15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/big_endian.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "base/strings/string_piece.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace net { 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BigEndianReader::BigEndianReader(const void* buf, size_t len) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : ptr_(reinterpret_cast<const char*>(buf)), end_(ptr_ + len) {} 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianReader::Skip(size_t len) { 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ptr_ + len > end_) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ += len; 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianReader::ReadBytes(void* out, size_t len) { 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ptr_ + len > end_) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(out, ptr_, len); 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ += len; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianReader::ReadPiece(base::StringPiece* out, size_t len) { 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ptr_ + len > end_) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *out = base::StringPiece(ptr_, len); 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ += len; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)template<typename T> 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianReader::Read(T* value) { 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ptr_ + sizeof(T) > end_) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ReadBigEndian<T>(ptr_, value); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ += sizeof(T); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianReader::ReadU8(uint8* value) { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Read(value); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianReader::ReadU16(uint16* value) { 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Read(value); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianReader::ReadU32(uint32* value) { 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Read(value); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BigEndianWriter::BigEndianWriter(void* buf, size_t len) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : ptr_(reinterpret_cast<char*>(buf)), end_(ptr_ + len) {} 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianWriter::Skip(size_t len) { 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ptr_ + len > end_) 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ += len; 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianWriter::WriteBytes(const void* buf, size_t len) { 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ptr_ + len > end_) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(ptr_, buf, len); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ += len; 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)template<typename T> 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianWriter::Write(T value) { 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ptr_ + sizeof(T) > end_) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WriteBigEndian<T>(ptr_, value); 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ += sizeof(T); 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianWriter::WriteU8(uint8 value) { 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Write(value); 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianWriter::WriteU16(uint16 value) { 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Write(value); 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BigEndianWriter::WriteU32(uint32 value) { 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Write(value); 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace net 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 99