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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <sys/cdefs.h>
#include <log/log_read.h>
const char log_time::default_format[] = "%m-%d %H:%M:%S.%3q";
const timespec log_time::EPOCH = { 0, 0 };
// Add %#q for fractional seconds to standard strptime function
char *log_time::strptime(const char *s, const char *format) {
time_t now;
#ifdef __linux__
*this = log_time(CLOCK_REALTIME);
now = tv_sec;
#else
time(&now);
tv_sec = now;
tv_nsec = 0;
#endif
struct tm *ptm;
#if (defined(HAVE_LOCALTIME_R))
struct tm tmBuf;
ptm = localtime_r(&now, &tmBuf);
#else
ptm = localtime(&now);
#endif
char fmt[strlen(format) + 1];
strcpy(fmt, format);
char *ret = const_cast<char *> (s);
char *cp;
for (char *f = cp = fmt; ; ++cp) {
if (!*cp) {
if (f != cp) {
ret = ::strptime(ret, f, ptm);
}
break;
}
if (*cp != '%') {
continue;
}
char *e = cp;
++e;
#if (defined(__BIONIC__))
if (*e == 's') {
*cp = '\0';
if (*f) {
ret = ::strptime(ret, f, ptm);
if (!ret) {
break;
}
}
tv_sec = 0;
while (isdigit(*ret)) {
tv_sec = tv_sec * 10 + *ret - '0';
++ret;
}
now = tv_sec;
#if (defined(HAVE_LOCALTIME_R))
ptm = localtime_r(&now, &tmBuf);
#else
ptm = localtime(&now);
#endif
} else
#endif
{
unsigned num = 0;
while (isdigit(*e)) {
num = num * 10 + *e - '0';
++e;
}
if (*e != 'q') {
continue;
}
*cp = '\0';
if (*f) {
ret = ::strptime(ret, f, ptm);
if (!ret) {
break;
}
}
unsigned long mul = NS_PER_SEC;
if (num == 0) {
num = INT_MAX;
}
tv_nsec = 0;
while (isdigit(*ret) && num && (mul > 1)) {
--num;
mul /= 10;
tv_nsec = tv_nsec + (*ret - '0') * mul;
++ret;
}
}
f = cp = e;
++f;
}
if (ret) {
tv_sec = mktime(ptm);
return ret;
}
// Upon error, place a known value into the class, the current time.
#ifdef __linux__
*this = log_time(CLOCK_REALTIME);
#else
time(&now);
tv_sec = now;
tv_nsec = 0;
#endif
return ret;
}
log_time log_time::operator-= (const timespec &T) {
// No concept of negative time, clamp to EPOCH
if (*this <= T) {
return *this = EPOCH;
}
if (this->tv_nsec < (unsigned long int)T.tv_nsec) {
--this->tv_sec;
this->tv_nsec = NS_PER_SEC + this->tv_nsec - T.tv_nsec;
} else {
this->tv_nsec -= T.tv_nsec;
}
this->tv_sec -= T.tv_sec;
return *this;
}
log_time log_time::operator-= (const log_time &T) {
// No concept of negative time, clamp to EPOCH
if (*this <= T) {
return *this = EPOCH;
}
if (this->tv_nsec < T.tv_nsec) {
--this->tv_sec;
this->tv_nsec = NS_PER_SEC + this->tv_nsec - T.tv_nsec;
} else {
this->tv_nsec -= T.tv_nsec;
}
this->tv_sec -= T.tv_sec;
return *this;
}
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