diff options
| author | Cyrille Bagard <nocbos@gmail.com> | 2018-01-13 22:37:31 (GMT) | 
|---|---|---|
| committer | Cyrille Bagard <nocbos@gmail.com> | 2018-01-13 22:37:31 (GMT) | 
| commit | 23b9c6e68bbe5f0531f9a9408c2deb9f897701dc (patch) | |
| tree | 3804d6c21c9cd5e291cb8c7853607cdda992d125 /plugins/pychrysa/format/symiter.c | |
| parent | a6975c1d754a1ba5bfb9e23f0b26692c746e6f9c (diff) | |
Created a real iterator for symbols.
Diffstat (limited to 'plugins/pychrysa/format/symiter.c')
| -rw-r--r-- | plugins/pychrysa/format/symiter.c | 276 | 
1 files changed, 276 insertions, 0 deletions
| diff --git a/plugins/pychrysa/format/symiter.c b/plugins/pychrysa/format/symiter.c new file mode 100644 index 0000000..db0b744 --- /dev/null +++ b/plugins/pychrysa/format/symiter.c @@ -0,0 +1,276 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * symiter.c - équivalent Python du fichier "format/symiter.c" + * + * Copyright (C) 2017 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 "symiter.h" + + +#include <pygobject.h> + + +#include <format/symiter.h> + + +#include "format.h" + + + +/* Transcription d'un itérateur en Python */ +typedef struct _PySymIterator +{ +    PyObject_HEAD;                          /* A laisser en premier        */ + +    sym_iter_t *native;                     /* Version native de l'objet   */ +    bool first_time;                        /* Premier élément retourné ?  */ + +} PySymIterator; + + +/* Libère de la mémoire un itérateur sur des symboles. */ +static void py_sym_iterator_dealloc(PySymIterator *); + +/* Fournit le symbole qui en suit un autr. */ +static PyObject *py_sym_iterator_next(PySymIterator *); + +/* Initialise un nouvel itérateur. */ +static int py_sym_iterator_init(PySymIterator *, PyObject *, PyObject *); + +/* Construit un nouvel itérateur. */ +static PyObject *py_sym_iterator_new(PyTypeObject *, PyObject *, PyObject *); + + + +/****************************************************************************** +*                                                                             * +*  Paramètres  : self = itérateur à supprimer.                                * +*                                                                             * +*  Description : Libère de la mémoire un itérateur sur des symboles.          * +*                                                                             * +*  Retour      : -                                                            * +*                                                                             * +*  Remarques   : -                                                            * +*                                                                             * +******************************************************************************/ + +static void py_sym_iterator_dealloc(PySymIterator *self) +{ +    delete_symbol_iterator(self->native); + +    Py_TYPE(self)->tp_free((PyObject *)self); + +} + + +/****************************************************************************** +*                                                                             * +*  Paramètres  : self = itérateur à manipuler.                                * +*                                                                             * +*  Description : Fournit le symbole qui en suit un autre.                     * +*                                                                             * +*  Retour      : Symbole suivant trouvé, ou NULL.                             * +*                                                                             * +*  Remarques   : -                                                            * +*                                                                             * +******************************************************************************/ + +static PyObject *py_sym_iterator_next(PySymIterator *self) +{ +    PyObject *result;                       /* Résultat à retourner        */ +    GBinSymbol *next;                       /* Symbole suivant             */ + +    if (self->first_time) +    { +        next = get_symbol_iterator_current(self->native); +        self->first_time = false; +    } + +    else +        next = get_symbol_iterator_next(self->native); + +    if (next != NULL) +    { +        result = pygobject_new(G_OBJECT(next)); +        g_object_unref(G_OBJECT(next)); +    } + +    else +    { +        PyErr_SetNone(PyExc_StopIteration); +        result = NULL; +    } + +    return result; + +} + + +/****************************************************************************** +*                                                                             * +*  Paramètres  : self = instance d'objet à initialiser.                       * +*                args = arguments passés pour l'appel.                        * +*                kwds = mots clefs éventuellement fournis en complément.      * +*                                                                             * +*  Description : Initialise un nouvel itérateur.                              * +*                                                                             * +*  Retour      : Bilan de l'opération.                                        * +*                                                                             * +*  Remarques   : -                                                            * +*                                                                             * +******************************************************************************/ + +static int py_sym_iterator_init(PySymIterator *self, PyObject *args, PyObject *kwds) +{ +    int result;                             /* Bilan à retourner           */ +    PyObject *fmt_obj;                      /* Format version Python       */ +    unsigned long index;                    /* Indice de premier symbole   */ +    int ret;                                /* Bilan de lecture des args.  */ +    GBinFormat *format;                     /* Version native du format    */ + +    result = -1; + +    ret = PyArg_ParseTuple(args, "Ok", &fmt_obj, &index); +    if (ret == 0) goto psii_exit; + +    ret = PyObject_IsInstance(fmt_obj, (PyObject *)get_python_binary_format_type()); +    if (!ret) goto psii_exit; + +    format = G_BIN_FORMAT(pygobject_get(fmt_obj)); + +    self->native = create_symbol_iterator(format, index); +    self->first_time = true; + +    result = 0; + + psii_exit: + +    return result; + +} + + +/****************************************************************************** +*                                                                             * +*  Paramètres  : type = type d'objet à mettre en place.                       * +*                args = arguments passés pour l'appel.                        * +*                kwds = mots clefs éventuellement fournis en complément.      * +*                                                                             * +*  Description : Construit un nouvel itérateur.                               * +*                                                                             * +*  Retour      : Définition d'objet pour Python.                              * +*                                                                             * +*  Remarques   : -                                                            * +*                                                                             * +******************************************************************************/ + +static PyObject *py_sym_iterator_new(PyTypeObject *type, PyObject *args, PyObject *kwds) +{ +    PySymIterator *result;                  /* Nouvelle instance à renvoyer*/ +    int ret;                                /* Bilan de l'initialisation   */ + +    result = (PySymIterator *)type->tp_alloc(type, 0); + +    if (result != NULL) +    { +        ret = py_sym_iterator_init(result, args, kwds); + +        if (ret != 0) +        { +            Py_DECREF(result); +            result = NULL; +        } + +    } + +    return (PyObject *)result; + +} + + +/****************************************************************************** +*                                                                             * +*  Paramètres  : -                                                            * +*                                                                             * +*  Description : Fournit un accès à une définition de type à diffuser.        * +*                                                                             * +*  Retour      : Définition d'objet pour Python.                              * +*                                                                             * +*  Remarques   : -                                                            * +*                                                                             * +******************************************************************************/ + +PyTypeObject *get_python_sym_iterator_type(void) +{ +    static PyTypeObject py_sym_iterator_type = { + +        PyVarObject_HEAD_INIT(NULL, 0) + +        .tp_name        = "pychrysalide.format.SymIterator", +        .tp_basicsize   = sizeof(PySymIterator), + +        .tp_dealloc     = (destructor)py_sym_iterator_dealloc, + +        .tp_flags       = Py_TPFLAGS_DEFAULT, + +        .tp_doc         = "Iterator for Chrysalide symbols registered in a given format.", + +        .tp_iter        = PyObject_SelfIter, +        .tp_iternext    = (iternextfunc)py_sym_iterator_next, + +        .tp_init        = (initproc)py_sym_iterator_init, +        .tp_new         = py_sym_iterator_new, + +    }; + +    return &py_sym_iterator_type; + +} + + +/****************************************************************************** +*                                                                             * +*  Paramètres  : module = module dont la définition est à compléter.          * +*                                                                             * +*  Description : Prend en charge l'objet 'pychrysalide.format.SymIterator'.   * +*                                                                             * +*  Retour      : Bilan de l'opération.                                        * +*                                                                             * +*  Remarques   : -                                                            * +*                                                                             * +******************************************************************************/ + +bool register_python_sym_iterator(PyObject *module) +{ +    PyTypeObject *py_sym_iterator_type;     /* Type Python 'BinContent'    */ +    int ret;                                /* Bilan d'un appel            */ + +    py_sym_iterator_type = get_python_sym_iterator_type(); + +    if (PyType_Ready(py_sym_iterator_type) < 0) +        return false; + +    Py_INCREF(py_sym_iterator_type); +    ret = PyModule_AddObject(module, "SymIterator", (PyObject *)py_sym_iterator_type); + +    return (ret == 0); + +} | 
