struct srd_decoder: Add list of input/output decoder IDs.

[libsigrokdecode.git] / util.c

diff --git a/util.c b/util.c
index bb353d0a694ba072cd61ac8025ea9bddddd4896e..9a573ccd29e3ef68bc0fac2034fa188d05ef42f8 100644 (file)
--- a/util.c
+++ b/util.c
@@ -81,6 +81,58 @@ SRD_PRIV int py_attr_as_str(PyObject *py_obj, const char *attr, char **outstr)
        return ret;
 }
 
+/**
+ * Get the value of a Python object's attribute, returned as a newly
+ * allocated GSList of char *.
+ *
+ * @param[in] py_obj The object to probe.
+ * @param[in] attr Name of the attribute to retrieve.
+ * @param[out] outstrlist ptr to GSList of char * storage to be filled in.
+ *
+ * @return SRD_OK upon success, a (negative) error code otherwise.
+ *         The 'outstrlist' argument points to a GSList of g_malloc()ed strings
+ *         upon success.
+ *
+ * @private
+ */
+SRD_PRIV int py_attr_as_strlist(PyObject *py_obj, const char *attr, GSList **outstrlist)
+{
+       PyObject *py_list;
+       Py_ssize_t i;
+       int ret;
+       char *outstr;
+
+       if (!PyObject_HasAttrString(py_obj, attr)) {
+               srd_dbg("Object has no attribute '%s'.", attr);
+               return SRD_ERR_PYTHON;
+       }
+
+       if (!(py_list = PyObject_GetAttrString(py_obj, attr))) {
+               srd_exception_catch("Failed to get attribute '%s'", attr);
+               return SRD_ERR_PYTHON;
+       }
+
+       if (!PyList_Check(py_list)) {
+               srd_dbg("Object is not a list.");
+               return SRD_ERR_PYTHON;
+       }
+
+       *outstrlist = NULL;
+
+       for (i = 0; i < PyList_Size(py_list); i++) {
+               ret = py_listitem_as_str(py_list, i, &outstr);
+               if (ret < 0) {
+                       srd_dbg("Couldn't get item %" PY_FORMAT_SIZE_T "d.", i);
+                       return SRD_ERR_PYTHON;
+               }
+               *outstrlist = g_slist_append(*outstrlist, outstr);
+       }
+
+       Py_DECREF(py_list);
+
+       return SRD_OK;
+}
+
 /**
  * Get the value of a Python dictionary item, returned as a newly
  * allocated char *.
@@ -112,6 +164,37 @@ SRD_PRIV int py_dictitem_as_str(PyObject *py_obj, const char *key,
        return py_str_as_str(py_value, outstr);
 }
 
+/**
+ * Get the value of a Python list item, returned as a newly
+ * allocated char *.
+ *
+ * @param[in] py_obj The list to probe.
+ * @param[in] idx Index of the list 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_listitem_as_str(PyObject *py_obj, Py_ssize_t idx,
+                               char **outstr)
+{
+       PyObject *py_value;
+
+       if (!PyList_Check(py_obj)) {
+               srd_dbg("Object is not a list.");
+               return SRD_ERR_PYTHON;
+       }
+
+       if (!(py_value = PyList_GetItem(py_obj, idx))) {
+               srd_dbg("Couldn't get list item %" PY_FORMAT_SIZE_T "d.", idx);
+               return SRD_ERR_PYTHON;
+       }
+
+       return py_str_as_str(py_value, outstr);
+}
+
 /**
  * Get the value of a Python dictionary item, returned as a newly
  * allocated char *.