LogUtils.h revision f10e27379064797acb2659afc45b54eafbfcd019 
1/*
2 * Copyright (C) 2012-2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _LOGD_LOG_UTILS_H__
18#define _LOGD_LOG_UTILS_H__
19
20#include <sys/cdefs.h>
21#include <sys/types.h>
22
23#include <android/log.h>
24#include <sysutils/SocketClient.h>
25
26// Hijack this header as a common include file used by most all sources
27// to report some utilities defined here and there.
28
29namespace android {
30
31// Furnished in main.cpp. Caller must own and free returned value
32char *uidToName(uid_t uid);
33void prdebug(const char *fmt, ...) __printflike(1, 2);
34
35// Furnished in LogStatistics.cpp. Caller must own and free returned value
36char *pidToName(pid_t pid);
37char *tidToName(pid_t tid);
38
39// Furnished in main.cpp. Thread safe.
40const char *tagToName(size_t *len, uint32_t tag);
41
42}
43
44// Furnished in LogCommand.cpp
45bool clientHasLogCredentials(uid_t uid, gid_t gid, pid_t pid);
46bool clientHasLogCredentials(SocketClient *cli);
47
48static inline bool worstUidEnabledForLogid(log_id_t id) {
49    return (id == LOG_ID_MAIN) || (id == LOG_ID_SYSTEM) ||
50            (id == LOG_ID_RADIO) || (id == LOG_ID_EVENTS);
51}
52
53template <int (*cmp)(const char *l, const char *r, const size_t s)>
54static inline int fast(const char *l, const char *r, const size_t s) {
55    return (*l != *r) || cmp(l + 1, r + 1, s - 1);
56}
57
58template <int (*cmp)(const void *l, const void *r, const size_t s)>
59static inline int fast(const void *lv, const void *rv, const size_t s) {
60    const char *l = static_cast<const char *>(lv);
61    const char *r = static_cast<const char *>(rv);
62    return (*l != *r) || cmp(l + 1, r + 1, s - 1);
63}
64
65template <int (*cmp)(const char *l, const char *r)>
66static inline int fast(const char *l, const char *r) {
67    return (*l != *r) || cmp(l + 1, r + 1);
68}
69
70#endif // _LOGD_LOG_UTILS_H__
71