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@ -4,6 +4,7 @@ import (
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"regexp"
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"strconv"
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"strings"
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"sync"
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)
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type ConstraintGroup struct {
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@ -241,8 +242,38 @@ func (self *ConstraintGroup) parseConstraint(constraint string) []*Constraint {
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return []*Constraint{{constraint, stabilityModifier}}
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}
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// PCRegMap : PreCompiled Regex Map
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type PCRegMap struct {
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sync.RWMutex
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m map[string]*regexp.Regexp
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}
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// MustCompile : to replace regexp.MustCompile in RegFind.
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func (p *PCRegMap) MustCompile(pattern string) *regexp.Regexp {
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p.RLock()
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ret, exist := p.m[pattern]
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p.RUnlock()
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if exist {
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return ret
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}
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ret = regexp.MustCompile(pattern)
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p.Lock()
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p.m[pattern] = ret
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p.Unlock()
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return ret
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}
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var (
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regexpCache *PCRegMap
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)
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func init() {
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regexpCache = new(PCRegMap)
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regexpCache.m = make(map[string]*regexp.Regexp)
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}
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func RegFind(pattern, subject string) []string {
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reg := regexp.MustCompile(pattern)
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reg := regexpCache.MustCompile(pattern)
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matched := reg.FindAllStringSubmatch(subject, -1)
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if matched != nil {
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Lunny Xiao
5 years ago
committed by
techknowlogick