Bumped influxdb to 0.12.2 in Godeps

vendor/github.com/influxdata/influxdb/models/time.go

@@ -0,0 +1,51 @@
+package models
+
+// Helper time methods since parsing time can easily overflow and we only support a
+// specific time range.
+
+import (
+	"fmt"
+	"math"
+	"time"
+)
+
+var (
+	// MaxNanoTime is the maximum time that can be represented via int64 nanoseconds since the epoch.
+	MaxNanoTime = time.Unix(0, math.MaxInt64).UTC()
+	// MinNanoTime is the minumum time that can be represented via int64 nanoseconds since the epoch.
+	MinNanoTime = time.Unix(0, math.MinInt64).UTC()
+
+	// ErrTimeOutOfRange gets returned when time is out of the representable range using int64 nanoseconds since the epoch.
+	ErrTimeOutOfRange = fmt.Errorf("time outside range %s - %s", MinNanoTime, MaxNanoTime)
+)
+
+// SafeCalcTime safely calculates the time given. Will return error if the time is outside the
+// supported range.
+func SafeCalcTime(timestamp int64, precision string) (time.Time, error) {
+	mult := GetPrecisionMultiplier(precision)
+	if t, ok := safeSignedMult(timestamp, mult); ok {
+		return time.Unix(0, t).UTC(), nil
+	}
+
+	return time.Time{}, ErrTimeOutOfRange
+}
+
+// CheckTime checks that a time is within the safe range.
+func CheckTime(t time.Time) error {
+	if t.Before(MinNanoTime) || t.After(MaxNanoTime) {
+		return ErrTimeOutOfRange
+	}
+	return nil
+}
+
+// Perform the multiplication and check to make sure it didn't overflow.
+func safeSignedMult(a, b int64) (int64, bool) {
+	if a == 0 || b == 0 || a == 1 || b == 1 {
+		return a * b, true
+	}
+	if a == math.MinInt64 || b == math.MaxInt64 {
+		return 0, false
+	}
+	c := a * b
+	return c, c/b == a
+}