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unit.go
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unit.go
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// Copyright 2018 The Chubao Authors.
//
// 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.
package util
import "regexp"
const (
_ = iota
KB = 1 << (10 * iota)
MB
GB
TB
PB
DefaultDataPartitionSize = 120 * GB
TaskWorkerInterval = 1
)
const (
BlockCount = 1024
BlockSize = 65536 * 2
ReadBlockSize = BlockSize
PerBlockCrcSize = 4
ExtentSize = BlockCount * BlockSize
PacketHeaderSize = 57
BlockHeaderSize = 4096
)
const (
DefaultTinySizeLimit = 1 * MB // TODO explain tiny extent?
)
func Min(a, b int) int {
if a > b {
return b
}
return a
}
func Max(a, b int) int {
if a > b {
return a
}
return b
}
// IsIPV4 returns if it is IPV4 address.
func IsIPV4(val interface{}) bool {
ip4Pattern := `((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)`
ip4 := regexpCompile(ip4Pattern)
return isMatch(ip4, val)
}
func regexpCompile(str string) *regexp.Regexp {
return regexp.MustCompile("^" + str + "$")
}
func isMatch(exp *regexp.Regexp, val interface{}) bool {
switch v := val.(type) {
case []rune:
return exp.MatchString(string(v))
case []byte:
return exp.Match(v)
case string:
return exp.MatchString(v)
default:
return false
}
}