static gboolean
parse_iptc (const unsigned char *buffer,
size_t len,
const gchar *uri,
TrackerIptcData *data)
{
#ifdef HAVE_LIBIPTCDATA
IptcData *iptc;
#endif /* HAVE_LIBIPTCDATA */
memset (data, 0, sizeof (TrackerIptcData));
#ifdef HAVE_LIBIPTCDATA
/* FIXME According to valgrind this is leaking (together with the unref).
* Problem in libiptc (I replaced this with the _free equivalent) */
iptc = iptc_data_new ();
if (!iptc)
return FALSE;
if (iptc_data_load (iptc, buffer, len) < 0) {
iptc_data_free (iptc);
return FALSE;
}
iptc_data_foreach_dataset (iptc, foreach_dataset, data);
iptc_data_free (iptc);
#endif /* HAVE_LIBIPTCDATA */
return TRUE;
}
/* Function of no arguments returning new Data object */
static PyObject *
open_file(PyObject *self, PyObject *args)
{
char *filename;
int fd;
DataObject *data_obj;
unsigned char file_hdr[2], jpeg_hdr[2] = {0xff,0xd8};
if (!PyArg_ParseTuple(args, "s:new", &filename))
return NULL;
/* check if the file exists first. We close this fd just
* because, but maybe in the future there is a case for
* keeping it around. */
fd = open(filename, O_RDONLY);
if (fd < 0)
return PyErr_SetFromErrnoWithFilename(PyExc_IOError, filename);
/* read the first 2 bytes, and check it looks like a jpeg */
if (read(fd, file_hdr, 2) < 2) {
close(fd);
return PyErr_SetFromErrnoWithFilename(PyExc_IOError, filename);
}
if (memcmp(jpeg_hdr, file_hdr, 2) != 0) {
close(fd);
PyErr_SetString(PyExc_ValueError,
"This file does not appear to be a JPEG file\n");
return NULL;
}
close(fd);
data_obj = newDataObject(args);
if (data_obj == NULL)
return PyErr_NoMemory();
/* save the filename for later */
data_obj->filename = PyString_FromString(filename);
if (!data_obj->filename) {
Py_DECREF(data_obj);
return PyErr_NoMemory();
}
/* firstly, try and get the existing data */
data_obj->d = iptc_data_new_from_jpeg(filename);
if (data_obj->d) {
/* read the existing iptc data into the dataset objects */
int i;
for (i=0; i < data_obj->d->count; i++) {
IptcDataSet *e = data_obj->d->datasets[i];
DataSetObject *ds = newDataSetObject(e);
/* XXX bail out? */
/* dataset objects hold a reference to their
* parent dataobject */
ds->parent = data_obj;
Py_INCREF(data_obj);
ds->state = VALID;
PyList_Append(data_obj->DataSet_list, (PyObject *)ds);
}
} else {
/* create a new, empty data object */
data_obj->d = iptc_data_new();
if (!data_obj->d)
return PyErr_NoMemory();
}
data_obj->state = OPEN;
return (PyObject*)data_obj;
}
