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/*
* Python file objects IO pool functions
*
* Copyright (C) 2009-2024, 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 <types.h>
#include "pyvmdk_file_object_io_handle.h"
#include "pyvmdk_file_objects_io_pool.h"
#include "pyvmdk_integer.h"
#include "pyvmdk_libbfio.h"
#include "pyvmdk_libcerror.h"
#include "pyvmdk_python.h"
/* Initializes the file objects IO pool
* Returns 1 if successful or -1 on error
*/
int pyvmdk_file_objects_pool_initialize(
libbfio_pool_t **pool,
PyObject *sequence_object,
int access_flags,
libcerror_error_t **error )
{
libbfio_handle_t *file_io_handle = NULL;
PyObject *file_object = NULL;
static char *function = "pyvmdk_file_objects_pool_initialize";
Py_ssize_t sequence_size = 0;
int element_index = 0;
int file_io_pool_entry = 0;
int number_of_elements = 0;
int result = 0;
if( pool == NULL )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid pool.",
function );
return( -1 );
}
if( *pool != NULL )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
"%s: invalid pool value already set.",
function );
return( -1 );
}
sequence_size = PySequence_Size(
sequence_object );
if( sequence_size > (Py_ssize_t) INT_MAX )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
"%s: invalid sequence size value exceeds maximum.",
function );
goto on_error;
}
number_of_elements = (int) sequence_size;
if( libbfio_pool_initialize(
pool,
0,
LIBBFIO_POOL_UNLIMITED_NUMBER_OF_OPEN_HANDLES,
error ) != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
"%s: unable to create pool.",
function );
goto on_error;
}
for( element_index = 0;
element_index < number_of_elements;
element_index++ )
{
file_object = PySequence_GetItem(
sequence_object,
element_index );
if( file_object == NULL )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
"%s: missing file object IO handle.",
function );
goto on_error;
}
PyErr_Clear();
result = PyObject_HasAttrString(
file_object,
"read" );
if( result != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
"%s: unsupported file object - missing read attribute.",
function );
goto on_error;
}
PyErr_Clear();
result = PyObject_HasAttrString(
file_object,
"seek" );
if( result != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
"%s: unsupported file object - missing seek attribute.",
function );
goto on_error;
}
if( pyvmdk_file_object_initialize(
&file_io_handle,
file_object,
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;
}
/* Remove the reference created by PySequence_GetItem
*/
Py_DecRef(
(PyObject *) file_object );
file_object = NULL;
if( libbfio_pool_append_handle(
*pool,
&file_io_pool_entry,
file_io_handle,
access_flags,
error ) != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,
"%s: unable to append file IO handle to pool.",
function );
goto on_error;
}
file_io_handle = NULL;
}
return( 1 );
on_error:
if( file_object != NULL )
{
Py_DecRef(
(PyObject *) file_object );
}
if( file_io_handle != NULL )
{
libbfio_handle_free(
&file_io_handle,
NULL );
}
if( *pool != NULL )
{
libbfio_pool_free(
pool,
NULL );
}
return( -1 );
}
|
