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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
techknowlogick