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Programs-Scripts/pywrapper/pywrapper.cpp at master · litsand/Programs-Scripts · GitHub
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/*
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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* Author:
* Matias Fontanini
*
*/
#
include
<
algorithm
>
#
include
"
pywrapper.h
"
using
std::runtime_error;
using
std::string;
namespace
Python
{
Object::Object
() {
}
Object::Object
(PyObject *obj) : py_obj(make_pyshared(obj)) {
}
Python::Object::pyshared_ptr
Object::make_pyshared
(PyObject *obj) {
return
pyshared_ptr
(obj, [](PyObject *obj) {
Py_XDECREF
(obj); });
}
Object
Object::from_script
(
const
string &script_path) {
char
arr[] =
"
path
"
;
PyObject *
path
(
PySys_GetObject
(arr));
string
base_path
(
"
.
"
), file_path;
size_t
last_slash
(script_path.
rfind
(
"
/
"
));
if
(last_slash != string::npos) {
if
(last_slash >= script_path.
size
() -
2
)
throw
runtime_error
(
"
Invalid script path
"
);
base_path = script_path.
substr
(
0
, last_slash);
file_path = script_path.
substr
(last_slash +
1
);
}
else
file_path = script_path;
if
(file_path.
rfind
(
"
.py
"
) == file_path.
size
() -
3
)
file_path = file_path.
substr
(
0
, file_path.
size
() -
3
);
pyunique_ptr
pwd
(
PyString_FromString
(base_path.
c_str
()));
PyList_Append
(path, pwd.
get
());
/*
We don't need that string value anymore, so deref it
*/
PyObject *
py_ptr
(
PyImport_ImportModule
(file_path.
c_str
()));
if
(!py_ptr) {
print_error
();
throw
runtime_error
(
"
Failed to load script
"
);
}
return
{py_ptr};
}
PyObject *
Object::load_function
(
const
std::string &name) {
PyObject *
obj
(
PyObject_GetAttrString
(py_obj.
get
(), name.
c_str
()));
if
(!obj)
throw
std::runtime_error
(
"
Failed to find function
"
);
return
obj;
}
Object
Object::call_function
(
const
std::string &name) {
pyunique_ptr
func
(
load_function
(name));
PyObject *
ret
(
PyObject_CallObject
(func.
get
(),
0
));
if
(!ret)
throw
std::runtime_error
(
"
Failed to call function
"
);
return
{ret};
}
Object
Object::get_attr
(
const
std::string &name) {
PyObject *
obj
(
PyObject_GetAttrString
(py_obj.
get
(), name.
c_str
()));
if
(!obj)
throw
std::runtime_error
(
"
Unable to find attribute '
"
+ name +
'
\'
'
);
return
{obj};
}
bool
Object::has_attr
(
const
std::string &name) {
try
{
get_attr
(name);
return
true
;
}
catch
(std::runtime_error&) {
return
false
;
}
}
void
initialize
() {
Py_Initialize
();
}
void
finalize
() {
Py_Finalize
();
}
void
clear_error
() {
PyErr_Clear
();
}
void
print_error
() {
PyErr_Print
();
}
void
print_object
(PyObject *obj) {
PyObject_Print
(obj, stdout,
0
);
}
//
Allocation methods
PyObject *
alloc_pyobject
(
const
std::string &str) {
return
PyString_FromString
(str.
c_str
());
}
PyObject *
alloc_pyobject
(
const
std::vector<
char
> &val,
size_t
sz) {
return
PyByteArray_FromStringAndSize
(val.
data
(), sz);
}
PyObject *
alloc_pyobject
(
const
std::vector<
char
> &val) {
return
alloc_pyobject
(val, val.
size
());
}
PyObject *
alloc_pyobject
(
const
char
*cstr) {
return
PyString_FromString
(cstr);
}
PyObject *
alloc_pyobject
(
bool
value) {
return
PyBool_FromLong
(value);
}
PyObject *
alloc_pyobject
(
double
num) {
return
PyFloat_FromDouble
(num);
}
bool
is_py_int
(PyObject *obj) {
return
PyInt_Check
(obj);
}
bool
is_py_float
(PyObject *obj) {
return
PyFloat_Check
(obj);
}
bool
convert
(PyObject *obj, std::string &val) {
if
(!
PyString_Check
(obj))
return
false
;
val =
PyString_AsString
(obj);
return
true
;
}
bool
convert
(PyObject *obj, std::vector<
char
> &val) {
if
(!
PyByteArray_Check
(obj))
return
false
;
if
(val.
size
() < (
size_t
)
PyByteArray_Size
(obj))
val.
resize
(
PyByteArray_Size
(obj));
std::copy
(
PyByteArray_AsString
(obj),
PyByteArray_AsString
(obj) +
PyByteArray_Size
(obj),
val.
begin
());
return
true
;
}
/*
bool convert(PyObject *obj, Py_ssize_t &val) {
return generic_convert<Py_ssize_t>(obj, is_py_int, PyInt_AsSsize_t, val);
}
*/
bool
convert
(PyObject *obj,
bool
&value) {
if
(obj == Py_False)
value =
false
;
else
if
(obj == Py_True)
value =
true
;
else
return
false
;
return
true
;
}
bool
convert
(PyObject *obj,
double
&val) {
return
generic_convert<
double
>(obj, is_py_float, PyFloat_AsDouble, val);
}
/*
bool convert(PyObject *obj, size_t &val) {
return generic_convert<size_t>(obj, is_py_int, PyInt_AsLong, val);
}
*/
}
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