e259a5fd0d
Summary: This is a NFC change. Reviewers: kadircet Reviewed By: kadircet Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, usaxena95, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D67960 llvm-svn: 372841
69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
//===--- HeaderSourceSwitch.cpp - --------------------------------*- C++-*-===//
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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 "HeaderSourceSwitch.h"
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namespace clang {
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namespace clangd {
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llvm::Optional<Path> getCorrespondingHeaderOrSource(
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const Path &OriginalFile,
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llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS) {
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llvm::StringRef SourceExtensions[] = {".cpp", ".c", ".cc", ".cxx",
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".c++", ".m", ".mm"};
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llvm::StringRef HeaderExtensions[] = {".h", ".hh", ".hpp", ".hxx", ".inc"};
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llvm::StringRef PathExt = llvm::sys::path::extension(OriginalFile);
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// Lookup in a list of known extensions.
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auto SourceIter =
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llvm::find_if(SourceExtensions, [&PathExt](PathRef SourceExt) {
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return SourceExt.equals_lower(PathExt);
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});
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bool IsSource = SourceIter != std::end(SourceExtensions);
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auto HeaderIter =
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llvm::find_if(HeaderExtensions, [&PathExt](PathRef HeaderExt) {
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return HeaderExt.equals_lower(PathExt);
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});
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bool IsHeader = HeaderIter != std::end(HeaderExtensions);
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// We can only switch between the known extensions.
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if (!IsSource && !IsHeader)
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return None;
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// Array to lookup extensions for the switch. An opposite of where original
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// extension was found.
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llvm::ArrayRef<llvm::StringRef> NewExts;
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if (IsSource)
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NewExts = HeaderExtensions;
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else
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NewExts = SourceExtensions;
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// Storage for the new path.
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llvm::SmallString<128> NewPath = llvm::StringRef(OriginalFile);
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// Loop through switched extension candidates.
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for (llvm::StringRef NewExt : NewExts) {
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llvm::sys::path::replace_extension(NewPath, NewExt);
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if (VFS->exists(NewPath))
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return NewPath.str().str(); // First str() to convert from SmallString to
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// StringRef, second to convert from StringRef
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// to std::string
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// Also check NewExt in upper-case, just in case.
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llvm::sys::path::replace_extension(NewPath, NewExt.upper());
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if (VFS->exists(NewPath))
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return NewPath.str().str();
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}
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return None;
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}
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} // namespace clangd
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} // namespace clang
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