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/*
* Copyright (C) 2013-2014 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.
*/
#ifndef _LIBS_LOG_LOG_READ_H
#define _LIBS_LOG_LOG_READ_H
#include <stdint.h>
#include <time.h>
/* struct log_time is a wire-format variant of struct timespec */
#define NS_PER_SEC 1000000000ULL
#ifdef __cplusplus
// NB: do NOT define a copy constructor. This will result in structure
// no longer being compatible with pass-by-value which is desired
// efficient behavior. Also, pass-by-reference breaks C/C++ ABI.
struct log_time {
public:
uint32_t tv_sec; // good to Feb 5 2106
uint32_t tv_nsec;
static const uint32_t tv_sec_max = 0xFFFFFFFFUL;
static const uint32_t tv_nsec_max = 999999999UL;
log_time(const timespec &T)
{
tv_sec = T.tv_sec;
tv_nsec = T.tv_nsec;
}
log_time(uint32_t sec, uint32_t nsec)
{
tv_sec = sec;
tv_nsec = nsec;
}
static const timespec EPOCH;
log_time()
{
}
log_time(clockid_t id)
{
timespec T;
clock_gettime(id, &T);
tv_sec = T.tv_sec;
tv_nsec = T.tv_nsec;
}
log_time(const char *T)
{
const uint8_t *c = (const uint8_t *) T;
tv_sec = c[0] | (c[1] << 8) | (c[2] << 16) | (c[3] << 24);
tv_nsec = c[4] | (c[5] << 8) | (c[6] << 16) | (c[7] << 24);
}
// timespec
bool operator== (const timespec &T) const
{
return (tv_sec == static_cast<uint32_t>(T.tv_sec))
&& (tv_nsec == static_cast<uint32_t>(T.tv_nsec));
}
bool operator!= (const timespec &T) const
{
return !(*this == T);
}
bool operator< (const timespec &T) const
{
return (tv_sec < static_cast<uint32_t>(T.tv_sec))
|| ((tv_sec == static_cast<uint32_t>(T.tv_sec))
&& (tv_nsec < static_cast<uint32_t>(T.tv_nsec)));
}
bool operator>= (const timespec &T) const
{
return !(*this < T);
}
bool operator> (const timespec &T) const
{
return (tv_sec > static_cast<uint32_t>(T.tv_sec))
|| ((tv_sec == static_cast<uint32_t>(T.tv_sec))
&& (tv_nsec > static_cast<uint32_t>(T.tv_nsec)));
}
bool operator<= (const timespec &T) const
{
return !(*this > T);
}
log_time operator-= (const timespec &T);
log_time operator- (const timespec &T) const
{
log_time local(*this);
return local -= T;
}
// log_time
bool operator== (const log_time &T) const
{
return (tv_sec == T.tv_sec) && (tv_nsec == T.tv_nsec);
}
bool operator!= (const log_time &T) const
{
return !(*this == T);
}
bool operator< (const log_time &T) const
{
return (tv_sec < T.tv_sec)
|| ((tv_sec == T.tv_sec) && (tv_nsec < T.tv_nsec));
}
bool operator>= (const log_time &T) const
{
return !(*this < T);
}
bool operator> (const log_time &T) const
{
return (tv_sec > T.tv_sec)
|| ((tv_sec == T.tv_sec) && (tv_nsec > T.tv_nsec));
}
bool operator<= (const log_time &T) const
{
return !(*this > T);
}
log_time operator-= (const log_time &T);
log_time operator- (const log_time &T) const
{
log_time local(*this);
return local -= T;
}
uint64_t nsec() const
{
return static_cast<uint64_t>(tv_sec) * NS_PER_SEC + tv_nsec;
}
static const char default_format[];
// Add %#q for the fraction of a second to the standard library functions
char *strptime(const char *s, const char *format = default_format);
} __attribute__((__packed__));
#else
typedef struct log_time {
uint32_t tv_sec;
uint32_t tv_nsec;
} __attribute__((__packed__)) log_time;
#endif
#endif /* define _LIBS_LOG_LOG_READ_H */
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