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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package common
func JoinWithPrefix(strs []string, prefix string) string {
if len(strs) == 0 {
return ""
}
if len(strs) == 1 {
return prefix + strs[0]
}
n := len(" ") * (len(strs) - 1)
for _, s := range strs {
n += len(prefix) + len(s)
}
ret := make([]byte, 0, n)
for i, s := range strs {
if i != 0 {
ret = append(ret, ' ')
}
ret = append(ret, prefix...)
ret = append(ret, s...)
}
return string(ret)
}
func JoinWithPrefixAndQuote(strs []string, prefix string) string {
if len(strs) == 0 {
return ""
}
if len(strs) == 1 {
return prefix + `"` + strs[0] + `"`
}
n := len(" ") * (len(strs) - 1)
for _, s := range strs {
n += len(prefix) + len(s) + len(`""`)
}
ret := make([]byte, 0, n)
for i, s := range strs {
if i != 0 {
ret = append(ret, ' ')
}
ret = append(ret, prefix...)
ret = append(ret, '"')
ret = append(ret, s...)
ret = append(ret, '"')
}
return string(ret)
}
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