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1 //===--- FileExtensionsUtils.cpp - clang-tidy -------------------*- C++ -*-===//
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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 "FileExtensionsUtils.h"
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10 #include "clang/Basic/CharInfo.h"
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11 #include "llvm/Support/Path.h"
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252
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12 #include <optional>
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13
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14 namespace clang::tidy::utils {
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15
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16 bool isExpansionLocInHeaderFile(SourceLocation Loc, const SourceManager &SM,
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17 const FileExtensionsSet &HeaderFileExtensions) {
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18 SourceLocation ExpansionLoc = SM.getExpansionLoc(Loc);
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19 return isFileExtension(SM.getFilename(ExpansionLoc), HeaderFileExtensions);
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20 }
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21
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22 bool isPresumedLocInHeaderFile(SourceLocation Loc, SourceManager &SM,
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23 const FileExtensionsSet &HeaderFileExtensions) {
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24 PresumedLoc PresumedLocation = SM.getPresumedLoc(Loc);
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25 return isFileExtension(PresumedLocation.getFilename(), HeaderFileExtensions);
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26 }
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27
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28 bool isSpellingLocInHeaderFile(SourceLocation Loc, SourceManager &SM,
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29 const FileExtensionsSet &HeaderFileExtensions) {
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30 SourceLocation SpellingLoc = SM.getSpellingLoc(Loc);
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31 return isFileExtension(SM.getFilename(SpellingLoc), HeaderFileExtensions);
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32 }
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33
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34 bool parseFileExtensions(StringRef AllFileExtensions,
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35 FileExtensionsSet &FileExtensions,
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36 StringRef Delimiters) {
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37 SmallVector<StringRef, 5> Suffixes;
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38 for (char Delimiter : Delimiters) {
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39 if (AllFileExtensions.contains(Delimiter)) {
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40 AllFileExtensions.split(Suffixes, Delimiter);
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41 break;
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42 }
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43 }
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44
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45 FileExtensions.clear();
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46 for (StringRef Suffix : Suffixes) {
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47 StringRef Extension = Suffix.trim();
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48 if (!llvm::all_of(Extension, isAlphanumeric))
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49 return false;
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50 FileExtensions.insert(Extension);
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51 }
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52 return true;
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53 }
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54
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55 std::optional<StringRef>
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56 getFileExtension(StringRef FileName, const FileExtensionsSet &FileExtensions) {
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57 StringRef Extension = llvm::sys::path::extension(FileName);
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58 if (Extension.empty())
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59 return std::nullopt;
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60 // Skip "." prefix.
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61 if (!FileExtensions.count(Extension.substr(1)))
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62 return std::nullopt;
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63 return Extension;
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64 }
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65
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66 bool isFileExtension(StringRef FileName,
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67 const FileExtensionsSet &FileExtensions) {
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68 return getFileExtension(FileName, FileExtensions).has_value();
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69 }
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70
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71 } // namespace clang::tidy::utils
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