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1 //===--- tools/extra/clang-tidy/GlobList.cpp ------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "GlobList.h"
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10 #include "llvm/ADT/SmallString.h"
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11
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12 using namespace clang;
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13 using namespace tidy;
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14
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15 // Returns true if GlobList starts with the negative indicator ('-'), removes it
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16 // from the GlobList.
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17 static bool ConsumeNegativeIndicator(StringRef &GlobList) {
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18 GlobList = GlobList.trim(" \r\n");
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19 if (GlobList.startswith("-")) {
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20 GlobList = GlobList.substr(1);
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21 return true;
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22 }
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23 return false;
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24 }
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25
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26 // Converts first glob from the comma-separated list of globs to Regex and
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27 // removes it and the trailing comma from the GlobList.
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28 static llvm::Regex ConsumeGlob(StringRef &GlobList) {
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29 StringRef UntrimmedGlob = GlobList.substr(0, GlobList.find(','));
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30 StringRef Glob = UntrimmedGlob.trim(' ');
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31 GlobList = GlobList.substr(UntrimmedGlob.size() + 1);
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32 SmallString<128> RegexText("^");
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33 StringRef MetaChars("()^$|*+?.[]\\{}");
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34 for (char C : Glob) {
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35 if (C == '*')
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36 RegexText.push_back('.');
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37 else if (MetaChars.find(C) != StringRef::npos)
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38 RegexText.push_back('\\');
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39 RegexText.push_back(C);
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40 }
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41 RegexText.push_back('$');
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42 return llvm::Regex(RegexText);
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43 }
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44
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45 GlobList::GlobList(StringRef Globs) {
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46 do {
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47 GlobListItem Item;
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48 Item.IsPositive = !ConsumeNegativeIndicator(Globs);
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49 Item.Regex = ConsumeGlob(Globs);
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50 Items.push_back(std::move(Item));
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51 } while (!Globs.empty());
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52 }
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53
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54 bool GlobList::contains(StringRef S) {
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55 bool Contains = false;
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56 for (const GlobListItem &Item : Items) {
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57 if (Item.Regex.match(S))
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58 Contains = Item.IsPositive;
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59 }
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60 return Contains;
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61 }
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