Move shared files in net/quic/ into net/quic/core/

net/quic/quic_data_reader.cc

-// Copyright (c) 2012 The Chromium 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 "net/quic/quic_data_reader.h"
-
-#include "net/base/int128.h"
-#include "net/quic/quic_protocol.h"
-
-using base::StringPiece;
-
-namespace net {
-
-QuicDataReader::QuicDataReader(const char* data, const size_t len)
-    : data_(data), len_(len), pos_(0) {}
-
-bool QuicDataReader::ReadUInt16(uint16_t* result) {
-  return ReadBytes(result, sizeof(*result));
-}
-
-bool QuicDataReader::ReadUInt32(uint32_t* result) {
-  return ReadBytes(result, sizeof(*result));
-}
-
-bool QuicDataReader::ReadUInt64(uint64_t* result) {
-  return ReadBytes(result, sizeof(*result));
-}
-
-bool QuicDataReader::ReadUFloat16(uint64_t* result) {
-  uint16_t value;
-  if (!ReadUInt16(&value)) {
-    return false;
-  }
-
-  *result = value;
-  if (*result < (1 << kUFloat16MantissaEffectiveBits)) {
-    // Fast path: either the value is denormalized (no hidden bit), or
-    // normalized (hidden bit set, exponent offset by one) with exponent zero.
-    // Zero exponent offset by one sets the bit exactly where the hidden bit is.
-    // So in both cases the value encodes itself.
-    return true;
-  }
-
-  uint16_t exponent =
-      value >> kUFloat16MantissaBits;  // No sign extend on uint!
-  // After the fast pass, the exponent is at least one (offset by one).
-  // Un-offset the exponent.
-  --exponent;
-  DCHECK_GE(exponent, 1);
-  DCHECK_LE(exponent, kUFloat16MaxExponent);
-  // Here we need to clear the exponent and set the hidden bit. We have already
-  // decremented the exponent, so when we subtract it, it leaves behind the
-  // hidden bit.
-  *result -= exponent << kUFloat16MantissaBits;
-  *result <<= exponent;
-  DCHECK_GE(*result,
-            static_cast<uint64_t>(1 << kUFloat16MantissaEffectiveBits));
-  DCHECK_LE(*result, kUFloat16MaxValue);
-  return true;
-}
-
-bool QuicDataReader::ReadStringPiece16(StringPiece* result) {
-  // Read resultant length.
-  uint16_t result_len;
-  if (!ReadUInt16(&result_len)) {
-    // OnFailure() already called.
-    return false;
-  }
-
-  return ReadStringPiece(result, result_len);
-}
-
-bool QuicDataReader::ReadStringPiece(StringPiece* result, size_t size) {
-  // Make sure that we have enough data to read.
-  if (!CanRead(size)) {
-    OnFailure();
-    return false;
-  }
-
-  // Set result.
-  result->set(data_ + pos_, size);
-
-  // Iterate.
-  pos_ += size;
-
-  return true;
-}
-
-StringPiece QuicDataReader::ReadRemainingPayload() {
-  StringPiece payload = PeekRemainingPayload();
-  pos_ = len_;
-  return payload;
-}
-
-StringPiece QuicDataReader::PeekRemainingPayload() {
-  return StringPiece(data_ + pos_, len_ - pos_);
-}
-
-bool QuicDataReader::ReadBytes(void* result, size_t size) {
-  // Make sure that we have enough data to read.
-  if (!CanRead(size)) {
-    OnFailure();
-    return false;
-  }
-
-  // Read into result.
-  memcpy(result, data_ + pos_, size);
-
-  // Iterate.
-  pos_ += size;
-
-  return true;
-}
-
-bool QuicDataReader::IsDoneReading() const {
-  return len_ == pos_;
-}
-
-size_t QuicDataReader::BytesRemaining() const {
-  return len_ - pos_;
-}
-
-bool QuicDataReader::CanRead(size_t bytes) const {
-  return bytes <= (len_ - pos_);
-}
-
-void QuicDataReader::OnFailure() {
-  // Set our iterator to the end of the buffer so that further reads fail
-  // immediately.
-  pos_ = len_;
-}
-
-}  // namespace net