forked from OSchip/llvm-project
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
//===--- tools/extra/clang-tidy/GlobList.cpp ------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "GlobList.h"
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#include "llvm/ADT/SmallString.h"
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using namespace clang;
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using namespace tidy;
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// Returns true if GlobList starts with the negative indicator ('-'), removes it
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// from the GlobList.
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static bool consumeNegativeIndicator(StringRef &GlobList) {
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GlobList = GlobList.trim();
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if (GlobList.startswith("-")) {
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GlobList = GlobList.substr(1);
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return true;
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}
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return false;
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}
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// Converts first glob from the comma-separated list of globs to Regex and
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// removes it and the trailing comma from the GlobList.
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static llvm::Regex consumeGlob(StringRef &GlobList) {
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StringRef UntrimmedGlob = GlobList.substr(0, GlobList.find(','));
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StringRef Glob = UntrimmedGlob.trim();
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GlobList = GlobList.substr(UntrimmedGlob.size() + 1);
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SmallString<128> RegexText("^");
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StringRef MetaChars("()^$|*+?.[]\\{}");
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for (char C : Glob) {
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if (C == '*')
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RegexText.push_back('.');
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else if (MetaChars.contains(C))
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RegexText.push_back('\\');
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RegexText.push_back(C);
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}
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RegexText.push_back('$');
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return llvm::Regex(RegexText);
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}
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GlobList::GlobList(StringRef Globs) {
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Items.reserve(Globs.count(',') + 1);
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do {
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GlobListItem Item;
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Item.IsPositive = !consumeNegativeIndicator(Globs);
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Item.Regex = consumeGlob(Globs);
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Items.push_back(std::move(Item));
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} while (!Globs.empty());
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}
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bool GlobList::contains(StringRef S) const {
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// Iterating the container backwards as the last match determins if S is in
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// the list.
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for (const GlobListItem &Item : llvm::reverse(Items)) {
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if (Item.Regex.match(S))
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return Item.IsPositive;
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}
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return false;
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}
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