53 lines
1.9 KiB
Rust
53 lines
1.9 KiB
Rust
#![allow(clippy::all)]
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// Copied from regex_syntax crate to avoid pulling in the whole crate just for a utility function
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// https://github.com/rust-lang/regex/blob/431c4e4867e1eb33eb39b23ed47c9934b2672f8f/regex-syntax/src/lib.rs
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//
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// Copyright (c) 2014 The Rust Project Developers
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//
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// Permission is hereby granted, free of charge, to any
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// person obtaining a copy of this software and associated
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// documentation files (the "Software"), to deal in the
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// Software without restriction, including without
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// limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software
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// is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice
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// shall be included in all copies or substantial portions
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// of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
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// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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pub fn escape(text: &str) -> String {
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let mut quoted = String::new();
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escape_into(text, &mut quoted);
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quoted
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}
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fn escape_into(text: &str, buf: &mut String) {
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buf.reserve(text.len());
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for c in text.chars() {
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if is_meta_character(c) {
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buf.push('\\');
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}
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buf.push(c);
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}
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}
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fn is_meta_character(c: char) -> bool {
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match c {
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'\\' | '.' | '+' | '*' | '?' | '(' | ')' | '|' | '[' | ']' | '{' | '}' | '^' | '$'
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| '#' | '&' | '-' | '~' => true,
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_ => false,
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}
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}
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