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python: Add new helper functions for python to C integral conversion

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int libvirt_intUnwrap(PyObject *obj, int *val);
    int libvirt_uintUnwrap(PyObject *obj, unsigned int *val);
    int libvirt_longUnwrap(PyObject *obj, long *val);
    int libvirt_ulongUnwrap(PyObject *obj, unsigned long *val);
    int libvirt_longlongUnwrap(PyObject *obj, long long *val);
    int libvirt_ulonglongUnwrap(PyObject *obj, unsigned long long *val);
    int libvirt_doubleUnwrap(PyObject *obj, double *val);
    int libvirt_boolUnwrap(PyObject *obj, bool *val);
This commit is contained in:
Guannan Ren 2012-03-27 14:06:10 +08:00 committed by Eric Blake
parent 3ff4b06968
commit 384ebd3fc5
2 changed files with 141 additions and 0 deletions
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132
python/typewrappers.c
View File

@ -119,6 +119,138 @@ libvirt_constcharPtrWrap(const char *str)
return ret;
}
int
libvirt_intUnwrap(PyObject *obj, int *val)
{
long long_val;
/* If obj is type of PyInt_Type, PyInt_AsLong converts it
* to C long type directly. If it is of PyLong_Type, PyInt_AsLong
* will call PyLong_AsLong() to deal with it automatically.
*/
long_val = PyInt_AsLong(obj);
if ((long_val == -1) && PyErr_Occurred())
return -1;
if ((int)long_val == long_val) {
*val = long_val;
} else {
PyErr_SetString(PyExc_OverflowError,
"Python int too large to convert to C int");
return -1;
}
return 0;
}
int
libvirt_uintUnwrap(PyObject *obj, unsigned int *val)
{
long long_val;
long_val = PyInt_AsLong(obj);
if ((long_val == -1) && PyErr_Occurred())
return -1;
if ((unsigned int)long_val == long_val) {
*val = long_val;
} else {
PyErr_SetString(PyExc_OverflowError,
"Python int too large to convert to C unsigned int");
return -1;
}
return 0;
}
int
libvirt_longUnwrap(PyObject *obj, long *val)
{
long long_val;
long_val = PyInt_AsLong(obj);
if ((long_val == -1) && PyErr_Occurred())
return -1;
*val = long_val;
return 0;
}
int
libvirt_ulongUnwrap(PyObject *obj, unsigned long *val)
{
long long_val;
long_val = PyInt_AsLong(obj);
if ((long_val == -1) && PyErr_Occurred())
return -1;
*val = long_val;
return 0;
}
int
libvirt_longlongUnwrap(PyObject *obj, long long *val)
{
long long llong_val;
/* If obj is of PyInt_Type, PyLong_AsLongLong
* will call PyInt_AsLong() to handle it automatically.
*/
llong_val = PyLong_AsLongLong(obj);
if ((llong_val == -1) && PyErr_Occurred())
return -1;
*val = llong_val;
return 0;
}
int
libvirt_ulonglongUnwrap(PyObject *obj, unsigned long long *val)
{
unsigned long long ullong_val = -1;
/* The PyLong_AsUnsignedLongLong doesn't check the type of
* obj, only accept argument of PyLong_Type, so we check it instead.
*/
if (PyInt_Check(obj))
ullong_val = PyInt_AsLong(obj);
else if (PyLong_Check(obj))
ullong_val = PyLong_AsUnsignedLongLong(obj);
else
PyErr_SetString(PyExc_TypeError, "an integer is required");
if ((ullong_val == -1) && PyErr_Occurred())
return -1;
*val = ullong_val;
return 0;
}
int
libvirt_doubleUnwrap(PyObject *obj, double *val)
{
double double_val;
double_val = PyFloat_AsDouble(obj);
if ((double_val == -1) && PyErr_Occurred())
return -1;
*val = double_val;
return 0;
}
int
libvirt_boolUnwrap(PyObject *obj, bool *val)
{
int ret;
ret = PyObject_IsTrue(obj);
if (ret < 0)
return ret;
*val = ret > 0;
return 0;
}
PyObject *
libvirt_virDomainPtrWrap(virDomainPtr node)
{

9
python/typewrappers.h
View File

@ -7,6 +7,7 @@
*/
#include <Python.h>
#include <stdbool.h>
#include "libvirt/libvirt.h"
#include "libvirt/virterror.h"
@ -163,6 +164,14 @@ PyObject * libvirt_ulonglongWrap(unsigned long long val);
PyObject * libvirt_charPtrWrap(char *str);
PyObject * libvirt_charPtrSizeWrap(char *str, Py_ssize_t size);
PyObject * libvirt_constcharPtrWrap(const char *str);
int libvirt_intUnwrap(PyObject *obj, int *val);
int libvirt_uintUnwrap(PyObject *obj, unsigned int *val);
int libvirt_longUnwrap(PyObject *obj, long *val);
int libvirt_ulongUnwrap(PyObject *obj, unsigned long *val);
int libvirt_longlongUnwrap(PyObject *obj, long long *val);
int libvirt_ulonglongUnwrap(PyObject *obj, unsigned long long *val);
int libvirt_doubleUnwrap(PyObject *obj, double *val);
int libvirt_boolUnwrap(PyObject *obj, bool *val);
PyObject * libvirt_virConnectPtrWrap(virConnectPtr node);
PyObject * libvirt_virDomainPtrWrap(virDomainPtr node);
PyObject * libvirt_virNetworkPtrWrap(virNetworkPtr node);