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📄 AArch64TargetParser.h(4.89 KB)
📄 AMDGPUMetadata.h(17.98 KB)
📄 AMDHSAKernelDescriptor.h(7.63 KB)
📄 ARMAttributeParser.h(3.2 KB)
📄 ARMBuildAttributes.h(8.6 KB)
📄 ARMEHABI.h(3.72 KB)
📄 ARMTargetParser.def(18.94 KB)
📄 ARMTargetParser.h(8.76 KB)
📄 ARMWinEH.h(18.27 KB)
📄 AlignOf.h(1.56 KB)
📄 Alignment.h(12.95 KB)
📄 Allocator.h(16.54 KB)
📄 AllocatorBase.h(3.87 KB)
📄 ArrayRecycler.h(4.78 KB)
📄 Atomic.h(1.09 KB)
📄 AtomicOrdering.h(6.01 KB)
📄 Automaton.h(9.64 KB)
📄 Base64.h(1.84 KB)
📄 BinaryByteStream.h(9.14 KB)
📄 BinaryItemStream.h(3.63 KB)
📄 BinaryStream.h(3.75 KB)
📄 BinaryStreamArray.h(12.46 KB)
📄 BinaryStreamError.h(1.29 KB)
📄 BinaryStreamReader.h(11.01 KB)
📄 BinaryStreamRef.h(10.09 KB)
📄 BinaryStreamWriter.h(7.79 KB)
📄 BlockFrequency.h(2.41 KB)
📄 BranchProbability.h(7.92 KB)
📄 BuryPointer.h(1.03 KB)
📄 CBindingWrapping.h(1.86 KB)
📄 CFGDiff.h(9.95 KB)
📄 CFGUpdate.h(4.12 KB)
📄 COM.h(1004 B)
📄 CRC.h(1.63 KB)
📄 CachePruning.h(3.5 KB)
📄 Capacity.h(972 B)
📄 Casting.h(13.92 KB)
📄 CheckedArithmetic.h(3.71 KB)
📄 Chrono.h(5.78 KB)
📄 CodeGen.h(1.96 KB)
📄 CodeGenCoverage.h(1.18 KB)
📄 CommandLine.h(71.22 KB)
📄 Compiler.h(19.5 KB)
📄 Compression.h(1.39 KB)
📄 ConvertUTF.h(11.4 KB)
📄 CrashRecoveryContext.h(9.26 KB)
📄 DJB.h(1.05 KB)
📄 DOTGraphTraits.h(5.58 KB)
📄 DataExtractor.h(30.28 KB)
📄 DataTypes.h(775 B)
📄 Debug.h(4.7 KB)
📄 DebugCounter.h(7.01 KB)
📄 DynamicLibrary.h(5.77 KB)
📄 ELFAttributeParser.h(2.22 KB)
📄 ELFAttributes.h(1.02 KB)
📄 Endian.h(14.28 KB)
📄 EndianStream.h(1.93 KB)
📄 Errc.h(3.8 KB)
📄 Errno.h(1.45 KB)
📄 Error.h(43.82 KB)
📄 ErrorHandling.h(6.39 KB)
📄 ErrorOr.h(7.48 KB)
📄 ExtensibleRTTI.h(4.02 KB)
📄 FileCheck.h(6.69 KB)
📄 FileCollector.h(3.74 KB)
📄 FileOutputBuffer.h(3.36 KB)
📄 FileSystem.h(53.03 KB)
📄 FileUtilities.h(3.83 KB)
📄 Format.h(9.45 KB)
📄 FormatAdapters.h(3.38 KB)
📄 FormatCommon.h(2.05 KB)
📄 FormatProviders.h(15.27 KB)
📄 FormatVariadic.h(9.88 KB)
📄 FormatVariadicDetails.h(5.3 KB)
📄 FormattedStream.h(6.42 KB)
📄 GenericDomTree.h(30.89 KB)
📄 GenericDomTreeConstruction.h(63.42 KB)
📄 GenericIteratedDominanceFrontier.h(7.31 KB)
📄 GlobPattern.h(1.35 KB)
📄 GraphWriter.h(11.79 KB)
📄 Host.h(2.68 KB)
📄 InitLLVM.h(1.79 KB)
📄 ItaniumManglingCanonicalizer.h(3.17 KB)
📄 JSON.h(28.25 KB)
📄 KnownBits.h(8.35 KB)
📄 LEB128.h(5.74 KB)
📄 LineIterator.h(2.62 KB)
📄 Locale.h(223 B)
📄 LockFileManager.h(3.13 KB)
📄 LowLevelTypeImpl.h(11.94 KB)
📄 MD5.h(3.39 KB)
📄 MSVCErrorWorkarounds.h(2.62 KB)
📄 MachineValueType.h(42.37 KB)
📄 ManagedStatic.h(4.21 KB)
📄 MathExtras.h(32.81 KB)
📄 MemAlloc.h(3.21 KB)
📄 Memory.h(6.94 KB)
📄 MemoryBuffer.h(10.98 KB)
📄 MipsABIFlags.h(3.92 KB)
📄 Mutex.h(2.14 KB)
📄 NativeFormatting.h(1.64 KB)
📄 OnDiskHashTable.h(21.97 KB)
📄 OptimizedStructLayout.h(5.89 KB)
📄 Parallel.h(5.99 KB)
📄 Path.h(15.6 KB)
📄 PluginLoader.h(1.29 KB)
📄 PointerLikeTypeTraits.h(5.69 KB)
📄 PrettyStackTrace.h(4.45 KB)
📄 Printable.h(1.5 KB)
📄 Process.h(9.31 KB)
📄 Program.h(10.35 KB)
📄 RISCVAttributeParser.h(1.15 KB)
📄 RISCVAttributes.h(1.2 KB)
📄 RISCVTargetParser.def(446 B)
📄 RWMutex.h(5.65 KB)
📄 RandomNumberGenerator.h(2.29 KB)
📄 Recycler.h(3.47 KB)
📄 RecyclingAllocator.h(2.38 KB)
📄 Regex.h(4.37 KB)
📄 Registry.h(5.14 KB)
📄 ReverseIteration.h(360 B)
📄 SHA1.h(2.37 KB)
📄 SMLoc.h(1.78 KB)
📄 SMTAPI.h(16.33 KB)
📄 SaveAndRestore.h(1.02 KB)
📄 ScaledNumber.h(30.65 KB)
📄 ScopedPrinter.h(11.39 KB)
📄 Signals.h(5.22 KB)
📄 Signposts.h(1.29 KB)
📄 SmallVectorMemoryBuffer.h(2.28 KB)
📁 Solaris
📄 SourceMgr.h(10.37 KB)
📄 SpecialCaseList.h(6.01 KB)
📄 StringSaver.h(1.94 KB)
📄 SuffixTree.h(13.15 KB)
📄 SwapByteOrder.h(4.8 KB)
📄 SymbolRemappingReader.h(4.36 KB)
📄 SystemUtils.h(1.02 KB)
📄 TarWriter.h(941 B)
📄 TargetOpcodes.def(22.01 KB)
📄 TargetParser.h(4.08 KB)
📄 TargetRegistry.h(46.87 KB)
📄 TargetSelect.h(6.2 KB)
📄 TaskQueue.h(4.24 KB)
📄 ThreadLocal.h(2.08 KB)
📄 ThreadPool.h(3.44 KB)
📄 Threading.h(10.62 KB)
📄 TimeProfiler.h(3.46 KB)
📄 Timer.h(8.93 KB)
📄 ToolOutputFile.h(2.24 KB)
📄 TrailingObjects.h(15.19 KB)
📄 TrigramIndex.h(2.84 KB)
📄 TypeName.h(2.13 KB)
📄 TypeSize.h(8.53 KB)
📄 Unicode.h(2.5 KB)
📄 UnicodeCharRanges.h(3.27 KB)
📄 Valgrind.h(1.16 KB)
📄 VersionTuple.h(5.22 KB)
📄 VirtualFileSystem.h(28.28 KB)
📄 Watchdog.h(1.15 KB)
📄 Win64EH.h(4.82 KB)
📁 Windows
📄 WindowsError.h(541 B)
📄 WithColor.h(4.64 KB)
📄 X86DisassemblerDecoderCommon.h(29.39 KB)
📄 X86TargetParser.def(8.21 KB)
📄 X86TargetParser.h(3.57 KB)
📄 YAMLParser.h(16.29 KB)
📄 YAMLTraits.h(67.62 KB)
📄 circular_raw_ostream.h(4.97 KB)
📄 raw_os_ostream.h(1.29 KB)
📄 raw_ostream.h(20.82 KB)
📄 raw_sha1_ostream.h(1.29 KB)
📄 thread.h(1.33 KB)
📄 type_traits.h(6.75 KB)
📄 xxhash.h(1.92 KB)

Editing: BinaryStreamRef.h

//===- BinaryStreamRef.h - A copyable reference to a stream -----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_BINARYSTREAMREF_H
#define LLVM_SUPPORT_BINARYSTREAMREF_H

#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/Optional.h"
#include "llvm/Support/BinaryStream.h"
#include "llvm/Support/BinaryStreamError.h"
#include "llvm/Support/Error.h"
#include <algorithm>
#include <cstdint>
#include <memory>

namespace llvm {

/// Common stuff for mutable and immutable StreamRefs.
template <class RefType, class StreamType> class BinaryStreamRefBase {
protected:
  BinaryStreamRefBase() = default;
  explicit BinaryStreamRefBase(StreamType &BorrowedImpl)
      : BorrowedImpl(&BorrowedImpl), ViewOffset(0) {
    if (!(BorrowedImpl.getFlags() & BSF_Append))
      Length = BorrowedImpl.getLength();
  }

BinaryStreamRefBase(std::shared_ptr<StreamType> SharedImpl, uint32_t Offset,
                      Optional<uint32_t> Length)
      : SharedImpl(SharedImpl), BorrowedImpl(SharedImpl.get()),
        ViewOffset(Offset), Length(Length) {}
  BinaryStreamRefBase(StreamType &BorrowedImpl, uint32_t Offset,
                      Optional<uint32_t> Length)
      : BorrowedImpl(&BorrowedImpl), ViewOffset(Offset), Length(Length) {}
  BinaryStreamRefBase(const BinaryStreamRefBase &Other) = default;
  BinaryStreamRefBase &operator=(const BinaryStreamRefBase &Other) = default;

BinaryStreamRefBase &operator=(BinaryStreamRefBase &&Other) = default;
  BinaryStreamRefBase(BinaryStreamRefBase &&Other) = default;

public:
  llvm::support::endianness getEndian() const {
    return BorrowedImpl->getEndian();
  }

uint32_t getLength() const {
    if (Length.hasValue())
      return *Length;

return BorrowedImpl ? (BorrowedImpl->getLength() - ViewOffset) : 0;
  }

/// Return a new BinaryStreamRef with the first \p N elements removed.  If
  /// this BinaryStreamRef is length-tracking, then the resulting one will be
  /// too.
  RefType drop_front(uint32_t N) const {
    if (!BorrowedImpl)
      return RefType();

N = std::min(N, getLength());
    RefType Result(static_cast<const RefType &>(*this));
    if (N == 0)
      return Result;

Result.ViewOffset += N;
    if (Result.Length.hasValue())
      *Result.Length -= N;
    return Result;
  }

/// Return a new BinaryStreamRef with the last \p N elements removed.  If
  /// this BinaryStreamRef is length-tracking and \p N is greater than 0, then
  /// this BinaryStreamRef will no longer length-track.
  RefType drop_back(uint32_t N) const {
    if (!BorrowedImpl)
      return RefType();

RefType Result(static_cast<const RefType &>(*this));
    N = std::min(N, getLength());

if (N == 0)
      return Result;

// Since we're dropping non-zero bytes from the end, stop length-tracking
    // by setting the length of the resulting StreamRef to an explicit value.
    if (!Result.Length.hasValue())
      Result.Length = getLength();

*Result.Length -= N;
    return Result;
  }

/// Return a new BinaryStreamRef with only the first \p N elements remaining.
  RefType keep_front(uint32_t N) const {
    assert(N <= getLength());
    return drop_back(getLength() - N);
  }

/// Return a new BinaryStreamRef with only the last \p N elements remaining.
  RefType keep_back(uint32_t N) const {
    assert(N <= getLength());
    return drop_front(getLength() - N);
  }

/// Return a new BinaryStreamRef with the first and last \p N elements
  /// removed.
  RefType drop_symmetric(uint32_t N) const {
    return drop_front(N).drop_back(N);
  }

/// Return a new BinaryStreamRef with the first \p Offset elements removed,
  /// and retaining exactly \p Len elements.
  RefType slice(uint32_t Offset, uint32_t Len) const {
    return drop_front(Offset).keep_front(Len);
  }

bool valid() const { return BorrowedImpl != nullptr; }

bool operator==(const RefType &Other) const {
    if (BorrowedImpl != Other.BorrowedImpl)
      return false;
    if (ViewOffset != Other.ViewOffset)
      return false;
    if (Length != Other.Length)
      return false;
    return true;
  }

protected:
  Error checkOffsetForRead(uint32_t Offset, uint32_t DataSize) const {
    if (Offset > getLength())
      return make_error<BinaryStreamError>(stream_error_code::invalid_offset);
    if (getLength() < DataSize + Offset)
      return make_error<BinaryStreamError>(stream_error_code::stream_too_short);
    return Error::success();
  }

std::shared_ptr<StreamType> SharedImpl;
  StreamType *BorrowedImpl = nullptr;
  uint32_t ViewOffset = 0;
  Optional<uint32_t> Length;
};

/// BinaryStreamRef is to BinaryStream what ArrayRef is to an Array.  It
/// provides copy-semantics and read only access to a "window" of the underlying
/// BinaryStream. Note that BinaryStreamRef is *not* a BinaryStream.  That is to
/// say, it does not inherit and override the methods of BinaryStream.  In
/// general, you should not pass around pointers or references to BinaryStreams
/// and use inheritance to achieve polymorphism.  Instead, you should pass
/// around BinaryStreamRefs by value and achieve polymorphism that way.
class BinaryStreamRef
    : public BinaryStreamRefBase<BinaryStreamRef, BinaryStream> {
  friend BinaryStreamRefBase<BinaryStreamRef, BinaryStream>;
  friend class WritableBinaryStreamRef;
  BinaryStreamRef(std::shared_ptr<BinaryStream> Impl, uint32_t ViewOffset,
                  Optional<uint32_t> Length)
      : BinaryStreamRefBase(Impl, ViewOffset, Length) {}

public:
  BinaryStreamRef() = default;
  BinaryStreamRef(BinaryStream &Stream);
  BinaryStreamRef(BinaryStream &Stream, uint32_t Offset,
                  Optional<uint32_t> Length);
  explicit BinaryStreamRef(ArrayRef<uint8_t> Data,
                           llvm::support::endianness Endian);
  explicit BinaryStreamRef(StringRef Data, llvm::support::endianness Endian);

BinaryStreamRef(const BinaryStreamRef &Other) = default;
  BinaryStreamRef &operator=(const BinaryStreamRef &Other) = default;
  BinaryStreamRef(BinaryStreamRef &&Other) = default;
  BinaryStreamRef &operator=(BinaryStreamRef &&Other) = default;

// Use BinaryStreamRef.slice() instead.
  BinaryStreamRef(BinaryStreamRef &S, uint32_t Offset,
                  uint32_t Length) = delete;

/// Given an Offset into this StreamRef and a Size, return a reference to a
  /// buffer owned by the stream.
  ///
  /// \returns a success error code if the entire range of data is within the
  /// bounds of this BinaryStreamRef's view and the implementation could read
  /// the data, and an appropriate error code otherwise.
  Error readBytes(uint32_t Offset, uint32_t Size,
                  ArrayRef<uint8_t> &Buffer) const;

/// Given an Offset into this BinaryStreamRef, return a reference to the
  /// largest buffer the stream could support without necessitating a copy.
  ///
  /// \returns a success error code if implementation could read the data,
  /// and an appropriate error code otherwise.
  Error readLongestContiguousChunk(uint32_t Offset,
                                   ArrayRef<uint8_t> &Buffer) const;
};

struct BinarySubstreamRef {
  uint32_t Offset = 0;        // Offset in the parent stream
  BinaryStreamRef StreamData; // Stream Data

BinarySubstreamRef slice(uint32_t Off, uint32_t Size) const {
    BinaryStreamRef SubSub = StreamData.slice(Off, Size);
    return {Off + Offset, SubSub};
  }
  BinarySubstreamRef drop_front(uint32_t N) const {
    return slice(N, size() - N);
  }
  BinarySubstreamRef keep_front(uint32_t N) const { return slice(0, N); }

std::pair<BinarySubstreamRef, BinarySubstreamRef>
  split(uint32_t Off) const {
    return std::make_pair(keep_front(Off), drop_front(Off));
  }

uint32_t size() const { return StreamData.getLength(); }
  bool empty() const { return size() == 0; }
};

class WritableBinaryStreamRef
    : public BinaryStreamRefBase<WritableBinaryStreamRef,
                                 WritableBinaryStream> {
  friend BinaryStreamRefBase<WritableBinaryStreamRef, WritableBinaryStream>;
  WritableBinaryStreamRef(std::shared_ptr<WritableBinaryStream> Impl,
                          uint32_t ViewOffset, Optional<uint32_t> Length)
      : BinaryStreamRefBase(Impl, ViewOffset, Length) {}

Error checkOffsetForWrite(uint32_t Offset, uint32_t DataSize) const {
    if (!(BorrowedImpl->getFlags() & BSF_Append))
      return checkOffsetForRead(Offset, DataSize);

if (Offset > getLength())
      return make_error<BinaryStreamError>(stream_error_code::invalid_offset);
    return Error::success();
  }

public:
  WritableBinaryStreamRef() = default;
  WritableBinaryStreamRef(WritableBinaryStream &Stream);
  WritableBinaryStreamRef(WritableBinaryStream &Stream, uint32_t Offset,
                          Optional<uint32_t> Length);
  explicit WritableBinaryStreamRef(MutableArrayRef<uint8_t> Data,
                                   llvm::support::endianness Endian);
  WritableBinaryStreamRef(const WritableBinaryStreamRef &Other) = default;
  WritableBinaryStreamRef &
  operator=(const WritableBinaryStreamRef &Other) = default;

WritableBinaryStreamRef(WritableBinaryStreamRef &&Other) = default;
  WritableBinaryStreamRef &operator=(WritableBinaryStreamRef &&Other) = default;

// Use WritableBinaryStreamRef.slice() instead.
  WritableBinaryStreamRef(WritableBinaryStreamRef &S, uint32_t Offset,
                          uint32_t Length) = delete;

/// Given an Offset into this WritableBinaryStreamRef and some input data,
  /// writes the data to the underlying stream.
  ///
  /// \returns a success error code if the data could fit within the underlying
  /// stream at the specified location and the implementation could write the
  /// data, and an appropriate error code otherwise.
  Error writeBytes(uint32_t Offset, ArrayRef<uint8_t> Data) const;

/// Conver this WritableBinaryStreamRef to a read-only BinaryStreamRef.
  operator BinaryStreamRef() const;

/// For buffered streams, commits changes to the backing store.
  Error commit();
};

} // end namespace llvm

#endif // LLVM_SUPPORT_BINARYSTREAMREF_H

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Editing: BinaryStreamRef.h

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