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/* Chrysalide - Outil d'analyse de fichiers binaires
* node.c - équivalent Python du fichier "plugins/yaml/node.c"
*
* Copyright (C) 2019-2020 Cyrille Bagard
*
* This file is part of Chrysalide.
*
* Chrysalide is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Chrysalide 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 General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "node.h"
#include <pygobject.h>
#include <plugins/pychrysalide/helpers.h>
#include "collection.h"
#include "line.h"
#include "../node.h"
#define YAML_NODE_DOC \
"YamlNode handles a node in a Yaml tree.\n" \
"\n" \
"There are three kinds of node contents defined in the Yaml specifications:\n" \
"* scalar, implemented by the pychrysalide.plugins.yaml.YamlScalar object.\n" \
"* sequence and mapping, implemented by the pychrysalide.plugins.yaml.YamlCollection object."
/* Recherche les noeuds correspondant à un chemin. */
static PyObject *py_yaml_node_find_by_path(PyObject *, PyObject *);
/* Recherche l'unique noeud correspondant à un chemin. */
static PyObject *py_yaml_node_find_one_by_path(PyObject *, PyObject *);
/* Fournit la ligne d'origine associée à un noeud. */
static PyObject *py_yaml_node_get_yaml_line(PyObject *, void *);
/******************************************************************************
* *
* Paramètres : self = variable non utilisée ici. *
* args = arguments fournis à l'appel. *
* *
* Description : Recherche les noeuds correspondant à un chemin. *
* *
* Retour : Liste de noeuds trouvés, éventuellement vide. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_yaml_node_find_by_path(PyObject *self, PyObject *args)
{
PyObject *result; /* Instance à retourner */
int prepare; /* Orientation des résultats */
const char *path; /* Chemin d'accès à traiter */
int ret; /* Bilan de lecture des args. */
GYamlNode *node; /* Version GLib du noeud */
GYamlNode **found; /* Créations GLib à transmettre*/
size_t count; /* Quantité de trouvailles */
size_t i; /* Boucle de parcours */
#define YAML_NODE_FIND_BY_PATH PYTHON_METHOD_DEF \
( \
find_by_path, "path, /, prepare=False", \
METH_VARARGS, py_yaml_node, \
"Find nodes from a Yaml node using a path.\n" \
"\n" \
"Paths are node keys separated by '/', such as '/my/path/to/node'." \
"\n" \
"In case where the path ends with a trailing '/', the operation can" \
" be used to prepare a further look by returning a node which can be" \
" searched by a new call to this function instead of returning all its" \
" contained nodes." \
)
prepare = 0;
ret = PyArg_ParseTuple(args, "s|p", &path, &prepare);
if (!ret) return NULL;
node = G_YAML_NODE(pygobject_get(self));
g_yaml_node_find_by_path(node, path, prepare, &found, &count);
result = PyTuple_New(count);
for (i = 0; i < count; i++)
{
#ifndef NDEBUG
ret = PyTuple_SetItem(result, i, pygobject_new(G_OBJECT(found[i])));
assert(ret == 0);
#else
PyTuple_SetItem(result, i, pygobject_new(G_OBJECT(found[i])));
#endif
g_object_unref(G_OBJECT(found[i]));
}
if (found != NULL)
free(found);
return result;
}
/******************************************************************************
* *
* Paramètres : self = variable non utilisée ici. *
* args = arguments fournis à l'appel. *
* *
* Description : Recherche l'unique noeud correspondant à un chemin. *
* *
* Retour : Noeud avec correspondance établie ou None. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_yaml_node_find_one_by_path(PyObject *self, PyObject *args)
{
PyObject *result; /* Instance à retourner */
int prepare; /* Orientation des résultats */
const char *path; /* Chemin d'accès à traiter */
int ret; /* Bilan de lecture des args. */
GYamlNode *node; /* Version GLib du noeud */
GYamlNode *found; /* Création GLib à transmettre */
#define YAML_NODE_FIND_ONE_BY_PATH PYTHON_METHOD_DEF \
( \
find_one_by_path, "path, /, prepare=False", \
METH_VARARGS, py_yaml_node, \
"Find a given node from a Yaml node using a path.\n" \
"\n" \
"Paths are node keys separated by '/', such as '/my/path/to/node'." \
"\n" \
"Only one node has to match the path for the function success." \
"\n" \
"In case where the path ends with a trailing '/', the operation can" \
" be used to prepare a further look by returning a node which can be" \
" searched by a new call to this function instead of returning all its" \
" contained nodes." \
)
prepare = 0;
ret = PyArg_ParseTuple(args, "s|p", &path, &prepare);
if (!ret) return NULL;
node = G_YAML_NODE(pygobject_get(self));
found = g_yaml_node_find_one_by_path(node, path, prepare);
if (found == NULL)
{
result = Py_None;
Py_INCREF(result);
}
else
{
result = pygobject_new(G_OBJECT(found));
g_object_unref(G_OBJECT(found));
}
return result;
}
/******************************************************************************
* *
* Paramètres : self = objet Python concerné par l'appel. *
* closure = non utilisé ici. *
* *
* Description : Fournit la ligne principale associée à un noeud. *
* *
* Retour : Ligne Yaml à l'origine du noeud. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_yaml_node_get_yaml_line(PyObject *self, void *closure)
{
PyObject *result; /* Résultat à retourner */
GYamlNode *node; /* Version GLib du noeud */
GYamlLine *line; /* Line Yaml associée */
#define YAML_NODE_YAML_LINE_ATTRIB PYTHON_GET_DEF_FULL \
( \
yaml_line, py_yaml_node, \
"Orginal Yaml line linked to the node." \
)
node = G_YAML_NODE(pygobject_get(self));
line = g_yaml_node_get_yaml_line(node);
if (line == NULL)
{
result = Py_None;
Py_INCREF(result);
}
else
{
result = pygobject_new(G_OBJECT(line));
g_object_unref(G_OBJECT(line));
}
return result;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Fournit un accès à une définition de type à diffuser. *
* *
* Retour : Définition d'objet pour Python. *
* *
* Remarques : - *
* *
******************************************************************************/
PyTypeObject *get_python_yaml_node_type(void)
{
static PyMethodDef py_yaml_node_methods[] = {
YAML_NODE_FIND_BY_PATH,
YAML_NODE_FIND_ONE_BY_PATH,
{ NULL }
};
static PyGetSetDef py_yaml_node_getseters[] = {
YAML_NODE_YAML_LINE_ATTRIB,
{ NULL }
};
static PyTypeObject py_yaml_node_type = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "pychrysalide.plugins.yaml.YamlNode",
.tp_basicsize = sizeof(PyGObject),
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IS_ABSTRACT | Py_TPFLAGS_BASETYPE,
.tp_doc = YAML_NODE_DOC,
.tp_methods = py_yaml_node_methods,
.tp_getset = py_yaml_node_getseters,
.tp_new = no_python_constructor_allowed
};
return &py_yaml_node_type;
}
/******************************************************************************
* *
* Paramètres : module = module dont la définition est à compléter. *
* *
* Description : Prend en charge l'objet 'pychrysalide.plugins.....YamlNode. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool register_python_yaml_node(PyObject *module)
{
PyTypeObject *type; /* Type Python 'YamlNode' */
PyObject *dict; /* Dictionnaire du module */
type = get_python_yaml_node_type();
dict = PyModule_GetDict(module);
if (!register_class_for_pygobject(dict, G_TYPE_YAML_NODE, type, &PyGObject_Type))
return false;
return true;
}
/******************************************************************************
* *
* Paramètres : arg = argument quelconque à tenter de convertir. *
* dst = destination des valeurs récupérées en cas de succès. *
* *
* Description : Tente de convertir en noeud d'arborescence de format Yaml. *
* *
* Retour : Bilan de l'opération, voire indications supplémentaires. *
* *
* Remarques : - *
* *
******************************************************************************/
int convert_to_yaml_node(PyObject *arg, void *dst)
{
int result; /* Bilan à retourner */
result = PyObject_IsInstance(arg, (PyObject *)get_python_yaml_node_type());
switch (result)
{
case -1:
/* L'exception est déjà fixée par Python */
result = 0;
break;
case 0:
PyErr_SetString(PyExc_TypeError, "unable to convert the provided argument to Yaml node");
break;
case 1:
*((GYamlNode **)dst) = G_YAML_NODE(pygobject_get(arg));
break;
default:
assert(false);
break;
}
return result;
}
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