diff options
Diffstat (limited to 'vendor/github.com/ethereum/go-ethereum/common/format.go')
-rw-r--r-- | vendor/github.com/ethereum/go-ethereum/common/format.go | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/vendor/github.com/ethereum/go-ethereum/common/format.go b/vendor/github.com/ethereum/go-ethereum/common/format.go new file mode 100644 index 000000000..6fc21af71 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/format.go @@ -0,0 +1,82 @@ +// Copyright 2016 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package common + +import ( + "fmt" + "regexp" + "strings" + "time" +) + +// PrettyDuration is a pretty printed version of a time.Duration value that cuts +// the unnecessary precision off from the formatted textual representation. +type PrettyDuration time.Duration + +var prettyDurationRe = regexp.MustCompile(`\.[0-9]+`) + +// String implements the Stringer interface, allowing pretty printing of duration +// values rounded to three decimals. +func (d PrettyDuration) String() string { + label := fmt.Sprintf("%v", time.Duration(d)) + if match := prettyDurationRe.FindString(label); len(match) > 4 { + label = strings.Replace(label, match, match[:4], 1) + } + return label +} + +// PrettyAge is a pretty printed version of a time.Duration value that rounds +// the values up to a single most significant unit, days/weeks/years included. +type PrettyAge time.Time + +// ageUnits is a list of units the age pretty printing uses. +var ageUnits = []struct { + Size time.Duration + Symbol string +}{ + {12 * 30 * 24 * time.Hour, "y"}, + {30 * 24 * time.Hour, "mo"}, + {7 * 24 * time.Hour, "w"}, + {24 * time.Hour, "d"}, + {time.Hour, "h"}, + {time.Minute, "m"}, + {time.Second, "s"}, +} + +// String implements the Stringer interface, allowing pretty printing of duration +// values rounded to the most significant time unit. +func (t PrettyAge) String() string { + // Calculate the time difference and handle the 0 cornercase + diff := time.Since(time.Time(t)) + if diff < time.Second { + return "0" + } + // Accumulate a precision of 3 components before returning + result, prec := "", 0 + + for _, unit := range ageUnits { + if diff > unit.Size { + result = fmt.Sprintf("%s%d%s", result, diff/unit.Size, unit.Symbol) + diff %= unit.Size + + if prec += 1; prec >= 3 { + break + } + } + } + return result +} |