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 #include <ctype.h>
18 #include <limits.h>
19 #include <stdio.h>
20 #include <string.h>
21
22 #include <private/android_logger.h>
23
24 // Add %#q for fractional seconds to standard strptime function
strptime(const char * s,const char * format)25 char* log_time::strptime(const char* s, const char* format) {
26 time_t now;
27 #ifdef __linux__
28 *this = log_time(CLOCK_REALTIME);
29 now = tv_sec;
30 #else
31 time(&now);
32 tv_sec = now;
33 tv_nsec = 0;
34 #endif
35
36 struct tm* ptm;
37 #if !defined(_WIN32)
38 struct tm tmBuf;
39 ptm = localtime_r(&now, &tmBuf);
40 #else
41 ptm = localtime(&now);
42 #endif
43
44 char fmt[strlen(format) + 1];
45 strcpy(fmt, format);
46
47 char* ret = const_cast<char*>(s);
48 char* cp;
49 for (char* f = cp = fmt;; ++cp) {
50 if (!*cp) {
51 if (f != cp) {
52 ret = ::strptime(ret, f, ptm);
53 }
54 break;
55 }
56 if (*cp != '%') {
57 continue;
58 }
59 char* e = cp;
60 ++e;
61 #if (defined(__BIONIC__))
62 if (*e == 's') {
63 *cp = '\0';
64 if (*f) {
65 ret = ::strptime(ret, f, ptm);
66 if (!ret) {
67 break;
68 }
69 }
70 tv_sec = 0;
71 while (isdigit(*ret)) {
72 tv_sec = tv_sec * 10 + *ret - '0';
73 ++ret;
74 }
75 now = tv_sec;
76 #if !defined(_WIN32)
77 ptm = localtime_r(&now, &tmBuf);
78 #else
79 ptm = localtime(&now);
80 #endif
81 } else
82 #endif
83 {
84 unsigned num = 0;
85 while (isdigit(*e)) {
86 num = num * 10 + *e - '0';
87 ++e;
88 }
89 if (*e != 'q') {
90 continue;
91 }
92 *cp = '\0';
93 if (*f) {
94 ret = ::strptime(ret, f, ptm);
95 if (!ret) {
96 break;
97 }
98 }
99 unsigned long mul = NS_PER_SEC;
100 if (num == 0) {
101 num = INT_MAX;
102 }
103 tv_nsec = 0;
104 while (isdigit(*ret) && num && (mul > 1)) {
105 --num;
106 mul /= 10;
107 tv_nsec = tv_nsec + (*ret - '0') * mul;
108 ++ret;
109 }
110 }
111 f = cp = e;
112 ++f;
113 }
114
115 if (ret) {
116 tv_sec = mktime(ptm);
117 return ret;
118 }
119
120 // Upon error, place a known value into the class, the current time.
121 #ifdef __linux__
122 *this = log_time(CLOCK_REALTIME);
123 #else
124 time(&now);
125 tv_sec = now;
126 tv_nsec = 0;
127 #endif
128 return ret;
129 }
130