d2dbb8c963
* cli: initial work on debug; server-status target * debug: add metrics capture target (#7376) * check against DR secondary * debug: add compression * refactor check into preflight func * debug: set short test time on tests, fix exit code bug * debug: use temp dir for output on tests * debug: use mholt/archiver for compression * first pass on adding pprof * use logger for output * refactor polling target capture logic * debug: poll and collect replication status * debug: poll and collect host-info; rename output files and collection refactor * fix comments * add archive test; fix bugs found * rename flag name to singular target * add target output test; scaffold other tests cases * debug/test: add pprof and index file tests * debug/test: add min timing check tests * debug: fix index gen race and collection goroutine race * debug: extend archive tests, handle race between program exit and polling goroutines * update docstring * debug: correctly add to pollingWg * debug: add config target support * debug: don't wait on interrupt shutdown; add file exists unit tests * move pprof bits into its goroutine * debug: skip empty metrics and some pprof file creation if permission denied, add matching unit test * address comments and feedback * Vault debug using run.Group (#7658) * debug: switch to use oklog/run.Group * debug: use context to cancel requests and interrupt rungroups. * debug: trigger the first interval properly * debug: metrics collection should use metrics interval * debug: add missing continue on metrics error * debug: remove the use of buffered chan to trigger first interval * debug: don't shadow BaseCommand's client, properly block on interval capture failures * debug: actually use c.cachedClient everywhere * go mod vendor * debug: run all pprof in goroutines; bump pprof timings in tests to reduce flakiness * debug: update help text
70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
// Copyright 2014-2017 Ulrich Kunitz. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package lzma
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import (
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"errors"
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"fmt"
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)
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// maximum and minimum values for the LZMA properties.
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const (
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minPB = 0
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maxPB = 4
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)
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// maxPropertyCode is the possible maximum of a properties code byte.
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const maxPropertyCode = (maxPB+1)*(maxLP+1)*(maxLC+1) - 1
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// Properties contains the parameters LC, LP and PB. The parameter LC
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// defines the number of literal context bits; parameter LP the number
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// of literal position bits and PB the number of position bits.
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type Properties struct {
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LC int
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LP int
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PB int
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}
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// String returns the properties in a string representation.
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func (p *Properties) String() string {
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return fmt.Sprintf("LC %d LP %d PB %d", p.LC, p.LP, p.PB)
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}
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// PropertiesForCode converts a properties code byte into a Properties value.
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func PropertiesForCode(code byte) (p Properties, err error) {
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if code > maxPropertyCode {
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return p, errors.New("lzma: invalid properties code")
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}
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p.LC = int(code % 9)
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code /= 9
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p.LP = int(code % 5)
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code /= 5
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p.PB = int(code % 5)
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return p, err
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}
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// verify checks the properties for correctness.
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func (p *Properties) verify() error {
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if p == nil {
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return errors.New("lzma: properties are nil")
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}
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if !(minLC <= p.LC && p.LC <= maxLC) {
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return errors.New("lzma: lc out of range")
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}
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if !(minLP <= p.LP && p.LP <= maxLP) {
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return errors.New("lzma: lp out of range")
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}
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if !(minPB <= p.PB && p.PB <= maxPB) {
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return errors.New("lzma: pb out of range")
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}
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return nil
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}
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// Code converts the properties to a byte. The function assumes that
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// the properties components are all in range.
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func (p Properties) Code() byte {
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return byte((p.PB*5+p.LP)*9 + p.LC)
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}
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