Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/lib/DebugInfo/CodeView/RecordSerialization.cpp

@@ -1,155 +0,0 @@
-//===-- RecordSerialization.cpp -------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// Utilities for serializing and deserializing CodeView records.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/CodeView/RecordSerialization.h"
-#include "llvm/ADT/APInt.h"
-#include "llvm/ADT/APSInt.h"
-#include "llvm/DebugInfo/CodeView/CodeViewError.h"
-#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
-#include "llvm/DebugInfo/CodeView/TypeRecord.h"
-#include "llvm/Support/BinaryByteStream.h"
-
-using namespace llvm;
-using namespace llvm::codeview;
-using namespace llvm::support;
-
-/// Reinterpret a byte array as an array of characters. Does not interpret as
-/// a C string, as StringRef has several helpers (split) that make that easy.
-StringRef llvm::codeview::getBytesAsCharacters(ArrayRef<uint8_t> LeafData) {
-  return StringRef(reinterpret_cast<const char *>(LeafData.data()),
-                   LeafData.size());
-}
-
-StringRef llvm::codeview::getBytesAsCString(ArrayRef<uint8_t> LeafData) {
-  return getBytesAsCharacters(LeafData).split('\0').first;
-}
-
-Error llvm::codeview::consume(BinaryStreamReader &Reader, APSInt &Num) {
-  // Used to avoid overload ambiguity on APInt construtor.
-  bool FalseVal = false;
-  uint16_t Short;
-  if (auto EC = Reader.readInteger(Short))
-    return EC;
-
-  if (Short < LF_NUMERIC) {
-    Num = APSInt(APInt(/*numBits=*/16, Short, /*isSigned=*/false),
-                 /*isUnsigned=*/true);
-    return Error::success();
-  }
-
-  switch (Short) {
-  case LF_CHAR: {
-    int8_t N;
-    if (auto EC = Reader.readInteger(N))
-      return EC;
-    Num = APSInt(APInt(8, N, true), false);
-    return Error::success();
-  }
-  case LF_SHORT: {
-    int16_t N;
-    if (auto EC = Reader.readInteger(N))
-      return EC;
-    Num = APSInt(APInt(16, N, true), false);
-    return Error::success();
-  }
-  case LF_USHORT: {
-    uint16_t N;
-    if (auto EC = Reader.readInteger(N))
-      return EC;
-    Num = APSInt(APInt(16, N, false), true);
-    return Error::success();
-  }
-  case LF_LONG: {
-    int32_t N;
-    if (auto EC = Reader.readInteger(N))
-      return EC;
-    Num = APSInt(APInt(32, N, true), false);
-    return Error::success();
-  }
-  case LF_ULONG: {
-    uint32_t N;
-    if (auto EC = Reader.readInteger(N))
-      return EC;
-    Num = APSInt(APInt(32, N, FalseVal), true);
-    return Error::success();
-  }
-  case LF_QUADWORD: {
-    int64_t N;
-    if (auto EC = Reader.readInteger(N))
-      return EC;
-    Num = APSInt(APInt(64, N, true), false);
-    return Error::success();
-  }
-  case LF_UQUADWORD: {
-    uint64_t N;
-    if (auto EC = Reader.readInteger(N))
-      return EC;
-    Num = APSInt(APInt(64, N, false), true);
-    return Error::success();
-  }
-  }
-  return make_error<CodeViewError>(cv_error_code::corrupt_record,
-                                   "Buffer contains invalid APSInt type");
-}
-
-Error llvm::codeview::consume(StringRef &Data, APSInt &Num) {
-  ArrayRef<uint8_t> Bytes(Data.bytes_begin(), Data.bytes_end());
-  BinaryByteStream S(Bytes, llvm::support::little);
-  BinaryStreamReader SR(S);
-  auto EC = consume(SR, Num);
-  Data = Data.take_back(SR.bytesRemaining());
-  return EC;
-}
-
-/// Decode a numeric leaf value that is known to be a uint64_t.
-Error llvm::codeview::consume_numeric(BinaryStreamReader &Reader,
-                                      uint64_t &Num) {
-  APSInt N;
-  if (auto EC = consume(Reader, N))
-    return EC;
-  if (N.isSigned() || !N.isIntN(64))
-    return make_error<CodeViewError>(cv_error_code::corrupt_record,
-                                     "Data is not a numeric value!");
-  Num = N.getLimitedValue();
-  return Error::success();
-}
-
-Error llvm::codeview::consume(BinaryStreamReader &Reader, uint32_t &Item) {
-  return Reader.readInteger(Item);
-}
-
-Error llvm::codeview::consume(StringRef &Data, uint32_t &Item) {
-  ArrayRef<uint8_t> Bytes(Data.bytes_begin(), Data.bytes_end());
-  BinaryByteStream S(Bytes, llvm::support::little);
-  BinaryStreamReader SR(S);
-  auto EC = consume(SR, Item);
-  Data = Data.take_back(SR.bytesRemaining());
-  return EC;
-}
-
-Error llvm::codeview::consume(BinaryStreamReader &Reader, int32_t &Item) {
-  return Reader.readInteger(Item);
-}
-
-Error llvm::codeview::consume(BinaryStreamReader &Reader, StringRef &Item) {
-  if (Reader.empty())
-    return make_error<CodeViewError>(cv_error_code::corrupt_record,
-                                     "Null terminated string buffer is empty!");
-
-  return Reader.readCString(Item);
-}
-
-Expected<CVSymbol> llvm::codeview::readSymbolFromStream(BinaryStreamRef Stream,
-                                                        uint32_t Offset) {
-  return readCVRecordFromStream<SymbolKind>(Stream, Offset);
-}