1 /*
2 * Copyright (C) 2014 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 #define _POSIX_THREAD_SAFE_FUNCTIONS // For mingw localtime_r().
18
19 #include <ctype.h>
20 #include <limits.h>
21 #include <stdio.h>
22 #include <string.h>
23
24 #include <private/android_logger.h>
25
26 // Add %#q for fractional seconds to standard strptime function
strptime(const char * s,const char * format)27 char* log_time::strptime(const char* s, const char* format) {
28 time_t now;
29 #ifdef __linux__
30 *this = log_time(CLOCK_REALTIME);
31 now = tv_sec;
32 #else
33 time(&now);
34 tv_sec = now;
35 tv_nsec = 0;
36 #endif
37
38 struct tm tmBuf;
39 struct tm* ptm = localtime_r(&now, &tmBuf);
40
41 char fmt[strlen(format) + 1];
42 strcpy(fmt, format);
43
44 char* ret = const_cast<char*>(s);
45 char* cp;
46 for (char* f = cp = fmt;; ++cp) {
47 if (!*cp) {
48 if (f != cp) {
49 ret = ::strptime(ret, f, ptm);
50 }
51 break;
52 }
53 if (*cp != '%') {
54 continue;
55 }
56 char* e = cp;
57 ++e;
58 #if (defined(__BIONIC__))
59 if (*e == 's') {
60 *cp = '\0';
61 if (*f) {
62 ret = ::strptime(ret, f, ptm);
63 if (!ret) {
64 break;
65 }
66 }
67 tv_sec = 0;
68 while (isdigit(*ret)) {
69 tv_sec = tv_sec * 10 + *ret - '0';
70 ++ret;
71 }
72 now = tv_sec;
73 ptm = localtime_r(&now, &tmBuf);
74 } else
75 #endif
76 {
77 unsigned num = 0;
78 while (isdigit(*e)) {
79 num = num * 10 + *e - '0';
80 ++e;
81 }
82 if (*e != 'q') {
83 continue;
84 }
85 *cp = '\0';
86 if (*f) {
87 ret = ::strptime(ret, f, ptm);
88 if (!ret) {
89 break;
90 }
91 }
92 unsigned long mul = NS_PER_SEC;
93 if (num == 0) {
94 num = INT_MAX;
95 }
96 tv_nsec = 0;
97 while (isdigit(*ret) && num && (mul > 1)) {
98 --num;
99 mul /= 10;
100 tv_nsec = tv_nsec + (*ret - '0') * mul;
101 ++ret;
102 }
103 }
104 f = cp = e;
105 ++f;
106 }
107
108 if (ret) {
109 tv_sec = mktime(ptm);
110 return ret;
111 }
112
113 // Upon error, place a known value into the class, the current time.
114 #ifdef __linux__
115 *this = log_time(CLOCK_REALTIME);
116 #else
117 time(&now);
118 tv_sec = now;
119 tv_nsec = 0;
120 #endif
121 return ret;
122 }
123