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//===-- llvm-strings.cpp - Printable String dumping utility ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This program is a utility that works like binutils "strings", that is, it
// prints out printable strings in a binary, objdump, or archive file.
//
//===----------------------------------------------------------------------===//
#include "llvm/Object/Binary.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/Signals.h"
#include <cctype>
#include <string>
using namespace llvm;
using namespace llvm::object;
static cl::list<std::string> InputFileNames(cl::Positional,
cl::desc("<input object files>"),
cl::ZeroOrMore);
static cl::opt<bool>
PrintFileName("print-file-name",
cl::desc("Print the name of the file before each string"));
static cl::alias PrintFileNameShort("f", cl::desc(""),
cl::aliasopt(PrintFileName));
static void strings(raw_ostream &OS, StringRef FileName, StringRef Contents) {
auto print = [&OS, FileName](StringRef L) {
if (PrintFileName)
OS << FileName << ": ";
OS << L << '\n';
};
const char *P = nullptr, *E = nullptr, *S = nullptr;
for (P = Contents.begin(), E = Contents.end(); P < E; ++P) {
if (std::isgraph(*P) || std::isblank(*P)) {
if (S == nullptr)
S = P;
} else if (S) {
if (P - S > 3)
print(StringRef(S, P - S));
S = nullptr;
}
}
if (S && E - S > 3)
print(StringRef(S, E - S));
}
int main(int argc, char **argv) {
sys::PrintStackTraceOnErrorSignal(argv[0]);
PrettyStackTraceProgram X(argc, argv);
cl::ParseCommandLineOptions(argc, argv, "llvm string dumper\n");
if (InputFileNames.empty())
InputFileNames.push_back("-");
for (const auto &File : InputFileNames) {
ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer =
MemoryBuffer::getFileOrSTDIN(File);
if (std::error_code EC = Buffer.getError())
errs() << File << ": " << EC.message() << '\n';
else
strings(llvm::outs(), File == "-" ? "{standard input}" : File,
Buffer.get()->getMemBufferRef().getBuffer());
}
return EXIT_SUCCESS;
}
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