/src/haproxy/src/ebtree.c
Line | Count | Source |
1 | | /* |
2 | | * Elastic Binary Trees - exported generic functions |
3 | | * Version 6.0.6 |
4 | | * (C) 2002-2011 - Willy Tarreau <w@1wt.eu> |
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, version 2.1 |
9 | | * exclusively. |
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 | | * You should have received a copy of the GNU Lesser General Public |
17 | | * License along with this library; if not, write to the Free Software |
18 | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | | */ |
20 | | |
21 | | #include <import/ebtree.h> |
22 | | |
23 | | void eb_delete(struct eb_node *node) |
24 | 0 | { |
25 | 0 | __eb_delete(node); |
26 | 0 | } |
27 | | |
28 | | /* used by insertion primitives */ |
29 | | struct eb_node *eb_insert_dup(struct eb_node *sub, struct eb_node *new) |
30 | 0 | { |
31 | 0 | return __eb_insert_dup(sub, new); |
32 | 0 | } |
33 | | |
34 | | /* compares memory blocks m1 and m2 for up to <len> bytes. Immediately stops at |
35 | | * the first non-matching byte. It returns 0 on full match, non-zero otherwise. |
36 | | * One byte will always be checked so this must not be called with len==0. It |
37 | | * takes 2+5cy/B on x86_64 and is ~29 bytes long. |
38 | | */ |
39 | | int eb_memcmp(const void *m1, const void *m2, size_t len) |
40 | 0 | { |
41 | 0 | const char *p1 = (const char *)m1 + len; |
42 | 0 | const char *p2 = (const char *)m2 + len; |
43 | 0 | ssize_t ofs = -len; |
44 | 0 | char diff; |
45 | |
|
46 | 0 | do { |
47 | 0 | diff = p1[ofs] - p2[ofs]; |
48 | 0 | } while (!diff && ++ofs); |
49 | 0 | return diff; |
50 | 0 | } |