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| 1 // Copyright (c) 2011 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 "net/base/big_endian.h" |
| 6 |
| 7 #include "base/string_piece.h" |
| 8 |
| 9 namespace net { |
| 10 |
| 11 BigEndianReader::BigEndianReader(const void* buf, size_t len) |
| 12 : ptr_(reinterpret_cast<const char*>(buf)), end_(ptr_ + len) {} |
| 13 |
| 14 bool BigEndianReader::Skip(size_t len) { |
| 15 if (ptr_ + len > end_) |
| 16 return false; |
| 17 ptr_ += len; |
| 18 return true; |
| 19 } |
| 20 |
| 21 bool 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 |
| 29 bool 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 |
| 37 template<typename T> |
| 38 bool 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 |
| 46 bool BigEndianReader::ReadU8(uint8* value) { |
| 47 return Read(value); |
| 48 } |
| 49 |
| 50 bool BigEndianReader::ReadU16(uint16* value) { |
| 51 return Read(value); |
| 52 } |
| 53 |
| 54 bool BigEndianReader::ReadU32(uint32* value) { |
| 55 return Read(value); |
| 56 } |
| 57 |
| 58 BigEndianWriter::BigEndianWriter(void* buf, size_t len) |
| 59 : ptr_(reinterpret_cast<char*>(buf)), end_(ptr_ + len) {} |
| 60 |
| 61 bool BigEndianWriter::Skip(size_t len) { |
| 62 if (ptr_ + len > end_) |
| 63 return false; |
| 64 ptr_ += len; |
| 65 return true; |
| 66 } |
| 67 |
| 68 bool BigEndianWriter::WriteBytes(const void* buf, size_t len) { |
| 69 if (ptr_ + len > end_) |
| 70 return false; |
| 71 memcpy(ptr_, buf, len); |
| 72 ptr_ += len; |
| 73 return true; |
| 74 } |
| 75 |
| 76 template<typename T> |
| 77 bool BigEndianWriter::Write(T value) { |
| 78 if (ptr_ + sizeof(T) > end_) |
| 79 return false; |
| 80 WriteBigEndian<T>(ptr_, value); |
| 81 ptr_ += sizeof(T); |
| 82 return true; |
| 83 } |
| 84 |
| 85 bool BigEndianWriter::WriteU8(uint8 value) { |
| 86 return Write(value); |
| 87 } |
| 88 |
| 89 bool BigEndianWriter::WriteU16(uint16 value) { |
| 90 return Write(value); |
| 91 } |
| 92 |
| 93 bool BigEndianWriter::WriteU32(uint32 value) { |
| 94 return Write(value); |
| 95 } |
| 96 |
| 97 } // namespace net |
| 98 |
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