1 //===--- DirectoryLookup.h - Info for searching for headers -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the DirectoryLookup interface.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LEX_DIRECTORYLOOKUP_H
15 #define LLVM_CLANG_LEX_DIRECTORYLOOKUP_H
17 #include "clang/Basic/SourceManager.h"
28 /// DirectoryLookup - This class represents one entry in the search list that
29 /// specifies the search order for directories in #include directives. It
30 /// represents either a directory, a framework, or a headermap.
32 class DirectoryLookup {
40 union { // This union is discriminated by isHeaderMap.
41 /// Dir - This is the actual directory that we're referring to for a normal
42 /// directory or a framework.
43 const DirectoryEntry *Dir;
45 /// Map - This is the HeaderMap if this is a headermap lookup.
50 /// DirCharacteristic - The type of directory this is: this is an instance of
51 /// SrcMgr::CharacteristicKind.
52 unsigned DirCharacteristic : 2;
54 /// UserSupplied - True if this is a user-supplied directory.
56 bool UserSupplied : 1;
58 /// LookupType - This indicates whether this DirectoryLookup object is a
59 /// normal directory, a framework, or a headermap.
60 unsigned LookupType : 2;
62 /// DirectoryLookup ctor - Note that this ctor *does not take ownership* of
64 DirectoryLookup(const DirectoryEntry *dir, SrcMgr::CharacteristicKind DT,
65 bool isUser, bool isFramework)
66 : DirCharacteristic(DT), UserSupplied(isUser),
67 LookupType(isFramework ? LT_Framework : LT_NormalDir) {
71 /// DirectoryLookup ctor - Note that this ctor *does not take ownership* of
73 DirectoryLookup(const HeaderMap *map, SrcMgr::CharacteristicKind DT,
75 : DirCharacteristic(DT), UserSupplied(isUser), LookupType(LT_HeaderMap) {
79 /// getLookupType - Return the kind of directory lookup that this is: either a
80 /// normal directory, a framework path, or a HeaderMap.
81 LookupType_t getLookupType() const { return (LookupType_t)LookupType; }
83 /// getName - Return the directory or filename corresponding to this lookup
85 const char *getName() const;
87 /// getDir - Return the directory that this entry refers to.
89 const DirectoryEntry *getDir() const { return isNormalDir() ? u.Dir : 0; }
91 /// getFrameworkDir - Return the directory that this framework refers to.
93 const DirectoryEntry *getFrameworkDir() const {
94 return isFramework() ? u.Dir : 0;
97 /// getHeaderMap - Return the directory that this entry refers to.
99 const HeaderMap *getHeaderMap() const { return isHeaderMap() ? u.Map : 0; }
101 /// isNormalDir - Return true if this is a normal directory, not a header map.
102 bool isNormalDir() const { return getLookupType() == LT_NormalDir; }
104 /// isFramework - True if this is a framework directory.
106 bool isFramework() const { return getLookupType() == LT_Framework; }
108 /// isHeaderMap - Return true if this is a header map, not a normal directory.
109 bool isHeaderMap() const { return getLookupType() == LT_HeaderMap; }
111 /// DirCharacteristic - The type of directory this is, one of the DirType enum
113 SrcMgr::CharacteristicKind getDirCharacteristic() const {
114 return (SrcMgr::CharacteristicKind)DirCharacteristic;
117 /// isUserSupplied - True if this is a user-supplied directory.
119 bool isUserSupplied() const { return UserSupplied; }
122 /// LookupFile - Lookup the specified file in this search path, returning it
123 /// if it exists or returning null if not.
124 const FileEntry *LookupFile(llvm::StringRef Filename, HeaderSearch &HS) const;
127 const FileEntry *DoFrameworkLookup(llvm::StringRef Filename,
128 HeaderSearch &HS) const;
132 } // end namespace clang