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Add a Force option to raw_fd_ostream to specify whether opening

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an existing file is considered an error. Convert several tools
to use raw_fd_ostream instead of std::ostream, and to use this
new option instead of doing a manual check.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75801 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-07-15 17:29:42 +00:00
parent 2286f8dc4c
commit a1bdcedc38
12 changed files with 116 additions and 146 deletions
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29
tools/opt/opt.cpp
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@ -35,8 +35,6 @@
#include "llvm/Support/raw_ostream.h"
#include "llvm/LinkAllPasses.h"
#include "llvm/LinkAllVMCore.h"
#include <iostream>
#include <fstream>
#include <memory>
#include <algorithm>
using namespace llvm;
@ -342,21 +340,16 @@ int main(int argc, char **argv) {
// Figure out what stream we are supposed to write to...
// FIXME: cout is not binary!
std::ostream *Out = &std::cout; // Default to printing to stdout...
raw_ostream *Out = &outs(); // Default to printing to stdout...
if (OutputFilename != "-") {
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
cerr << argv[0] << ": error opening '" << OutputFilename
<< "': file exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
std::ios::binary;
Out = new std::ofstream(OutputFilename.c_str(), io_mode);
if (!Out->good()) {
cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
std::string ErrorInfo;
Out = new raw_fd_ostream(OutputFilename.c_str(), /*Binary=*/true,
Force, ErrorInfo);
if (!ErrorInfo.empty()) {
errs() << ErrorInfo << '\n';
if (!Force)
errs() << "Use -f command line argument to force output\n";
delete Out;
return 1;
}
@ -479,13 +472,13 @@ int main(int argc, char **argv) {
// Write bitcode out to disk or cout as the last step...
if (!NoOutput && !AnalyzeOnly)
Passes.add(CreateBitcodeWriterPass(*Out));
Passes.add(createBitcodeWriterPass(*Out));
// Now that we have all of the passes ready, run them.
Passes.run(*M.get());
// Delete the ofstream.
if (Out != &std::cout)
if (Out != &outs())
delete Out;
return 0;