PrintPreprocessedOutput.cpp revision 204962
1168404Spjd//===--- PrintPreprocessedOutput.cpp - Implement the -E mode --------------===// 2168404Spjd// 3168404Spjd// The LLVM Compiler Infrastructure 4168404Spjd// 5168404Spjd// This file is distributed under the University of Illinois Open Source 6168404Spjd// License. See LICENSE.TXT for details. 7168404Spjd// 8168404Spjd//===----------------------------------------------------------------------===// 9168404Spjd// 10168404Spjd// This code simply runs the preprocessor on the input file and prints out the 11168404Spjd// result. This is the traditional behavior of the -E option. 12168404Spjd// 13168404Spjd//===----------------------------------------------------------------------===// 14168404Spjd 15168404Spjd#include "clang/Frontend/Utils.h" 16168404Spjd#include "clang/Basic/Diagnostic.h" 17168404Spjd#include "clang/Basic/SourceManager.h" 18168404Spjd#include "clang/Frontend/PreprocessorOutputOptions.h" 19168404Spjd#include "clang/Lex/MacroInfo.h" 20168404Spjd#include "clang/Lex/PPCallbacks.h" 21168404Spjd#include "clang/Lex/Pragma.h" 22185029Spjd#include "clang/Lex/Preprocessor.h" 23168404Spjd#include "clang/Lex/TokenConcatenation.h" 24168404Spjd#include "llvm/ADT/SmallString.h" 25168404Spjd#include "llvm/ADT/STLExtras.h" 26168404Spjd#include "llvm/Config/config.h" 27168404Spjd#include "llvm/Support/raw_ostream.h" 28168404Spjd#include <cstdio> 29168404Spjdusing namespace clang; 30168404Spjd 31168404Spjd/// PrintMacroDefinition - Print a macro definition in a form that will be 32168404Spjd/// properly accepted back as a definition. 33168404Spjdstatic void PrintMacroDefinition(const IdentifierInfo &II, const MacroInfo &MI, 34168404Spjd Preprocessor &PP, llvm::raw_ostream &OS) { 35168404Spjd OS << "#define " << II.getName(); 36168404Spjd 37168404Spjd if (MI.isFunctionLike()) { 38168404Spjd OS << '('; 39168404Spjd if (!MI.arg_empty()) { 40168404Spjd MacroInfo::arg_iterator AI = MI.arg_begin(), E = MI.arg_end(); 41168404Spjd for (; AI+1 != E; ++AI) { 42168404Spjd OS << (*AI)->getName(); 43168404Spjd OS << ','; 44168404Spjd } 45168404Spjd 46168404Spjd // Last argument. 47168404Spjd if ((*AI)->getName() == "__VA_ARGS__") 48168404Spjd OS << "..."; 49168404Spjd else 50168404Spjd OS << (*AI)->getName(); 51168404Spjd } 52168404Spjd 53168404Spjd if (MI.isGNUVarargs()) 54168404Spjd OS << "..."; // #define foo(x...) 55168404Spjd 56168404Spjd OS << ')'; 57168404Spjd } 58168404Spjd 59168404Spjd // GCC always emits a space, even if the macro body is empty. However, do not 60168404Spjd // want to emit two spaces if the first token has a leading space. 61168404Spjd if (MI.tokens_empty() || !MI.tokens_begin()->hasLeadingSpace()) 62168404Spjd OS << ' '; 63168404Spjd 64168404Spjd llvm::SmallVector<char, 128> SpellingBuffer; 65168404Spjd for (MacroInfo::tokens_iterator I = MI.tokens_begin(), E = MI.tokens_end(); 66168404Spjd I != E; ++I) { 67168404Spjd if (I->hasLeadingSpace()) 68168404Spjd OS << ' '; 69168404Spjd 70168404Spjd OS << PP.getSpelling(*I, SpellingBuffer); 71169028Spjd } 72168404Spjd} 73168404Spjd 74168404Spjd//===----------------------------------------------------------------------===// 75168404Spjd// Preprocessed token printer 76168404Spjd//===----------------------------------------------------------------------===// 77168404Spjd 78168404Spjdnamespace { 79168404Spjdclass PrintPPOutputPPCallbacks : public PPCallbacks { 80168404Spjd Preprocessor &PP; 81168404Spjd TokenConcatenation ConcatInfo; 82168404Spjdpublic: 83168404Spjd llvm::raw_ostream &OS; 84168404Spjdprivate: 85168404Spjd unsigned CurLine; 86168404Spjd bool EmittedTokensOnThisLine; 87168404Spjd bool EmittedMacroOnThisLine; 88168404Spjd SrcMgr::CharacteristicKind FileType; 89168404Spjd llvm::SmallString<512> CurFilename; 90168404Spjd bool Initialized; 91168404Spjd bool DisableLineMarkers; 92168404Spjd bool DumpDefines; 93168404Spjd bool UseLineDirective; 94168404Spjdpublic: 95168404Spjd PrintPPOutputPPCallbacks(Preprocessor &pp, llvm::raw_ostream &os, 96168404Spjd bool lineMarkers, bool defines) 97168404Spjd : PP(pp), ConcatInfo(PP), OS(os), DisableLineMarkers(lineMarkers), 98168404Spjd DumpDefines(defines) { 99168404Spjd CurLine = 0; 100168404Spjd CurFilename += "<uninit>"; 101168404Spjd EmittedTokensOnThisLine = false; 102168404Spjd EmittedMacroOnThisLine = false; 103168404Spjd FileType = SrcMgr::C_User; 104168404Spjd Initialized = false; 105168404Spjd 106168404Spjd // If we're in microsoft mode, use normal #line instead of line markers. 107168404Spjd UseLineDirective = PP.getLangOptions().Microsoft; 108168404Spjd } 109168404Spjd 110168404Spjd void SetEmittedTokensOnThisLine() { EmittedTokensOnThisLine = true; } 111168404Spjd bool hasEmittedTokensOnThisLine() const { return EmittedTokensOnThisLine; } 112168404Spjd 113168404Spjd virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason, 114168404Spjd SrcMgr::CharacteristicKind FileType); 115168404Spjd virtual void Ident(SourceLocation Loc, const std::string &str); 116168404Spjd virtual void PragmaComment(SourceLocation Loc, const IdentifierInfo *Kind, 117168404Spjd const std::string &Str); 118168404Spjd 119168404Spjd 120168404Spjd bool HandleFirstTokOnLine(Token &Tok); 121168404Spjd bool MoveToLine(SourceLocation Loc); 122168404Spjd bool AvoidConcat(const Token &PrevTok, const Token &Tok) { 123168404Spjd return ConcatInfo.AvoidConcat(PrevTok, Tok); 124168404Spjd } 125168404Spjd void WriteLineInfo(unsigned LineNo, const char *Extra=0, unsigned ExtraLen=0); 126168404Spjd 127168404Spjd void HandleNewlinesInToken(const char *TokStr, unsigned Len); 128168404Spjd 129168404Spjd /// MacroDefined - This hook is called whenever a macro definition is seen. 130168404Spjd void MacroDefined(const IdentifierInfo *II, const MacroInfo *MI); 131168404Spjd 132168404Spjd}; 133168404Spjd} // end anonymous namespace 134168404Spjd 135168404Spjdvoid PrintPPOutputPPCallbacks::WriteLineInfo(unsigned LineNo, 136168404Spjd const char *Extra, 137168404Spjd unsigned ExtraLen) { 138168404Spjd if (EmittedTokensOnThisLine || EmittedMacroOnThisLine) { 139168404Spjd OS << '\n'; 140168404Spjd EmittedTokensOnThisLine = false; 141168404Spjd EmittedMacroOnThisLine = false; 142168404Spjd } 143168404Spjd 144168404Spjd // Emit #line directives or GNU line markers depending on what mode we're in. 145168404Spjd if (UseLineDirective) { 146168404Spjd OS << "#line" << ' ' << LineNo << ' ' << '"'; 147168404Spjd OS.write(&CurFilename[0], CurFilename.size()); 148168404Spjd OS << '"'; 149168404Spjd } else { 150168404Spjd OS << '#' << ' ' << LineNo << ' ' << '"'; 151168404Spjd OS.write(&CurFilename[0], CurFilename.size()); 152168404Spjd OS << '"'; 153168404Spjd 154168404Spjd if (ExtraLen) 155168404Spjd OS.write(Extra, ExtraLen); 156168404Spjd 157168404Spjd if (FileType == SrcMgr::C_System) 158168404Spjd OS.write(" 3", 2); 159168404Spjd else if (FileType == SrcMgr::C_ExternCSystem) 160168404Spjd OS.write(" 3 4", 4); 161168404Spjd } 162168404Spjd OS << '\n'; 163168404Spjd} 164168404Spjd 165168404Spjd/// MoveToLine - Move the output to the source line specified by the location 166168404Spjd/// object. We can do this by emitting some number of \n's, or be emitting a 167168404Spjd/// #line directive. This returns false if already at the specified line, true 168168404Spjd/// if some newlines were emitted. 169168404Spjdbool PrintPPOutputPPCallbacks::MoveToLine(SourceLocation Loc) { 170168404Spjd unsigned LineNo = PP.getSourceManager().getInstantiationLineNumber(Loc); 171168404Spjd 172168404Spjd if (DisableLineMarkers) { 173168404Spjd if (LineNo == CurLine) return false; 174168404Spjd 175185029Spjd CurLine = LineNo; 176185029Spjd 177185029Spjd if (!EmittedTokensOnThisLine && !EmittedMacroOnThisLine) 178185029Spjd return true; 179185029Spjd 180168404Spjd OS << '\n'; 181168404Spjd EmittedTokensOnThisLine = false; 182168404Spjd EmittedMacroOnThisLine = false; 183168404Spjd return true; 184168404Spjd } 185168404Spjd 186168404Spjd // If this line is "close enough" to the original line, just print newlines, 187168404Spjd // otherwise print a #line directive. 188168404Spjd if (LineNo-CurLine <= 8) { 189168404Spjd if (LineNo-CurLine == 1) 190185029Spjd OS << '\n'; 191185029Spjd else if (LineNo == CurLine) 192168404Spjd return false; // Spelling line moved, but instantiation line didn't. 193168404Spjd else { 194185029Spjd const char *NewLines = "\n\n\n\n\n\n\n\n"; 195185029Spjd OS.write(NewLines, LineNo-CurLine); 196168404Spjd } 197168404Spjd } else { 198168404Spjd WriteLineInfo(LineNo, 0, 0); 199185029Spjd } 200185029Spjd 201185029Spjd CurLine = LineNo; 202185029Spjd return true; 203185029Spjd} 204168404Spjd 205168404Spjd 206168404Spjd/// FileChanged - Whenever the preprocessor enters or exits a #include file 207168404Spjd/// it invokes this handler. Update our conception of the current source 208168404Spjd/// position. 209168404Spjdvoid PrintPPOutputPPCallbacks::FileChanged(SourceLocation Loc, 210168404Spjd FileChangeReason Reason, 211168404Spjd SrcMgr::CharacteristicKind NewFileType) { 212168404Spjd // Unless we are exiting a #include, make sure to skip ahead to the line the 213168404Spjd // #include directive was at. 214168404Spjd SourceManager &SourceMgr = PP.getSourceManager(); 215168404Spjd if (Reason == PPCallbacks::EnterFile) { 216168404Spjd SourceLocation IncludeLoc = SourceMgr.getPresumedLoc(Loc).getIncludeLoc(); 217168404Spjd if (IncludeLoc.isValid()) 218168404Spjd MoveToLine(IncludeLoc); 219168404Spjd } else if (Reason == PPCallbacks::SystemHeaderPragma) { 220168404Spjd MoveToLine(Loc); 221168404Spjd 222168404Spjd // TODO GCC emits the # directive for this directive on the line AFTER the 223168404Spjd // directive and emits a bunch of spaces that aren't needed. Emulate this 224168404Spjd // strange behavior. 225168404Spjd } 226168404Spjd 227168404Spjd Loc = SourceMgr.getInstantiationLoc(Loc); 228168404Spjd // FIXME: Should use presumed line #! 229168404Spjd CurLine = SourceMgr.getInstantiationLineNumber(Loc); 230168404Spjd 231168404Spjd if (DisableLineMarkers) return; 232168404Spjd 233168404Spjd CurFilename.clear(); 234168404Spjd CurFilename += SourceMgr.getPresumedLoc(Loc).getFilename(); 235168404Spjd Lexer::Stringify(CurFilename); 236168404Spjd FileType = NewFileType; 237168404Spjd 238168404Spjd if (!Initialized) { 239168404Spjd WriteLineInfo(CurLine); 240168404Spjd Initialized = true; 241168404Spjd } 242168404Spjd 243168404Spjd switch (Reason) { 244168404Spjd case PPCallbacks::EnterFile: 245168404Spjd WriteLineInfo(CurLine, " 1", 2); 246168404Spjd break; 247168404Spjd case PPCallbacks::ExitFile: 248168404Spjd WriteLineInfo(CurLine, " 2", 2); 249168404Spjd break; 250168404Spjd case PPCallbacks::SystemHeaderPragma: 251168404Spjd case PPCallbacks::RenameFile: 252168404Spjd WriteLineInfo(CurLine); 253168404Spjd break; 254168404Spjd } 255168404Spjd} 256168404Spjd 257168404Spjd/// Ident - Handle #ident directives when read by the preprocessor. 258168404Spjd/// 259168404Spjdvoid PrintPPOutputPPCallbacks::Ident(SourceLocation Loc, const std::string &S) { 260168404Spjd MoveToLine(Loc); 261168404Spjd 262168404Spjd OS.write("#ident ", strlen("#ident ")); 263168404Spjd OS.write(&S[0], S.size()); 264168404Spjd EmittedTokensOnThisLine = true; 265168404Spjd} 266168404Spjd 267168404Spjd/// MacroDefined - This hook is called whenever a macro definition is seen. 268168404Spjdvoid PrintPPOutputPPCallbacks::MacroDefined(const IdentifierInfo *II, 269168404Spjd const MacroInfo *MI) { 270168404Spjd // Only print out macro definitions in -dD mode. 271168404Spjd if (!DumpDefines || 272168404Spjd // Ignore __FILE__ etc. 273168404Spjd MI->isBuiltinMacro()) return; 274168404Spjd 275168404Spjd MoveToLine(MI->getDefinitionLoc()); 276168404Spjd PrintMacroDefinition(*II, *MI, PP, OS); 277168404Spjd EmittedMacroOnThisLine = true; 278168404Spjd} 279168404Spjd 280168404Spjd 281168404Spjdvoid PrintPPOutputPPCallbacks::PragmaComment(SourceLocation Loc, 282168404Spjd const IdentifierInfo *Kind, 283168404Spjd const std::string &Str) { 284168404Spjd MoveToLine(Loc); 285168404Spjd OS << "#pragma comment(" << Kind->getName(); 286168404Spjd 287168404Spjd if (!Str.empty()) { 288168404Spjd OS << ", \""; 289168404Spjd 290168404Spjd for (unsigned i = 0, e = Str.size(); i != e; ++i) { 291168404Spjd unsigned char Char = Str[i]; 292168404Spjd if (isprint(Char) && Char != '\\' && Char != '"') 293168404Spjd OS << (char)Char; 294168404Spjd else // Output anything hard as an octal escape. 295168404Spjd OS << '\\' 296168404Spjd << (char)('0'+ ((Char >> 6) & 7)) 297168404Spjd << (char)('0'+ ((Char >> 3) & 7)) 298185029Spjd << (char)('0'+ ((Char >> 0) & 7)); 299185029Spjd } 300168404Spjd OS << '"'; 301168404Spjd } 302168404Spjd 303168404Spjd OS << ')'; 304168404Spjd EmittedTokensOnThisLine = true; 305168404Spjd} 306168404Spjd 307168404Spjd 308168404Spjd/// HandleFirstTokOnLine - When emitting a preprocessed file in -E mode, this 309168404Spjd/// is called for the first token on each new line. If this really is the start 310168404Spjd/// of a new logical line, handle it and return true, otherwise return false. 311168404Spjd/// This may not be the start of a logical line because the "start of line" 312168404Spjd/// marker is set for spelling lines, not instantiation ones. 313168404Spjdbool PrintPPOutputPPCallbacks::HandleFirstTokOnLine(Token &Tok) { 314168404Spjd // Figure out what line we went to and insert the appropriate number of 315168404Spjd // newline characters. 316168404Spjd if (!MoveToLine(Tok.getLocation())) 317168404Spjd return false; 318168404Spjd 319168404Spjd // Print out space characters so that the first token on a line is 320168404Spjd // indented for easy reading. 321168404Spjd const SourceManager &SourceMgr = PP.getSourceManager(); 322168404Spjd unsigned ColNo = SourceMgr.getInstantiationColumnNumber(Tok.getLocation()); 323168404Spjd 324168404Spjd // This hack prevents stuff like: 325168404Spjd // #define HASH # 326168404Spjd // HASH define foo bar 327168404Spjd // From having the # character end up at column 1, which makes it so it 328168404Spjd // is not handled as a #define next time through the preprocessor if in 329168404Spjd // -fpreprocessed mode. 330168404Spjd if (ColNo <= 1 && Tok.is(tok::hash)) 331168404Spjd OS << ' '; 332168404Spjd 333168404Spjd // Otherwise, indent the appropriate number of spaces. 334168404Spjd for (; ColNo > 1; --ColNo) 335168404Spjd OS << ' '; 336168404Spjd 337168404Spjd return true; 338168404Spjd} 339168404Spjd 340168404Spjdvoid PrintPPOutputPPCallbacks::HandleNewlinesInToken(const char *TokStr, 341168404Spjd unsigned Len) { 342168404Spjd unsigned NumNewlines = 0; 343168404Spjd for (; Len; --Len, ++TokStr) { 344168404Spjd if (*TokStr != '\n' && 345168404Spjd *TokStr != '\r') 346168404Spjd continue; 347168404Spjd 348168404Spjd ++NumNewlines; 349168404Spjd 350168404Spjd // If we have \n\r or \r\n, skip both and count as one line. 351168404Spjd if (Len != 1 && 352168404Spjd (TokStr[1] == '\n' || TokStr[1] == '\r') && 353168404Spjd TokStr[0] != TokStr[1]) 354168404Spjd ++TokStr, --Len; 355168404Spjd } 356168404Spjd 357168404Spjd if (NumNewlines == 0) return; 358168404Spjd 359168404Spjd CurLine += NumNewlines; 360168404Spjd} 361168404Spjd 362168404Spjd 363168404Spjdnamespace { 364168404Spjdstruct UnknownPragmaHandler : public PragmaHandler { 365168404Spjd const char *Prefix; 366168404Spjd PrintPPOutputPPCallbacks *Callbacks; 367168404Spjd 368168404Spjd UnknownPragmaHandler(const char *prefix, PrintPPOutputPPCallbacks *callbacks) 369168404Spjd : PragmaHandler(0), Prefix(prefix), Callbacks(callbacks) {} 370168404Spjd virtual void HandlePragma(Preprocessor &PP, Token &PragmaTok) { 371168404Spjd // Figure out what line we went to and insert the appropriate number of 372168404Spjd // newline characters. 373168404Spjd Callbacks->MoveToLine(PragmaTok.getLocation()); 374168404Spjd Callbacks->OS.write(Prefix, strlen(Prefix)); 375168404Spjd 376168404Spjd // Read and print all of the pragma tokens. 377168404Spjd while (PragmaTok.isNot(tok::eom)) { 378168404Spjd if (PragmaTok.hasLeadingSpace()) 379168404Spjd Callbacks->OS << ' '; 380168404Spjd std::string TokSpell = PP.getSpelling(PragmaTok); 381168404Spjd Callbacks->OS.write(&TokSpell[0], TokSpell.size()); 382168404Spjd PP.LexUnexpandedToken(PragmaTok); 383168404Spjd } 384168404Spjd Callbacks->OS << '\n'; 385168404Spjd } 386168404Spjd}; 387168404Spjd} // end anonymous namespace 388168404Spjd 389168404Spjd 390168404Spjdstatic void PrintPreprocessedTokens(Preprocessor &PP, Token &Tok, 391168404Spjd PrintPPOutputPPCallbacks *Callbacks, 392168404Spjd llvm::raw_ostream &OS) { 393168404Spjd char Buffer[256]; 394168404Spjd Token PrevTok; 395168404Spjd while (1) { 396168404Spjd 397168404Spjd // If this token is at the start of a line, emit newlines if needed. 398168404Spjd if (Tok.isAtStartOfLine() && Callbacks->HandleFirstTokOnLine(Tok)) { 399168404Spjd // done. 400168404Spjd } else if (Tok.hasLeadingSpace() || 401168404Spjd // If we haven't emitted a token on this line yet, PrevTok isn't 402168404Spjd // useful to look at and no concatenation could happen anyway. 403168404Spjd (Callbacks->hasEmittedTokensOnThisLine() && 404168404Spjd // Don't print "-" next to "-", it would form "--". 405168404Spjd Callbacks->AvoidConcat(PrevTok, Tok))) { 406168404Spjd OS << ' '; 407168404Spjd } 408168404Spjd 409168404Spjd if (IdentifierInfo *II = Tok.getIdentifierInfo()) { 410168404Spjd OS << II->getName(); 411168404Spjd } else if (Tok.isLiteral() && !Tok.needsCleaning() && 412168404Spjd Tok.getLiteralData()) { 413168404Spjd OS.write(Tok.getLiteralData(), Tok.getLength()); 414168404Spjd } else if (Tok.getLength() < 256) { 415168404Spjd const char *TokPtr = Buffer; 416168404Spjd unsigned Len = PP.getSpelling(Tok, TokPtr); 417168404Spjd OS.write(TokPtr, Len); 418168404Spjd 419168404Spjd // Tokens that can contain embedded newlines need to adjust our current 420168404Spjd // line number. 421168404Spjd if (Tok.getKind() == tok::comment) 422168404Spjd Callbacks->HandleNewlinesInToken(TokPtr, Len); 423168404Spjd } else { 424168404Spjd std::string S = PP.getSpelling(Tok); 425168404Spjd OS.write(&S[0], S.size()); 426168404Spjd 427168404Spjd // Tokens that can contain embedded newlines need to adjust our current 428168404Spjd // line number. 429168404Spjd if (Tok.getKind() == tok::comment) 430168404Spjd Callbacks->HandleNewlinesInToken(&S[0], S.size()); 431168404Spjd } 432168404Spjd Callbacks->SetEmittedTokensOnThisLine(); 433168404Spjd 434168404Spjd if (Tok.is(tok::eof)) break; 435168404Spjd 436168404Spjd PrevTok = Tok; 437168404Spjd PP.Lex(Tok); 438168404Spjd } 439185029Spjd} 440185029Spjd 441185029Spjdtypedef std::pair<IdentifierInfo*, MacroInfo*> id_macro_pair; 442185029Spjdstatic int MacroIDCompare(const void* a, const void* b) { 443185029Spjd const id_macro_pair *LHS = static_cast<const id_macro_pair*>(a); 444185029Spjd const id_macro_pair *RHS = static_cast<const id_macro_pair*>(b); 445185029Spjd return LHS->first->getName().compare(RHS->first->getName()); 446185029Spjd} 447185029Spjd 448185029Spjdstatic void DoPrintMacros(Preprocessor &PP, llvm::raw_ostream *OS) { 449168404Spjd // -dM mode just scans and ignores all tokens in the files, then dumps out 450168404Spjd // the macro table at the end. 451168404Spjd PP.EnterMainSourceFile(); 452168404Spjd 453168404Spjd Token Tok; 454168404Spjd do PP.Lex(Tok); 455168404Spjd while (Tok.isNot(tok::eof)); 456168404Spjd 457168404Spjd llvm::SmallVector<id_macro_pair, 128> 458168404Spjd MacrosByID(PP.macro_begin(), PP.macro_end()); 459168404Spjd llvm::array_pod_sort(MacrosByID.begin(), MacrosByID.end(), MacroIDCompare); 460168404Spjd 461168404Spjd for (unsigned i = 0, e = MacrosByID.size(); i != e; ++i) { 462168404Spjd MacroInfo &MI = *MacrosByID[i].second; 463168404Spjd // Ignore computed macros like __LINE__ and friends. 464168404Spjd if (MI.isBuiltinMacro()) continue; 465168404Spjd 466168404Spjd PrintMacroDefinition(*MacrosByID[i].first, MI, PP, *OS); 467168404Spjd *OS << '\n'; 468168404Spjd } 469168404Spjd} 470168404Spjd 471168404Spjd/// DoPrintPreprocessedInput - This implements -E mode. 472185029Spjd/// 473168404Spjdvoid clang::DoPrintPreprocessedInput(Preprocessor &PP, llvm::raw_ostream *OS, 474185029Spjd const PreprocessorOutputOptions &Opts) { 475185029Spjd // Show macros with no output is handled specially. 476185029Spjd if (!Opts.ShowCPP) { 477185029Spjd assert(Opts.ShowMacros && "Not yet implemented!"); 478185029Spjd DoPrintMacros(PP, OS); 479185029Spjd return; 480185029Spjd } 481185029Spjd 482185029Spjd // Inform the preprocessor whether we want it to retain comments or not, due 483185029Spjd // to -C or -CC. 484185029Spjd PP.SetCommentRetentionState(Opts.ShowComments, Opts.ShowMacroComments); 485185029Spjd 486185029Spjd OS->SetBufferSize(64*1024); 487185029Spjd 488168404Spjd PrintPPOutputPPCallbacks *Callbacks = 489168404Spjd new PrintPPOutputPPCallbacks(PP, *OS, !Opts.ShowLineMarkers, 490185029Spjd Opts.ShowMacros); 491185029Spjd PP.AddPragmaHandler(0, new UnknownPragmaHandler("#pragma", Callbacks)); 492185029Spjd PP.AddPragmaHandler("GCC", new UnknownPragmaHandler("#pragma GCC", 493185029Spjd Callbacks)); 494185029Spjd 495185029Spjd PP.addPPCallbacks(Callbacks); 496185029Spjd 497185029Spjd // After we have configured the preprocessor, enter the main file. 498185029Spjd PP.EnterMainSourceFile(); 499185029Spjd 500185029Spjd // Consume all of the tokens that come from the predefines buffer. Those 501185029Spjd // should not be emitted into the output and are guaranteed to be at the 502185029Spjd // start. 503168404Spjd const SourceManager &SourceMgr = PP.getSourceManager(); 504168404Spjd Token Tok; 505168404Spjd do PP.Lex(Tok); 506168404Spjd while (Tok.isNot(tok::eof) && Tok.getLocation().isFileID() && 507168404Spjd !strcmp(SourceMgr.getPresumedLoc(Tok.getLocation()).getFilename(), 508168404Spjd "<built-in>")); 509168404Spjd 510168404Spjd // Read all the preprocessed tokens, printing them out to the stream. 511168404Spjd PrintPreprocessedTokens(PP, Tok, Callbacks, *OS); 512168404Spjd *OS << '\n'; 513168404Spjd} 514168404Spjd 515185029Spjd