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//===--- DirectoryLookup.h - Info for searching for headers -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the DirectoryLookup interface.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LEX_DIRECTORYLOOKUP_H
#define LLVM_CLANG_LEX_DIRECTORYLOOKUP_H
#include "clang/Basic/SourceManager.h"
namespace clang {
class HeaderMap;
class DirectoryEntry;
class FileEntry;
class HeaderSearch;
/// DirectoryLookup - This class represents one entry in the search list that
/// specifies the search order for directories in #include directives. It
/// represents either a directory, a framework, or a headermap.
///
class DirectoryLookup {
public:
enum LookupType_t {
LT_NormalDir,
LT_Framework,
LT_HeaderMap
};
private:
union { // This union is discriminated by isHeaderMap.
/// Dir - This is the actual directory that we're referring to for a normal
/// directory or a framework.
const DirectoryEntry *Dir;
/// Map - This is the HeaderMap if this is a headermap lookup.
///
const HeaderMap *Map;
} u;
/// DirCharacteristic - The type of directory this is: this is an instance of
/// SrcMgr::CharacteristicKind.
unsigned DirCharacteristic : 2;
/// UserSupplied - True if this is a user-supplied directory.
///
bool UserSupplied : 1;
/// LookupType - This indicates whether this DirectoryLookup object is a
/// normal directory, a framework, or a headermap.
unsigned LookupType : 2;
public:
/// DirectoryLookup ctor - Note that this ctor *does not take ownership* of
/// 'dir'.
DirectoryLookup(const DirectoryEntry *dir, SrcMgr::CharacteristicKind DT,
bool isUser, bool isFramework)
: DirCharacteristic(DT), UserSupplied(isUser),
LookupType(isFramework ? LT_Framework : LT_NormalDir) {
u.Dir = dir;
}
/// DirectoryLookup ctor - Note that this ctor *does not take ownership* of
/// 'map'.
DirectoryLookup(const HeaderMap *map, SrcMgr::CharacteristicKind DT,
bool isUser)
: DirCharacteristic(DT), UserSupplied(isUser), LookupType(LT_HeaderMap) {
u.Map = map;
}
/// getLookupType - Return the kind of directory lookup that this is: either a
/// normal directory, a framework path, or a HeaderMap.
LookupType_t getLookupType() const { return (LookupType_t)LookupType; }
/// getName - Return the directory or filename corresponding to this lookup
/// object.
const char *getName() const;
/// getDir - Return the directory that this entry refers to.
///
const DirectoryEntry *getDir() const { return isNormalDir() ? u.Dir : 0; }
/// getFrameworkDir - Return the directory that this framework refers to.
///
const DirectoryEntry *getFrameworkDir() const {
return isFramework() ? u.Dir : 0;
}
/// getHeaderMap - Return the directory that this entry refers to.
///
const HeaderMap *getHeaderMap() const { return isHeaderMap() ? u.Map : 0; }
/// isNormalDir - Return true if this is a normal directory, not a header map.
bool isNormalDir() const { return getLookupType() == LT_NormalDir; }
/// isFramework - True if this is a framework directory.
///
bool isFramework() const { return getLookupType() == LT_Framework; }
/// isHeaderMap - Return true if this is a header map, not a normal directory.
bool isHeaderMap() const { return getLookupType() == LT_HeaderMap; }
/// DirCharacteristic - The type of directory this is, one of the DirType enum
/// values.
SrcMgr::CharacteristicKind getDirCharacteristic() const {
return (SrcMgr::CharacteristicKind)DirCharacteristic;
}
/// isUserSupplied - True if this is a user-supplied directory.
///
bool isUserSupplied() const { return UserSupplied; }
/// LookupFile - Lookup the specified file in this search path, returning it
/// if it exists or returning null if not.
const FileEntry *LookupFile(const char *FilenameStart,
const char *FilenameEnd, HeaderSearch &HS) const;
private:
const FileEntry *DoFrameworkLookup(const char *FilenameStart,
const char *FilenameEnd,
HeaderSearch &HS) const;
};
} // end namespace clang
#endif
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