#include "clang/Lex/HeaderSearch.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/Module.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Lex/DirectoryLookup.h"
#include "clang/Lex/ExternalPreprocessorSource.h"
#include "clang/Lex/HeaderMap.h"
#include "clang/Lex/HeaderSearchOptions.h"
#include "clang/Lex/LexDiagnostic.h"
#include "clang/Lex/ModuleMap.h"
#include "clang/Lex/Preprocessor.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Capacity.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/xxhash.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdio>
#include <cstring>
#include <string>
#include <system_error>
#include <utility>

Macros
#define	DEBUG_TYPE "file-search"

Functions
	ALWAYS_ENABLED_STATISTIC (NumIncluded, "Number of attempted #includes.")

	ALWAYS_ENABLED_STATISTIC (NumMultiIncludeFileOptzn, "Number of #includes skipped due to the multi-include optimization.")

	ALWAYS_ENABLED_STATISTIC (NumFrameworkLookups, "Number of framework lookups.")

	ALWAYS_ENABLED_STATISTIC (NumSubFrameworkLookups, "Number of subframework lookups.")

static OptionalDirectoryEntryRef	getTopFrameworkDir (FileManager &FileMgr, StringRef DirName, SmallVectorImpl< std::string > &SubmodulePath)
	Given a framework directory, find the top-most framework directory.

static bool	needModuleLookup (Module *RequestingModule, bool HasSuggestedModule)

static bool	checkMSVCHeaderSearch (DiagnosticsEngine &Diags, OptionalFileEntryRef MSFE, const FileEntry *FE, SourceLocation IncludeLoc)
	Return true with a diagnostic if the file that MSVC would have found fails to match the one that Clang would have found with MSVC header search disabled.

static const char *	copyString (StringRef Str, llvm::BumpPtrAllocator &Alloc)

static bool	isFrameworkStylePath (StringRef Path, bool &IsPrivateHeader, SmallVectorImpl< char > &FrameworkName, SmallVectorImpl< char > &IncludeSpelling)

static void	diagnoseFrameworkInclude (DiagnosticsEngine &Diags, SourceLocation IncludeLoc, StringRef Includer, StringRef IncludeFilename, FileEntryRef IncludeFE, bool isAngled=false, bool FoundByHeaderMap=false)

static bool	moduleMembershipNeedsMerge (const HeaderFileInfo *HFI, ModuleMap::ModuleHeaderRole Role)

static void	mergeHeaderFileInfoModuleBits (HeaderFileInfo &HFI, bool isModuleHeader, bool isTextualModuleHeader)

static void	mergeHeaderFileInfo (HeaderFileInfo &HFI, const HeaderFileInfo &OtherHFI)
	Merge the header file info provided by `OtherHFI` into the current header file info (`HFI`)

static bool	suggestModule (HeaderSearch &HS, FileEntryRef File, Module RequestingModule, ModuleMap::KnownHeader SuggestedModule)

static OptionalFileEntryRef	getPrivateModuleMap (FileEntryRef File, FileManager &FileMgr, DiagnosticsEngine &Diags)

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "file-search"

Definition at line 52 of file HeaderSearch.cpp.

Function Documentation

◆ ALWAYS_ENABLED_STATISTIC() [1/4]

ALWAYS_ENABLED_STATISTIC	(	NumFrameworkLookups	,
		"Number of framework lookups."
	)

◆ ALWAYS_ENABLED_STATISTIC() [2/4]

ALWAYS_ENABLED_STATISTIC	(	NumIncluded	,
		"Number of attempted #includes."
	)

◆ ALWAYS_ENABLED_STATISTIC() [3/4]

ALWAYS_ENABLED_STATISTIC	(	NumMultiIncludeFileOptzn	,
		"Number of #includes skipped due to the multi-include optimization."
	)

◆ ALWAYS_ENABLED_STATISTIC() [4/4]

ALWAYS_ENABLED_STATISTIC	(	NumSubFrameworkLookups	,
		"Number of subframework lookups."
	)

◆ checkMSVCHeaderSearch()

static bool checkMSVCHeaderSearch	(	DiagnosticsEngine &	Diags,
		OptionalFileEntryRef	MSFE,
		const FileEntry *	FE,
		SourceLocation	IncludeLoc
	)

static

Return true with a diagnostic if the file that MSVC would have found fails to match the one that Clang would have found with MSVC header search disabled.

Definition at line 782 of file HeaderSearch.cpp.

References clang::FileEntryRef::getName(), and clang::DiagnosticsEngine::Report().

Referenced by clang::HeaderSearch::LookupFile().

◆ copyString()

static const char * copyString	(	StringRef	Str,
		llvm::BumpPtrAllocator &	Alloc
	)

static

Definition at line 793 of file HeaderSearch.cpp.

Referenced by clang::HeaderSearch::LookupFile().

◆ diagnoseFrameworkInclude()

static void diagnoseFrameworkInclude	(	DiagnosticsEngine &	Diags,
		SourceLocation	IncludeLoc,
		StringRef	Includer,
		StringRef	IncludeFilename,
		FileEntryRef	IncludeFE,
		bool	isAngled = `false`,
		bool	FoundByHeaderMap = `false`
	)

static

Definition at line 843 of file HeaderSearch.cpp.

References clang::FixItHint::CreateReplacement(), clang::FileEntryRef::getName(), isFrameworkStylePath(), and clang::DiagnosticsEngine::Report().

Referenced by clang::HeaderSearch::LookupFile().

◆ getPrivateModuleMap()

static OptionalFileEntryRef getPrivateModuleMap	(	FileEntryRef	File,
		FileManager &	FileMgr,
		DiagnosticsEngine &	Diags
	)

static

Definition at line 1764 of file HeaderSearch.cpp.

References clang::File, Filename, clang::FileManager::getOptionalFileRef(), and clang::DiagnosticsEngine::Report().

◆ getTopFrameworkDir()

static OptionalDirectoryEntryRef getTopFrameworkDir	(	FileManager &	FileMgr,
		StringRef	DirName,
		SmallVectorImpl< std::string > &	SubmodulePath
	)

static

Given a framework directory, find the top-most framework directory.

Parameters

FileMgr	The file manager to use for directory lookups.
DirName	The name of the framework directory.
SubmodulePath	Will be populated with the submodule path from the returned top-level module to the originally named framework.

Definition at line 564 of file HeaderSearch.cpp.

References clang::FileManager::getCanonicalName(), and clang::FileManager::getOptionalDirectoryRef().

◆ isFrameworkStylePath()

static bool isFrameworkStylePath	(	StringRef	Path,
		bool &	IsPrivateHeader,
		SmallVectorImpl< char > &	FrameworkName,
		SmallVectorImpl< char > &	IncludeSpelling
	)