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/** \ingroup python
* \file python/rpmmi-py.c
*/
#include "system.h"
#include "Python.h"
#include <rpmlib.h>
#include "rpmdb-py.h"
#include "rpmmi-py.h"
#include "header-py.h"
#include "debug.h"
/** \ingroup python
* \class rpm.mi
* \brief A python rpm.mi match iterator object represents the result of a
* database query.
*
* Instances of the rpm.mi object provide access to headers that match
* certain criteria. Typically, a primary index is accessed to find
* a set of headers that contain a key, and each header is returned
* serially.
*
* The rpm.mi class conains the following methods:
* - next() -> hdr Return the next header that matches.
*
* - pattern(tag,mire,pattern) Specify secondary match criteria.
*
* To obtain a rpm.mi object to query the database used by a transaction,
* the ts.match(tag,key,len) method is used.
*
* Here's an example that prints the name of all installed packages:
* \code
* import rpm
* ts = rpm.TransactionSet()
* mi = ts.dbMatch()
* while mi:
* h = mi.next()
* if not h:
* break
* print h['name']
* \endcode
*
* Here's a more typical example that uses the Name index to retrieve
* all installed kernel(s):
* \code
* import rpm
* ts = rpm.TransactionSet()
* mi = ts.dbMatch('name', "kernel")
* while mi:
* h = mi.next()
* if not h:
* break;
* print "%s-%s-%s" % (h['name'], h['version'], h['release'])
* \endcode
*
* Finally, here's an example that retrieves all packages whose name
* matches the glob expression "XFree*":
* \code
* import rpm
* ts = rpm.TransactionSet()
* mi = ts.dbMatch()
* mi.pattern('name', rpm.RPMMIRE_GLOB, "XFree*")
* while mi:
* h = mi.next{}
* if not h:
* break;
* print "%s-%s-%s" % (h['name'], h['version'], h['release'])
* \endcode
*
*/
/** \ingroup python
* \name Class: rpm.mi
*/
/*@{*/
#if Py_TPFLAGS_HAVE_ITER
static PyObject *
rpmmi_Iter(rpmmiObject * s)
{
assert(s->mi);
Py_INCREF(s);
return (PyObject *)s;
}
/** \ingroup python
*/
static PyObject *
rpmmi_Next(rpmmiObject * s)
{
Header h;
if (s->mi == NULL || (h = rpmdbNextIterator(s->mi)) == NULL) {
if (s->mi) s->mi = rpmdbFreeIterator(s->mi);
Py_INCREF(Py_None);
return Py_None;
}
return (PyObject *) hdr_Wrap(h);
}
#endif
/** \ingroup python
*/
static PyObject *
rpmmi_Pattern(rpmmiObject * s, PyObject * args)
{
PyObject *TagN = NULL;
int type;
char * pattern;
rpmTag tag;
if (!PyArg_ParseTuple(args, "Ois:Pattern", &TagN, &type, &pattern))
return NULL;
if ((tag = tagNumFromPyObject (TagN)) == -1) {
PyErr_SetString(PyExc_TypeError, "unknown tag type");
return NULL;
}
rpmdbSetIteratorRE(s->mi, tag, type, pattern);
Py_INCREF (Py_None);
return Py_None;
}
/** \ingroup python
*/
static struct PyMethodDef rpmmi_methods[] = {
#if Py_TPFLAGS_HAVE_ITER
{"iter", (PyCFunction) rpmmi_Iter, METH_VARARGS,
NULL},
{"next", (PyCFunction) rpmmi_Next, METH_VARARGS,
"mi.next() -> hdr\n\
- Retrieve next header that matches.\n" },
#endif
{"pattern", (PyCFunction) rpmmi_Pattern, METH_VARARGS,
"mi.pattern(TagN, mire_type, pattern)\n\
- Set a secondary match pattern on tags from retrieved header.\n" },
{NULL, NULL} /* sentinel */
};
/** \ingroup python
*/
static void rpmmi_dealloc(rpmmiObject * s)
{
if (s) {
if (s->mi) s->mi = rpmdbFreeIterator(s->mi);
PyMem_DEL(s);
}
}
/** \ingroup python
*/
static PyObject * rpmmi_getattr (rpmdbObject *s, char *name)
{
return Py_FindMethod (rpmmi_methods, (PyObject *) s, name);
}
/**
*/
static char rpmmi_doc[] =
"";
/** \ingroup python
*/
PyTypeObject rpmmi_Type = {
PyObject_HEAD_INIT(NULL)
0, /* ob_size */
"rpm.mi", /* tp_name */
sizeof(rpmmiObject), /* tp_size */
0, /* tp_itemsize */
(destructor) rpmmi_dealloc, /* tp_dealloc */
0, /* tp_print */
(getattrfunc) rpmmi_getattr, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
rpmmi_doc, /* tp_doc */
#if Py_TPFLAGS_HAVE_ITER
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
(getiterfunc) rpmmi_Iter, /* tp_iter */
(iternextfunc) rpmmi_Next, /* tp_iternext */
rpmmi_methods, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0, /* tp_free */
0, /* tp_is_gc */
#endif
};
rpmmiObject * rpmmi_Wrap(rpmdbMatchIterator mi)
{
rpmmiObject * mio;
if (mi == NULL) {
Py_INCREF(Py_None);
return (rpmmiObject *) Py_None;
}
mio = (rpmmiObject *) PyObject_NEW(rpmmiObject, &rpmmi_Type);
if (mio == NULL) {
PyErr_SetString(pyrpmError, "out of memory creating rpmmiObject");
return NULL;
}
mio->mi = mi;
return mio;
}
/*@}*/
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