GRU - Generic Reusable Utilities
Functions
gru_time_utils.c File Reference
#include "gru_time_utils.h"

Functions

void gru_time_add_microseconds (gru_timestamp_t *t, uint64_t count)
 Copyright 2016 Otavio Rodolfo Piske. More...
 
void gru_time_add_seconds (gru_timestamp_t *t, uint64_t count)
 Add seconds to a timestamp object. More...
 
void gru_time_add_minutes (gru_timestamp_t *t, uint64_t count)
 Add minutes to a timestamp object. More...
 
void gru_time_add_hours (gru_timestamp_t *t, uint64_t count)
 Add hours to a timestamp object. More...
 
void gru_time_add_days (gru_timestamp_t *t, uint64_t count)
 Add days to a timestamp object. More...
 
gru_timestamp_t gru_time_read_str (const char *str)
 Read a string in the format seconds.microseconds and return a struct timeval. More...
 
char * gru_time_write_str (const gru_timestamp_t *t)
 Write a timeval structure to a string. More...
 
char * gru_time_write_format (const gru_timestamp_t *t, const char *format, gru_status_t *status)
 Writes the input timestamp value according to the given format. More...
 
gru_timestamp_t gru_time_now ()
 Gets the current moment in time. More...
 
uint64_t gru_time_now_milli ()
 Gets the current moment in time in milliseconds. More...
 
gru_timestamp_t gru_time_from_milli (int64_t timestamp)
 Converts milliseconds since epoch to a timestamp. More...
 
gru_timestamp_t gru_time_from_milli_char (const char *ts)
 Converts an unformatted string of milliseconds since epoch to a timestamp. More...
 
int64_t gru_time_to_milli (const gru_timestamp_t *ts)
 Converts a timestamp to milliseconds. More...
 
int64_t gru_time_elapsed_secs (gru_timestamp_t start, gru_timestamp_t end)
 Calculates the elapsed time between two timestamps. More...
 
int64_t gru_time_elapsed_milli (gru_timestamp_t start, gru_timestamp_t end)
 Calculates the elapsed time between two timestamps. More...
 

Function Documentation

◆ gru_time_add_days()

void gru_time_add_days ( gru_timestamp_t t,
uint64_t  count 
)

Add days to a timestamp object.

Parameters
ttimestamp
countnumber of days to add

◆ gru_time_add_hours()

void gru_time_add_hours ( gru_timestamp_t t,
uint64_t  count 
)

Add hours to a timestamp object.

Parameters
ttimestamp
countnumber of hours to add

◆ gru_time_add_microseconds()

void gru_time_add_microseconds ( gru_timestamp_t t,
uint64_t  count 
)

Copyright 2016 Otavio Rodolfo Piske.

Add microseconds to a timestamp object.

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.

◆ gru_time_add_minutes()

void gru_time_add_minutes ( gru_timestamp_t t,
uint64_t  count 
)

Add minutes to a timestamp object.

Parameters
ttimestamp
countnumber of minutes to add

◆ gru_time_add_seconds()

void gru_time_add_seconds ( gru_timestamp_t t,
uint64_t  count 
)

Add seconds to a timestamp object.

Parameters
ttimestamp
countnumber of seconds to add

◆ gru_time_elapsed_milli()

int64_t gru_time_elapsed_milli ( gru_timestamp_t  start,
gru_timestamp_t  end 
)

Calculates the elapsed time between two timestamps.

Parameters
startStart time
endEnd time
Note
The behavior is undefined if the end time is smaller than the start time
Returns
The elapsed time in milliseconds

◆ gru_time_elapsed_secs()

int64_t gru_time_elapsed_secs ( gru_timestamp_t  start,
gru_timestamp_t  end 
)

Calculates the elapsed time between two timestamps.

Parameters
startStart time
endEnd time
Note
The behavior is undefined if the end time is smaller than the start time
Returns
The elapsed time in seconds

◆ gru_time_from_milli()

gru_timestamp_t gru_time_from_milli ( int64_t  timestamp)

Converts milliseconds since epoch to a timestamp.

Parameters
timestampmilliseconds since Epoch
Returns
a timestamp object with the converted data

◆ gru_time_from_milli_char()

gru_timestamp_t gru_time_from_milli_char ( const char *  ts)

Converts an unformatted string of milliseconds since epoch to a timestamp.

Parameters
tsA numeric string representing the milliseconds since epoch (ie.: 1484719545264)
Returns
a timestamp object with the parsed data

◆ gru_time_now()

gru_timestamp_t gru_time_now ( )

Gets the current moment in time.

Returns
a timestamp object with the current point in time

◆ gru_time_now_milli()

uint64_t gru_time_now_milli ( )

Gets the current moment in time in milliseconds.

Returns
current time in milliseconds since Epoch

◆ gru_time_read_str()

gru_timestamp_t gru_time_read_str ( const char *  str)

Read a string in the format seconds.microseconds and return a struct timeval.

The microseconds represents the fraction of the seconds value and should not be equal or greater than 1000000. Otherwise, the code will only consider the first 6 bytes of the microseconds string.

Parameters
strThe string in the format seconds.microseconds
Returns
a timestamp object with the parsed data
Examples
time/gru_time_conversion_test.c, and time/gru_time_read_test.c.

◆ gru_time_to_milli()

int64_t gru_time_to_milli ( const gru_timestamp_t ts)

Converts a timestamp to milliseconds.

Parameters
tsA pointer to a timestamp structure
Returns
the timestamp as a milliseconds since epoch
Examples
time/gru_time_conversion_test.c.

◆ gru_time_write_format()

char* gru_time_write_format ( const gru_timestamp_t t,
const char *  format,
gru_status_t status 
)

Writes the input timestamp value according to the given format.

Parameters
tInput timestamp structure
formatoutput format
statusstatus structure that may contain error details in case of failure
Returns
A pointer to a formatted string or NULL in case of failure. The returned string must be free'd after use

◆ gru_time_write_str()

char* gru_time_write_str ( const gru_timestamp_t t)

Write a timeval structure to a string.

Parameters
tthe timeval structure
Returns
A string that must be free'd after use
Examples
time/gru_time_read_test.c.