1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/*
* 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. */
/**
* 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;
}
|
