1 //===--- FileExtensionsUtils.cpp - clang-tidy -------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "FileExtensionsUtils.h"
10 #include "clang/Basic/CharInfo.h"
11 #include "llvm/Support/Path.h"
12 #include <optional>
13
14 namespace clang::tidy::utils {
15
isExpansionLocInHeaderFile(SourceLocation Loc,const SourceManager & SM,const FileExtensionsSet & HeaderFileExtensions)16 bool isExpansionLocInHeaderFile(SourceLocation Loc, const SourceManager &SM,
17 const FileExtensionsSet &HeaderFileExtensions) {
18 SourceLocation ExpansionLoc = SM.getExpansionLoc(Loc);
19 return isFileExtension(SM.getFilename(ExpansionLoc), HeaderFileExtensions);
20 }
21
isPresumedLocInHeaderFile(SourceLocation Loc,SourceManager & SM,const FileExtensionsSet & HeaderFileExtensions)22 bool isPresumedLocInHeaderFile(SourceLocation Loc, SourceManager &SM,
23 const FileExtensionsSet &HeaderFileExtensions) {
24 PresumedLoc PresumedLocation = SM.getPresumedLoc(Loc);
25 return isFileExtension(PresumedLocation.getFilename(), HeaderFileExtensions);
26 }
27
isSpellingLocInHeaderFile(SourceLocation Loc,SourceManager & SM,const FileExtensionsSet & HeaderFileExtensions)28 bool isSpellingLocInHeaderFile(SourceLocation Loc, SourceManager &SM,
29 const FileExtensionsSet &HeaderFileExtensions) {
30 SourceLocation SpellingLoc = SM.getSpellingLoc(Loc);
31 return isFileExtension(SM.getFilename(SpellingLoc), HeaderFileExtensions);
32 }
33
parseFileExtensions(StringRef AllFileExtensions,FileExtensionsSet & FileExtensions,StringRef Delimiters)34 bool parseFileExtensions(StringRef AllFileExtensions,
35 FileExtensionsSet &FileExtensions,
36 StringRef Delimiters) {
37 SmallVector<StringRef, 5> Suffixes;
38 for (char Delimiter : Delimiters) {
39 if (AllFileExtensions.contains(Delimiter)) {
40 AllFileExtensions.split(Suffixes, Delimiter);
41 break;
42 }
43 }
44
45 FileExtensions.clear();
46 for (StringRef Suffix : Suffixes) {
47 StringRef Extension = Suffix.trim();
48 if (!llvm::all_of(Extension, isAlphanumeric))
49 return false;
50 FileExtensions.insert(Extension);
51 }
52 return true;
53 }
54
55 std::optional<StringRef>
getFileExtension(StringRef FileName,const FileExtensionsSet & FileExtensions)56 getFileExtension(StringRef FileName, const FileExtensionsSet &FileExtensions) {
57 StringRef Extension = llvm::sys::path::extension(FileName);
58 if (Extension.empty())
59 return std::nullopt;
60 // Skip "." prefix.
61 if (!FileExtensions.count(Extension.substr(1)))
62 return std::nullopt;
63 return Extension;
64 }
65
isFileExtension(StringRef FileName,const FileExtensionsSet & FileExtensions)66 bool isFileExtension(StringRef FileName,
67 const FileExtensionsSet &FileExtensions) {
68 return getFileExtension(FileName, FileExtensions).has_value();
69 }
70
71 } // namespace clang::tidy::utils
72