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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
118 lines
3.8 KiB
C++
118 lines
3.8 KiB
C++
//===-- llvm-strings.cpp - Printable String dumping utility ---------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This program is a utility that works like binutils "strings", that is, it
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// prints out printable strings in a binary, objdump, or archive file.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/Binary.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Program.h"
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#include <cctype>
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#include <string>
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using namespace llvm;
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using namespace llvm::object;
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static cl::list<std::string> InputFileNames(cl::Positional,
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cl::desc("<input object files>"),
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cl::ZeroOrMore);
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static cl::opt<bool>
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PrintFileName("print-file-name",
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cl::desc("Print the name of the file before each string"));
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static cl::alias PrintFileNameShort("f", cl::desc(""),
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cl::aliasopt(PrintFileName));
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static cl::opt<int>
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MinLength("bytes", cl::desc("Print sequences of the specified length"),
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cl::init(4));
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static cl::alias MinLengthShort("n", cl::desc(""), cl::aliasopt(MinLength));
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static cl::opt<bool>
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AllSections("all",
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cl::desc("Check all sections, not just the data section"));
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static cl::alias AllSectionsShort("a", cl::desc(""),
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cl::aliasopt(AllSections));
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enum radix { none, octal, hexadecimal, decimal };
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static cl::opt<radix>
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Radix("radix", cl::desc("print the offset within the file"),
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cl::values(clEnumValN(octal, "o", "octal"),
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clEnumValN(hexadecimal, "x", "hexadecimal"),
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clEnumValN(decimal, "d", "decimal")),
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cl::init(none));
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static cl::alias RadixShort("t", cl::desc(""), cl::aliasopt(Radix));
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static void strings(raw_ostream &OS, StringRef FileName, StringRef Contents) {
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auto print = [&OS, FileName](unsigned Offset, StringRef L) {
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if (L.size() < static_cast<size_t>(MinLength))
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return;
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if (PrintFileName)
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OS << FileName << ": ";
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switch (Radix) {
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case none:
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break;
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case octal:
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OS << format("%7o ", Offset);
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break;
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case hexadecimal:
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OS << format("%7x ", Offset);
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break;
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case decimal:
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OS << format("%7u ", Offset);
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break;
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}
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OS << L << '\n';
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};
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const char *B = Contents.begin();
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const char *P = nullptr, *E = nullptr, *S = nullptr;
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for (P = Contents.begin(), E = Contents.end(); P < E; ++P) {
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if (isPrint(*P) || *P == '\t') {
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if (S == nullptr)
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S = P;
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} else if (S) {
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print(S - B, StringRef(S, P - S));
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S = nullptr;
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}
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}
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if (S)
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print(S - B, StringRef(S, E - S));
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}
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int main(int argc, char **argv) {
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InitLLVM X(argc, argv);
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cl::ParseCommandLineOptions(argc, argv, "llvm string dumper\n");
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if (MinLength == 0) {
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errs() << "invalid minimum string length 0\n";
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return EXIT_FAILURE;
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}
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if (InputFileNames.empty())
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InputFileNames.push_back("-");
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for (const auto &File : InputFileNames) {
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ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer =
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MemoryBuffer::getFileOrSTDIN(File);
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if (std::error_code EC = Buffer.getError())
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errs() << File << ": " << EC.message() << '\n';
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else
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strings(llvm::outs(), File == "-" ? "{standard input}" : File,
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Buffer.get()->getMemBufferRef().getBuffer());
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}
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return EXIT_SUCCESS;
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}
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