1// Copyright 2014 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "base/big_endian.h" 6 7#include "base/strings/string_piece.h" 8 9namespace base { 10 11BigEndianReader::BigEndianReader(const char* buf, size_t len) 12 : ptr_(buf), end_(ptr_ + len) {} 13 14bool BigEndianReader::Skip(size_t len) { 15 if (ptr_ + len > end_) 16 return false; 17 ptr_ += len; 18 return true; 19} 20 21bool BigEndianReader::ReadBytes(void* out, size_t len) { 22 if (ptr_ + len > end_) 23 return false; 24 memcpy(out, ptr_, len); 25 ptr_ += len; 26 return true; 27} 28 29bool BigEndianReader::ReadPiece(base::StringPiece* out, size_t len) { 30 if (ptr_ + len > end_) 31 return false; 32 *out = base::StringPiece(ptr_, len); 33 ptr_ += len; 34 return true; 35} 36 37template<typename T> 38bool BigEndianReader::Read(T* value) { 39 if (ptr_ + sizeof(T) > end_) 40 return false; 41 ReadBigEndian<T>(ptr_, value); 42 ptr_ += sizeof(T); 43 return true; 44} 45 46bool BigEndianReader::ReadU8(uint8* value) { 47 return Read(value); 48} 49 50bool BigEndianReader::ReadU16(uint16* value) { 51 return Read(value); 52} 53 54bool BigEndianReader::ReadU32(uint32* value) { 55 return Read(value); 56} 57 58bool BigEndianReader::ReadU64(uint64* value) { 59 return Read(value); 60} 61 62BigEndianWriter::BigEndianWriter(char* buf, size_t len) 63 : ptr_(buf), end_(ptr_ + len) {} 64 65bool BigEndianWriter::Skip(size_t len) { 66 if (ptr_ + len > end_) 67 return false; 68 ptr_ += len; 69 return true; 70} 71 72bool BigEndianWriter::WriteBytes(const void* buf, size_t len) { 73 if (ptr_ + len > end_) 74 return false; 75 memcpy(ptr_, buf, len); 76 ptr_ += len; 77 return true; 78} 79 80template<typename T> 81bool BigEndianWriter::Write(T value) { 82 if (ptr_ + sizeof(T) > end_) 83 return false; 84 WriteBigEndian<T>(ptr_, value); 85 ptr_ += sizeof(T); 86 return true; 87} 88 89bool BigEndianWriter::WriteU8(uint8 value) { 90 return Write(value); 91} 92 93bool BigEndianWriter::WriteU16(uint16 value) { 94 return Write(value); 95} 96 97bool BigEndianWriter::WriteU32(uint32 value) { 98 return Write(value); 99} 100 101bool BigEndianWriter::WriteU64(uint64 value) { 102 return Write(value); 103} 104 105} // namespace base 106