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/* |
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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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// Does only wildcard '*' match.
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return deepMatchRune([]rune(name), []rune(pattern), true) |
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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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// Does extended wildcard '*' and '?' match.
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return deepMatchRune([]rune(name), []rune(pattern), false) |
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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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