Boost.org-python-module/src/object_protocol.cpp at develop · crypto318/Boost.org-python-module · GitHub

History

197 lines (175 loc) · 5.6 KB

Raw

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

192

193

194

195

196

197

// Copyright David Abrahams 2002.

// Distributed under the Boost Software License, Version 1.0. (See

// accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

#include <boost/python/object_protocol.hpp>

#include <boost/python/errors.hpp>

#include <boost/python/object.hpp>

#include <boost/python/ssize_t.hpp>

namespace boost { namespace python { namespace api {

BOOST_PYTHON_DECL object getattr(object const& target, object const& key)

{

return object(detail::new_reference(PyObject_GetAttr(target.ptr(), key.ptr())));

}

BOOST_PYTHON_DECL object getattr(object const& target, object const& key, object const& default_)

{

PyObject* result = PyObject_GetAttr(target.ptr(), key.ptr());

if (result == NULL && PyErr_ExceptionMatches(PyExc_AttributeError))

{

PyErr_Clear();

return default_;

}

return object(detail::new_reference(result));

}

BOOST_PYTHON_DECL void setattr(object const& target, object const& key, object const& value)

{

if (PyObject_SetAttr(target.ptr(), key.ptr(), value.ptr()) == -1)

throw_error_already_set();

}

BOOST_PYTHON_DECL void delattr(object const& target, object const& key)

{

if (PyObject_DelAttr(target.ptr(), key.ptr()) == -1)

throw_error_already_set();

}

BOOST_PYTHON_DECL object getattr(object const& target, char const* key)

{

return object(

detail::new_reference(

PyObject_GetAttrString(target.ptr(), const_cast<char*>(key))

));

}

BOOST_PYTHON_DECL object getattr(object const& target, char const* key, object const& default_)

{

PyObject* result = PyObject_GetAttrString(target.ptr(), const_cast<char*>(key));

if (result == NULL && PyErr_ExceptionMatches(PyExc_AttributeError))

{

PyErr_Clear();

return default_;

}

return object(detail::new_reference(result));

}

BOOST_PYTHON_DECL void setattr(object const& target, char const* key, object const& value)

{

if (PyObject_SetAttrString(

target.ptr(), const_cast<char*>(key), value.ptr()) == -1

)

{

throw_error_already_set();

}

BOOST_PYTHON_DECL void delattr(object const& target, char const* key)

{

if (PyObject_DelAttrString(

target.ptr(), const_cast<char*>(key)) == -1

)

{

throw_error_already_set();

}

BOOST_PYTHON_DECL object getitem(object const& target, object const& key)

{

return object(detail::new_reference(

PyObject_GetItem(target.ptr(), key.ptr())));

}

BOOST_PYTHON_DECL void setitem(object const& target, object const& key, object const& value)

{

if (PyObject_SetItem(target.ptr(), key.ptr(), value.ptr()) == -1)

throw_error_already_set();

}

BOOST_PYTHON_DECL void delitem(object const& target, object const& key)

{

if (PyObject_DelItem(target.ptr(), key.ptr()) == -1)

throw_error_already_set();

}

namespace // slicing code copied directly out of the Python implementation

{

#undef ISINT

#define ISINT(x) ((x) == NULL || PyInt_Check(x) || PyLong_Check(x))

static PyObject *

apply_slice(PyObject *u, PyObject *v, PyObject *w) /* return u[v:w] */

{

#if PY_VERSION_HEX < 0x03000000

PyTypeObject *tp = u->ob_type;

PySequenceMethods *sq = tp->tp_as_sequence;

if (sq && sq->sq_slice && ISINT(v) && ISINT(w)) {

ssize_t ilow = 0, ihigh = ssize_t_max;

if (!_PyEval_SliceIndex(v, &ilow))

return NULL;

if (!_PyEval_SliceIndex(w, &ihigh))

return NULL;

return PySequence_GetSlice(u, ilow, ihigh);

}

else

#endif

{

PyObject *slice = PySlice_New(v, w, NULL);

if (slice != NULL) {

PyObject *res = PyObject_GetItem(u, slice);

Py_DECREF(slice);

return res;

}

else

return NULL;

}

static int

assign_slice(PyObject *u, PyObject *v, PyObject *w, PyObject *x)

/* u[v:w] = x */

{

#if PY_VERSION_HEX < 0x03000000

PyTypeObject *tp = u->ob_type;

PySequenceMethods *sq = tp->tp_as_sequence;

if (sq && sq->sq_slice && ISINT(v) && ISINT(w)) {

ssize_t ilow = 0, ihigh = ssize_t_max;

if (!_PyEval_SliceIndex(v, &ilow))

return -1;

if (!_PyEval_SliceIndex(w, &ihigh))

return -1;

if (x == NULL)

return PySequence_DelSlice(u, ilow, ihigh);

else

return PySequence_SetSlice(u, ilow, ihigh, x);

}

else

#endif

{

PyObject *slice = PySlice_New(v, w, NULL);

if (slice != NULL) {

int res;

if (x != NULL)

res = PyObject_SetItem(u, slice, x);

else

res = PyObject_DelItem(u, slice);

Py_DECREF(slice);

return res;

}

else

return -1;

}

BOOST_PYTHON_DECL object getslice(object const& target, handle<> const& begin, handle<> const& end)

{

return object(

detail::new_reference(

apply_slice(target.ptr(), begin.get(), end.get())));

}

BOOST_PYTHON_DECL void setslice(object const& target, handle<> const& begin, handle<> const& end, object const& value)

{

if (assign_slice(

target.ptr(), begin.get(), end.get(), value.ptr()) == -1

)

{

throw_error_already_set();

}

BOOST_PYTHON_DECL void delslice(object const& target, handle<> const& begin, handle<> const& end)

{

if (assign_slice(

target.ptr(), begin.get(), end.get(), 0) == -1

)

{

throw_error_already_set();

}

}}} // namespace boost::python::api

Boost.org-python-module/src/object_protocol.cpp at develop · crypto318/Boost.org-python-module · GitHub

Expand file tree

Breadcrumbs

object_protocol.cpp

Latest commit

History

Breadcrumbs

object_protocol.cpp

File metadata and controls