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📄 AArch64TargetParser.h(4.89 KB)
📄 AMDGPUMetadata.h(17.98 KB)
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📄 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)
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📄 CFGDiff.h(9.95 KB)
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📄 COM.h(1004 B)
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📄 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: circular_raw_ostream.h

//===-- llvm/Support/circular_raw_ostream.h - Buffered streams --*- 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 contains raw_ostream implementations for streams to do circular
// buffering of their output.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_CIRCULAR_RAW_OSTREAM_H
#define LLVM_SUPPORT_CIRCULAR_RAW_OSTREAM_H

#include "llvm/Support/raw_ostream.h"

namespace llvm {
  /// circular_raw_ostream - A raw_ostream which *can* save its data
  /// to a circular buffer, or can pass it through directly to an
  /// underlying stream if specified with a buffer of zero.
  ///
  class circular_raw_ostream : public raw_ostream {
  public:
    /// TAKE_OWNERSHIP - Tell this stream that it owns the underlying
    /// stream and is responsible for cleanup, memory management
    /// issues, etc.
    ///
    static constexpr bool TAKE_OWNERSHIP = true;

/// REFERENCE_ONLY - Tell this stream it should not manage the
    /// held stream.
    ///
    static constexpr bool REFERENCE_ONLY = false;

private:
    /// TheStream - The real stream we output to. We set it to be
    /// unbuffered, since we're already doing our own buffering.
    ///
    raw_ostream *TheStream;

/// OwnsStream - Are we responsible for managing the underlying
    /// stream?
    ///
    bool OwnsStream;

/// BufferSize - The size of the buffer in bytes.
    ///
    size_t BufferSize;

/// BufferArray - The actual buffer storage.
    ///
    char *BufferArray;

/// Cur - Pointer to the current output point in BufferArray.
    ///
    char *Cur;

/// Filled - Indicate whether the buffer has been completely
    /// filled.  This helps avoid garbage output.
    ///
    bool Filled;

/// Banner - A pointer to a banner to print before dumping the
    /// log.
    ///
    const char *Banner;

/// flushBuffer - Dump the contents of the buffer to Stream.
    ///
    void flushBuffer() {
      if (Filled)
        // Write the older portion of the buffer.
        TheStream->write(Cur, BufferArray + BufferSize - Cur);
      // Write the newer portion of the buffer.
      TheStream->write(BufferArray, Cur - BufferArray);
      Cur = BufferArray;
      Filled = false;
    }

void write_impl(const char *Ptr, size_t Size) override;

/// current_pos - Return the current position within the stream,
    /// not counting the bytes currently in the buffer.
    ///
    uint64_t current_pos() const override {
      // This has the same effect as calling TheStream.current_pos(),
      // but that interface is private.
      return TheStream->tell() - TheStream->GetNumBytesInBuffer();
    }

public:
    /// circular_raw_ostream - Construct an optionally
    /// circular-buffered stream, handing it an underlying stream to
    /// do the "real" output.
    ///
    /// As a side effect, if BuffSize is nonzero, the given Stream is
    /// set to be Unbuffered.  This is because circular_raw_ostream
    /// does its own buffering, so it doesn't want another layer of
    /// buffering to be happening underneath it.
    ///
    /// "Owns" tells the circular_raw_ostream whether it is
    /// responsible for managing the held stream, doing memory
    /// management of it, etc.
    ///
    circular_raw_ostream(raw_ostream &Stream, const char *Header,
                         size_t BuffSize = 0, bool Owns = REFERENCE_ONLY)
        : raw_ostream(/*unbuffered*/ true), TheStream(nullptr),
          OwnsStream(Owns), BufferSize(BuffSize), BufferArray(nullptr),
          Filled(false), Banner(Header) {
      if (BufferSize != 0)
        BufferArray = new char[BufferSize];
      Cur = BufferArray;
      setStream(Stream, Owns);
    }

~circular_raw_ostream() override {
      flush();
      flushBufferWithBanner();
      releaseStream();
      delete[] BufferArray;
    }

bool is_displayed() const override {
      return TheStream->is_displayed();
    }

/// setStream - Tell the circular_raw_ostream to output a
    /// different stream.  "Owns" tells circular_raw_ostream whether
    /// it should take responsibility for managing the underlying
    /// stream.
    ///
    void setStream(raw_ostream &Stream, bool Owns = REFERENCE_ONLY) {
      releaseStream();
      TheStream = &Stream;
      OwnsStream = Owns;
    }

/// flushBufferWithBanner - Force output of the buffer along with
    /// a small header.
    ///
    void flushBufferWithBanner();

private:
    /// releaseStream - Delete the held stream if needed. Otherwise,
    /// transfer the buffer settings from this circular_raw_ostream
    /// back to the underlying stream.
    ///
    void releaseStream() {
      if (!TheStream)
        return;
      if (OwnsStream)
        delete TheStream;
    }
  };
} // end llvm namespace

#endif

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