diff options
Diffstat (limited to 'clang/Driver/RewriteMacros.cpp')
-rw-r--r-- | clang/Driver/RewriteMacros.cpp | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/clang/Driver/RewriteMacros.cpp b/clang/Driver/RewriteMacros.cpp deleted file mode 100644 index b61a13c..0000000 --- a/clang/Driver/RewriteMacros.cpp +++ /dev/null @@ -1,184 +0,0 @@ -//===--- RewriteMacros.cpp - Rewrite macros into their expansions ---------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This code rewrites macro invocations into their expansions. This gives you -// a macro expanded file that retains comments and #includes. -// -//===----------------------------------------------------------------------===// - -#include "clang.h" -#include "clang/Rewrite/Rewriter.h" -#include "clang/Lex/Preprocessor.h" -#include "clang/Basic/SourceManager.h" -#include "llvm/Support/Streams.h" -#include "llvm/System/Path.h" -#include <fstream> -using namespace clang; - -/// isSameToken - Return true if the two specified tokens start have the same -/// content. -static bool isSameToken(Token &RawTok, Token &PPTok) { - if (PPTok.getKind() == RawTok.getKind()) - return true; - - if (PPTok.getIdentifierInfo() && - PPTok.getIdentifierInfo() == RawTok.getIdentifierInfo()) - return true; - - return false; -} - -static void GetNextRawTok(Lexer &RawLex, Token &RawTok, Preprocessor &PP) { - RawLex.LexRawToken(RawTok); - - // If we have an identifier with no identifier info for our raw token, look - // up the indentifier info. - if (RawTok.is(tok::identifier) && !RawTok.getIdentifierInfo()) - RawTok.setIdentifierInfo(PP.LookUpIdentifierInfo(RawTok)); -} - -/// RewriteMacrosInInput - Implement -rewrite-macros mode. -void clang::RewriteMacrosInInput(Preprocessor &PP,const std::string &InFileName, - const std::string &OutFileName) { - SourceManager &SM = PP.getSourceManager(); - - Rewriter Rewrite; - Rewrite.setSourceMgr(SM); - RewriteBuffer &RB = Rewrite.getEditBuffer(SM.getMainFileID()); - - const SourceManager &SourceMgr = PP.getSourceManager(); - std::pair<const char*, const char*> File = - SourceMgr.getBufferData(SM.getMainFileID()); - - // Create a lexer to lex all the tokens of the main file in raw mode. Even - // though it is in raw mode, it will not return comments. - Lexer RawLex(SourceLocation::getFileLoc(SM.getMainFileID(), 0), - PP.getLangOptions(), File.first, File.second); - Token RawTok; - GetNextRawTok(RawLex, RawTok, PP); - - // Get the first preprocessing token. - PP.EnterMainSourceFile(); - Token PPTok; - PP.Lex(PPTok); - - // Preprocess the input file in parallel with raw lexing the main file. Ignore - // all tokens that are preprocessed from a file other than the main file (e.g. - // a header). If we see tokens that are in the preprocessed file bug not the - // lexed file, we have a macro expansion. If we see tokens in the lexed file - // that aren't in the preprocessed view, we have macros that expand to no - // tokens, or macro arguments etc. - while (RawTok.isNot(tok::eof) || PPTok.isNot(tok::eof)) { - SourceLocation PPLoc = SM.getLogicalLoc(PPTok.getLocation()); - - // If PPTok is from a different source file, ignore it. - if (!SM.isFromMainFile(PPLoc)) { - PP.Lex(PPTok); - continue; - } - - // If the raw file hits a preprocessor directive, they will be extra tokens - // in the input file, but we don't want to treat them as such... just ignore - // them. - if (RawTok.is(tok::hash) && RawTok.isAtStartOfLine()) { - GetNextRawTok(RawLex, RawTok, PP); - while (!RawTok.isAtStartOfLine() && RawTok.isNot(tok::eof)) - GetNextRawTok(RawLex, RawTok, PP); - continue; - } - - // Okay, both tokens are from the same file. Get their offsets from the - // start of the file. - unsigned PPOffs = SM.getFullFilePos(PPLoc); - unsigned RawOffs = SM.getFullFilePos(RawTok.getLocation()); - - // If the offsets are the same and the token kind is the same, ignore them. - if (PPOffs == RawOffs && isSameToken(RawTok, PPTok)) { - GetNextRawTok(RawLex, RawTok, PP); - PP.Lex(PPTok); - continue; - } - - // If the PP token is farther along than the raw token, something was - // deleted. Comment out the raw token. - if (RawOffs <= PPOffs) { - // Comment out a whole run of tokens instead of bracketing each one with - // comments. - RB.InsertTextAfter(RawOffs, "/*", 2); - unsigned EndPos; - - // Switch on comment lexing. If we get a comment, we don't want to - // include it as part of our run of tokens, because we don't want to - // nest /* */ comments. - RawLex.SetCommentRetentionState(true); - - do { - EndPos = RawOffs+RawTok.getLength(); - - GetNextRawTok(RawLex, RawTok, PP); - RawOffs = SM.getFullFilePos(RawTok.getLocation()); - - if (RawTok.is(tok::comment)) { - RawLex.SetCommentRetentionState(false); - // Skip past the comment. - GetNextRawTok(RawLex, RawTok, PP); - break; - } - - } while (RawOffs <= PPOffs && !RawTok.isAtStartOfLine() && - (PPOffs != RawOffs || !isSameToken(RawTok, PPTok))); - - RawLex.SetCommentRetentionState(false); - - RB.InsertTextBefore(EndPos, "*/", 2); - continue; - } - - // Otherwise, there was a replacement an expansion. Insert the new token - // in the output buffer. Insert the whole run of new tokens at once to get - // them in the right order. - unsigned InsertPos = PPOffs; - std::string Expansion; - while (PPOffs < RawOffs) { - Expansion += ' ' + PP.getSpelling(PPTok); - PP.Lex(PPTok); - PPLoc = SM.getLogicalLoc(PPTok.getLocation()); - PPOffs = SM.getFullFilePos(PPLoc); - } - Expansion += ' '; - RB.InsertTextBefore(InsertPos, &Expansion[0], Expansion.size()); - } - - // Create the output file. - std::ostream *OutFile; - if (OutFileName == "-") { - OutFile = llvm::cout.stream(); - } else if (!OutFileName.empty()) { - OutFile = new std::ofstream(OutFileName.c_str(), - std::ios_base::binary|std::ios_base::out); - } else if (InFileName == "-") { - OutFile = llvm::cout.stream(); - } else { - llvm::sys::Path Path(InFileName); - Path.eraseSuffix(); - Path.appendSuffix("cpp"); - OutFile = new std::ofstream(Path.toString().c_str(), - std::ios_base::binary|std::ios_base::out); - } - - // Get the buffer corresponding to MainFileID. If we haven't changed it, then - // we are done. - if (const RewriteBuffer *RewriteBuf = - Rewrite.getRewriteBufferFor(SM.getMainFileID())) { - //printf("Changed:\n"); - *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end()); - } else { - fprintf(stderr, "No changes\n"); - } -} |