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//===--- 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/MemoryBuffer.h"
#include "llvm/Support/Streams.h"
#include "llvm/System/Path.h"
#include <fstream>
using namespace clang;
/// RewriteMacrosInInput - Implement -rewrite-macros mode.
void clang::RewriteMacrosInInput(Preprocessor &PP,
const std::string &OutFileName) {
SourceManager &SM = PP.getSourceManager();
Rewriter Rewrite;
Rewrite.setSourceMgr(SM);
#if 0
// Get the ID and start/end of the main file.
unsigned MainFileID = SM.getMainFileID();
const llvm::MemoryBuffer *MainBuf = SM.getBuffer(MainFileID);
const char *MainFileStart = MainBuf->getBufferStart();
const char *MainFileEnd = MainBuf->getBufferEnd();
// 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(MainFileID)) {
//printf("Changed:\n");
*OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
} else {
fprintf(stderr, "No changes\n");
}
// Emit metadata.
*OutFile << ResultStr;
#endif
}
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