1//===--- Path.cpp -------------------------------------------*- 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 "support/Path.h"
10#include "llvm/Support/Path.h"
11namespace clang {
12namespace clangd {
13
14#ifdef CLANGD_PATH_CASE_INSENSITIVE
15std::string maybeCaseFoldPath(PathRef Path) { return Path.lower(); }
16bool pathEqual(PathRef A, PathRef B) { return A.equals_insensitive(B); }
17#else // NOT CLANGD_PATH_CASE_INSENSITIVE
18std::string maybeCaseFoldPath(PathRef Path) { return Path.str(); }
19bool pathEqual(PathRef A, PathRef B) { return A == B; }
20#endif // CLANGD_PATH_CASE_INSENSITIVE
21
22PathRef absoluteParent(PathRef Path) {
23 assert(llvm::sys::path::is_absolute(Path));
24#if defined(_WIN32)
25 // llvm::sys says "C:\" is absolute, and its parent is "C:" which is relative.
26 // This unhelpful behavior seems to have been inherited from boost.
27 if (llvm::sys::path::relative_path(Path).empty()) {
28 return PathRef();
29 }
30#endif
31 PathRef Result = llvm::sys::path::parent_path(path: Path);
32 assert(Result.empty() || llvm::sys::path::is_absolute(Result));
33 return Result;
34}
35
36bool pathStartsWith(PathRef Ancestor, PathRef Path,
37 llvm::sys::path::Style Style) {
38 assert(llvm::sys::path::is_absolute(Ancestor) &&
39 llvm::sys::path::is_absolute(Path));
40 // If ancestor ends with a separator drop that, so that we can match /foo/ as
41 // a parent of /foo.
42 if (llvm::sys::path::is_separator(value: Ancestor.back(), style: Style))
43 Ancestor = Ancestor.drop_back();
44 // Ensure Path starts with Ancestor.
45 if (!pathEqual(A: Ancestor, B: Path.take_front(N: Ancestor.size())))
46 return false;
47 Path = Path.drop_front(N: Ancestor.size());
48 // Then make sure either two paths are equal or Path has a separator
49 // afterwards.
50 return Path.empty() || llvm::sys::path::is_separator(value: Path.front(), style: Style);
51}
52} // namespace clangd
53} // namespace clang
54

source code of clang-tools-extra/clangd/support/Path.cpp