//===--- Preprocess.cpp - C Language Family Preprocessor Implementation ---===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Preprocessor interface.
//
//===----------------------------------------------------------------------===//
//
// Options to support:
// -H - Print the name of each header file used.
// -d[MDNI] - Dump various things.
// -fworking-directory - #line's with preprocessor's working dir.
// -fpreprocessed
// -dependency-file,-M,-MM,-MF,-MG,-MP,-MT,-MQ,-MD,-MMD
// -W*
// -w
//
// Messages to emit:
// "Multiple include guards may be useful for:\n"
//
//===----------------------------------------------------------------------===//
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/MacroInfo.h"
#include "clang/Lex/PPCallbacks.h"
#include "clang/Lex/Pragma.h"
#include "clang/Lex/ScratchBuffer.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Streams.h"
#include <ctime>
using namespace clang;
//===----------------------------------------------------------------------===//
Preprocessor::Preprocessor(Diagnostic &diags, const LangOptions &opts,
TargetInfo &target, SourceManager &SM,
HeaderSearch &Headers)
: Diags(diags), Features(opts), Target(target), FileMgr(Headers.getFileMgr()),
SourceMgr(SM), HeaderInfo(Headers), Identifiers(opts),
CurLexer(0), CurDirLookup(0), CurMacroExpander(0), Callbacks(0) {
ScratchBuf = new ScratchBuffer(SourceMgr);
// Clear stats.
NumDirectives = NumDefined = NumUndefined = NumPragma = 0;
NumIf = NumElse = NumEndif = 0;
NumEnteredSourceFiles = 0;
NumMacroExpanded = NumFnMacroExpanded = NumBuiltinMacroExpanded =