timeEpochNS() {
# Desc: Get epoch nanoseconds
# Usage: timeEpochNS
- # Version 0.2.0
+ # Version 0.2.3
# Input: arg1: 'date'-parsable timestamp string (optional)
# Output: Nanoseconds since 1970-01-01
- # Depends: date 8, yell()
+ # Depends: date 8, cut 8, yell()
# Ref/Attrib: Force base 10 Bash arith with '10#'. https://stackoverflow.com/a/24777667
- local TIME_CURRENT TIME_INPUT TIME_EPOCH_FLOAT TIME_EPOCH_NSFRAC
- local TIME_EPOCH_NS
+ local argTime timeCurrent timeInput timeEpochFloat timeEpochInt
+ local timeEpochNsFrac timeEpochNs
argTime="$1";
# Get Current Time
- TIME_CURRENT="$(date --iso-8601=ns)"; # Produce `date`-parsable current timestamp with resolution of 1 nanosecond.
+ timeCurrent="$(date --iso-8601=ns)"; # Produce `date`-parsable current timestamp with resolution of 1 nanosecond.
# Decide to parse current or supplied time
## Check if time argument empty
if [[ -z "$argTime" ]]; then
## T: Time argument empty, use current time
- TIME_INPUT="$TIME_CURRENT";
+ timeInput="$timeCurrent";
else
## F: Time argument exists, validate time
if date --date="$argTime" 1>/dev/null 2>&1; then
### T: Time argument is valid; use it
- TIME_INPUT="$argTime";
+ timeInput="$argTime";
else
### F: Time argument not valid; exit
yell "ERROR:Invalid time argument supplied. Exiting."; exit 1;
- fi
- fi
+ fi;
+ fi;
# Construct and deliver nanoseconds since 1970-01-01
- TIME_EPOCH_FLOAT="$(date --date="$TIME_INPUT" +%s.%N)"; # Save ssss.NNNNNNNNN
- TIME_EPOCH_INT="$(echo "$TIME_EPOCH_FLOAT" | cut -d. -f1)"; # Get ssss
- TIME_EPOCH_NSFRAC="$(echo "$TIME_EPOCH_FLOAT" | cut -d. -f2)"; # Get NNNNNNNNN
- TIME_EPOCH_NS="$(( (10#"$TIME_EPOCH_INT" * 1000000000) + (10#"$TIME_EPOCH_NSFRAC") ))";
- echo "$TIME_EPOCH_NS";
+ timeEpochFloat="$(date --date="$timeInput" +%s.%N)"; # Save ssss.NNNNNNNNN
+ timeEpochInt="$(echo "$timeEpochFloat" | cut -d. -f1)"; # Get ssss
+ timeEpochNsFrac="$(echo "$timeEpochFloat" | cut -d. -f2)"; # Get NNNNNNNNN
+ timeEpochNs="$(( (10#"$timeEpochInt" * 10**9) + (10#"$timeEpochNsFrac") ))";
+ echo "$timeEpochNs";
} # Nanoseconds since 1970-01-01
#==BEGIN sample code==