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Diffstat (limited to 'clang/lib/Rewrite/Frontend/RewriteMacros.cpp')
| -rw-r--r-- | clang/lib/Rewrite/Frontend/RewriteMacros.cpp | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/clang/lib/Rewrite/Frontend/RewriteMacros.cpp b/clang/lib/Rewrite/Frontend/RewriteMacros.cpp deleted file mode 100644 index 0d0a991fa6f9..000000000000 --- a/clang/lib/Rewrite/Frontend/RewriteMacros.cpp +++ /dev/null @@ -1,217 +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/Rewrite/Frontend/Rewriters.h" -#include "clang/Basic/SourceManager.h" -#include "clang/Lex/Preprocessor.h" -#include "clang/Rewrite/Core/Rewriter.h" -#include "llvm/Support/Path.h" -#include "llvm/Support/raw_ostream.h" -#include <cstdio> -#include <memory> - -using namespace clang; - -/// isSameToken - Return true if the two specified tokens start have the same -/// content. -static bool isSameToken(Token &RawTok, Token &PPTok) { - // If two tokens have the same kind and the same identifier info, they are - // obviously the same. - if (PPTok.getKind() == RawTok.getKind() && - PPTok.getIdentifierInfo() == RawTok.getIdentifierInfo()) - return true; - - // Otherwise, if they are different but have the same identifier info, they - // are also considered to be the same. This allows keywords and raw lexed - // identifiers with the same name to be treated the same. - if (PPTok.getIdentifierInfo() && - PPTok.getIdentifierInfo() == RawTok.getIdentifierInfo()) - return true; - - return false; -} - - -/// GetNextRawTok - Return the next raw token in the stream, skipping over -/// comments if ReturnComment is false. -static const Token &GetNextRawTok(const std::vector<Token> &RawTokens, - unsigned &CurTok, bool ReturnComment) { - assert(CurTok < RawTokens.size() && "Overran eof!"); - - // If the client doesn't want comments and we have one, skip it. - if (!ReturnComment && RawTokens[CurTok].is(tok::comment)) - ++CurTok; - - return RawTokens[CurTok++]; -} - - -/// LexRawTokensFromMainFile - Lets all the raw tokens from the main file into -/// the specified vector. -static void LexRawTokensFromMainFile(Preprocessor &PP, - std::vector<Token> &RawTokens) { - SourceManager &SM = PP.getSourceManager(); - - // 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. - const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID()); - Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts()); - - // Switch on comment lexing because we really do want them. - RawLex.SetCommentRetentionState(true); - - Token RawTok; - do { - RawLex.LexFromRawLexer(RawTok); - - // If we have an identifier with no identifier info for our raw token, look - // up the indentifier info. This is important for equality comparison of - // identifier tokens. - if (RawTok.is(tok::raw_identifier)) - PP.LookUpIdentifierInfo(RawTok); - - RawTokens.push_back(RawTok); - } while (RawTok.isNot(tok::eof)); -} - - -/// RewriteMacrosInInput - Implement -rewrite-macros mode. -void clang::RewriteMacrosInInput(Preprocessor &PP, raw_ostream *OS) { - SourceManager &SM = PP.getSourceManager(); - - Rewriter Rewrite; - Rewrite.setSourceMgr(SM, PP.getLangOpts()); - RewriteBuffer &RB = Rewrite.getEditBuffer(SM.getMainFileID()); - - std::vector<Token> RawTokens; - LexRawTokensFromMainFile(PP, RawTokens); - unsigned CurRawTok = 0; - Token RawTok = GetNextRawTok(RawTokens, CurRawTok, false); - - - // 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 but 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.getExpansionLoc(PPTok.getLocation()); - - // If PPTok is from a different source file, ignore it. - if (!SM.isWrittenInMainFile(PPLoc)) { - PP.Lex(PPTok); - continue; - } - - // If the raw file hits a preprocessor directive, they will be extra tokens - // in the raw file that don't exist in the preprocsesed file. However, we - // choose to preserve them in the output file and otherwise handle them - // specially. - if (RawTok.is(tok::hash) && RawTok.isAtStartOfLine()) { - // If this is a #warning directive or #pragma mark (GNU extensions), - // comment the line out. - if (RawTokens[CurRawTok].is(tok::identifier)) { - const IdentifierInfo *II = RawTokens[CurRawTok].getIdentifierInfo(); - if (II->getName() == "warning") { - // Comment out #warning. - RB.InsertTextAfter(SM.getFileOffset(RawTok.getLocation()), "//"); - } else if (II->getName() == "pragma" && - RawTokens[CurRawTok+1].is(tok::identifier) && - (RawTokens[CurRawTok+1].getIdentifierInfo()->getName() == - "mark")) { - // Comment out #pragma mark. - RB.InsertTextAfter(SM.getFileOffset(RawTok.getLocation()), "//"); - } - } - - // Otherwise, if this is a #include or some other directive, just leave it - // in the file by skipping over the line. - RawTok = GetNextRawTok(RawTokens, CurRawTok, false); - while (!RawTok.isAtStartOfLine() && RawTok.isNot(tok::eof)) - RawTok = GetNextRawTok(RawTokens, CurRawTok, false); - continue; - } - - // Okay, both tokens are from the same file. Get their offsets from the - // start of the file. - unsigned PPOffs = SM.getFileOffset(PPLoc); - unsigned RawOffs = SM.getFileOffset(RawTok.getLocation()); - - // If the offsets are the same and the token kind is the same, ignore them. - if (PPOffs == RawOffs && isSameToken(RawTok, PPTok)) { - RawTok = GetNextRawTok(RawTokens, CurRawTok, false); - 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. Add a leading space if RawTok didn't have one. - bool HasSpace = RawTok.hasLeadingSpace(); - RB.InsertTextAfter(RawOffs, &" /*"[HasSpace]); - unsigned EndPos; - - do { - EndPos = RawOffs+RawTok.getLength(); - - RawTok = GetNextRawTok(RawTokens, CurRawTok, true); - RawOffs = SM.getFileOffset(RawTok.getLocation()); - - if (RawTok.is(tok::comment)) { - // Skip past the comment. - RawTok = GetNextRawTok(RawTokens, CurRawTok, false); - break; - } - - } while (RawOffs <= PPOffs && !RawTok.isAtStartOfLine() && - (PPOffs != RawOffs || !isSameToken(RawTok, PPTok))); - - RB.InsertTextBefore(EndPos, "*/"); - 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.getExpansionLoc(PPTok.getLocation()); - PPOffs = SM.getFileOffset(PPLoc); - } - Expansion += ' '; - RB.InsertTextBefore(InsertPos, Expansion); - } - - // 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"); - *OS << std::string(RewriteBuf->begin(), RewriteBuf->end()); - } else { - fprintf(stderr, "No changes\n"); - } - OS->flush(); -} |