79 lines
1.7 KiB
Go
79 lines
1.7 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
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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 common
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import "sort"
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func JoinWithPrefix(strs []string, prefix string) string {
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if len(strs) == 0 {
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return ""
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}
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if len(strs) == 1 {
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return prefix + strs[0]
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}
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n := len(" ") * (len(strs) - 1)
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for _, s := range strs {
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n += len(prefix) + len(s)
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}
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ret := make([]byte, 0, n)
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for i, s := range strs {
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if i != 0 {
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ret = append(ret, ' ')
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}
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ret = append(ret, prefix...)
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ret = append(ret, s...)
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}
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return string(ret)
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}
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func JoinWithPrefixAndQuote(strs []string, prefix string) string {
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if len(strs) == 0 {
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return ""
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}
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if len(strs) == 1 {
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return prefix + `"` + strs[0] + `"`
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}
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n := len(" ") * (len(strs) - 1)
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for _, s := range strs {
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n += len(prefix) + len(s) + len(`""`)
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}
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ret := make([]byte, 0, n)
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for i, s := range strs {
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if i != 0 {
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ret = append(ret, ' ')
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}
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ret = append(ret, prefix...)
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ret = append(ret, '"')
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ret = append(ret, s...)
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ret = append(ret, '"')
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}
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return string(ret)
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}
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func sortedKeys(m map[string][]string) []string {
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s := make([]string, 0, len(m))
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for k := range m {
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s = append(s, k)
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}
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sort.Strings(s)
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return s
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}
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