88 lines
1.9 KiB
Go
88 lines
1.9 KiB
Go
// Copyright 2015 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 utils
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import (
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"crypto/sha1"
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"encoding/hex"
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"regexp"
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)
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var urlParametersRegexp = regexp.MustCompile(`(\?|\&)([^=]+)\=([^ &]+)`)
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// Hash returns an unique hash of the given string.
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func Hash(str string) string {
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h := sha1.New()
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h.Write([]byte(str))
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bs := h.Sum(nil)
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return hex.EncodeToString(bs)
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}
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// CleanURL removes all parameters from an URL.
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func CleanURL(str string) string {
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return urlParametersRegexp.ReplaceAllString(str, "")
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}
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// Contains looks for a string into an array of strings and returns whether
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// the string exists.
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func Contains(needle string, haystack []string) bool {
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for _, h := range haystack {
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if h == needle {
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return true
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}
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}
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return false
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}
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// CompareStringLists returns the strings that are present in X but not in Y.
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func CompareStringLists(X, Y []string) []string {
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m := make(map[string]bool)
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for _, y := range Y {
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m[y] = true
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}
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diff := []string{}
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for _, x := range X {
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if m[x] {
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continue
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}
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diff = append(diff, x)
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m[x] = true
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}
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return diff
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}
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// CompareStringListsInBoth returns the strings that are present in both X and Y.
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func CompareStringListsInBoth(X, Y []string) []string {
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m := make(map[string]struct{})
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for _, y := range Y {
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m[y] = struct{}{}
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}
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diff := []string{}
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for _, x := range X {
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if _, e := m[x]; e {
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diff = append(diff, x)
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delete(m, x)
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}
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}
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return diff
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}
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