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comparison Sources/PythonObject.cpp @ 0:7ed502b17b8f

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initial commit
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 26 Mar 2020 18:47:01 +0100
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children fd58eb5749ed
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-1:000000000000 0:7ed502b17b8f
1 /**
2 * Python plugin for Orthanc
3 * Copyright (C) 2017-2020 Osimis S.A., Belgium
4 *
5 * This program is free software: you can redistribute it and/or
6 * modify it under the terms of the GNU Affero General Public License
7 * as published by the Free Software Foundation, either version 3 of
8 * the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Affero General Public License for more details.
14 *
15 * You should have received a copy of the GNU Affero General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 **/
18
19
20 #include "PythonObject.h"
21
22
23 #include "PythonLock.h"
24
25 #include <OrthancPluginCppWrapper.h>
26
27
28 PythonObject::PythonObject(PythonLock& lock,
29 PyObject *object,
30 bool borrowed) :
31 lock_(lock),
32 object_(object),
33 borrowed_(borrowed)
34 {
35 }
36
37
38 PythonObject::~PythonObject()
39 {
40 if (!borrowed_ &&
41 object_ != NULL)
42 {
43 Py_DECREF(object_);
44 }
45 }
46
47
48 PyObject* PythonObject::GetPyObject() const
49 {
50 if (object_ == NULL)
51 {
52 // "IsValid()" should have been called
53 ORTHANC_PLUGINS_THROW_EXCEPTION(BadSequenceOfCalls);
54 }
55 else
56 {
57 return object_;
58 }
59 }
60
61
62 PythonObject* PythonObject::GetAttribute(const std::string& name)
63 {
64 return new PythonObject(lock_, PyObject_GetAttrString(GetPyObject(), name.c_str()));
65 }
66
67
68 bool PythonObject::ToUtf8String(std::string& target)
69 {
70 PyObject* value = GetPyObject(); // Raises an exception if needed
71
72 if (PyUnicode_Check(value))
73 {
74 PythonObject encoded(lock_, PyUnicode_AsEncodedString(value, "utf-8", "replace"));
75 if (encoded.IsValid())
76 {
77 target = PyBytes_AS_STRING(encoded.GetPyObject());
78 return true;
79 }
80 else
81 {
82 target.clear();
83 return false;
84 }
85 }
86 #if PY_MAJOR_VERSION == 2
87 else if (PyString_Check(value))
88 {
89 target = PyString_AS_STRING(value);
90 return true;
91 }
92 #endif
93 else
94 {
95 target.clear();
96 return false;
97 }
98 }
99
100
101 void PythonObject::Format(std::ostream& os)
102 {
103 std::string s;
104 if (object_ == NULL)
105 {
106 os << "Can't format a NULL Python object" << std::endl;
107 }
108 else if (ToUtf8String(s))
109 {
110 os << s;
111 }
112 else
113 {
114 os << "Can't format this Python object" << std::endl;
115 }
116 }
117
118
119 PyObject* PythonObject::Release()
120 {
121 if (!borrowed_ &&
122 object_ != NULL)
123 {
124 PyObject* value = object_;
125 object_ = NULL;
126 return value;
127 }
128 else
129 {
130 OrthancPlugins::LogError("Cannot release a NULL or borrowed reference");
131 ORTHANC_PLUGINS_THROW_EXCEPTION(InternalError);
132 }
133 }
134