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📄 AArch64TargetParser.def(12.01 KB)
📄 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: Endian.h

//===- Endian.h - Utilities for IO with endian specific data ----*- 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
//
//===----------------------------------------------------------------------===//
//
// This file declares generic functions to read and write endian specific data.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_ENDIAN_H
#define LLVM_SUPPORT_ENDIAN_H

#include "llvm/Support/Compiler.h"
#include "llvm/Support/SwapByteOrder.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <type_traits>

namespace llvm {
namespace support {

enum endianness {big, little, native};

// These are named values for common alignments.
enum {aligned = 0, unaligned = 1};

namespace detail {

/// ::value is either alignment, or alignof(T) if alignment is 0.
template<class T, int alignment>
struct PickAlignment {
 enum { value = alignment == 0 ? alignof(T) : alignment };
};

} // end namespace detail

namespace endian {

constexpr endianness system_endianness() {
  return sys::IsBigEndianHost ? big : little;
}

template <typename value_type>
inline value_type byte_swap(value_type value, endianness endian) {
  if ((endian != native) && (endian != system_endianness()))
    sys::swapByteOrder(value);
  return value;
}

/// Swap the bytes of value to match the given endianness.
template<typename value_type, endianness endian>
inline value_type byte_swap(value_type value) {
  return byte_swap(value, endian);
}

/// Read a value of a particular endianness from memory.
template <typename value_type, std::size_t alignment>
inline value_type read(const void *memory, endianness endian) {
  value_type ret;

memcpy(&ret,
         LLVM_ASSUME_ALIGNED(
             memory, (detail::PickAlignment<value_type, alignment>::value)),
         sizeof(value_type));
  return byte_swap<value_type>(ret, endian);
}

template<typename value_type,
         endianness endian,
         std::size_t alignment>
inline value_type read(const void *memory) {
  return read<value_type, alignment>(memory, endian);
}

/// Read a value of a particular endianness from a buffer, and increment the
/// buffer past that value.
template <typename value_type, std::size_t alignment, typename CharT>
inline value_type readNext(const CharT *&memory, endianness endian) {
  value_type ret = read<value_type, alignment>(memory, endian);
  memory += sizeof(value_type);
  return ret;
}

template<typename value_type, endianness endian, std::size_t alignment,
         typename CharT>
inline value_type readNext(const CharT *&memory) {
  return readNext<value_type, alignment, CharT>(memory, endian);
}

/// Write a value to memory with a particular endianness.
template <typename value_type, std::size_t alignment>
inline void write(void *memory, value_type value, endianness endian) {
  value = byte_swap<value_type>(value, endian);
  memcpy(LLVM_ASSUME_ALIGNED(
             memory, (detail::PickAlignment<value_type, alignment>::value)),
         &value, sizeof(value_type));
}

template<typename value_type,
         endianness endian,
         std::size_t alignment>
inline void write(void *memory, value_type value) {
  write<value_type, alignment>(memory, value, endian);
}

template <typename value_type>
using make_unsigned_t = std::make_unsigned_t<value_type>;

/// Read a value of a particular endianness from memory, for a location
/// that starts at the given bit offset within the first byte.
template <typename value_type, endianness endian, std::size_t alignment>
inline value_type readAtBitAlignment(const void *memory, uint64_t startBit) {
  assert(startBit < 8);
  if (startBit == 0)
    return read<value_type, endian, alignment>(memory);
  else {
    // Read two values and compose the result from them.
    value_type val[2];
    memcpy(&val[0],
           LLVM_ASSUME_ALIGNED(
               memory, (detail::PickAlignment<value_type, alignment>::value)),
           sizeof(value_type) * 2);
    val[0] = byte_swap<value_type, endian>(val[0]);
    val[1] = byte_swap<value_type, endian>(val[1]);

// Shift bits from the lower value into place.
    make_unsigned_t<value_type> lowerVal = val[0] >> startBit;
    // Mask off upper bits after right shift in case of signed type.
    make_unsigned_t<value_type> numBitsFirstVal =
        (sizeof(value_type) * 8) - startBit;
    lowerVal &= ((make_unsigned_t<value_type>)1 << numBitsFirstVal) - 1;

// Get the bits from the upper value.
    make_unsigned_t<value_type> upperVal =
        val[1] & (((make_unsigned_t<value_type>)1 << startBit) - 1);
    // Shift them in to place.
    upperVal <<= numBitsFirstVal;

return lowerVal | upperVal;
  }
}

/// Write a value to memory with a particular endianness, for a location
/// that starts at the given bit offset within the first byte.
template <typename value_type, endianness endian, std::size_t alignment>
inline void writeAtBitAlignment(void *memory, value_type value,
                                uint64_t startBit) {
  assert(startBit < 8);
  if (startBit == 0)
    write<value_type, endian, alignment>(memory, value);
  else {
    // Read two values and shift the result into them.
    value_type val[2];
    memcpy(&val[0],
           LLVM_ASSUME_ALIGNED(
               memory, (detail::PickAlignment<value_type, alignment>::value)),
           sizeof(value_type) * 2);
    val[0] = byte_swap<value_type, endian>(val[0]);
    val[1] = byte_swap<value_type, endian>(val[1]);

// Mask off any existing bits in the upper part of the lower value that
    // we want to replace.
    val[0] &= ((make_unsigned_t<value_type>)1 << startBit) - 1;
    make_unsigned_t<value_type> numBitsFirstVal =
        (sizeof(value_type) * 8) - startBit;
    make_unsigned_t<value_type> lowerVal = value;
    if (startBit > 0) {
      // Mask off the upper bits in the new value that are not going to go into
      // the lower value. This avoids a left shift of a negative value, which
      // is undefined behavior.
      lowerVal &= (((make_unsigned_t<value_type>)1 << numBitsFirstVal) - 1);
      // Now shift the new bits into place
      lowerVal <<= startBit;
    }
    val[0] |= lowerVal;

// Mask off any existing bits in the lower part of the upper value that
    // we want to replace.
    val[1] &= ~(((make_unsigned_t<value_type>)1 << startBit) - 1);
    // Next shift the bits that go into the upper value into position.
    make_unsigned_t<value_type> upperVal = value >> numBitsFirstVal;
    // Mask off upper bits after right shift in case of signed type.
    upperVal &= ((make_unsigned_t<value_type>)1 << startBit) - 1;
    val[1] |= upperVal;

// Finally, rewrite values.
    val[0] = byte_swap<value_type, endian>(val[0]);
    val[1] = byte_swap<value_type, endian>(val[1]);
    memcpy(LLVM_ASSUME_ALIGNED(
               memory, (detail::PickAlignment<value_type, alignment>::value)),
           &val[0], sizeof(value_type) * 2);
  }
}

} // end namespace endian

namespace detail {

template <typename ValueType, endianness Endian, std::size_t Alignment,
          std::size_t ALIGN = PickAlignment<ValueType, Alignment>::value>
struct packed_endian_specific_integral {
  using value_type = ValueType;
  static constexpr endianness endian = Endian;
  static constexpr std::size_t alignment = Alignment;

packed_endian_specific_integral() = default;

explicit packed_endian_specific_integral(value_type val) { *this = val; }

operator value_type() const {
    return endian::read<value_type, endian, alignment>(
      (const void*)Value.buffer);
  }

void operator=(value_type newValue) {
    endian::write<value_type, endian, alignment>(
      (void*)Value.buffer, newValue);
  }

packed_endian_specific_integral &operator+=(value_type newValue) {
    *this = *this + newValue;
    return *this;
  }

packed_endian_specific_integral &operator-=(value_type newValue) {
    *this = *this - newValue;
    return *this;
  }

packed_endian_specific_integral &operator|=(value_type newValue) {
    *this = *this | newValue;
    return *this;
  }

packed_endian_specific_integral &operator&=(value_type newValue) {
    *this = *this & newValue;
    return *this;
  }

private:
  struct {
    alignas(ALIGN) char buffer[sizeof(value_type)];
  } Value;

public:
  struct ref {
    explicit ref(void *Ptr) : Ptr(Ptr) {}

operator value_type() const {
      return endian::read<value_type, endian, alignment>(Ptr);
    }

void operator=(value_type NewValue) {
      endian::write<value_type, endian, alignment>(Ptr, NewValue);
    }

private:
    void *Ptr;
  };
};

} // end namespace detail

using ulittle16_t =
    detail::packed_endian_specific_integral<uint16_t, little, unaligned>;
using ulittle32_t =
    detail::packed_endian_specific_integral<uint32_t, little, unaligned>;
using ulittle64_t =
    detail::packed_endian_specific_integral<uint64_t, little, unaligned>;

using little16_t =
    detail::packed_endian_specific_integral<int16_t, little, unaligned>;
using little32_t =
    detail::packed_endian_specific_integral<int32_t, little, unaligned>;
using little64_t =
    detail::packed_endian_specific_integral<int64_t, little, unaligned>;

using aligned_ulittle16_t =
    detail::packed_endian_specific_integral<uint16_t, little, aligned>;
using aligned_ulittle32_t =
    detail::packed_endian_specific_integral<uint32_t, little, aligned>;
using aligned_ulittle64_t =
    detail::packed_endian_specific_integral<uint64_t, little, aligned>;

using aligned_little16_t =
    detail::packed_endian_specific_integral<int16_t, little, aligned>;
using aligned_little32_t =
    detail::packed_endian_specific_integral<int32_t, little, aligned>;
using aligned_little64_t =
    detail::packed_endian_specific_integral<int64_t, little, aligned>;

using ubig16_t =
    detail::packed_endian_specific_integral<uint16_t, big, unaligned>;
using ubig32_t =
    detail::packed_endian_specific_integral<uint32_t, big, unaligned>;
using ubig64_t =
    detail::packed_endian_specific_integral<uint64_t, big, unaligned>;

using big16_t =
    detail::packed_endian_specific_integral<int16_t, big, unaligned>;
using big32_t =
    detail::packed_endian_specific_integral<int32_t, big, unaligned>;
using big64_t =
    detail::packed_endian_specific_integral<int64_t, big, unaligned>;

using aligned_ubig16_t =
    detail::packed_endian_specific_integral<uint16_t, big, aligned>;
using aligned_ubig32_t =
    detail::packed_endian_specific_integral<uint32_t, big, aligned>;
using aligned_ubig64_t =
    detail::packed_endian_specific_integral<uint64_t, big, aligned>;

using aligned_big16_t =
    detail::packed_endian_specific_integral<int16_t, big, aligned>;
using aligned_big32_t =
    detail::packed_endian_specific_integral<int32_t, big, aligned>;
using aligned_big64_t =
    detail::packed_endian_specific_integral<int64_t, big, aligned>;

using unaligned_uint16_t =
    detail::packed_endian_specific_integral<uint16_t, native, unaligned>;
using unaligned_uint32_t =
    detail::packed_endian_specific_integral<uint32_t, native, unaligned>;
using unaligned_uint64_t =
    detail::packed_endian_specific_integral<uint64_t, native, unaligned>;

using unaligned_int16_t =
    detail::packed_endian_specific_integral<int16_t, native, unaligned>;
using unaligned_int32_t =
    detail::packed_endian_specific_integral<int32_t, native, unaligned>;
using unaligned_int64_t =
    detail::packed_endian_specific_integral<int64_t, native, unaligned>;

template <typename T>
using little_t = detail::packed_endian_specific_integral<T, little, unaligned>;
template <typename T>
using big_t = detail::packed_endian_specific_integral<T, big, unaligned>;

template <typename T>
using aligned_little_t =
    detail::packed_endian_specific_integral<T, little, aligned>;
template <typename T>
using aligned_big_t = detail::packed_endian_specific_integral<T, big, aligned>;

namespace endian {

template <typename T> inline T read(const void *P, endianness E) {
  return read<T, unaligned>(P, E);
}

template <typename T, endianness E> inline T read(const void *P) {
  return *(const detail::packed_endian_specific_integral<T, E, unaligned> *)P;
}

inline uint16_t read16(const void *P, endianness E) {
  return read<uint16_t>(P, E);
}
inline uint32_t read32(const void *P, endianness E) {
  return read<uint32_t>(P, E);
}
inline uint64_t read64(const void *P, endianness E) {
  return read<uint64_t>(P, E);
}

template <endianness E> inline uint16_t read16(const void *P) {
  return read<uint16_t, E>(P);
}
template <endianness E> inline uint32_t read32(const void *P) {
  return read<uint32_t, E>(P);
}
template <endianness E> inline uint64_t read64(const void *P) {
  return read<uint64_t, E>(P);
}

inline uint16_t read16le(const void *P) { return read16<little>(P); }
inline uint32_t read32le(const void *P) { return read32<little>(P); }
inline uint64_t read64le(const void *P) { return read64<little>(P); }
inline uint16_t read16be(const void *P) { return read16<big>(P); }
inline uint32_t read32be(const void *P) { return read32<big>(P); }
inline uint64_t read64be(const void *P) { return read64<big>(P); }

template <typename T> inline void write(void *P, T V, endianness E) {
  write<T, unaligned>(P, V, E);
}

template <typename T, endianness E> inline void write(void *P, T V) {
  *(detail::packed_endian_specific_integral<T, E, unaligned> *)P = V;
}

inline void write16(void *P, uint16_t V, endianness E) {
  write<uint16_t>(P, V, E);
}
inline void write32(void *P, uint32_t V, endianness E) {
  write<uint32_t>(P, V, E);
}
inline void write64(void *P, uint64_t V, endianness E) {
  write<uint64_t>(P, V, E);
}

template <endianness E> inline void write16(void *P, uint16_t V) {
  write<uint16_t, E>(P, V);
}
template <endianness E> inline void write32(void *P, uint32_t V) {
  write<uint32_t, E>(P, V);
}
template <endianness E> inline void write64(void *P, uint64_t V) {
  write<uint64_t, E>(P, V);
}

inline void write16le(void *P, uint16_t V) { write16<little>(P, V); }
inline void write32le(void *P, uint32_t V) { write32<little>(P, V); }
inline void write64le(void *P, uint64_t V) { write64<little>(P, V); }
inline void write16be(void *P, uint16_t V) { write16<big>(P, V); }
inline void write32be(void *P, uint32_t V) { write32<big>(P, V); }
inline void write64be(void *P, uint64_t V) { write64<big>(P, V); }

} // end namespace endian

} // end namespace support
} // end namespace llvm

#endif // LLVM_SUPPORT_ENDIAN_H

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