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69 lines
2.2 KiB
Go
69 lines
2.2 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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