1#include "clang/Basic/Attributes.h"
2#include "clang/Basic/AttrSubjectMatchRules.h"
3#include "clang/Basic/AttributeCommonInfo.h"
4#include "clang/Basic/IdentifierTable.h"
5#include "llvm/ADT/StringSwitch.h"
6using namespace clang;
7
8int clang::hasAttribute(AttrSyntax Syntax, const IdentifierInfo *Scope,
9                        const IdentifierInfo *Attr, const TargetInfo &Target,
10                        const LangOptions &LangOpts) {
11  StringRef Name = Attr->getName();
12  // Normalize the attribute name, __foo__ becomes foo.
13  if (Name.size() >= 4 && Name.startswith("__") && Name.endswith("__"))
14    Name = Name.substr(2, Name.size() - 4);
15
16  // Normalize the scope name, but only for gnu and clang attributes.
17  StringRef ScopeName = Scope ? Scope->getName() : "";
18  if (ScopeName == "__gnu__")
19    ScopeName = "gnu";
20  else if (ScopeName == "_Clang")
21    ScopeName = "clang";
22
23#include "clang/Basic/AttrHasAttributeImpl.inc"
24
25  return 0;
26}
27
28const char *attr::getSubjectMatchRuleSpelling(attr::SubjectMatchRule Rule) {
29  switch (Rule) {
30#define ATTR_MATCH_RULE(NAME, SPELLING, IsAbstract)                            \
31  case attr::NAME:                                                             \
32    return SPELLING;
33#include "clang/Basic/AttrSubMatchRulesList.inc"
34  }
35  llvm_unreachable("Invalid subject match rule");
36}
37
38static StringRef
39normalizeAttrScopeName(const IdentifierInfo *Scope,
40                       AttributeCommonInfo::Syntax SyntaxUsed) {
41  if (!Scope)
42    return "";
43
44  // Normalize the "__gnu__" scope name to be "gnu" and the "_Clang" scope name
45  // to be "clang".
46  StringRef ScopeName = Scope->getName();
47  if (SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
48      SyntaxUsed == AttributeCommonInfo::AS_C2x) {
49    if (ScopeName == "__gnu__")
50      ScopeName = "gnu";
51    else if (ScopeName == "_Clang")
52      ScopeName = "clang";
53  }
54  return ScopeName;
55}
56
57static StringRef normalizeAttrName(const IdentifierInfo *Name,
58                                   StringRef NormalizedScopeName,
59                                   AttributeCommonInfo::Syntax SyntaxUsed) {
60  // Normalize the attribute name, __foo__ becomes foo. This is only allowable
61  // for GNU attributes, and attributes using the double square bracket syntax.
62  bool ShouldNormalize =
63      SyntaxUsed == AttributeCommonInfo::AS_GNU ||
64      ((SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
65        SyntaxUsed == AttributeCommonInfo::AS_C2x) &&
66       (NormalizedScopeName.empty() || NormalizedScopeName == "gnu" ||
67        NormalizedScopeName == "clang"));
68  StringRef AttrName = Name->getName();
69  if (ShouldNormalize && AttrName.size() >= 4 && AttrName.startswith("__") &&
70      AttrName.endswith("__"))
71    AttrName = AttrName.slice(2, AttrName.size() - 2);
72
73  return AttrName;
74}
75
76bool AttributeCommonInfo::isGNUScope() const {
77  return ScopeName && (ScopeName->isStr("gnu") || ScopeName->isStr("__gnu__"));
78}
79
80#include "clang/Sema/AttrParsedAttrKinds.inc"
81
82static SmallString<64> normalizeName(const IdentifierInfo *Name,
83                                     const IdentifierInfo *Scope,
84                                     AttributeCommonInfo::Syntax SyntaxUsed) {
85  StringRef ScopeName = normalizeAttrScopeName(Scope, SyntaxUsed);
86  StringRef AttrName = normalizeAttrName(Name, ScopeName, SyntaxUsed);
87
88  SmallString<64> FullName = ScopeName;
89  if (!ScopeName.empty()) {
90    assert(SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
91           SyntaxUsed == AttributeCommonInfo::AS_C2x);
92    FullName += "::";
93  }
94  FullName += AttrName;
95
96  return FullName;
97}
98
99AttributeCommonInfo::Kind
100AttributeCommonInfo::getParsedKind(const IdentifierInfo *Name,
101                                   const IdentifierInfo *ScopeName,
102                                   Syntax SyntaxUsed) {
103  return ::getAttrKind(normalizeName(Name, ScopeName, SyntaxUsed), SyntaxUsed);
104}
105
106std::string AttributeCommonInfo::getNormalizedFullName() const {
107  return static_cast<std::string>(
108      normalizeName(getAttrName(), getScopeName(), getSyntax()));
109}
110
111unsigned AttributeCommonInfo::calculateAttributeSpellingListIndex() const {
112  // Both variables will be used in tablegen generated
113  // attribute spell list index matching code.
114  auto Syntax = static_cast<AttributeCommonInfo::Syntax>(getSyntax());
115  StringRef Scope = normalizeAttrScopeName(getScopeName(), Syntax);
116  StringRef Name = normalizeAttrName(getAttrName(), Scope, Syntax);
117
118#include "clang/Sema/AttrSpellingListIndex.inc"
119}
120