide(
	     file_range_io_handle->file_io_handle,
	     name,
	     name_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve name from file IO handle.",
		 function );

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

/* Sets the name for the file range handle
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_set_name_wide(
     libbfio_handle_t *handle,
     const wchar_t *name,
     size_t name_length,
     libcerror_error_t **error )
{
	libbfio_internal_handle_t *internal_handle           = NULL;
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_file_range_set_name_wide";

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

		return( -1 );
	}
	internal_handle = (libbfio_internal_handle_t *) handle;

	if( internal_handle->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid handle - missing IO handle.",
		 function );

		return( -1 );
	}
	file_range_io_handle = (libbfio_file_range_io_handle_t *) internal_handle->io_handle;

	if( libbfio_file_io_handle_set_name_wide(
	     file_range_io_handle->file_io_handle,
	     name,
	     name_length,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
		 "%s: unable to set name in file IO handle.",
		 function );

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

#endif /* defined( HAVE_WIDE_CHARACTER_TYPE ) */

/* Retrieves the range of the file range handle
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_get(
     libbfio_handle_t *handle,
     off64_t *range_offset,
     size64_t *range_size,
     libcerror_error_t **error )
{
	libbfio_internal_handle_t *internal_handle           = NULL;
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_file_range_get";

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

		return( -1 );
	}
	internal_handle = (libbfio_internal_handle_t *) handle;

	if( internal_handle->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid handle - missing IO handle.",
		 function );

		return( -1 );
	}
	file_range_io_handle = (libbfio_file_range_io_handle_t *) internal_handle->io_handle;

	if( range_offset == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid range offset.",
		 function );

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

		return( -1 );
	}
	*range_offset = file_range_io_handle->range_offset;
	*range_size   = file_range_io_handle->range_size;

	return( 1 );
}

/* Sets the range of the file range handle
 * A range size of 0 represents that the range continues until the end of the file
 * Returns 1 if succesful or -1 on error
 */
int libbfio_file_range_set(
     libbfio_handle_t *handle,
     off64_t range_offset,
     size64_t range_size,
     libcerror_error_t **error )
{
	libbfio_internal_handle_t *internal_handle           = NULL;
	libbfio_file_range_io_handle_t *file_range_io_handle = NULL;
	static char *function                                = "libbfio_file_range_set";

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

		return( -1 );
	}
	internal_handle = (libbfio_internal_handle_t *) handle;

	if( internal_handle->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid handle - missing IO handle.",
		 function );

		return( -1 );
	}
	file_range_io_handle = (libbfio_file_range_io_handle_t *) internal_handle->io_handle;

	if( range_offset < 0 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_LESS_THAN_ZERO,
		 "%s: invalid range offset value less than zero.",
		 function );

		return( -1 );
	}
	if( range_size > (size64_t) INT64_MAX )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
		 "%s: invalid range size value exceeds maximum.",
		 function );

		return( -1 );
	}
	file_range_io_handle->range_offset = range_offset;
	file_range_io_handle->range_size   = range_size;

	return( 1 );
}

/* Opens the file range handle
 * Returns 1 if successful or -1 on error
 */
int libbfio_file_range_open(
     libbfio_file_range_io_handle_t *file_range_io_handle,
     int access_flags,
     libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_open";
	size64_t file_size    = 0;

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

		return( -1 );
	}
	if( libbfio_file_open(
	     file_range_io_handle->file_io_handle,
	     access_flags,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_OPEN_FAILED,
		 "%s: unable to open file IO handle.",
		 function );

		return( -1 );
	}
	if( libbfio_file_get_size(
	     file_range_io_handle->file_io_handle,
	     &file_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve size from file IO handle.",
		 function );

		return( -1 );
	}
	if( file_range_io_handle->range_offset >= (off64_t) file_size )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
		 "%s: invalid range offset value exceeds file size.",
		 function );

		return( -1 );
	}
	file_size -= file_range_io_handle->range_offset;

	if( file_range_io_handle->range_size > file_size )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
		 "%s: invalid range size value exceeds file size.",
		 function );

		return( -1 );
	}
	if( libbfio_file_seek_offset(
	     file_range_io_handle->file_io_handle,
	     file_range_io_handle->range_offset,
	     SEEK_SET,
	     error ) == -1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_SEEK_FAILED,
		 "%s: unable to seek range offset in file IO handle.",
		 function );

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

/* Closes the file range handle
 * Returns 0 if successful or -1 on error
 */
int libbfio_file_range_close(
     libbfio_file_range_io_handle_t *file_range_io_handle,
     libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_close";

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

		return( -1 );
	}
	if( libbfio_file_close(
	     file_range_io_handle->file_io_handle,
	     error ) != 0 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_CLOSE_FAILED,
		 "%s: unable to close file IO handle.",
		 function );

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

/* Reads a buffer from the file range handle
 * Returns the number of bytes read if successful, or -1 on error
 */
ssize_t libbfio_file_range_read(
         libbfio_file_range_io_handle_t *file_range_io_handle,
         uint8_t *buffer,
         size_t size,
         libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_read";
	off64_t file_offset   = 0;
	ssize_t read_count    = 0;

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

		return( -1 );
	}
	file_offset = libbfio_file_seek_offset(
	               file_range_io_handle->file_io_handle,
	               0,
	               SEEK_CUR,
	               error );

	if( file_offset == -1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve current offset from file IO handle.",
		 function );

		return( -1 );
	}
	if( file_offset < file_range_io_handle->range_offset )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
		 "%s: invalid file offset value out of bounds.",
		 function );

		return( -1 );
	}
	if( file_range_io_handle->range_size != 0 )
	{
		if( (size64_t) file_offset >= file_range_io_handle->range_size )
		{
			return( 0 );
		}
		if( (size64_t) ( file_offset + size ) >= file_range_io_handle->range_size )
		{
			size = (size_t) ( file_range_io_handle->range_offset - file_offset );
		}
	}
	read_count = libbfio_file_read(
	              file_range_io_handle->file_io_handle,
	              buffer,
	              size,
	              error );

	if( read_count == -1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_READ_FAILED,
		 "%s: unable to read from file IO handle.",
		 function );

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

/* Writes a buffer to the file range handle
 * Returns the number of bytes written if successful, or -1 on error
 */
ssize_t libbfio_file_range_write(
         libbfio_file_range_io_handle_t *file_range_io_handle,
         const uint8_t *buffer,
         size_t size,
         libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_write";
	off64_t file_offset   = 0;
	ssize_t write_count   = 0;

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

		return( -1 );
	}
	file_offset = libbfio_file_seek_offset(
	               file_range_io_handle->file_io_handle,
	               0,
	               SEEK_CUR,
	               error );

	if( file_offset == -1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve current offset from file IO handle.",
		 function );

		return( -1 );
	}
	if( file_offset < file_range_io_handle->range_offset )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
		 "%s: invalid file offset value out of bounds.",
		 function );

		return( -1 );
	}
	if( file_range_io_handle->range_size != 0 )
	{
		if( (size64_t) file_offset >= file_range_io_handle->range_size )
		{
			return( 0 );
		}
		if( (size64_t) ( file_offset + size ) >= file_range_io_handle->range_size )
		{
			size = (size_t) ( file_range_io_handle->range_offset - file_offset );
		}
	}
	write_count = libbfio_file_write(
	               file_range_io_handle->file_io_handle,
	               buffer,
	               size,
	               error );

	if( write_count == -1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_READ_FAILED,
		 "%s: unable to write to file IO handle.",
		 function );

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

/* Seeks a certain offset within the file range handle
 * Returns the offset if the seek is successful or -1 on error
 */
off64_t libbfio_file_range_seek_offset(
         libbfio_file_range_io_handle_t *file_range_io_handle,
         off64_t offset,
         int whence,
         libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_seek_offset";
	off64_t file_offset   = 0;
	off64_t seek_offset   = 0;

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

		return( -1 );
	}
	if( ( whence != SEEK_CUR )
	 && ( whence != SEEK_END )
	 && ( whence != SEEK_SET ) )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
		 "%s: unsupported whence.",
		 function );

		return( -1 );
	}
	if( whence == SEEK_CUR )
	{
		file_offset = libbfio_file_seek_offset(
			       file_range_io_handle->file_io_handle,
			       0,
			       SEEK_CUR,
			       error );

		if( file_offset == -1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_RUNTIME,
			 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
			 "%s: unable to retrieve current offset from file IO handle.",
			 function );

			return( -1 );
		}
		offset += file_offset;
		whence  = SEEK_SET;
	}
	else if( whence == SEEK_END )
	{
		if( file_range_io_handle->range_size != 0 )
		{
			offset += file_range_io_handle->range_size;
			whence  = SEEK_SET;
		}
	}
	else if( whence == SEEK_SET )
	{
		offset += file_range_io_handle->range_offset;
	}
	if( whence == SEEK_SET )
	{
		if( offset < file_range_io_handle->range_offset )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_RUNTIME,
			 LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
			 "%s: invalid offset value out of bounds.",
			 function );

			return( -1 );
		}
	}
	seek_offset = libbfio_file_seek_offset(
	               file_range_io_handle->file_io_handle,
	               offset,
	               whence,
	               error );

	if( seek_offset == -1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_SEEK_FAILED,
		 "%s: unable to seek offset: %" PRIi64 " in file IO handle.",
		 function,
		 offset );

		return( -1 );
	}
	if( seek_offset < file_range_io_handle->range_offset )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
		 "%s: invalid offset: %" PRIi64 " value out of bounds.",
		 function,
		 seek_offset );

		return( -1 );
	}
	seek_offset -= file_range_io_handle->range_offset;

	return( seek_offset );
}

/* Function to determine if a file range exists
 * Returns 1 if file exists, 0 if not or -1 on error
 */
int libbfio_file_range_exists(
     libbfio_file_range_io_handle_t *file_range_io_handle,
     libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_exists";
	int result            = 0;

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

		return( -1 );
	}
	result = libbfio_file_exists(
	          file_range_io_handle->file_io_handle,
	          error );

	if( result == -1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_GENERIC,
		 "%s: unable to determine if file exists.",
		 function );

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

/* Check if the file range is open
 * Returns 1 if open, 0 if not or -1 on error
 */
int libbfio_file_range_is_open(
     libbfio_file_range_io_handle_t *file_range_io_handle,
     libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_is_open";
	int result            = 0;

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

		return( -1 );
	}
	result = libbfio_file_is_open(
	          file_range_io_handle->file_io_handle,
	          error );

	if( result == -1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_GENERIC,
		 "%s: unable to determine if file is open.",
		 function );

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

/* Retrieves the file range size
 * Returns 1 if successful or -1 on error
 */
int libbfio_file_range_get_size(
     libbfio_file_range_io_handle_t *file_range_io_handle,
     size64_t *size,
     libcerror_error_t **error )
{
	static char *function = "libbfio_file_range_get_size";

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

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

		return( -1 );
	}
	if( file_range_io_handle->range_size == 0 )
	{
		if( libbfio_file_get_size(
		     file_range_io_handle->file_io_handle,
		     size,
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_RUNTIME,
			 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
			 "%s: unable to determine size.",
			 function );

			return( -1 );
		}
		*size -= file_range_io_handle->range_offset;
	}
	else
	{
		*size = file_range_io_handle->range_size;
	}
	return( 1 );
}

