/* * This file is part of the libsigrokdecode project. * * Copyright (C) 2010 Uwe Hermann * Copyright (C) 2012 Bert Vermeulen * * 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 . */ #include #include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ /** * Get the value of a Python object's attribute, returned as a newly * allocated char *. * * @param[in] py_obj The object to probe. * @param[in] attr Name of the attribute to retrieve. * @param[out] 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 string upon success. * * @private */ SRD_PRIV int py_attr_as_str(PyObject *py_obj, const char *attr, char **outstr) { PyObject *py_str; int ret; if (!PyObject_HasAttrString(py_obj, attr)) { srd_dbg("Object has no attribute '%s'.", attr); return SRD_ERR_PYTHON; } if (!(py_str = PyObject_GetAttrString(py_obj, attr))) { srd_exception_catch("Failed to get attribute '%s'", attr); 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[in] py_obj The dictionary to probe. * @param[in] key Key of the item to retrieve. * @param[out] 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 g_malloc()ed string upon success. * * @private */ SRD_PRIV int py_dictitem_as_str(PyObject *py_obj, const char *key, char **outstr) { PyObject *py_value; if (!PyDict_Check(py_obj)) { srd_dbg("Object is not a dictionary."); return SRD_ERR_PYTHON; } if (!(py_value = PyDict_GetItemString(py_obj, key))) { srd_dbg("Dictionary has no attribute '%s'.", key); return SRD_ERR_PYTHON; } return py_str_as_str(py_value, outstr); } /** * Get the value of a Python unicode string object, returned as a newly * allocated char *. * * @param[in] py_str The unicode string object. * @param[out] 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 string upon success. * * @private */ SRD_PRIV int py_str_as_str(PyObject *py_str, char **outstr) { PyObject *py_bytes; char *str; if (!PyUnicode_Check(py_str)) { srd_dbg("Object is not a string object."); return SRD_ERR_PYTHON; } py_bytes = PyUnicode_AsUTF8String(py_str); if (py_bytes) { str = g_strdup(PyBytes_AsString(py_bytes)); Py_DECREF(py_bytes); if (str) { *outstr = str; return SRD_OK; } } srd_exception_catch("Failed to extract string"); return SRD_ERR_PYTHON; } /** * Convert a Python list of unicode strings to a C string vector. * On success, a pointer to a newly allocated NULL-terminated array of * allocated C strings is written to @a out_strv. The caller must g_free() * each string and the array itself. * * @param[in] py_strseq The sequence object. * @param[out] out_strv Address of string vector to be filled in. * * @return SRD_OK upon success, a (negative) error code otherwise. * * @private */ SRD_PRIV int py_strseq_to_char(PyObject *py_strseq, char ***out_strv) { PyObject *py_item, *py_bytes; char **strv, *str; ssize_t seq_len, i; if (!PySequence_Check(py_strseq)) { srd_err("Object does not provide sequence protocol."); return SRD_ERR_PYTHON; } seq_len = PySequence_Size(py_strseq); if (seq_len < 0) { srd_exception_catch("Failed to obtain sequence size"); return SRD_ERR_PYTHON; } strv = g_try_new0(char *, seq_len + 1); if (!strv) { srd_err("Failed to allocate result string vector."); return SRD_ERR_MALLOC; } for (i = 0; i < seq_len; i++) { py_item = PySequence_GetItem(py_strseq, i); if (!py_item) goto err_out; if (!PyUnicode_Check(py_item)) { Py_DECREF(py_item); goto err_out; } py_bytes = PyUnicode_AsUTF8String(py_item); Py_DECREF(py_item); if (!py_bytes) goto err_out; str = g_strdup(PyBytes_AsString(py_bytes)); Py_DECREF(py_bytes); if (!str) goto err_out; strv[i] = str; } *out_strv = strv; return SRD_OK; err_out: g_strfreev(strv); srd_exception_catch("Failed to obtain string item"); return SRD_ERR_PYTHON; } /** * Convert a Python scalar object to a GLib variant. * Supported variant types are string, int64 and double. * * @param[in] py_obj The Python object. Must not be NULL. * @return A floating reference to a new variant, or NULL on failure. */ SRD_PRIV GVariant *py_obj_to_variant(PyObject *py_obj) { GVariant *var = NULL; if (PyUnicode_Check(py_obj)) { /* string */ PyObject *py_bytes; const char *str; py_bytes = PyUnicode_AsUTF8String(py_obj); if (py_bytes) { str = PyBytes_AsString(py_bytes); if (str) var = g_variant_new_string(str); Py_DECREF(py_bytes); } if (!var) srd_exception_catch("Failed to extract string value"); } else if (PyLong_Check(py_obj)) { /* integer */ int64_t val; val = PyLong_AsLongLong(py_obj); if (!PyErr_Occurred()) var = g_variant_new_int64(val); else srd_exception_catch("Failed to extract integer value"); } else if (PyFloat_Check(py_obj)) { /* float */ double val; val = PyFloat_AsDouble(py_obj); if (!PyErr_Occurred()) var = g_variant_new_double(val); else srd_exception_catch("Failed to extract float value"); } else { srd_err("Failed to extract value of unsupported type."); } return var; }