1 /* Copyright (C) 2013-2014 Free Software Foundation, Inc.
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License as published by
5 the Free Software Foundation; either version 3 of the License, or
6 (at your option) any later version.
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
13 You should have received a copy of the GNU General Public License
14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 #include "python-internal.h"
19 #include "varobj-iter.h"
21 /* A dynamic varobj iterator "class" for python pretty-printed
22 varobjs. This inherits struct varobj_iter. */
26 /* The 'base class'. */
27 struct varobj_iter base;
29 /* The python iterator returned by the printer's 'children' method,
30 or NULL if not available. */
34 /* Implementation of the 'dtor' method of pretty-printed varobj
38 py_varobj_iter_dtor (struct varobj_iter *self)
40 struct py_varobj_iter *dis = (struct py_varobj_iter *) self;
41 struct cleanup *back_to = varobj_ensure_python_env (self->var);
43 Py_XDECREF (dis->iter);
45 do_cleanups (back_to);
48 /* Implementation of the 'next' method of pretty-printed varobj
52 py_varobj_iter_next (struct varobj_iter *self)
54 struct py_varobj_iter *t = (struct py_varobj_iter *) self;
55 struct cleanup *back_to;
58 back_to = varobj_ensure_python_env (self->var);
60 item = PyIter_Next (t->iter);
64 /* Normal end of iteration. */
65 if (!PyErr_Occurred ())
68 /* If we got a memory error, just use the text as the item. */
69 if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error))
71 PyObject *type, *value, *trace;
72 char *name_str, *value_str;
74 PyErr_Fetch (&type, &value, &trace);
75 value_str = gdbpy_exception_to_string (type, value);
79 if (value_str == NULL)
85 name_str = xstrprintf ("<error at %d>",
86 self->next_raw_index++);
87 item = Py_BuildValue ("(ss)", name_str, value_str);
98 /* Any other kind of error. */
104 self->next_raw_index++;
105 do_cleanups (back_to);
109 /* The 'vtable' of pretty-printed python varobj iterators. */
111 static const struct varobj_iter_ops py_varobj_iter_ops =
117 /* Constructor of pretty-printed varobj iterators. VAR is the varobj
118 whose children the iterator will be iterating over. PYITER is the
119 python iterator actually responsible for the iteration. */
121 static void CPYCHECKER_STEALS_REFERENCE_TO_ARG (3)
122 py_varobj_iter_ctor (struct py_varobj_iter *self,
123 struct varobj *var, PyObject *pyiter)
125 self->base.var = var;
126 self->base.ops = &py_varobj_iter_ops;
127 self->base.next_raw_index = 0;
131 /* Allocate and construct a pretty-printed varobj iterator. VAR is
132 the varobj whose children the iterator will be iterating over.
133 PYITER is the python iterator actually responsible for the
136 static struct py_varobj_iter * CPYCHECKER_STEALS_REFERENCE_TO_ARG (2)
137 py_varobj_iter_new (struct varobj *var, PyObject *pyiter)
139 struct py_varobj_iter *self;
141 self = XNEW (struct py_varobj_iter);
142 py_varobj_iter_ctor (self, var, pyiter);
146 /* Return a new pretty-printed varobj iterator suitable to iterate
147 over VAR's children. */
150 py_varobj_get_iterator (struct varobj *var, PyObject *printer)
155 struct py_varobj_iter *py_iter;
156 struct cleanup *back_to = varobj_ensure_python_env (var);
158 if (!PyObject_HasAttr (printer, gdbpy_children_cst))
160 do_cleanups (back_to);
164 children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst,
166 if (children == NULL)
168 gdbpy_print_stack ();
169 error (_("Null value returned for children"));
172 make_cleanup_py_decref (children);
174 iter = PyObject_GetIter (children);
177 gdbpy_print_stack ();
178 error (_("Could not get children iterator"));
181 py_iter = py_varobj_iter_new (var, iter);
183 do_cleanups (back_to);
185 return &py_iter->base;