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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/llvm-extract/llvm-extract.cpp
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@ -22,10 +22,9 @@
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Signals.h"
#include <iostream>
#include <memory>
#include <fstream>
using namespace llvm;
// InputFilename - The filename to read from.
@ -111,28 +110,28 @@ int main(int argc, char **argv) {
Passes.add(createDeadTypeEliminationPass()); // Remove dead types...
Passes.add(createStripDeadPrototypesPass()); // Remove dead func decls
std::ostream *Out = 0;
raw_ostream *Out = 0;
if (OutputFilename != "-") { // Not stdout?
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";
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;
}
std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
std::ios::binary;
Out = new std::ofstream(OutputFilename.c_str(), io_mode);
} else { // Specified stdout
// FIXME: cout is not binary!
Out = &std::cout;
// FIXME: errs() is not binary!
Out = &errs();
}
Passes.add(CreateBitcodeWriterPass(*Out));
Passes.add(createBitcodeWriterPass(*Out));
Passes.run(*M.get());
if (Out != &std::cout)
if (Out != &errs())
delete Out;
return 0;
}