84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
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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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*/
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package wildcard
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// MatchSimple - finds whether the text matches/satisfies the pattern string.
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// supports only '*' wildcard in the pattern.
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// considers a file system path as a flat name space.
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func MatchSimple(pattern, name string) bool {
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if pattern == "" {
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return name == pattern
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}
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if pattern == "*" {
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return true
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}
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rname := make([]rune, 0, len(name))
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rpattern := make([]rune, 0, len(pattern))
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for _, r := range name {
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rname = append(rname, r)
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}
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for _, r := range pattern {
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rpattern = append(rpattern, r)
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}
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simple := true // Does only wildcard '*' match.
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return deepMatchRune(rname, rpattern, simple)
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}
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// Match - finds whether the text matches/satisfies the pattern string.
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// supports '*' and '?' wildcards in the pattern string.
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// unlike path.Match(), considers a path as a flat name space while matching the pattern.
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// The difference is illustrated in the example here https://play.golang.org/p/Ega9qgD4Qz .
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func Match(pattern, name string) (matched bool) {
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if pattern == "" {
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return name == pattern
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}
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if pattern == "*" {
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return true
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}
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rname := make([]rune, 0, len(name))
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rpattern := make([]rune, 0, len(pattern))
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for _, r := range name {
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rname = append(rname, r)
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}
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for _, r := range pattern {
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rpattern = append(rpattern, r)
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}
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simple := false // Does extended wildcard '*' and '?' match.
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return deepMatchRune(rname, rpattern, simple)
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}
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func deepMatchRune(str, pattern []rune, simple bool) bool {
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for len(pattern) > 0 {
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switch pattern[0] {
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default:
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if len(str) == 0 || str[0] != pattern[0] {
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return false
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}
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case '?':
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if len(str) == 0 && !simple {
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return false
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}
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case '*':
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return deepMatchRune(str, pattern[1:], simple) ||
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(len(str) > 0 && deepMatchRune(str[1:], pattern, simple))
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}
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str = str[1:]
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pattern = pattern[1:]
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}
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return len(str) == 0 && len(pattern) == 0
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}
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