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/*
* This file is part of the libsigrokdecode project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
*
* This program 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.
*
* 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include "libsigrokdecode.h"
/**
* Get the value of a Python object's attribute, returned as a newly
* allocated char *.
*
* @param py_obj The object to probe.
* @param attr Name of the attribute to retrieve.
* @param outstr ptr to char * storage to be filled in.
*
* @return SRD_OK upon success, a (negative) error code otherwise.
* The 'outstr' argument points to a malloc()ed string upon success.
*
* @private
*/
SRD_PRIV int py_attr_as_str(const PyObject *py_obj, const char *attr,
char **outstr)
{
PyObject *py_str;
int ret;
if (!PyObject_HasAttrString((PyObject *)py_obj, attr)) {
srd_dbg("%s object has no attribute '%s'.",
Py_TYPE(py_obj)->tp_name, attr);
return SRD_ERR_PYTHON;
}
if (!(py_str = PyObject_GetAttrString((PyObject *)py_obj, attr))) {
srd_exception_catch("");
return SRD_ERR_PYTHON;
}
if (!PyUnicode_Check(py_str)) {
srd_dbg("%s attribute should be a string, but is a %s.",
attr, Py_TYPE(py_str)->tp_name);
Py_DecRef(py_str);
return SRD_ERR_PYTHON;
}
ret = py_str_as_str(py_str, outstr);
Py_DecRef(py_str);
return ret;
}
/**
* Get the value of a Python dictionary item, returned as a newly
* allocated char *.
*
* @param py_obj The dictionary to probe.
* @param key Key of the item to retrieve.
* @param outstr Pointer to char * storage to be filled in.
*
* @return SRD_OK upon success, a (negative) error code otherwise.
* The 'outstr' argument points to a malloc()ed string upon success.
*
* @private
*/
SRD_PRIV int py_dictitem_as_str(const PyObject *py_obj, const char *key,
char **outstr)
{
PyObject *py_value;
int ret;
if (!PyDict_Check((PyObject *)py_obj)) {
srd_dbg("Object is a %s, not a dictionary.",
Py_TYPE((PyObject *)py_obj)->tp_name);
return SRD_ERR_PYTHON;
}
if (!(py_value = PyDict_GetItemString((PyObject *)py_obj, key))) {
srd_dbg("Dictionary has no attribute '%s'.", key);
return SRD_ERR_PYTHON;
}
if (!PyUnicode_Check(py_value)) {
srd_dbg("Dictionary value for %s should be a string, but is "
"a %s.", key, Py_TYPE(py_value)->tp_name);
return SRD_ERR_PYTHON;
}
ret = py_str_as_str(py_value, outstr);
return ret;
}
/**
* Get the value of a Python unicode string object, returned as a newly
* allocated char *.
*
* @param py_str The unicode string object.
* @param outstr ptr to char * storage to be filled in.
*
* @return SRD_OK upon success, a (negative) error code otherwise.
* The 'outstr' argument points to a malloc()ed string upon success.
*
* @private
*/
SRD_PRIV int py_str_as_str(const PyObject *py_str, char **outstr)
{
PyObject *py_encstr;
int ret;
char *str;
py_encstr = NULL;
str = NULL;
ret = SRD_OK;
if (!PyUnicode_Check((PyObject *)py_str)) {
srd_dbg("Object is a %s, not a string object.",
Py_TYPE((PyObject *)py_str)->tp_name);
ret = SRD_ERR_PYTHON;
goto err_out;
}
if (!(py_encstr = PyUnicode_AsEncodedString((PyObject *)py_str,
"utf-8", NULL))) {
ret = SRD_ERR_PYTHON;
goto err_out;
}
if (!(str = PyBytes_AS_STRING(py_encstr))) {
ret = SRD_ERR_PYTHON;
goto err_out;
}
*outstr = g_strdup(str);
err_out:
if (py_encstr)
Py_XDECREF(py_encstr);
if (PyErr_Occurred()) {
srd_exception_catch("string conversion failed");
}
return ret;
}
/**
* Convert a Python list of unicode strings to a NULL-terminated UTF8-encoded
* char * array. The caller must g_free() each string when finished.
*
* @param py_strlist The list object.
* @param outstr ptr to char ** storage to be filled in.
*
* @return SRD_OK upon success, a (negative) error code otherwise.
* The 'outstr' argument points to a g_malloc()ed char** upon success.
*
* @private
*/
SRD_PRIV int py_strseq_to_char(const PyObject *py_strseq, char ***outstr)
{
PyObject *py_str;
int list_len, i;
char **out, *str;
list_len = PySequence_Size((PyObject *)py_strseq);
if (!(out = g_try_malloc(sizeof(char *) * (list_len + 1)))) {
srd_err("Failed to g_malloc() 'out'.");
return SRD_ERR_MALLOC;
}
for (i = 0; i < list_len; i++) {
if (!(py_str = PyUnicode_AsEncodedString(
PySequence_GetItem((PyObject *)py_strseq, i), "utf-8", NULL)))
return SRD_ERR_PYTHON;
if (!(str = PyBytes_AS_STRING(py_str)))
return SRD_ERR_PYTHON;
out[i] = g_strdup(str);
}
out[i] = NULL;
*outstr = out;
return SRD_OK;
}
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