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5d65ebb04b
In the next change, we want to export languages to the public libdrgn interface. I couldn't figure out any way to export array elements as their own symbols. I'd also rather not export the drgn_languages array indices as an enum because that would preclude ever having any sort of language plugin support. Instead, let's get rid of the drgn_languages array as it currently exists and have separate drgn_language structures. This also allows us to make a bunch of the C implementation functions static again. We keep the language numbers so that we can store per-language data efficiently (currently drgn_program::void_types and languages_py), as well as a drgn_languages array to go from the language number to the struct drgn_language. But, this is all internal and could be changed if we ever support language plugins. Signed-off-by: Omar Sandoval <osandov@osandov.com>
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
// Copyright (c) Meta Platforms, Inc. and affiliates.
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// SPDX-License-Identifier: GPL-3.0-or-later
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#include "drgnpy.h"
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#include "../array.h"
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#include "../language.h"
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static PyObject *Language_repr(Language *self)
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{
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return PyUnicode_FromFormat("Language.%s", self->attr_name);
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}
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static PyObject *Language_get_name(Language *self, void *arg)
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{
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return PyUnicode_FromString(self->language->name);
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}
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static PyGetSetDef Language_getset[] = {
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{"name", (getter)Language_get_name, NULL, drgn_Language_name_DOC, NULL},
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{},
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};
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PyTypeObject Language_type = {
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PyVarObject_HEAD_INIT(NULL, 0)
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.tp_name = "_drgn.Language",
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.tp_basicsize = sizeof(Language),
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.tp_repr = (reprfunc)Language_repr,
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.tp_flags = Py_TPFLAGS_DEFAULT,
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.tp_doc = drgn_Language_DOC,
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.tp_getset = Language_getset,
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};
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static PyObject *languages_py[DRGN_NUM_LANGUAGES];
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PyObject *Language_wrap(const struct drgn_language *language)
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{
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PyObject *obj = languages_py[language->number];
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Py_INCREF(obj);
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return obj;
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}
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int language_converter(PyObject *o, void *p)
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{
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const struct drgn_language **ret = p;
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if (o == Py_None) {
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*ret = NULL;
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return 1;
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} else if (PyObject_TypeCheck(o, &Language_type)) {
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*ret = ((Language *)o)->language;
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return 1;
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} else {
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PyErr_Format(PyExc_TypeError,
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"expected Language, not %s",
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Py_TYPE(o)->tp_name);
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return 0;
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}
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}
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int add_languages(void)
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{
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static const char * const attr_names[] = {
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[DRGN_LANGUAGE_C] = "C",
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[DRGN_LANGUAGE_CPP] = "CPP",
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};
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static_assert(array_size(attr_names) == DRGN_NUM_LANGUAGES,
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"missing language in attr_names");
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for (size_t i = 0; i < DRGN_NUM_LANGUAGES; i++) {
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Language *language_obj =
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(Language *)Language_type.tp_alloc(&Language_type, 0);
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if (!language_obj)
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return -1;
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language_obj->attr_name = attr_names[i];
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language_obj->language = drgn_languages[i];
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languages_py[i] = (PyObject *)language_obj;
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int ret = PyDict_SetItemString(Language_type.tp_dict,
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attr_names[i],
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(PyObject *)language_obj);
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if (ret)
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return ret;
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}
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return 0;
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}
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