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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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55
tools/llvm-dis/llvm-dis.cpp
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@@ -28,8 +28,6 @@
#include "llvm/Support/Streams.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Signals.h"
#include <iostream>
#include <fstream>
#include <memory>
using namespace llvm;
@@ -56,7 +54,7 @@ int main(int argc, char **argv) {
try {
cl::ParseCommandLineOptions(argc, argv, "llvm .bc -> .ll disassembler\n");
std::ostream *Out = &std::cout; // Default to printing to stdout.
raw_ostream *Out = &outs(); // Default to printing to stdout.
std::string ErrorMessage;
std::auto_ptr<Module> M;
@@ -80,12 +78,15 @@ int main(int argc, char **argv) {
// Just use stdout. We won't actually print anything on it.
} else if (OutputFilename != "") { // Specified an output filename?
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! Sending to standard output.\n";
} else {
Out = new std::ofstream(OutputFilename.c_str());
std::string ErrorInfo;
Out = new raw_fd_ostream(OutputFilename.c_str(), /*Binary=*/false,
Force, ErrorInfo);
if (!ErrorInfo.empty()) {
errs() << ErrorInfo << '\n';
if (!Force)
errs() << "Use -f command line argument to force output\n";
delete Out;
return 1;
}
}
} else {
@@ -101,38 +102,32 @@ int main(int argc, char **argv) {
OutputFilename = IFN+".ll";
}
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! Sending to standard output.\n";
} else {
Out = new std::ofstream(OutputFilename.c_str());
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
std::string ErrorInfo;
Out = new raw_fd_ostream(OutputFilename.c_str(), /*Binary=*/false,
Force, ErrorInfo);
if (!ErrorInfo.empty()) {
errs() << ErrorInfo << '\n';
if (!Force)
errs() << "Use -f command line argument to force output\n";
delete Out;
return 1;
}
}
}
if (!Out->good()) {
cerr << argv[0] << ": error opening " << OutputFilename
<< ": sending to stdout instead!\n";
Out = &std::cout;
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
}
// All that llvm-dis does is write the assembly to a file.
if (!DontPrint) {
PassManager Passes;
raw_os_ostream L(*Out);
Passes.add(createPrintModulePass(&L));
Passes.add(createPrintModulePass(Out));
Passes.run(*M.get());
}
if (Out != &std::cout) {
((std::ofstream*)Out)->close();
if (Out != &outs())
delete Out;
}
return 0;
} catch (const std::string& msg) {
cerr << argv[0] << ": " << msg << "\n";