src/python/database.c

   1 /*
   2         libloc - A library to determine the location of someone on the Internet
   3
   4         Copyright (C) 2017 IPFire Development Team <info@ipfire.org>
   5
   6         This library is free software; you can redistribute it and/or
   7         modify it under the terms of the GNU Lesser General Public
   8         License as published by the Free Software Foundation; either
   9         version 2.1 of the License, or (at your option) any later version.
  10
  11         This library is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14         Lesser General Public License for more details.
  15 */
  16
  17 #include <Python.h>
  18
  19 #include <loc/libloc.h>
  20 #include <loc/database.h>
  21
  22 #include "database.h"
  23
  24 static PyObject* Database_new(PyTypeObject* type, PyObject* args, PyObject* kwds) {
  25         // Create libloc context
  26         struct loc_ctx* ctx;
  27         int r = loc_new(&ctx);
  28         if (r)
  29                 return NULL;
  30
  31         DatabaseObject* self = (DatabaseObject*)type->tp_alloc(type, 0);
  32         if (self) {
  33                 self->ctx = ctx;
  34         }
  35
  36         return (PyObject*)self;
  37 }
  38
  39 static void Database_dealloc(DatabaseObject* self) {
  40         if (self->db)
  41                 loc_database_unref(self->db);
  42
  43         if (self->ctx)
  44                 loc_unref(self->ctx);
  45
  46         Py_TYPE(self)->tp_free((PyObject* )self);
  47 }
  48
  49 static int Database_init(DatabaseObject* self, PyObject* args, PyObject* kwargs) {
  50         const char* path = NULL;
  51
  52         if (!PyArg_ParseTuple(args, "s", &path))
  53                 return -1;
  54
  55         // Open the file for reading
  56         FILE* f = fopen(path, "r");
  57         if (!f)
  58                 return -1;
  59
  60         // Load the database
  61         int r = loc_database_new(self->ctx, &self->db, f);
  62         fclose(f);
  63
  64         // Return on any errors
  65         if (r)
  66                 return -1;
  67
  68         return 0;
  69 }
  70
  71 static PyObject* Database_get_description(DatabaseObject* self) {
  72         const char* description = loc_database_get_description(self->db);
  73
  74         return PyUnicode_FromString(description);
  75 }
  76
  77 static PyObject* Database_get_vendor(DatabaseObject* self) {
  78         const char* vendor = loc_database_get_vendor(self->db);
  79
  80         return PyUnicode_FromString(vendor);
  81 }
  82
  83 static struct PyMethodDef Database_methods[] = {
  84         { NULL },
  85 };
  86
  87 static struct PyGetSetDef Database_getsetters[] = {
  88         {
  89                 "description",
  90                 (getter)Database_get_description,
  91                 NULL,
  92                 NULL,
  93                 NULL,
  94         },
  95         {
  96                 "vendor",
  97                 (getter)Database_get_vendor,
  98                 NULL,
  99                 NULL,
 100                 NULL
 101         },
 102         { NULL },
 103 };
 104
 105 PyTypeObject DatabaseType = {
 106         PyVarObject_HEAD_INIT(NULL, 0)
 107         tp_name:                "location.Database",
 108         tp_basicsize:           sizeof(DatabaseObject),
 109         tp_flags:               Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
 110         tp_new:                 Database_new,
 111         tp_dealloc:             (destructor)Database_dealloc,
 112         tp_init:                (initproc)Database_init,
 113         tp_doc:                 "Database object",
 114         tp_methods:             Database_methods,
 115         tp_getset:              Database_getsetters,
 116 };