MySQL  8.0.26
Source Code Documentation
my_basename.h
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1 /* Copyright (c) 2017, 2021, Oracle and/or its affiliates.
2 
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14  This program is distributed in the hope that it will be useful,
15  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  GNU General Public License, version 2.0, for more details.
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19  You should have received a copy of the GNU General Public License
20  along with this program; if not, write to the Free Software
21  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22 
23 #ifndef MY_BASENAME_INCLUDED
24 #define MY_BASENAME_INCLUDED
25 
26 /**
27  @file include/my_basename.h
28  A macro that gives __FILE__ without the directory name (e.g. foo.cc instead of
29  ../sql/foo.cc), calculated compile-time. Note that the entire __FILE__
30  string is still present in the binary; only the pointer is adjusted.
31 */
32 
33 static constexpr int basename_index(const char *const path, const int index) {
34  return (index == -1 || path[index] == '/' || path[index] == '\\')
35  ? index + 1
36  : basename_index(path, index - 1);
37 }
38 
39 #define MY_BASENAME (&__FILE__[basename_index(__FILE__, sizeof(__FILE__) - 1)])
40 
41 #ifndef LOG_SUBSYSTEM_TAG
42 constexpr const char *basename_prefix_eval(const char *const path) {
43  return (path[0] == 'r' && path[1] == 'p' && path[2] == 'l' && path[3] == '_')
44  ? "Repl"
45  : nullptr;
46 }
47 
48 constexpr int basename_prefix_find(const char *const path, const int index) {
49  return (path[index] == '/' || path[index] == '\\')
50  ? index + 1
51  : basename_prefix_find(path, index - 1);
52 }
53 
54 #define LOG_SUBSYSTEM_TAG \
55  basename_prefix_eval( \
56  &__FILE__[basename_prefix_find(__FILE__, sizeof(__FILE__) - 1)])
57 
58 #endif
59 
60 #endif // MY_BASENAME_INCLUDED
static constexpr int basename_index(const char *const path, const int index)
Definition: my_basename.h:33
constexpr int basename_prefix_find(const char *const path, const int index)
Definition: my_basename.h:48
constexpr const char * basename_prefix_eval(const char *const path)
Definition: my_basename.h:42
static char * path
Definition: mysqldump.cc:132