Revert "Support external startup data in V8."

src/snapshot-source-sink.cc

-// Copyright 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-
-#include "src/snapshot-source-sink.h"
-#include "src/checks.h"
-
-#include "src/handles-inl.h"
-#include "src/serialize.h"  // for SerializerDeserializer::nop() in AtEOF()
-
-
-namespace v8 {
-namespace internal {
-
-
-SnapshotByteSource::SnapshotByteSource(const byte* array, int length)
-    : data_(array), length_(length), position_(0) {
-}
-
-
-SnapshotByteSource::~SnapshotByteSource() { }
-
-
-int32_t SnapshotByteSource::GetUnalignedInt() {
-  ASSERT(position_ < length_);  // Require at least one byte left.
-#if defined(V8_HOST_CAN_READ_UNALIGNED) &&  __BYTE_ORDER == __LITTLE_ENDIAN
-  int32_t answer = *reinterpret_cast<const int32_t*>(data_ + position_);
-#else
-  int32_t answer = data_[position_];
-  answer |= data_[position_ + 1] << 8;
-  answer |= data_[position_ + 2] << 16;
-  answer |= data_[position_ + 3] << 24;
-#endif
-  return answer;
-}
-
-
-void SnapshotByteSource::CopyRaw(byte* to, int number_of_bytes) {
-  MemCopy(to, data_ + position_, number_of_bytes);
-  position_ += number_of_bytes;
-}
-
-
-void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) {
-  ASSERT(integer < 1 << 22);
-  integer <<= 2;
-  int bytes = 1;
-  if (integer > 0xff) bytes = 2;
-  if (integer > 0xffff) bytes = 3;
-  integer |= bytes;
-  Put(static_cast<int>(integer & 0xff), "IntPart1");
-  if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2");
-  if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3");
-}
-
-void SnapshotByteSink::PutRaw(byte* data, int number_of_bytes,
-                              const char* description) {
-  for (int i = 0; i < number_of_bytes; ++i) {
-    Put(data[i], description);
-  }
-}
-
-void SnapshotByteSink::PutBlob(byte* data, int number_of_bytes,
-                               const char* description) {
-  PutInt(number_of_bytes, description);
-  PutRaw(data, number_of_bytes, description);
-}
-
-
-bool SnapshotByteSource::AtEOF() {
-  if (0u + length_ - position_ > 2 * sizeof(uint32_t)) return false;
-  for (int x = position_; x < length_; x++) {
-    if (data_[x] != SerializerDeserializer::nop()) return false;
-  }
-  return true;
-}
-
-
-bool SnapshotByteSource::GetBlob(const byte** data, int* number_of_bytes) {
-  int size = GetInt();
-  *number_of_bytes = size;
-
-  if (position_ + size < length_) {
-    *data = &data_[position_];
-    Advance(size);
-    return true;
-  } else {
-    Advance(length_ - position_);  // proceed until end.
-    return false;
-  }
-}
-
-}  // namespace v8::internal
-}  // namespace v8