D-Bus  1.10.24
dbus-misc.c
1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-misc.c A few assorted public functions that don't fit elsewhere
3  *
4  * Copyright (C) 2006 Red Hat, Inc.
5  *
6  * Licensed under the Academic Free License version 2.1
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  *
22  */
23 
24 #include <config.h>
25 #include "dbus-misc.h"
26 #include "dbus-internals.h"
27 #include "dbus-string.h"
28 
72 char*
74 {
75  DBusString uuid;
76  char *s;
77 
78  s = NULL;
79 
80  if (!_dbus_string_init (&uuid))
81  return NULL;
82 
83  /* The documentation says dbus_get_local_machine_id() only fails on OOM;
84  * this can actually also fail if the D-Bus installation is faulty
85  * (no UUID) *and* reading a new random UUID fails, but we have no way
86  * to report that */
88  !_dbus_string_steal_data (&uuid, &s))
89  {
90  _dbus_string_free (&uuid);
91  return NULL;
92  }
93  else
94  {
95  _dbus_string_free (&uuid);
96  return s;
97  }
98 
99 }
100 
164 void
165 dbus_get_version (int *major_version_p,
166  int *minor_version_p,
167  int *micro_version_p)
168 {
169  if (major_version_p)
170  *major_version_p = DBUS_MAJOR_VERSION;
171  if (minor_version_p)
172  *minor_version_p = DBUS_MINOR_VERSION;
173  if (micro_version_p)
174  *micro_version_p = DBUS_MICRO_VERSION;
175 }
176 
177  /* End of public API */
179 
180 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
181 
182 #ifndef DOXYGEN_SHOULD_SKIP_THIS
183 
184 #include "dbus-test.h"
185 #include <stdlib.h>
186 
187 
189 _dbus_misc_test (void)
190 {
191  int major, minor, micro;
192  DBusString str;
193 
194  /* make sure we don't crash on NULL */
196 
197  /* Now verify that all the compile-time version stuff
198  * is right and matches the runtime. These tests
199  * are mostly intended to catch various kinds of
200  * typo (mixing up major and minor, that sort of thing).
201  */
202  dbus_get_version (&major, &minor, &micro);
203 
204  _dbus_assert (major == DBUS_MAJOR_VERSION);
205  _dbus_assert (minor == DBUS_MINOR_VERSION);
206  _dbus_assert (micro == DBUS_MICRO_VERSION);
207 
208 #define MAKE_VERSION(x, y, z) (((x) << 16) | ((y) << 8) | (z))
209 
210  /* check that MAKE_VERSION works and produces the intended ordering */
211  _dbus_assert (MAKE_VERSION (1, 0, 0) > MAKE_VERSION (0, 0, 0));
212  _dbus_assert (MAKE_VERSION (1, 1, 0) > MAKE_VERSION (1, 0, 0));
213  _dbus_assert (MAKE_VERSION (1, 1, 1) > MAKE_VERSION (1, 1, 0));
214 
215  _dbus_assert (MAKE_VERSION (2, 0, 0) > MAKE_VERSION (1, 1, 1));
216  _dbus_assert (MAKE_VERSION (2, 1, 0) > MAKE_VERSION (1, 1, 1));
217  _dbus_assert (MAKE_VERSION (2, 1, 1) > MAKE_VERSION (1, 1, 1));
218 
219  /* check DBUS_VERSION */
220  _dbus_assert (MAKE_VERSION (major, minor, micro) == DBUS_VERSION);
221 
222  /* check that ordering works with DBUS_VERSION */
223  _dbus_assert (MAKE_VERSION (major - 1, minor, micro) < DBUS_VERSION);
224  _dbus_assert (MAKE_VERSION (major, minor - 1, micro) < DBUS_VERSION);
225  _dbus_assert (MAKE_VERSION (major, minor, micro - 1) < DBUS_VERSION);
226 
227  _dbus_assert (MAKE_VERSION (major + 1, minor, micro) > DBUS_VERSION);
228  _dbus_assert (MAKE_VERSION (major, minor + 1, micro) > DBUS_VERSION);
229  _dbus_assert (MAKE_VERSION (major, minor, micro + 1) > DBUS_VERSION);
230 
231  /* Check DBUS_VERSION_STRING */
232 
233  if (!_dbus_string_init (&str))
234  _dbus_assert_not_reached ("no memory");
235 
236  if (!(_dbus_string_append_int (&str, major) &&
237  _dbus_string_append_byte (&str, '.') &&
238  _dbus_string_append_int (&str, minor) &&
239  _dbus_string_append_byte (&str, '.') &&
240  _dbus_string_append_int (&str, micro)))
241  _dbus_assert_not_reached ("no memory");
242 
243  _dbus_assert (_dbus_string_equal_c_str (&str, DBUS_VERSION_STRING));
244 
245  _dbus_string_free (&str);
246 
247  return TRUE;
248 }
249 
250 #endif /* !DOXYGEN_SHOULD_SKIP_THIS */
251 
252 #endif
#define NULL
A null pointer, defined appropriately for C or C++.
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_append_int(DBusString *str, long value)
Appends an integer to a DBusString.
Definition: dbus-sysdeps.c:354
dbus_bool_t _dbus_get_local_machine_uuid_encoded(DBusString *uuid_str, DBusError *error)
Gets the hex-encoded UUID of the machine this function is executed on.
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
void dbus_get_version(int *major_version_p, int *minor_version_p, int *micro_version_p)
Gets the DYNAMICALLY LINKED version of libdbus.
Definition: dbus-misc.c:165
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
dbus_bool_t _dbus_string_equal_c_str(const DBusString *a, const char *c_str)
Checks whether a string is equal to a C string.
Definition: dbus-string.c:2152
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
dbus_bool_t _dbus_string_append_byte(DBusString *str, unsigned char byte)
Appends a single byte to the string, returning FALSE if not enough memory.
Definition: dbus-string.c:1157
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
Definition: dbus-string.c:259
#define TRUE
Expands to &quot;1&quot;.
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
char * dbus_get_local_machine_id(void)
Obtains the machine UUID of the machine this process is running on.
Definition: dbus-misc.c:73
dbus_bool_t _dbus_string_steal_data(DBusString *str, char **data_return)
Like _dbus_string_get_data(), but removes the gotten data from the original string.
Definition: dbus-string.c:641