One instance of this struct is kept for every file loaded or used. More...

#include "clang/Basic/SourceManager.h"

Public Member Functions
	ContentCache ()

	ContentCache (FileEntryRef Ent)

	ContentCache (FileEntryRef Ent, FileEntryRef contentEnt)

	ContentCache (const ContentCache &RHS)
	The copy ctor does not allow copies where source object has either a non-NULL Buffer or SourceLineCache.

ContentCache &	operator= (const ContentCache &RHS)=delete

std::optional< llvm::MemoryBufferRef >	getBufferOrNone (DiagnosticsEngine &Diag, FileManager &FM, SourceLocation Loc=SourceLocation()) const
	Returns the memory buffer for the associated content.

unsigned	getSize () const
	Returns the size of the content encapsulated by this ContentCache.

unsigned	getSizeBytesMapped () const
	Returns the number of bytes actually mapped for this ContentCache.

llvm::MemoryBuffer::BufferKind	getMemoryBufferKind () const
	Returns the kind of memory used to back the memory buffer for this content cache.

std::optional< llvm::MemoryBufferRef >	getBufferIfLoaded () const
	Return the buffer, only if it has been loaded.

std::optional< StringRef >	getBufferDataIfLoaded () const
	Return a StringRef to the source buffer data, only if it has already been loaded.

void	setBuffer (std::unique_ptr< llvm::MemoryBuffer > B)
	Set the buffer.

void	setUnownedBuffer (std::optional< llvm::MemoryBufferRef > B)
	Set the buffer to one that's not owned (or to nullptr).

Static Public Member Functions
static const char *	getInvalidBOM (StringRef BufStr)

Public Attributes
OptionalFileEntryRef	OrigEntry
	Reference to the file entry representing this ContentCache.

OptionalFileEntryRef	ContentsEntry
	References the file which the contents were actually loaded from.

StringRef	Filename
	The filename that is used to access OrigEntry.

LineOffsetMapping	SourceLineCache
	A bump pointer allocated array of offsets for each source line.

unsigned	BufferOverridden: 1
	Indicates whether the buffer itself was provided to override the actual file contents.

unsigned	IsFileVolatile: 1
	True if this content cache was initially created for a source file considered to be volatile (likely to change between stat and open).

unsigned	IsTransient: 1
	True if this file may be transient, that is, if it might not exist at some later point in time when this content entry is used, after serialization and deserialization.

unsigned	IsBufferInvalid: 1

Detailed Description

One instance of this struct is kept for every file loaded or used.

This object owns the MemoryBuffer object.

Definition at line 131 of file SourceManager.h.

Constructor & Destructor Documentation

◆ ContentCache() [1/4]

clang::SrcMgr::ContentCache::ContentCache ( )

inline

Definition at line 187 of file SourceManager.h.

◆ ContentCache() [2/4]

clang::SrcMgr::ContentCache::ContentCache ( FileEntryRef Ent )

inline

Definition at line 192 of file SourceManager.h.

◆ ContentCache() [3/4]

clang::SrcMgr::ContentCache::ContentCache	(	FileEntryRef	Ent,
		FileEntryRef	contentEnt
	)

inline

Definition at line 194 of file SourceManager.h.

◆ ContentCache() [4/4]

clang::SrcMgr::ContentCache::ContentCache ( const ContentCache & RHS )

inline

The copy ctor does not allow copies where source object has either a non-NULL Buffer or SourceLineCache.

Ownership of allocated memory is not transferred, so this is a logical error.

Definition at line 201 of file SourceManager.h.

References ContentsEntry, OrigEntry, and SourceLineCache.

Member Function Documentation

◆ getBufferDataIfLoaded()

std::optional< StringRef > clang::SrcMgr::ContentCache::getBufferDataIfLoaded ( ) const

inline

Return a StringRef to the source buffer data, only if it has already been loaded.

Definition at line 251 of file SourceManager.h.

Referenced by clang::SourceManager::getBufferDataIfLoaded().

◆ getBufferIfLoaded()

std::optional< llvm::MemoryBufferRef > clang::SrcMgr::ContentCache::getBufferIfLoaded ( ) const

inline

Return the buffer, only if it has been loaded.

Definition at line 243 of file SourceManager.h.

Referenced by clang::ASTReader::ReadSLocEntry().

◆ getBufferOrNone()

std::optional< llvm::MemoryBufferRef > ContentCache::getBufferOrNone	(	DiagnosticsEngine &	Diag,
		FileManager &	FM,
		SourceLocation	Loc = `SourceLocation()`
	)		const

Returns the memory buffer for the associated content.

Parameters

Diag	Object through which diagnostics will be emitted if the buffer cannot be retrieved.
Loc	If specified, is the location that invalid file diagnostics will be emitted at.

Definition at line 102 of file SourceManager.cpp.

References ContentsEntry, Diag(), clang::FileManager::getBufferForFile(), getInvalidBOM(), clang::FileEntryRef::getName(), clang::FileEntryRef::getSize(), IsBufferInvalid, IsFileVolatile, and clang::FileEntryRef::isNamedPipe().

Referenced by clang::SourceManager::createFileID(), clang::SourceManager::getBufferDataOrNone(), clang::SourceManager::getCharacterData(), clang::SourceManager::getLineNumber(), clang::SourceManager::getMemoryBufferForFileOrNone(), and clang::SourceManager::translateLineCol().

◆ getInvalidBOM()

const char * ContentCache::getInvalidBOM ( StringRef BufStr )

static

Definition at line 78 of file SourceManager.cpp.

Referenced by getBufferOrNone().

◆ getMemoryBufferKind()

llvm::MemoryBuffer::BufferKind ContentCache::getMemoryBufferKind ( ) const

Returns the kind of memory used to back the memory buffer for this content cache.

This is used for performance analysis.

Definition at line 61 of file SourceManager.cpp.

◆ getSize()

unsigned ContentCache::getSize ( ) const

Returns the size of the content encapsulated by this ContentCache.

getSize - Returns the size of the content encapsulated by this ContentCache.

This can be the size of the source file or the size of an arbitrary scratch buffer. If the ContentCache encapsulates a source file this size is retrieved from the file's FileEntry.

This can be the size of the source file or the size of an arbitrary scratch buffer. If the ContentCache encapsulates a source file, that file is not lazily brought in from disk to satisfy this query.

Definition at line 73 of file SourceManager.cpp.

References ContentsEntry, and clang::FileEntryRef::getSize().

◆ getSizeBytesMapped()

unsigned ContentCache::getSizeBytesMapped ( ) const

Returns the number of bytes actually mapped for this ContentCache.

getSizeBytesMapped - Returns the number of bytes actually mapped for this ContentCache.

This can be 0 if the MemBuffer was not actually expanded.

Definition at line 55 of file SourceManager.cpp.

◆ operator=()

ContentCache & clang::SrcMgr::ContentCache::operator= ( const ContentCache & RHS )

delete

◆ setBuffer()

void clang::SrcMgr::ContentCache::setBuffer ( std::unique_ptr< llvm::MemoryBuffer > B )

inline

Set the buffer.

Definition at line 258 of file SourceManager.h.

References IsBufferInvalid.

Referenced by clang::SourceManager::overrideFileContents(), and setUnownedBuffer().

◆ setUnownedBuffer()

void clang::SrcMgr::ContentCache::setUnownedBuffer ( std::optional< llvm::MemoryBufferRef > B )

inline

Set the buffer to one that's not owned (or to nullptr).

Precondition: Buffer cannot already be set.

Definition at line 266 of file SourceManager.h.

References setBuffer().

Member Data Documentation

◆ BufferOverridden

unsigned clang::SrcMgr::ContentCache::BufferOverridden

Indicates whether the buffer itself was provided to override the actual file contents.

When true, the original entry may be a virtual file that does not exist.

Definition at line 171 of file SourceManager.h.

Referenced by clang::SourceManager::overrideFileContents(), and clang::ASTReader::ReadSLocEntry().

◆ ContentsEntry

OptionalFileEntryRef clang::SrcMgr::ContentCache::ContentsEntry

References the file which the contents were actually loaded from.

Can be different from 'Entry' if we overridden the contents of one file with the contents of another file.

Definition at line 152 of file SourceManager.h.

Referenced by ContentCache(), clang::SourceManager::createFileID(), getBufferOrNone(), getSize(), and clang::ASTReader::ReadSLocEntry().

◆ Filename

StringRef clang::SrcMgr::ContentCache::Filename

The filename that is used to access OrigEntry.

FIXME: Remove this once OrigEntry is a FileEntryRef with a stable name.

Definition at line 157 of file SourceManager.h.

Referenced by clang::SrcMgr::FileInfo::get(), and clang::SrcMgr::FileInfo::getName().

◆ IsBufferInvalid

unsigned clang::SrcMgr::ContentCache::IsBufferInvalid

mutable

Definition at line 185 of file SourceManager.h.

Referenced by getBufferOrNone(), and setBuffer().

◆ IsFileVolatile

unsigned clang::SrcMgr::ContentCache::IsFileVolatile

True if this content cache was initially created for a source file considered to be volatile (likely to change between stat and open).

Definition at line 176 of file SourceManager.h.

Referenced by getBufferOrNone().

◆ IsTransient

unsigned clang::SrcMgr::ContentCache::IsTransient

True if this file may be transient, that is, if it might not exist at some later point in time when this content entry is used, after serialization and deserialization.

Definition at line 182 of file SourceManager.h.

Referenced by clang::SourceManager::setFileIsTransient().

◆ OrigEntry

OptionalFileEntryRef clang::SrcMgr::ContentCache::OrigEntry

Reference to the file entry representing this ContentCache.

This reference does not own the FileEntry object.

It is possible for this to be NULL if the ContentCache encapsulates an imaginary text buffer.

FIXME: Make non-optional using a virtual file as needed, remove Filename and use OrigEntry.getNameAsRequested() instead.

Definition at line 146 of file SourceManager.h.

Referenced by ContentCache(), clang::SourceManager::getFileEntryForSLocEntry(), clang::SourceManager::getNonBuiltinFilenameForID(), clang::SourceManager::initializeForReplay(), clang::ASTReader::ReadSLocEntry(), and clang::SourceManager::translateFile().

◆ SourceLineCache

LineOffsetMapping clang::SrcMgr::ContentCache::SourceLineCache

mutable

A bump pointer allocated array of offsets for each source line.

This is lazily computed. The lines are owned by the SourceManager BumpPointerAllocator object.

Definition at line 163 of file SourceManager.h.

Referenced by ContentCache(), clang::SourceManager::getColumnNumber(), clang::SourceManager::getLineNumber(), clang::ScratchBuffer::getToken(), clang::Rewriter::IncreaseIndentation(), clang::Rewriter::InsertText(), and clang::SourceManager::translateLineCol().

The documentation for this class was generated from the following files:

include/clang/Basic/SourceManager.h
lib/Basic/SourceManager.cpp

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ContentCache() [1/4]

◆ ContentCache() [2/4]

◆ ContentCache() [3/4]

◆ ContentCache() [4/4]

Member Function Documentation

◆ getBufferDataIfLoaded()

◆ getBufferIfLoaded()

◆ getBufferOrNone()

◆ getInvalidBOM()

◆ getMemoryBufferKind()

◆ getSize()

◆ getSizeBytesMapped()

◆ operator=()

◆ setBuffer()

◆ setUnownedBuffer()

Member Data Documentation

◆ BufferOverridden

◆ ContentsEntry

◆ Filename

◆ IsBufferInvalid

◆ IsFileVolatile

◆ IsTransient

◆ OrigEntry

◆ SourceLineCache