1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
//===--- Headers.cpp - Include headers ---------------------------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Headers.h"
#include "Compiler.h"
#include "Logger.h"
#include "SourceCode.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Lex/HeaderSearch.h"
#include "llvm/Support/Path.h"
namespace clang {
namespace clangd {
namespace {
class RecordHeaders : public PPCallbacks {
public:
RecordHeaders(const SourceManager &SM, IncludeStructure *Out)
: SM(SM), Out(Out) {}
// Record existing #includes - both written and resolved paths. Only #includes
// in the main file are collected.
void InclusionDirective(SourceLocation HashLoc, const Token & /*IncludeTok*/,
llvm::StringRef FileName, bool IsAngled,
CharSourceRange FilenameRange, const FileEntry *File,
llvm::StringRef /*SearchPath*/,
llvm::StringRef /*RelativePath*/,
const Module * /*Imported*/,
SrcMgr::CharacteristicKind /*FileType*/) override {
if (SM.isInMainFile(HashLoc))
Out->MainFileIncludes.push_back({
halfOpenToRange(SM, FilenameRange),
(IsAngled ? "<" + FileName + ">" : "\"" + FileName + "\"").str(),
File ? File->tryGetRealPathName() : "",
});
if (File) {
auto *IncludingFileEntry = SM.getFileEntryForID(SM.getFileID(HashLoc));
if (!IncludingFileEntry) {
assert(SM.getBufferName(HashLoc).startswith("<") &&
"Expected #include location to be a file or <built-in>");
// Treat as if included from the main file.
IncludingFileEntry = SM.getFileEntryForID(SM.getMainFileID());
}
Out->recordInclude(IncludingFileEntry->getName(), File->getName(),
File->tryGetRealPathName());
}
}
private:
const SourceManager &SM;
IncludeStructure *Out;
};
} // namespace
bool isLiteralInclude(llvm::StringRef Include) {
return Include.startswith("<") || Include.startswith("\"");
}
bool HeaderFile::valid() const {
return (Verbatim && isLiteralInclude(File)) ||
(!Verbatim && llvm::sys::path::is_absolute(File));
}
std::unique_ptr<PPCallbacks>
collectIncludeStructureCallback(const SourceManager &SM,
IncludeStructure *Out) {
return llvm::make_unique<RecordHeaders>(SM, Out);
}
void IncludeStructure::recordInclude(llvm::StringRef IncludingName,
llvm::StringRef IncludedName,
llvm::StringRef IncludedRealName) {
auto Child = fileIndex(IncludedName);
if (!IncludedRealName.empty() && RealPathNames[Child].empty())
RealPathNames[Child] = IncludedRealName;
auto Parent = fileIndex(IncludingName);
IncludeChildren[Parent].push_back(Child);
}
unsigned IncludeStructure::fileIndex(llvm::StringRef Name) {
auto R = NameToIndex.try_emplace(Name, RealPathNames.size());
if (R.second)
RealPathNames.emplace_back();
return R.first->getValue();
}
llvm::StringMap<unsigned>
IncludeStructure::includeDepth(llvm::StringRef Root) const {
// Include depth 0 is the main file only.
llvm::StringMap<unsigned> Result;
Result[Root] = 0;
std::vector<unsigned> CurrentLevel;
llvm::DenseSet<unsigned> Seen;
auto It = NameToIndex.find(Root);
if (It != NameToIndex.end()) {
CurrentLevel.push_back(It->second);
Seen.insert(It->second);
}
// Each round of BFS traversal finds the next depth level.
std::vector<unsigned> PreviousLevel;
for (unsigned Level = 1; !CurrentLevel.empty(); ++Level) {
PreviousLevel.clear();
PreviousLevel.swap(CurrentLevel);
for (const auto &Parent : PreviousLevel) {
for (const auto &Child : IncludeChildren.lookup(Parent)) {
if (Seen.insert(Child).second) {
CurrentLevel.push_back(Child);
const auto &Name = RealPathNames[Child];
// Can't include files if we don't have their real path.
if (!Name.empty())
Result[Name] = Level;
}
}
}
}
return Result;
}
/// FIXME(ioeric): we might not want to insert an absolute include path if the
/// path is not shortened.
bool IncludeInserter::shouldInsertInclude(
const HeaderFile &DeclaringHeader, const HeaderFile &InsertedHeader) const {
assert(DeclaringHeader.valid() && InsertedHeader.valid());
if (FileName == DeclaringHeader.File || FileName == InsertedHeader.File)
return false;
llvm::StringSet<> IncludedHeaders;
for (const auto &Inc : Inclusions) {
IncludedHeaders.insert(Inc.Written);
if (!Inc.Resolved.empty())
IncludedHeaders.insert(Inc.Resolved);
}
auto Included = [&](llvm::StringRef Header) {
return IncludedHeaders.find(Header) != IncludedHeaders.end();
};
return !Included(DeclaringHeader.File) && !Included(InsertedHeader.File);
}
std::string
IncludeInserter::calculateIncludePath(const HeaderFile &DeclaringHeader,
const HeaderFile &InsertedHeader) const {
assert(DeclaringHeader.valid() && InsertedHeader.valid());
if (InsertedHeader.Verbatim)
return InsertedHeader.File;
bool IsSystem = false;
std::string Suggested = HeaderSearchInfo.suggestPathToFileForDiagnostics(
InsertedHeader.File, BuildDir, &IsSystem);
if (IsSystem)
Suggested = "<" + Suggested + ">";
else
Suggested = "\"" + Suggested + "\"";
return Suggested;
}
Optional<TextEdit> IncludeInserter::insert(StringRef VerbatimHeader) const {
Optional<TextEdit> Edit = None;
if (auto Insertion = Inserter.insert(VerbatimHeader.trim("\"<>"),
VerbatimHeader.startswith("<")))
Edit = replacementToEdit(Code, *Insertion);
return Edit;
}
} // namespace clangd
} // namespace clang
|
