77 lines
1.6 KiB
Go
77 lines
1.6 KiB
Go
// Copyright 2016 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package nodejs
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import (
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"strings"
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"unicode"
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)
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type operVersion struct {
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Oper string
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Version string
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}
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type ovState string
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const (
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ovStateInit ovState = "init"
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ovStateOper ovState = "operation"
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ovStateVersion ovState = "version"
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)
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func isOper(ch rune) bool {
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return ch == '>' || ch == '<' || ch == '='
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}
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func getOperVersions(content string) (ovs []operVersion) {
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state := ovStateInit
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begin := 0
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var ov operVersion
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for i, ch := range content {
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if unicode.IsSpace(ch) {
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continue
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}
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switch state {
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case ovStateInit:
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if isOper(ch) {
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state = ovStateOper
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begin = i
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} else {
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return nil
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}
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case ovStateOper:
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if !isOper(ch) {
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state = ovStateVersion
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ov.Oper = strings.TrimSpace(content[begin:i])
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begin = i
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}
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case ovStateVersion:
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if isOper(ch) {
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state = ovStateOper
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ov.Version = strings.TrimSpace(content[begin:i])
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ovs = append(ovs, ov)
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begin = i
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}
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}
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}
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if state == ovStateVersion {
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ov.Version = strings.TrimSpace(content[begin:len(content)])
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ovs = append(ovs, ov)
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}
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return
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}
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